• USGS Sci8ncb for a Changing World Names Is for Descriptive Purposes Only and Does Not Imply Endorsement by the U.S

;.• ~. '1. " ,r-=====~======~ u.s. Department of the Interior - U.S. Geological Survey McCarthy quadrangle

Descriptions of the mineral occurrences shown on the accompanying figure follow. See U.S. Geological Survey (1996) for a description of the information content of each field in the records. The data presented here are maintained as part of a statewide database on mines, prospects and mineral occurrences throughout Alaska.

! •. ~ ...... \. .. ,... {~' MC~?MCO~~::·:>::·:::·~>·"fN.(~~!y,~r, ·.tJ/C034 ' ) ·.M.C032 ( .• MC::,033

. -. --, ...... ,/' ", .MC010 MC062 , MC061~ '. "\ :'-'MG['15 \, 61' '-;----111~!.&.._::::::::::::..---_l ___.::_ __...L __ .:::.::;:....::2zr::::::::...... ::: 61' 144' 141' Distribution of mineral occurrences in the McCarthy 1:250,OOO-scale PROPERlY Of . quadrangle, eastern Alaska 5 LIBRARY This and related reports are accessible through the USGS World Wide Web siDG6 http:j jwww-mrs-ak.wr.usgs.govjardf. Comments or information regarding corrections or missing data, or requests for digital retrievals should be directed to Donald Grybeck, USGS, 4200 University Dr., Anchorage, AK 99508-4667, e-mail [email protected], telephone (907) 786-7424. This compilation is authored by:

Donald Richter U. S. Geological Survey 4200 University Drive Anchorage, AK 99508-4667 ''\ ..' ...... '-'-... ~ LocMion 01. IIlJ.p area in Al.aska

This report is preliminary and has /lot been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic code. Any use of trade, product, or firm • USGS sci8nCB for a changing world names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

OPEN-FILE REPORT 98-227 ~!.,",-" ,~, , ~laska Resource Data File Pagel

Site name(s): Valdez; Nugget Creek

Site Type: Mine

ARDF no. MCOO 1

Latitude: 61.65 Quadrangle: MC C-8

Longitude: 143.717

Location description and accuracy: On slopes north-northwest of the toe of Kuskulana Glacier. Best location: MacKevett and others, 1978, loco 18. Accurate within radius of 100 feet. Commodities: Main: Ag, Cu Other:

Ore minerals: Bornite, chalcopyrite

Gangue minerals: Quartz

Geologic description: Quartz vein more than 1 m thick containing bornite, chalcopyrite, and pyrite. Vein occurs along fault in Upper Triassic Nikolai Greenstone. Slablike copper nugget weighing several tonnes found as float in Nugget Creek near workings. Alteration: More than 1,200 m underground workings to depths of over 125 meters. Grade decreased with depth. Grab sample assayed >200 g/t Au, >2 percent Cu (MacKevett, 1976). Workings/Exploration: More than 1,200 m underground workings to depths of over 125 meters. Grade decreased with depth. Grab sample assayed >200 g/t Au, >2 percent Cu (MacKevett, 1976). e of mineralization: Cretaceous? Deposit model: Vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Yes: small Status: Inactive

Production notes: Development and production from 1916 to 1919. Produced 145 tonnes ore and concentrate ' Reserves:

Additional comments:

References: Moffit and Maddren, 1908; Moffit and Maddren, 1909; Moffit and Mertie, 1923; Van Alstine and Black, 1946; MacKevett, 1976, loco 139; MacKevett and others, 1978, loco 18. Primary reference: Moffit and Mertie, 1923 ~ ,Alaska Resource Data File Page 2

Reporter: Nokleberg, W.J., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/11/97 "

I Waska Resource Data File Page 3 Site name(s): London and Cape

Site Type: Prospect

ARDF no. MC002

Latitude: 61.567 Quadrangle: MC C-8

Longitude: 143.717

Location description and accuracy: West side of Trail Creek, a tributary to the Kuskulana River. Best Location: MacKevett and others, 1978, loco 33. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag, Mo

Ore minerals: Chalcopyrite

Gangue minerals:

Geologic description: Pyrite-chalcopyrite vein lets and disseminations in locally altered Upper JUrassic granodiorite and quartz diorite that intrudes Mesozoic sedimentary rocks. Alteration:

Workings/Exploration: Old adit. Grab samples assay as much as 1.5 ppm Ag, 20,000 ppm Cu, and 70 ppm Mo; most samples contained about 1,000 ppm Cu. Underground workings. Age of mineralization: Late Jurassic Deposit model: Porphyry Cu -Mo Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 21a Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; MacKevett, 1976, loco 129; MacKevett and others, 1978, loco 33. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Nokleberg, W.J., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/11/97 , aska Resource Data File Page 4

Site name(s): Kennicott Mine; Erie; ~umbo; Bonanza; Mother Lode

Site Type: Mine

ARDF no. MC003

Latitude: 61.528 Quadrangle: MC C-5

Longitude: 142.844

Location description and accuracy: Three miles northwest of town of Kennicott. Coordinates are for point at Jumbo, largest producer of Kennicott Mines. Other mines of Kennicott Complex are within 2 mi. of Jumbo and all are connected underground. Best location: MacKevett, 1970. Commodities: Main: Ag, Cu Other: Pb, Zn

Ore minerals: Azurite, bornite, chalcocite, chalcopyrite, cinnabar, covellite, enargite, galena, luzonite, malachite, sphalerite, tennantite

Gangue minerals:

Geologic description: Kennicott mines were renowned for the size and richness of their copper sulfide lodes. The largest known ore body (Jumbo Mine) consisting of almost pure chalcocite and covellite averaged 360 ft in height, was between 2 ft arid 60 ft wide, and extended along its northeasterly plunge for 1,500 ft. Origin and geologic history of deposits is complex, obscure, and multiple hypotheses are still debated. Mainly chalcocite and covellite, with minor enargite, bornite, chalcopyrite, luzonite, and pyrite. Tennantite, sphalerite, and galena extremely rare. Local surface oxidation of sulfides to malachite and azurite. Sulfides occur mainly as large, irregular, massive, wedge-shaped bodies, mainly in dolomitic parts of the Upper Triassic Chitistone or Nizina Limestone. Gener-ally less than 100 m above the Middle and(or) Upper Triassic Nikolai Greenstone. One of the most productive group of mines in Alaska from 1913 until 1938 when the ore was exhausted. More than 96 km of underground workings. Deposits interpreted by Armstrong and MacKevett (1982) as having formed by mobilization of Cu from the underlying Nikolai Greenstone and deposited by oxygenated groundwater and deposition in fossil karsts of a dolomitic sabkha interface in overlying limestone. Age of deposition interpreted as Cretaceous(?) with formation during regional low-grade metamorphism. Alteration: Oxidation of deposits is not related to present land surface. Practically entire deposit has been partially oxidized even i:p deepest levels of mine. Oxidized minerals are malachite, azurite, limonite, covellite, antlerite, chalcanthite, cuprite, Cu arsenates, brochantite (?). Workings/Exploration: Mines located 4,000-6,000 ft elevation with over 700 mi in underground workings; lowest workings reached 2,800 ft elevation. Surface and underground workings. Age of mineralization: Cretaceous? Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 ....., laska Resource Data File Page 5

Production: Yes; large Status: Inactive

Production notes: Produced about 544 million kg Cu and 280 million gAg from 4.3 million tonnes ore between 1913 and 1938. About 75 percent of ore mined was sulfide minerals of which 95 percent was chalcocite. ' Reserves:

Additional comments: Minor production in late 1960' s from surface talus deposits. References: Bateman and McLaughlin, 1920; Miller and Moffit, 1946; MacKevett, 1970, GQ- 899; MacKevett, 1971; MacKevett, 1976; MacKevett and others, 1977; Cobb and MacKevett, 1980; Armstrong and MacKevett, 1982. Primary reference: Bateman and McLaughlin, 1920

Reporter: Elliott, R.L, Nokleberg, W.J., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/11/97 ~ ,Alaska Resource Data File Page 6 Site name(s): Nelson

Site Type: Mine

ARDF no. MC004

Latitude: 61.451 Quadrangle: MC B-4

Longitude: 142.383

Location description and accuracy: Near junction of Glacier Creek and Chitistone River. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag

Ore minerals: Bornite, chalcocite, chalcopyrite, covellite, en argite , malachite, native Cu, unknown Ag minerals.

Gangue minerals: Calcite, dolomite, pyrite

Geologic description: Prospect lies on NE limb of a broad NW-trending syncline cut by two major faults: a thrust fault striking about N 45 Wand dipping SW along which the Nikolai Greenstone has overridden a section of Chitistone Limestone; and a high-angle normal fault striking about N 25 E. Stringers and discontinuous masses of disseminated to massive chalcocite and covellite and minor enargite, bornite, chalcopyrite, malachite, and native copper as replacements of limestone and dolomite along steeply inclined narrow fissures and bedding planes. Prospect is in near-basal part of a faulted block of Upper Triassic Chitistone Limestone. Local faulting and shearing. Alteration:

Workings/Exploration: Explored by surface pits and 5 short adits on 4 levels. About 1,100 ft of underground workings driven hetween 1929 and 1930; 3 adits were still accessible in 1951. Also explored by diamond drilling. Chip samples across massive sulfide veins assayed > 2 percent Cu, 0.3 percent As, 50 ppm Ag, (MacKevett and Smith, 1968). TYpe of workings: Surface.and underground . Age of mineralization: Cretaceous? Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Inactive

Production notes: Minor production 1929-1930. Reserves:

Additional comments: See also: Radovan (MC076 - MC078) and Kennicott (MC003) deposits. .1 , Waska Resource Data File Page 7

References: Bateman, 1932; Miller, 1946; Sainsbury, 1952; Berg and Cobb, 1967; MacKevett and Smith, 1968; MacKevett and Smith, 1972; MacKevett, 1976, loco 69. Primary reference: Bateman, 1932

Reporter: Leonard, K.R., Elliott, RL., Nokleberg, W.J., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/11/97 '. laska Resource Data File Page 8 Site name(s): Midas; Berg Creek

Site Type: Mine

ARDF no. MC005

Latitude: 61.553 Quadrangle: MC C-8

Longitude: 143.79

Location description and accuracy: Lower workings (2,790 ft elevation) are 1/2 mile southwest of approximate midpoint of Berg Creek, a tributary to Kuskulana River; Coordinates above are for lower workings of Midas. Best location: MacKevett and others, 1978, loco 36. Accurate within radius of 100 feet. Commodities: Main: Ag, Au, Cu Other:

Ore minerals: Chalcopyrite, gold, magnetite, pyrite

Gangue minerals:

Geologic description: At lower (main) workings Au-bearing quartz veins and magnetite and epidote skarn containing irregularly distributed pyrite and chalcopyrite occur in Chitistone Limestone, near contact with Jurassic granodiorite pluton. At upper workings disseminated to small masses of magnetite, pyrite, and chalcopyrite occur in quartz veins and skarn bodies in metamorphosed Triassic Nizina Limestone near contact to same Jurassic granodiorite pluton. Alteration:

Workings/Exploration: 5 adits in vicinity, all caved or blocked by ice by 1943. Grab sample of vein assayed: 8 ppm Au (AA), 10 ppm Ag, 1,000 ppm Cu, 20 ppm Mo. Grab sample of skarn assayed: 0.6 ppm Au (AA), 1.5 ppm Ag, 20,000 ppm Cu, 500 ppm Co (MacKevett, 1976). Undergro';lnd workings Age of mineralization: Jurassic Deposit model: Cu skarn Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 18b Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; Van Alstine and Black, 1946; Berg and Cobb, 1967; MacKevett, 1976, loco 107, 108; MacKevett and others, 1978, loco 36. -, , ~Iaska Resource Data File Page 9

Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Nokleberg, W.J., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/17/97 . 'I t,., ~laska Resource Data File Page 10

Site name(s): Nikolai

Site Type: Prospect

ARDF no. MC006

Latitude: 61.464 Quadrangle: MC B-5

Longitude: 142.676

Location description and accuracy: Near head of Nikolai Creek, a tributary of McCarthy Creek. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcopyrite

Gangue minerals: Calcite, epidote, pyrite, pyrrhotite, quartz

Geologic description: Two Cu-bearing veins, each less than 1 m thick, in shear zones in Triassic Nikolai Greenstone about 150 ft below base of Chitistone Limestone and just north of major fault. Veins mainly bornite and chalcopyrite, and minor pyrite, pyrrhotite and secondary Cu and Fe minerals in a quartz-calcite-epidote gangue. Alteration:

Workings/Exploration: Deposit known to natives in late 1800's. Developed in 1899 by open cuts and more than 100 m underground workings but little work since. Mostly inaccessible by 1943. Surface and underground workings. . Age of mineralization: . Cretaceous? Deposit model: Vein, replacement, shear zone Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Undet. Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Miller, 1946; MacKevett and Smith, 1968, loco 8; MacKevett, 1974; MacKevett, 1976, loco 75. Primary reference: Miller, 1946

Reporter: Leonard, KR., Elliott, R.L., Nokleberg, W.J., Richter, D.H. ., , ".laska Resource Data File Page 11

Reporter affiliation: USGS

Last report date: 3/7/94 , ~laska Resource Data File Page 12 Site name(s): Erickson

Site Type: Mine

ARDF no. MC007

Latitude: 61.406 Quadrangle: MC B-4

Longitude: 142.25

Location description and accuracy: Near head of Glacier Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag

Ore minerals: Chalcocite, cuprite, malachite, native Cu, tenorite

Gangue minerals:

Geologic description: Native Cu, tenorite, cuprite, and minor amounts of other Cu minerals in irregular masses, thin veins, and disseminated grains in upper parts of amygdaloidallava flows and, to a lesser extent, as fillings in amygdules or associated with quartz epidote veins in Triassic Nikolai Greenstone. Deposit may be restricted to one 6 to 8 ft lava bed containing numerous amygdules. Most of copper fine-grained; copper masses to 27 kg have been recorded. Alteration:

Workings/Exploration: Explored by about 100 m of underground workings in two tunnels and 3 levels. One sample assayed 70 ppm Ag, four samples ranged between 7 to 30 ppm Ag (MacKevett and Smith, 1968). Underground workings. Age of mineralization: Cretaceous? Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Inactive

Production notes: Minor production in 1917. Reserves:

Additional comments:

References: Miller, 1946; Berg and Cobb, 1967; MacKevett and Smith, 1968, samples 141-146; MacKevett, 1970, B 1333; MacKevett and Smith, 1972; MacKevett, 1976, loco 62.

Primary refer~nce: Miller, 1946

Reporter: Leonard, K.R., Elliott, R.L., Nokleberg, W.J., Richter, D.H. " . ~Alaska Resource Data File Page 13

Reporter affiliation: USGS

Last report date: 3/9/94 .. , , Naska Resource Data File Page 14

Site name(s): Westover

Site Type: Mine

ARDF no. MC008

Latitude: 61.397 Quadrangle: MC B-4

Longitude: 142.497

Location description and accuracy: Near head of Boulder Creek, a tributary of Dan Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag

Ore minerals: Bornite, chalcocite, chalcopyrite, malachite

Gangue minerals:

Geologic description: Bornite and minor chalcocite, malachite and chalcopyrite in wedge~shaped pods, lenses, veins, and disseminations in lower 20 ft of the Upper Triassic Chitistone Limestone which overlies the Nikolai Greenstone. Largest pod 10 m long and 3 m wide. Limestone locally silicified near are. Similar to Kennicott deposit (MC003).

Alteration:

Workings/Exploration: More than 400 m of underground workings on 4 unconnected levels driven between 1911 and 1930. Channel samples across lode contain 50 ppm Ag, 2,000 ppm As, >2 percent Cu (MacKevett and Smith, 1968). Age of mineralization: Cretaceous? Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Inactive

Production notes: Minor production 1911-1920. Reserves:

Additional comments:

Refefences: Miller, 1946; Berg and Cobb, 1967; MacKevett and Smith, 1968, samples 32-34; MacKevett, and Smith, 1972; MacKevett, 1976, loco 72. Primary reference: Miller, 1946

Reporter: Leonard, KR., Elliott, R.L., Nokleberg, W.J., Richter, D.H. ,., " -.....-.

/ Waska Resource Data File Page 15

Reporter affiliation: USGS

Last report date: 3/7/94 .1 , ~aska Resource Data File Page 16

Site name(s): Dan Creek

Site Type: Mine

ARDF no. MC009

Latitude: 61.375 Quadrangle: MC B-5

Longitude: 141.55

Location description and accuracy: A productive placer area along 6 miles of lower Dan Creek. Extends into McCarthy B-4 quadrangle. Best location: MacKevett, 1976, loco 57. Accurate within a few hundred feet. Commodities: Main: Au Other: Ag, Cu, Pb, Sb

Ore minerals: Galena, gold, native copper, silver, stibnite

Gangue minerals:

Geologic description: Stream gravels 8 to 12 ft deep; gold on bedrock and lower 2 ft of gravel and in top 1 ft of rippable shale bedrock; bench placers mined to lesser extent. In 1939 a 3 ton copper nugget was found on Dan Creek Alteration:

Workings/Exploration: Type of workings: Surface and underground. Mostly small-scale hand and open-cut hydraulic methods; some drift mining. Age of mineralization:

Deposit model: Placer: bench & stream placers, and some ancient channel Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 39a Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments: A little fine gold can be panned from practically all the streams draining the north flank of the Chugach Mountains. References: Moffit and Capps, 1911; Cobb, 1973, B 1374; MacKevett,1974; MacKevett and Smith,1972; MacKevett, 1976, loco 57. Primary reference: Moffit and Capps, 1911

Reporter: Garrison, Michael T., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS'

Last report date: 7/28/97 , I

~Alaska Resource Data File Page 18

Site name(s): Chakina River

Site Type: Occurrence

ARDF no. MC010

Latitude: 61.113 Quadrangle: MC A-6

Longitude: 143.112

Location description and accuracy: Includes two occurrences widely separated (5.4 mil by the Chakina River. The westernmost occurrence is near the headwaters of an unnamed western tributary of . Chakina River, 4 miles north of Goodlata Peak. The easternmost occurrence is on an unnamed ridgetop 2 miles east of Chakina River, 5 miles northeast of Goodlata Peak. Coordinates are for westernmost occurrence. Best location: MacKevett, 1976, locs. 20,21. Accurate within radius of 1,000 feet. Commodities: Main: Cr, Ni Other:

Ore minerals: Chromite

Gangue minerals: Serpentine

Geologic description: Disseminated chromite in serpentinized alpine-type ultramafic body that cuts metamorphic rocks of the Pennsylvanian-Permian Skolai Group. Alteration:

Workings/Exploration: No workings. Age of mineralization:

Deposit model: Podiform chromite Deposit :model number (After Cox and Singer, 1986 or Bliss, 1992): 8a . Production: No status: Inactive

Production notes:

Reserves:

Additional co:m:ments:

References: MacKevett, 1976; U.S. Bureau of Mines, 1995, (MILS #0020870145). Primary reference: MacKevett, 1976

Reporter: D. Singer, Richter, D.H. , ~laska Resource Data File Page 19

Reporter affiliation: USGS

Last report date: 11/14/97 l.~: ., ,

aska Resource Data File Page 20

Site name(s): Hanagita River; Klu River

Site Type: Occurrence

ARDF no. MC011

Latitude: 61.219 Quadrangle: Me A~7

Longitude: 143.298

Location description and accuracy: At the headwaters of an unnamed southeast flowing tributary of the Klu River, near BM Verde. Best location: MacKevett, 1976, locs. 41, 42. Accurate within radius of 1,000 feet. Commodities: Main: Cr Other:

Ore minerals: Chromite

Gangue minerals: Serpentine

Geologic description: Disseminated chromite in serpentinized alpine~type ultramafic rock in metamorphic rocks of the Pennsylvanian-Permian Skolai Group. Alteration:

Workings/Exploration: No workings. Age of mineralization:

Deposit model: Podiform chromite Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 8a Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Mackevett, 1976; U.S. Bureau of Mines, 1995, (MILS#0020870146). Primary reference: MacKevett, 1976

Reporter: D. Singer, Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/14/97 , "laska Resource Data File Page 21 Site name(s): Lakina

Site Type: Prospect

ARDF no. MC012

Latitude: 61.558 Quadrangle: MC C-7

Longitude: 143.396

Location description and accuracy: Near toe of Lakina Glacier. Best location: Winkler and MacKevett, 1981. Accurate within a radius of 1 mile. Commodities: Main: Cu Other:

Ore minerals: Azurite, bornite, chalcocite, covellite, malachite, native Cu

Gangue minerals:

Geologic description: Two shear zones, each less than 1 m thick, in Triassic Nikolai Greenstone contain chalcocite, bornite, covellite, malachite, azurite. Nearby brecciated flow top in Nikolai Greenstone contains native Cu. Alteration:

Workings/Exploration: Adit on two shear zones and surficial workings along brecciated flow top containing native Cu. Type of workings: surface and underground Age of mineralization:

Deposit model: Lode: vein, shear zone, disseminated

Deposit model num~er (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Moffit, 1918; Berg and Cobb, 1967; MacKevett, 1976, loco 101; Winkler and MacKevett, 1981. Primary reference: Moffit and Maddren, 1909

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/31/97 ~Iaska Resource Data File Page 22 Site name(s): Kinney-Golden

Site Type: Prospect

ARDF no. MC013

Latitude: 61.513 Quadrangle: MC C-8

Longitude: 143.631

Location description and accuracy: Near head of Chokosna River. Best location: MacKevett, 1976, loco 104. Accurate within radius of 1,000 feet. Commodities: Main: eu Other:

Ore minerals: Chalcopyrite

Gangue minerals:

Geologic description: Chalcopyrite and secondary Cu-minerals localized along subsidiary faults near a major thrust fault. Faults cut Triassic Nikolai Greenstone and lower member of Jurassic-Triassic McCarthy Formation. Alteration:

Workings/Exploration: Explored by an adit and trenches. Type of workings: surface and underground. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: Major NW-trending thrust fault to the southwest of prospect References: Moffit, 1918; Berg and Cobb, 1967; MacKevett, 1976, loco 104; MacKevett and others, 1978. . Primary reference: Moffit, 1918

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/31/97 : laska Resource Data File Page 23

Site name(s): Calcite

Site Type: Prospect

ARDF no. MC014

Latitude: 61.546 Quadrangle: MC C-8

Longitude: 143.722

Location description and accuracy: At 5,990 ft elevation, above headwaters of MacDougall Creek, a tributary on the south side of Kuskulana River. Best location: MacKevett and others, 1978, lac. 37. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcopyrite

Gangue minerals:

Geologic description: Abundant serpentine minerals and sparsely disseminated pyrite, chalcopyrite and secondary Cu-minerals in brecCiated fault zone in Triassic Chitistone Limestone near contact with Jurassic granodiorite pluton. Alteration:

Workings/Exploration: Explored by short adit. Type of workings: underground Age of mineralization:

Deposit model: Lode: vein, disseminated, shear zone Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: , Moffit and Mertie, 1923; Van Alstine and Black, 1946'; Berg and Cobb, 1967; MacKevett, 1976, lac. 106; MacKevett and others, 1978, lac. 37. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/31/97 ~laska Resource Data File Page 24

Site name(s): La Tendre

Site Type: Prospect

ARDF no. MC015

Latitude: 61.037 Quadrangle: MC A-7

Longitude: 143.401

Location description and accuracy: Eastern side of headwaters of Golconda Creek, on western flank of unnamed peak near 6,400 ft elevation. Best location: MacKevett, 1976, loco 11. Accurate within radius of 1,000 feet. Commodities: Main: Au Other:

Ore minerals: Gold

Gangue minerals:

Geologic description: Gold-bearing quartz in brecciated fault zone in sedimentary rocks of the Jurassic Cretaceous Valdez Group. Alteration:

Workings/Exploration: Type of workings: surface Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Undet. Status: Inactive

Production notes:

Reserves:

Additional comments: In 1970 site was largely covered by surficial debris. References: Moffit, 1937; MacKevett, 1976, loco 11. Primary reference: Moffit, 1937

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/31/97 \~..• 11, 'r"- , 1A,laska Resource Data File Page 25

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC016

Latitude: 61.637 Quadrangle: MC C-4

Longitude: 142.347

Location description and accuracy: Northeast flank of BM Foothill - 2,500 ft west of headwaters of unnamed northward flowing tributary of Skolai Creek. Best location: MacKevett, 1970. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Azurite, chalcopyrite

Gangue minerals: Quartz

. Geologic description: Chalcopyrite and azurite-bearing quartz veins up to 10 cm thick in Cenozoic Wrangell Lava. Alteration:

Workings/Exploration: None Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1970, GQ-844; MacKevett, 1976, loc.113. Primary reference: MacKevett, 1970

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H .

. Reporter affiliation: USGS

Last report date: 7/31/97 ).~:

, ",Iaska Resource Data File Page 26

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC017

Latitude: 61.623 Quadrangle: MC C-4

Longitude: 142.42

Location description and accuracy: 1,000 ft east of Nizina Glacier, 3 mi up-glacier from toe. Best location: MacKevett, 1970. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, malachite

Gangue minerals: Calcite, quartz,

Geologic description: Chalcocite- and malachite-bearing quartz-calcite veins up to 20 cm thick in Triassic Nikolai Greenstone. Near major fault juxtaposing Nikolai Greenstone against Cretaceous Moonshine Creek Formation. Alteration:

Workings/Exploration: None Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1970, GQ-844; MacKevett, 1976, loco 114. Primary reference: MacKevett, 1970

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/31/97 r.,!'+. ~II

~laska Resource Data File Page 27 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC018

Latitude: 61.631 Quadrangle: MC C-4

Longitude: 142.417

Location description and accuracy: 1,500 ft east of Nizina Glacier, 3.75 mi up-glacier from toe. Occurrence is 3/4 mile north of MCO 17. Best location: MacKevett, 1970. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, malachite

Gangue minerals:

Geologic description: Chalcocite and malachite-bearing quartz-calcite veins near fault juxtaposing Triassic Nikolai Greenstone against Permian Hasen Creek Formation. Alteration:

Workings/Exploration: None . Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1970, GQ-844; MacKevett, 1976, loco 114. Primary reference: MacKevett, 1970

Repol'ter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 7/31/97 h.laska Resource Data File Page 28

Site name(s): Unnamed

Site Type: Prospect

ARDF no. MCO 19

Latitude: 61.561 Quadrangle: MC C-6

Longitude: 142.978

Location description and accuracy: Western flank of Donoho Peak. Best location: MacKevett, 1976, loco 115. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, secondary Cu minerals

Gangue minerals:

Geologic description: Sparsely distributed secondary copper minerals and chalcocite along fault near contact between Triassic Nikolai Greenstone and Triassic Chitistone Limestone. Alteration:

Workings/Exploration: Explored by a short adit. Type of workings: underground Age of mineralization:

Deposit model: Lode; vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: See also: Regal mine (MC092) References: MacKevett, 1972; MacKevett, 1976, loco 115. Primary reference: MacKevett, 1976

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 8/6/97 , .. J..i! , ~aska Resource Data File Page 29 Site name(s): Nebraska

Site Type: Prospect

ARDF no. MC020

Latitude: 61.56· Quadrangle: MC C-6

Longitude: 143.178

Location description and accuracy: Includes several prospects on both sides of Hidden Creek. Best location: Mackevett, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcanthite, chalcocite, chalcopyrite, malachite

Gangue minerals:

Geologic description: . Cu sulfides and secondary Cu minerals in Triassic Nikolai Greenstone mainly localiized along faults at or near contact with Triassic Chitistone Limestone. Alteration:

Workings/Exploration: Explored by short adits and surface excavations. Evidence of recent workings in prospects north of Hidden Creek (MacKevett, 1976). Type of workings: surface and underground. . Age of mineralization:

DeposJt model: Lode; vein

Deposit model num~er (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Miller,1946; Berg and Cobb, 1967; MacKevett, 1972; MacKevett, 1976, loco 100, 116-118. Primary reference: Moffit and Maddren, 1909

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 8/4/97 , ~aska Resource Data File Page 30

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC021

Latitude: 61.563 Quadrangle: MC C-8

Longitude: 143.643

Location description and accuracy: Near head of Slatka Creek. Best location: MacKevett and others, 1978, loco 35. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Fe

Ore minerals: Chalcopyrite, magnetite

Gangue minerals:

Geologic description: Magnetite-rich skarn containing disseminated chalcopyrite developed in Triassic marble near Jurassic granodiorite pluton. Alteration:

Workings/Exploration: Grab sample assayed (MacKevett, 1976): 0.06 ppm Au (AA), 1,500 ppm Cu, 7 ppmMo, > 20 percent Fe. Type of workings: surface Age of mineralization:

Deposit model: Cu skarn Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 18b Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: Not large enough to encourage development on the basis of iron content alone. References: MacKevett, 1976, loco 121; MacKevett and others, 1978, loco 35. Primary reference: MacKevett and others, 1978

Reporter: Leonard, K.R., Elliott, R.L., D. Singer, Richter, D.H.

Reporter affiliation: USGS

Last report date: 8/4/97 , Waska Resource Data File Page 31

Site name(s): Pierson

Site Type: Prospect

ARDF no. MC022

Latitude: 61.607 Quadrangle: MC C-8

Longitude: 143.676

Location description and aoouraoy: On slopes 6,000 ft southeast of toe of Kuskulana Glacier. Best location: MacKevett and others, 1978, loco 26. Accurate within radius of 100 feet. Commodities: Main: Ag, Au Other: Cu

Ore minerals: Chalcopyrite, native gold

Gangue minerals:

Geologio description: Malachite-stained shear zone contains pyrite, chalcopyrite, and free gold. Shear zone, 1 m wide, occurs between Triassic Nikolai Greenstone and a brecciated latite dike, about 9 m thick, that intrudes along the contact of the Nikolai Greenstone and the Triassic Chitistone Limestone. Alteration: Oxidation of Cu minerals. Workings/Exploration: Grab sample assayed (MacKevett, 1976): 0.1 ppm Au (AA), 1.5 ppm Ag, 1,000 ppm As, 200 ppm Cu, 700 ppm Zn. Type of workings: surface. Age of mineralization:

Deposit model: Lode: disseminated, shear zone Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 126; MacKevett and others, 1978, loco 26. Primary referenoe: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H. Alaska Resource Data File Page 32

Reporter affiliation: USGS

Last report date: 8/7/97 laska Resource Data File Page 33 Site name(s): Mayflower

Site Type: Prospect

ARDF no. MC023

Latitude: 61.63 Quadrangle: MC C-7

Longitude: 143.62

Location description and accuracy: 2,500 ft south of Kuskulana Glacier. NW1/4NW1/4 sec. 9, T. 3 S., R 10 E., of the Copper River Meridian. Winkler and MacKevett, 1981. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite

Gangue minerals:

Geologic description: Bornite, chalcocite and secondary Cu minerals in narrow veins along faults in Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Short adit. Type of workings: underground Age of mineralization:

Deposit model: Lode; vein, shear zone Deposit model number (After Cox and Singer, 1986 or Bliss, 19921:

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; MacKevett, 1976, loco 127; Winkler and MacKevett, 1981. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 8/7/97 II it' .' , ~aska Resource Data File Page 34

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC024

Latitude: 61.631 Quadrangle: MC C-8

Longitude: 143.634

Location description and l;lccuracy: 500 ft southeast of Kuskulana Glacier at a point 2 mi up-glacier from toe. Best location: MacKevett and others, 1978, loco 23. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Native Cu, tenorite

Gangue minerals: Epidote, quartz

Geologic description: Epidote-quartz amygdules in Triassic Nikolai Greenstone contain native Cu and tenorite. Alteration:

Workings/Exploration: Grab sample (MacKevett, 1976) assayed 3,000 ppm Cu. Type of workings: none Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1976, loco 128; MacKevett and others, 1978, loco 23 . . Primary reference: MacKevett and others, 1978

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 8/8/97 , ~Iaska Resource Data File Page 35

Site name(s): War Eagle

Site Type: Prospect

ARDF no. MC025

Latitude: 61.559 Quadrangle: MC C-8

Longitude: 143.741

Location description and accuracy: At 3,500 ft elevation - 700 ft southwest of MacDougall Creek, about a mile downstream from headwaters. Best location: Mac Kevett and others, 1978, loco 32. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Fe

Ore minerals: Chalcopyrite, magnetite

Gangue minerals: Calcite, chlorite, diopside, epidote, garnet, pyrite, pyrrhotite, quartz

Geologic description: Small masses of magnetite and diopside skarn in Triassic Chitistone Limestone adjacent to Jurassic granodiorite pluton, contain pyrite, pyrrhotite, chalcopyrite, ypidote, chlorite, calcite and quartz. Mineralized zone is up to 8 m thick. Alteration: Contact metamorphism of limestone Workings / Exploration: Explored by 100 ft adit and surface cuts. Grab samples assayed as much as 1,000 ppm Cu and 62 percent Fe (MacKevett, 1976).Type of workings: surface and underground. Age of mineralization: Jurassic?

Deposit model~ Cu skarn Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 18b Production: No Status: Inactive

Production notes:

Reserves: Probably less than 10,000 tons of material assaying as much as 62 percent Fe. Additional comments:

References: Moffit and Mertie, 1923; Moffit, 1938; Miller, 1946; Berg and Cobb, 1967; MacKevett, 1976, loco 130; MacKevett and others, 1978, loco 32. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., D. Singer, Richter, D. H. ll/Tr " , ~Iaska Resource Data File Page 36

Reporter affiliation: USGS

Last report date: 8/6/97 'lr, \1" " , ~aska Resource Data File Page 37

Site name(s): Copper Queen; Rarus

Site Type: Prospect

ARDF no. MC026

Latitude: 61.559 Quadrangle: MC C-8

Longitude: 143.758

Location description and accuracy: 2,500 ft north of headwaters of unnamed stream located between Berg Creek and MacDougall Creek. Best location: MacKevett and others, 1978, loco 31. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Fe

Ore minerals: Chalcopyrite, magnetite

Gangue minerals: Gamet, quartz

Geologic description: Contact metamorphic deposit consisting of veinlets and small irregular bodies of magnetite, pyrrhotite, pyrite and chalcopyrite in faulted and silicified and gametized Triassic Chitistone Limestone adjacent to Jurassic granodiorite pluton. Alteration:

Workings/Exploration: Moffit and Mertie (1923) report that workings consist of a 433 ft adit and a 50 ft crosscut; MacKevett (1976) reports a 360-m adit. Adit caved at portal in 1943. Type of workings: underground Age of mineralization: Jurrasic? Deposit model: Cu skarn Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 18b Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: See also: War Eagle (MC025) References: Moffit and Mertie, 1923; Van Alstine and Black, 1946; MacKevett, 1976, loco 131; MacKevett and others, 1978, loco 31. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, KR,., Elliott, RL., D. Singer, Richter, D.H. .' , :~laska Resource Data File Page 38

Reporter affiliation: USGS

Last report date: 8/28/97

r , Waska Resource Data File Page 39

Site name(s): Blackburn

Site Type: Prospect

ARDF no. MC027

Latitude: 61.62 Quadrangle: MC C-8

Longitude: 143.789

Location description and accuracy: 1,700 ft southwest of Porcupine Creek, a tributary of the Kuskulana River, at a point 1.5 miles downtream from headwaters. Best location: MacKevett and others,1978, loc.24. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Au?

Ore minerals: Chalcopyrite

Gangue minerals:

Geologic description: Copper-stained fault zones, containing chalcopyrite, pyrite, and possibly gold, in Triassic Nikolai Greenstone that is cut by diorite apophyses of the Jurassic Chitina Valley pluton. Alteration:

Workings/Exploration: Open cuts and adits. Type of workings: surface and underground. Age of mineralization:

Deposit model: Lode: disseminated, vein, shear zone Deposit model .number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; MacKevett, 1976, loco 135; MacKevett and others, 1978, loc.24. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter,D.H.

Reporter affiliation: USGS

Last report date: 8/29/97 ..

~laska Resource Data File Page 40 Site name(s): Great Northern Development Company

Site Type: Prospect

ARDF no. MC028

Latitude: 61.628 Quadrangle: MC C-8

Longitude: 143.844

Location description and accuracy: 1,200 ft east of headwaters of Clear Creek, a tributary of the Kuskulana River. Best location: MacKevett and others, 1978, loco 20, 21, 22, 25; coordinates given above are for the most developed prospect at loco 22. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag, Au, Mo, Pb

Ore minerals: Azurite, bornite, chalcocite, chalcopyrite, covellite, galena, malachite, molybdenite

Gangue minerals: Aragonite, calcite, magnetite, pyrite, quartz, stilbite

Geologic description: Chiefly pyrite, chalcopyrite, and secondary copper minerals in disseminations and veins up to 2 m wide along faults in Triassic Nikolai Greenstone and Jurassic granodiorite. Alteration:

Workings/Expioration: Explored by several adits and open cuts. Grab sample (MacKevett, 1976, loco 137; MacKevett and others, 1978, loco 22) assayed 0.5 ppm Au (AA), 5 ppm Ag, 20,000 ppm Cu. Type of workings: surface and underground. Age of mineralization:

Deposit model: Lode: vein, disseminated Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Active

Production notes:

Reserves:

Additional comments:

References: Van Alstine and Black, 1946; Berg and Cobb, 1967; MavKevett, 1976, loco 133, 136-138, MacKevett and others, 1978, loco 20-22, 25. Primary reference: Van Alstine and Black, 1946

Reporter: Leonard, K.R., Elliott, R.t., Richter, D.H. , ~laska Resource Data File Page 41

Reporter affiliation: USGS

Last report date: 9/15/97 ., , .. , , \\laska Resource Data File Page 42

Site name(s): Fourth of July Creek; Woodin and Herman

Site Type: Prospect

ARDF no. MC029

Latitude: 61.524 Quadrangle: MC C-6

Longitude: 143.156

Location description and accuracy: 1,000 ft upslope from headwaters of Fourth of July Creek. Best location: MacKevett, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcopyrite, malachite

Gangue minerals:

Geologic description: Chiefly secondary copper minerals on joints and minor faults in Triassic Nikolai Greenstone. Alteration: Oxidation of Cu minerals. Workings/Exploration: Short adit and remnants of numerous 'surface workings. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Sing.et; 1986 or Bliss, 1992): 23 Production: Undet.· Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Miller, 1946; Berg and Cobb, 1967; MacKevett, 1972; MacKevett, 1976, loco 99. Primary reference: Moffit and Maddren, 1909

Reporter: Leonard, K.R, Elliott, RL., Richter, D;H.

Reporter affiliation: USGS

Last report date: 11/14/97 .,. ..

~laska Resource Data File Page 43

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC030

Latitude: 61.57 Quadrangle: MC C-8

Longitude: 143.895

Location description and accuracy: 1,700 ft west of Squaw Creek, at a point 1.4 mi upstream from confluence of Squaw Creek with Kuskulana River. Best location: MacKevett and others, 1978, loco 30. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag, Mo

Ore minerals: Bornite

Gangue minerals:

Geologic description: Bornite-bearing veins up to 6 cm thick in altered fault zone 2 m wide in Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Surface workings. Grab sample (MacKevett, 1976) of vein material assayed 200 ppm Ag, >20,000 ppm Cu, 7 ppm Mo. Age of mineralization:

Deposit model: Lode: vein Deposit model numl)er (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1976, loco 140; MacKevett and others, 1978, loco 30. Primary reference: MacKevett, 1976

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/15/97 '.. , \4laska Resource Data File Page 44

Site name(s): Strelna Creek

Site Type: Prospect

ARDF no. MC031

Latitude: 61.621 Quadrangle: MC C-8

Longitude: 143.982

Location description and accuracy: Along western bank of Strelna Creek, 1.3 mi downstream from headwaters. MacKevett and others, 1978, lac. 19. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Malachite, pyrite(?)

Gangue minerals: Calcite

Geologic description: 2-m-wide altered fault zone in Triassic Nikolai Greenstone, near contact with Triassic Chitistone Limestone, contains sporadically distributed pyrite-calcite veins exhibiting minor malachite staining. . Alteration: Oxidation of Cu minerals Workings/Exploration: Type of workings: surface Age of mineralization:

Deposit model: Lode: vein, disseminated Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Mendenhall, 1905; Moffit and Maddren, 1909; MacKevett, 1976, loco 147; MacKevett and others, 1978, lac. 19. Primary reference: Moffit and Maddren; 1909

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/15/97 Waska Resource Data File Page 45 Site name(s): Unnamed

Site Type: Prospect

ARDF no. MC032

Latitude: 61.674 Quadrangle: MC C-2

Longitude: 141.664

Location description and accuracy: 3,400 ft west of headwaters of Sheep Creek, a tributary of White River. Best location: MacKevett, 1976, loco 148. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, cuprite, malachite, native Cu

Gangue minerals:

Geologic description: Native copper, cuprite, chalcocite and malachite in amygdules in Triassic Nikolai Greenstone. Alteration:

Workings /Explora tion: Type of workings: underground. Caved adit on property. Age of mineralization: Triassic? Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Capps, 1916; Knaebel,1970; MacKevett, 1976, loco 148. Primary reference: Capps ,1916

Repo.tter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/15/97 , ~aska Resource Data File Page 46

Site name(s): Unnamed

Site Type: Prosp~ct

ARDF no. MC033

Latitude: 61.647 Quadrangle: MC C-3

Longitude: 141.792

Location description and accuracy: 4,000 ft east of Russell Glacier, 3.75 mi northeast of BM Skolai. Best location: MacKevett, 1976, loco 151. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, native copper.

Gangue minerals: Calcite, prehnite

Geologic description: Amygdules and veinlets of intergrown prehnite, calcite, chalcocite and native copper in Triassic Nikolai Greenstone. Altel'ation:

Workings/Exploration: Type of workings: surface Age of mineraliza tion:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Capps, 1916; Berg and Cobb, 1967; Knaebel, 1970; MacKevett, 1976, loco 151. Primal'y reference: Capps, 1916

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/15/97 , %.laska Resource Data File Page 47 Site name(s): Unnamed

Site Type: Prospect

ARDF no. MC034

Latitude: 61.694 Quadrangle: MC C-3

Longitude: 141.853

Location description and accuracy: Within 2,000 ft radius ofBM Russell. Best location: MacKevett, 1976, loco 153. Accurate within radius of 1,000 feet. Commodities: Main: Cu other:

Ore minerals: Bornite, chalcocite

Gangue minerals:

Geologic description: Thin veins of bornite and chalcocite in Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Type of workings: surface Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Capps, 1916; Knaebel,1970; MacKevett, 1976, loco 153. Primary reference: Capps, 1916

Rep~!ter: Leonard, K.R., Elliott, R.L.,Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/15/97 ·~laska Resource Data File Page 48

Site name(s): Skolai Mining Company

Site Type: Prospect

ARDF no. MC035

Latitude: 61.717 Quadrangle: MC C-3

Longitude: 141.839

Location description and accuracy: Near toe of Russell Glacier, 1.6 mi north-northeast of BM Russell. Best location: MacKevett, 1976, loco 155. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite

Gangue minerals:

Geologic description: Thin malachite- and chalcocite-bearing veins in sheared Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Type of workings: surface. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 . Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Capps, 1916; Knaebel,1970; MacKevett, 1976, loco 155 Primary reference: Capps, 1916

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/18/97 , ~laska Resource Data File Page 49

Site name(s): Big Horn; Finch

Site Type: Prospect

ARDF no. MC036

Latitude: 61.657 Quadrangle: MC C-7

Longitude: 143.611

Location description and accuracy: 2,000 ft north of Kuskulana Glacier, 4 rrti up-glacier from toe, where glacier flows westward. Best location: MacKevett, 1976, loco 157. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite, malachite.

Gangue minerals:

Geologic description: Bornite-, chalcocite-, and malachite-bearing veins and pods in strongly faulted Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Type of workings: surface and underground. Several adits and widespread surficial workings. Age of mineralization:

Deposit model: Basaltic Cu Deposit model numl?er (After Cox and Singer, 1986 or Bliss, 1992): 23 . Production: No Status: Inactive

Production notes:

Resetves:

Additional comments:

References: Moffit, 1918; Moffit and Mertie, 1923; VanAlstine and Black, 1946; Berg and Cobb, 1967; MacKevett, 1976, loco 157. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, KR, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/18/97 , "-.Iaska Resource Data File Page 50 Site name(s): Roaring Creek

Site Type: Prospect

ARDF no. MC037

Latitude: 61.682 Quadrangle: MC C-8

Longitude: 143.832

Location description and accuracy: Near headwaters of Roaring Creek, a tributary of Kotsina River. Best location: MacKevett and others, 1978, loco 15. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite, chalcopyrite, malachite

Gangue minerals:

Geologic description: Thin veins containing Small amounts of chalcopyrite, bornite, chalcocite and malachite that cut Permian sedimentary rocks and Triassic gabbro. Alteration:

Workings/Exploration: Type of worl;dngs: surface and underground. Several prospects marked by old, largely caved workings on both sides of Roaring Creek. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 159; MacKevett and others, 1978, loco 15. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/19/97 i-'!" if"

, ~laska Resource Data File Page 51

Site name(s): Skyscraper

Site Type: Prospect

ARDF no. MC038

Latitude: 61.704 Quadrangle: MC C-8

Longitude: 143.801

Location description and accuracy: 2,200 ft north (along ridge) of Skyscraper Peak summit. Best location: MacKevett and others, 1978, loco 11. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, covellite, native copper

Gangue minerals: Epidote, hematite, quartz,

Geologic description: Thin veins, lenses and local disseminations of chalcocite and minor native copper and covellite in Triassic Nikolai Greenstone. Largest lens reported was only 6 in thick by 3 feet long. Alteration:

Workings/Exploration: Type of workings: underground. Explored by several short adits. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: See also: Roaring Creek prospects (MC037). References: Mendenhall, 1905; Moffit and Maddren, 1909; Moffit and Mertie, 1923; MacKevett, 1976, loco 161; MacKevett and others, 1978, loco 11. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/19/97 , ~aska Resource Data File Page 52

Site name(s): Peacock Creek

Site Type: Prospect

ARDF no. MC039

Latitude: 61.704 Quadrangle: MC C-8

Longitude: 143.764

Location description and accuracy: On ridges above headwaters of Peacock Creek drainage, a tributary of Kotsina River. Several old claims lie. within 1 mile of this location. Best location: MacKevett and others, 1978, loco 12. Accurate to within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals:

Gangue minerals:

Geologic description: Copper-bearing veins in Triassic Nikolai Greenstone which is cut by apophyses of Jurassic granodiorite. Alteration:

Workings /Exploration: Type of workings: surface Age of mineralization:

Deposit model: Basaltic eu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 162; MacKevett and others, 1978, loco 12. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/19/97 ';,t>I'"

, ",laska Resource Data File Page 53

Site name(s): Amy Creek

Site Type: Prospect

ARDF no. MC040

Latitude: 61.709 Quadrangle: MC C-8

Longitude: 143.85

Location description and accuracy: 1,000 ft south of headwaters of Amy Creek, a tributary of Kotsina River. Best location: MacKevett and others, 1978, loco 10. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Pyrite

Gangue minerals:

Geologic description: Pyrite-bearing veins and altered zones, containing secondary copper minerals, in sedimentary rocks of the Permian Hasen Creek Formation, locally intruded by Triassic gabbro. Alteration: Oxidation of copper minerals (?) Workings/Exploration: Type of workings: surface. Grab samples (MacKevett, 1976) assayed as much as 1.5 ppm Ag and 2,000 ppm Cu. ' Age of mineralization:

Deposit model: Lode: vein

Deposit model num~er (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 163; MacKevett and others, 1978, loco 10. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/22/97 \~"

~ l\laska Resource Data File Page $4 Site name(s): Shower Gulch; Copper King; Keystone

Site Type: Prospect

ARDF no. MC041

Latitude: 61.727 Quadrangle: MC C-8

Longitude: 143.711

Location descdption and accuracy: , 3,000 ft downstream froni the headwaters of Shower Gulch, a tributary of Kotsina River. Best location: MacKevett and others, 1978, loco 7. Accurate within radius of 100 feet. Commodities: Main; Cu Other:

Ore minerals: Chalcocite, chalcopyrite, native Cu

Gangue minerals: Epidote, quartz

Geologic description: Native Cu, associated with epidote and chalcocite, in compact quartz stringers and lenses filling amygdules in Triassic Nikolai Greenstone. Sparsely disseminated native Cu and minor chalcopyrite ~lso occur in the greenstone. Mineralization restricted to upper amygdaloidal parts of flows that range from 5 to 25 feet thick.

Altera,tion:

Workings/Exploration: Type of workings: surface. Open-cuts. Age of mineraliza tion:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Mendenhall and Schrader, 1903; Mendenhall, 1905; Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 164; MacKevett and others, 1978, loco 7. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. .' Waska Resource Data File Page 55

Reporter affiliation: USGS

Last report date: 9/22/97 , ~aska Resource Data File Page 56 Site name(s): Unnamed

Site Type: Occurrence"

ARDF no. MC042

Latitude: 61.645 Quadrangle: MC C-8

Longitude: 143.877

Location description and accuracy: 1.2 mi northeast of Dixie Pass. Best location: MacKevett and others, 1978, loco 17. Accurate within radius of 100 feet. Commodities: Main: Pb, Zn Other: Ag

Ore minerals: Galena, sphalerite

Gangue minerals:

Geologic description: Altered zone about 2 m thick, containing sphalerite and galena, in Triassic Chitistone Limestone near fault contact with Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Type of workings: surface. Grab sample (MacKevett, 1976) assayed >5,000 ppm Mn, 15 ppm Ag, 70 ppm Cd, 20 ppm Mo, 3,000 ppm Pb, > 10,000 ppm Zn. Age of mineralization:

Deposit model: Lode: vein, shear zone Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1976, loco 165; MacKevett and others, 1978, loco 17. Primary reference: MacKevett, 1976

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/22/97 i.• ,ill: ...

~ Alaska Resource Data File Page 57

Site name(s): Lime Creek

Site Type: Prospect

ARDF no. MC043

Latitude: 61.692 Quadrangle: MC C-8

Longitude: 143.931

Location description and accuracy: On north bank of Lime Creek, 1.7 mi upstream from confluence of Lime Creek with Kotsina River. Best location: MacKevett and others, 1978, loco 13. Accurate within radius of 100 feet. . Commodities: Main: Cu other:

Ore minerals: Bornite, chalcopyrite

Gangue minerals: Calcite, epidote, quartz

Geologic description: Bornite and minor chalcopyrite in small lenses, disseminations, and quartz-calcite veins in Triassic Nikolai Greenstone near contact with Triassic Chitistone Limestone. Alteration:

Workings/Exploration: Type of workings: underground. Explored by two short adits. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: See also: Warner Prospect (MC044) References: Mendenhall, 1905; Moffit and Maddren, 1909; Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 167; MacKevett and others, 1978, loco 13.

Prim~ry reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 9/22/97 II

, :~laska Resource Data File Page 58 Site name(s): Warner

Site Type: Prospect

ARDF no. MC044

Latitude: 61.708 Quadrangle: MC C-8

Longitude: 143.959

Location description and accuracy: On west bank of Lime Creek, 1,000 ft upstream from confluence of Lime Creek with Kotsina River. Best location: MacKevett and others, 1978, loco 8. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag

Ore minerals: Bornite, chalcopyrite, malachite

Gangue minerals: Calcite, quartz

Geologic description: Minor amounts of bornite, chalcopyrite and malachite in brecciated quartz-calcite vein about 1 m thick in Triassic Nikolai Greenstone near contact with Triassic Chitistone Limestone. Alteration:

Workings/Exploration: Type of workings: underground. Explored by a short adit. Grab sample (MacKevett, 1976) assayed 5 ppm Ag and 20,000 ppm Cu. Age of mineralization:

Deposit model: Basaltic Cu Deposit model num6er (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Mendenhall, 1905; Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 169; MacKevett and others, 1978, loco 8. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. , ~aska Resource Data File Page 59

Reporter affiliation: USGS

Last report date: 3/22/97 , ~aska Resource Data File Page 60 Site name(s): Unnamed

Site Type: Prospect

ARDF no. MC045

Latitude: 61.718 Quadrangle: MC C-8

Longitude: 143.869

Location description and accuracy: South side of Kotsina River, 2,500 ft downstream from confluence of Amy Cree"\< with Kotsina River. Best location: MacKevett and others, 1978, loco 6. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcopyrite

Gangue minerals: Pyrite

Geologic description: Several pyrite and chalcopyrite-bearing veins less than 30 cm thick in gabbro and felsic dikes. Gabbro is interpreted. as feeder dikes for the Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Type of workings: underground. Explored by several short adUs. Selected samples (MacKevett, 1976) assayed as much as: 3 ppm Ag, 1,000 ppm Cu, 20 ppm Mo. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: See also: unnamed occurrence no. 171 in MacKevett (1976). References: Moffit and Maddren, 1909; Moffit and Mertie, 1923; MacKevett, 1976, loco 170; MacKevett and others, 1978, loco 6. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H. , Waska Resource Data File Page 61

Reporter affiliation: USGS

Last report date: 9/22/97 l.~'

~ l\laska Resource Data File Page 62

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC046

Latitude: 61.719 Quadrangle: MC C-8

Longitude: 143.921

Location description and accuracy: North side of Kotsina River, 1.6 mi upstream from confluence of Rock Creek with Kotsina River. Best location: MacKevettand others, 1978, loco 5. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, native copper

Gangue minerals:

Geologic description: Sparsely distributed native Cu and chalcocite in amygdaloidal Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: None. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; MacKevett, 1976, loco 171; MacKevett and others, 1978, loc.5. Pririiary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/27/97 :~laska Resource Data File Page 63

Site naroe(s): Copper King

Site Type: Prospect

ARDF no. MC047

Latitude: 61.764 Quadrangle: MC D-3

Longitude: 142.006

Location description and accuracy: 2,000 ft south of toe of Middle Fork Glacier, at an elevation of 5,800 ft. Best location: MacKevett, 1976, loc.172. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Native Cu

Gafigueminerals: Calcite, prehnife, zeolite minerals

Geologic description: Native Cu in 6 ft thick zone of amygdaloidal basalt in the Triassic Nikolai Greenstone. Copper is intergrown with prehnite, calcite and zeolites. Alteration:

Workings/Exploration: Explored by two open cuts and 2 short adits. Type of workings: surface and underground. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Brooks, 1911; Capps, 1916; Berg and Cobb, 1967; Knaebel, 1970; MacKevett, 1976, loco 172. Primary reference: Capps, 1916

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/27/97 ·Naska Resource Data File Page 64

Site name(s): Surprise Crc;ek; Laddie; Sheehan; Hubbard

Site Type: Prospect

ARDF no. MC048

Latitude: 61. 741 Quadrangle: MC C-8

Longitude: 143.811

Location description and accuracy: Spur of land between Sunshine Creek and Surprise Creek, both tributaries of Kotsina River. Includes several old prospects on Surprise and Sunshine Creeks. Best location: MacKevett and others, 1978, loco 4. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite, chalcopyrite

Gangue minerals: Calcite, pyrite, quartz

Geologic description: Quartz-calcite veins, containing chalcocite,bornite and chalcopyrite, in faulted Nikolai Greenstone near a large Jurassic granodiorite pluton. Alteration:

Workings/Exploration: Type of workings: surface and underground. Explored by open cuts and a few short adits. Age of mineralization:

Deposit model: Lode: vein, shear zone Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 173; MacKevett and others, 1978, loc'. 4. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L.,Richter, D.H. ~Iaska Resource Data File Page 65

Reporter affiliation: USGS

Last report date: 10/27/97 "

~laska Resource Data File Page 66

Site name(s): Silver Star

Site Type: Mine

ARDF no. MC049

Latitude: 61.737 Quadrangle: MC C-8

Longitude: 143.904

Location, description and accuracy: 1,000 ft east-southeast of BM Vesna, north of Kotsina River. Best location: MacKevett and others, 1978, loco 2. Accurate within radius of 100 feet. Commodities: Main: Ag Other: Bi, Cu, Pb, Sb, Zn

Ore minerals: Argentiferous tetrahedrite, galena, sphalerite

Gangue minerals:

Geologic description: Thin quartz veins, containing argentiferous tetrahedrite, and subordinate galena, sphalerite and Cu-minerals in Triassic Nikolai Greenstone near contact of Jurassic granodiorite pluton. Alteration:

Workings/E8:ploration: , , Type of workings: surface and underground. Workings consist of two adits and open cuts. Assays showed 25 to 700 oz/ton Ag and 1 to 32 percent CUi bismuth is a constituent of ore (Moffit and Mertie, 1923). Age of mineralization:

Deposit model: Lode: vein Deposit model number (After C08: and Singer, 1986 or Bliss, 1992):

Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments: Active as recently as 1976. References: Moffit and Mertie, 1923; Moffit,1938; Berg and Cobb, 1967; MacKevett, 1976, loco 176; MacKevett and others, 1978, loco 2. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. .. laska Resource Data File Page 67

Reporter affiliation: USGS

Last report date: 10/28/97 .J , ~laska Resource Data File Page 68

Site name(s): Lost Cabin Extension

Site Type: Prospect

ARDF no. MCOSO

Latitude: 61.731 Quadrangle: MC C-8

Longitude: 143.984

Location description and accuracy: 2.S mi west-southwest of BM Vesna, north of Kluvesna River. Best location: MacKevett and others, 1978, loco 1. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite, chalcopyrite.

Gangue minerals:

Geologic description: Chalcocite, bornite, and chalcopyrite sparsely disseminated in Triassic Nikolai Greenstone. Alteration:

Workings I Exploration: Type of workings: surface and underground. Explored by 4 adits and several open cuts. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: .

References: Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 177; MacKevett and others, 1978, loc.1. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/29/97 , ~laska Resource Data File Page 69

Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC051

Latitude: 61.742 Quadrangle: MC C-8

Longitude: 143.864

Location description and accuracy: 2,000 ft south of Granite Peak summit. Best location: MacKevett and others, 1978, loc.3. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag, Au, Mo

Ore minerals: Chalcopyrite

Ga-ngue minerals: Quartz

Geologic description: A porphyry-type deposit containing pyrite and chalcopyrite-bearing quartz veinlets and disseminated sulfides in a Jurassic granodiorite pluton. Alteration:

Workings/Exploration: None. Assays (MacKevett, 1976) showed as much as 0.1 ppm Au(MJ, 2 ppm Ag, 5,000 ppm Cu, 70 ppm Mo, 100 ppm Sb and> 5,000 ppm Ba. Age of mineralization: Jurassic? Deposit model: Porphyry Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 17 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: See also: London and Cape prospect (MC002) References: MacKevett, 1976, loco 178; MacKevett and others, 1978, loco 3. Primary reference: MacKevett, 1976

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/29/97 .' ~laska Resource Data File Page 70

Site name(s): Mineral Creek

Site 1'ype: Prospect

ARDF no. MC052

Latitude: 61.753 Quadrangle: MC D-8

Longitude: 143.903

Location description and accuracy: 1 mile up Mineral Creek from confluence of Mineral Creek with Kluvesna River. Best location: MacKevett, 1976, loco 179. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other: Ag, Au

Ore minerals: Chalcocite, chalcopyrite

Gangue minerals: Quartz

Geologic description: Quartz veins up to 50 cm thick, containing pyrite, chalcopyrite and minor chalcocite, in Permian argillite and Jurassic granodiorite. Alteration:

Workings/Exploration: Type of workings: surface. Old assays reported about 3 oz/ton each of Au and Ag (Moffit and Mertie, 1923). Age of mineralization:

Deposit model: Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 19~2):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; Berg and Cobb, 1967; MacKevett, 1976, loco 179. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/29/97 , "-Iaska Resource Data File Page 71 Site name(s): Good Enough

Site Type: Prospect

ARDF no. MC053

Latitude: 61.771 Quadrangle: MC D-8

Longitude: 143.936

Location description and accuracy: 1 mi southeast from Scotty Peak summit. Best location: MacKevett, 1976, loco 180. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Azurite, chalcocite, chalcopyrite, malacll.ite, native Cu

Gangue minerals:

Geologic description: Chalcocite, malachite and azurite in veins and native Cu and chalcopyrite in amygdules in Triassic Nikolai Greenstone. Alteration: Oxidation of Cu minerals Workings/Exploration: Type of workings: underground. Two adits. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Mertie, 1923; MacKevett, 1976, loco 180. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D:H.

Reporter affiliation: USGS

Last report date: 10/29/97 , "-laska Resource Data File Page 72 Site name(s): Homestake and New Home

Site Type: Prospect

ARDF no. MC054

Latitude: 61. 794 Quadrangle: MC D-8

Longitude: 143.942

Location description and accuracy: 1 mi north-northeast from Scotty Peak summit, west of umiamed tributary of Fall Creek. Best location: MacKevett, 1976, loco 181. Accurate within radius pf 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite, cuprite, native Cu, tenorite

Gangue minerals:

Geologic description: Mainly amygdaloidal dep'osits in Triassic Nikolai Greenstone containing native Cu, cuprite, and tenorite; also thin veins carrying chalcocite, bornite and secondary copper minerals. Alteration: Oxidation of Cu minerals. Workings/Exploration: Type of workings: surface and underground. Short adits and surface cuts on several old claims. Age of mineralization:

Deposit model: Basaltic Cu . Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Mendenhall, 1905; Moffit and Maddren, 1909; Moffit and Mertie, 1923; MacKevett, 1976, loco 181. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L, Richter, D.H .. , ~aska Resource Data File Page 73

Reporter affiliation: USGS

Last report date: 10/30/97 , ~aska Resource Data File Page 74 Site name(s): Hidden Treasure

Site Type: Prospect

ARDF no. MC055

Latitude: 61.801 Quadrangle: MC D-8

Longitude: 143.88

Location description and accuracy: In 5,700 ft elevation saddle, between Fall Creek and Kluvesna Glacier .. Best location: MacKevett, 1976, loco 182. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, chalcocite, native Cu

Gangue minerals:

Geologic description: . Bornite and chalcocite in thin veins, and native Cu and chalcocite in amygdules, in Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: A short adit and surface open cuts. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments: One of many failed attempts to develop a native Cu lode. References: Mendenhall, 1905; Moffit and Maddren, 1909; Moffit and Mertie, 1923; MacKevett, 1976, loco 182. Primary reference: Moffit and Mertie, 1923

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/30/97 , ~aska Resource Data File Page 75 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC056

Latitude: 61.945 Quadrangle: MC D-l

Longitude: 141.038

Location description and accuracy: 1.75 mi up Ptarmigan Creek from where Ptarmigan Creek enters Beaver Creek. Best location: MacKevett, 1976, loco 185. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcopyrite

Gangue minerals: Pyrite

Geologic description: Pyrite and minor chalcopyrite disseminated in Jura-Cretaceous argillite and a small Triassic (?) gabbro mass near a fault. Alteration:

Workings/Exploration: None Age of mineralization:

Deposit model: Lode: disseminated Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Knaebel, 1970; MacKevett, 1976, loco 185. Primary reference: Knaebel, 1970

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/31/97 "

~laska Resource Data File Page 76 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MCOS7

Latitude: 61.963 Quadrangle: MC D-1

Longitude: 141.036

Location description and accuracy: Confluence of Ptarmigan Creek with Beaver Creek. Best location: MacKevett, 1976, loco 186. Accurate within radius of 1,000 feet. Commodities: Main: Au Other:

Ore minerals: Gold

Gangue minerals:

Geologic description: Placer gold occurrence, no other data. Alteration:

Workings IExplora tion: Type of workings: surface Age of mineralization:

Deposit model: Placer Au Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 39a Production: Undet. Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett, 1976, loco 186. Primary reference: MacKevett, 1976

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/31/97 ~aska Resource Data File Page 77

Site name(s): Colorado; Wiley

Site Type: Prospect

ARDF no. MC058

Latitude: 61.966 Quadrangle: MC D-1

Longitude: 141.063

Location description and accuracy: On south side of Beaver Creek, 1.2 mi upstream from confluence of Ptarmigan Creek with Beaver Creek. Best location: MacKevett, 1976, loco 187. Accurate within radius of 1,000 feet. . Commodities: Main: Au, Cu Other:

Ore minerals: Chalcopyrite, pyrite, pyrrhotite

Gangue minerals: Calcite, quartz

Geologic description: Small massive sulfide body in Triassic (?) gabbro surrounded by surficial deposits. Probably related to nearby Cretaceous granodiorite pluton. Alteration:

Workings/Exploration: Explored by a short adit. Age of mineralization: Cretaceous? Deposit model: Lode: massive, contact metasomatic Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Knopf, 1910; Moffit, 1943; Berg and Cobb, 1967; Knaebel, 1970; MacKevett, 1976, loco 187. Primary reference: Moffit and Knopf, 1910

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/31/97 ,.~:. .'

~Iaska Resource Data File Page 78 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC059

Latitude: 61.984 Quadrangle: MC D-l

Longitude: 141.097

Location description and accuracy: On north side 'of Beaver Creek, 2.6 mi upstream from confluence of Ptarmigan Creek with Beaver Creek. Best location: MacKevett, 1976, loco 188. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcopyrite

Gangue minerals: Pyrite

Geologic description: Pyrite and chalcopyrite disseminations and veinlets in Cretaceous granodiorite and in hornfelsed pendants in the granodiorite. Mineralized area, which includes this deposit and a number of nearby smaller occurrences, is near a shear zone. Alteration:

Workings/Exploration: None Age of mineralization: Cretaceous? Deposit model: Porphyry Cu? Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 17? Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Knaebel,1970; MacKevett, 1976, loco 188. Primary reference: Knaebel, 1970

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/31/97 ,~ Alaska Resource Data File Page 79

Site name(s): Harrais

Site Type: Prospect

ARDF no. MC060

Latitude: 61.028 Quadrangle: MC A-2

Longitude: 141.622

Location description and accuracy: 1 mi north of toe of Chitina Glacier, at midpoint of unnamed tributary of Chitina River. Best location: MacKevett, 1976, loco 2. Accurate within radius of 1,000 feet. Commodities: Main: Cu Other: Ag, Pb, Zn

Ore minerals: Azurite, bornite, chalcopyrite, galena, malachite, sphalerite

Gangue minerals:

Geologic description: Small, sporadically distributed pods and disseminations of chalcopyrite, galena, sphalerite, bornite, pyrite, silver, malachite and azurite. Localized in shear zones mainly in Permian marble. Alteration:

Workings/Exploration: Several short drifts and surface workings. Assay of massive sulfide pod showed: 4.78 percent Cu, 6.53 percent Pb, 13.15 percent Zn (Seitz, 1963). Age of mineralization:

Deposit model: Lode: massive, disseminated. Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Seitz, 1963; Berg and Cobb, 1967; MacKevett, 1976, loco 2. Primary reference: Seitz, 1963

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 10/31/97 ... . ~laska Resource Data File Page 80

Site name(s): Lucky Girl; Bremner Mining Company

Site Type: Mine

ARDF no. MC061

Latitude: 61.053 Quadrangle: MC A-7

Longitude: 143.42

Location description and accuracy: Approximately 1,400 ft north of headwaters of Golconda Creek. Best location: MacKevett, 1976, loco 23. Accurate within radius of 1,000 feet. Mislabelled as Yellow Band Mine on McCarthy A-7 topographic quadrangle map. Commodities: Main: Au Other:

Ore minerals: Native Au

Gangue minerals: Quartz

Geologic description: Sparsely distributed gold in a series of subparallel quartz veins from a few cm to 1 m thick in Jurassic-Cretaceous Valdez Group metasedimentary rocks cut by quartz monzonite porphyry dikes and a north-trending system of vertical faults. Alteration:

Workings/Exploration: More than 600 m of underground workings on two levels with 30 m of vertical separation. Mine had 50 tpd mill. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Yes: small Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit, 1914; Moffit, 1937; Berg and Cobb, 1967; MacKevett, 1976, loco 23. Primary reference: Moffit, 1914

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/3/97 , ,1, Maska Resource Data File Page 81

Site name(s): Grand Prize; Bremner Mining Company

Site Type: Mine

ARDF n,o. MC062

Latitude: 61.059 Quadrangle: MC A-7

Longitude: 143.423

Location description and accuracy: Approximately 3,400 ft north of headwaters of Golconda Creek. Mine workings are 2,000 ft north of the Lucky Girl Mine (MC061). Best location: MacKevett, 1976, lac. 24. Accurate within radius of 1000 feet. Commodities: Main: Au Other:

Ore minerals: Native Au

Gangue minerals:

Geologic description: Gold occurs in gouge and in comminuted vein material along walls of felsic dike that intrudes Jurassic-Cretaceous Valdez Group metasedimentary rocks. Alteration:

Workings/Exploration: About 100 m underground workings. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Yes: small Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit, 1914; Moffit, 1937; Berg and Cobb', 1967; MacKevett, 1976, lac. 24. Primary reference: Moffit, 1914

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/3/97 ~laska Resource Data File Page 82 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC063

Latitude: 61.272 Quadrangle: Me BA

Longitude: 142.186

Location description and accuracy: On west bank of Canyon Creek, 3.1 mi upstream from confluence of Cave Creek and Canyon Creek. Best location: MacKevett a.nd Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Ag, Au, Cu Other:

Ore minerals:

Gangue minerals:

Geologic description: Cu-bearing vein as much as 1 m tbick in 5-m-thick altered zone in Triassic Nikolai Greenstone. Alteration:

Workings /Explora tion: No workings. Grab sample (MaeKevett, 1976) assayed 50 ppm Ag, 1.3 ppm Au, and >20,000 ppm Cu. Age of mineralization:

Depo.sit model: . Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968, loco 108; MacKevett and Smith, 1972; MacKevett, 1976, loco 36. Primary·reference: MacKevett aand Smith, 1968

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11 /4/97 , ~laska Resource Data File Page 83 Site name(s): Young Creek; Calamity Gulch

Site Type: Mine

ARDF no. MC064

Latitude: 61.225 Quadrangle: MC A-5

Longitude: 142.529

Location description and accuracy: Coordinates are for confluence of Young Creek and Calamity Gulch, north of MacColl Ridge. Most mining was near mouth of Calamity Gulch. Best location: MacKevett, 1973. Accurate within radius of 100 feet. Commodities: Main: Au Other: Cu

Ore minerals: Native copper, native gold

Gangue minerals:

Geologic description: Placer gold deposits along Young Creek and tributaries, especially Calamity Gulch. Mined in early 1900's. Alteration:

Workings/Exploration: Surface workings. Age of mineralization:

Deposit model: Placer Au Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 39a Production: Yes: small Status: Inactive

Production notes: Yielded a small amount of gold early in the 20th century. Reserves:

Additional comments: Minor Au producer. Cu nuggets found in creek were probably derived from Nikolai Greenstone References: Moffit and Capps, 1911; Brooks, 1912; Brooks, 1915; Brooks and Capps, 1924; Berg and Cobb, 1967; MacKevett, 1973; MacKevett, 1976, loco 37. Primary reference: Moffit and Capps, 1911

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11 /4/97 ;l\

~laska Resource Data File Page 84 Site name(s): Chititu Creek; Rex Creek; White Creek; Bligh Gulch; Jolly Gulch

Site Type: Mine

ARDF no. MC065

Latitude: 61.294 Quadrangle: MC B-5

Longitude: 142.568

Location description and accuracy: , 'Chititu Camp' at junction of Chititu, Rex, and White Creeks and Bligh Gulch. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Au Other: Ag, Cu, Pb, Sb

Ore minerals: Galena, native Ag, native Au, native Cu, stibnite

Gangue minerals:

Geologic description: Bench and stream placers on Chititu Creek and its tributaries. Richest stream placers were reconcentrated from benches. ' Alteration:

Workings/Exploration: Surface placers; small-scale hydraulic operations. Age of mineralization:

Deposit model: Placer: bench, stream Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 39a . Production: Yes: small Status: Inactive

Production notes: Accounted for more than half of the estimated 143,000 oz. Au produced from the Nizina District (MacKevett, 1976). Minor activity in 1976. Reserves:

Additional comments: Major producer of gold in the Nizina District.. References: Moffit and Capps, 1911; Brooks, 1915; Brooks and Capps, 1924; Koschmann and Bergendahl, 1968; Cobb, .1973, B 1374; MacKevett, 1974; MacKevett, 1976, loco 39. Primary reference: Moffit and Capps, 1911

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. , ~asl(3 Resource Data File Page 85

Reporter affiliation: USGS

Last report date: 11/5/97 ~laska Resource Data File Page 86 Site name(s): Unnamed

Site Type: Prospect

ARDF no. MC066

Latitude: 61.327 Quadrangle: MC B-3

Longitude: 141.985

Location description and accuracy: Southern flank of Celeno Peak, at 9,200 ft elevation. Best location: MacKevett, 1976, loco 44. Accurate within radius of 1 mile. Commodities: Main: Mo Other:

Ore minerals: Molybdenite

Gangue minerals:

Geologic description: Molybdenite in quartz veins that cut Tertiary granodiorite. Veins up to 1 m thick, but typically are less than 20 em thick. Alteration:

Workings/Exploration: Type of workings: surface. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Smith, 1942; Berg and Cobb, 1967; MacKevett, 1976, loco 44. Primary reference: Smith, 1942

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/5/97 j ~: .. 'p

~laska Resource Data File Page 87 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC067

Latitude: 61.337 Quadrangle: MC B-4

Longitude: 142.175

Location description and accuracy: Top of peak, 2 mi south of Twaharpies Glacier, surrounded by glaciers (near the Park/ Preserve Boundary). Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: eu Other:

Ore minerals: Chalcocite, malachite.

Gangue minerals:

Geologic description: Fault zone, 2 m wide, in Triassic Nikolai Greenstone contains thin chalcocite- and malachite-bearing veins. Alteration: Oxidation of Cu minerals. Workings/Exploration: No workings. Grab sample (MacKevett , 1976) assayed 7 ppm Ag, 1,000 ppm As, and >20,000 ppm Cu. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968, loco 96; MacKevett and Smith, 1972; MacKevett, 1976, IQc.46. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/6/97 "

~laska Re~ource Data File Page 88 Site name(s): Copper Creek; Radar Gulch; Seattle Gulch; Idaho Gulch

Site Type: Mine

ARDF no. MC068

Latitude: 61.346 Quadrangle: MC B-4

Longitude: 142.428

Location description and accuracy: On Copper Creek between Seattle and Idaho Gulches. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Au Other: Cu

Ore minerals: Native Au, native Cu

Gangue minerals:

Geologic description: Modern stream placers. All pre-glacial unconsolidated deposits have been removed by glacier. Copper Creek follows fault contact between Triassic limestone and greenstone to the north and younger Mesozoic sedimentary rocks cut by Tertiary hypabyssal rocks to the south. Alteration:

Workings/Exploration: Type of workings: surface Age of mineralization:

Deposit model: Placer: stream Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 39a Production: Yes: small Status: Inactive

Production notes:

Reserves:

Additional comments: Copper Creek is actually the upper course of Dan Creek (MC009). It was not uncommon for Alaskan prospectors to call the upper and lower parts of the same Gt.:eek by different names. References: l\1offitandCapps, 1911; Brooks, 1915; MacKevett; 1970,B 1333; MacKevettand Smith, 1972; MacKevett, 1976, loco 49. Primary reference: Moffit and Capps, 1911

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H. il: )"'P',

:~laska Resource Data File Page 89

Reporter affiliation: USGS

Last report date: 11/6/97 " , ~aska' Resource Data File Page 90 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC069

Latitude: 61.343 Quadrangle: MC B-4

Longitude: 142.331

Location description and accuracy: 1 mile northwest of headwaters·of Eagle Creek:. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Sb Other: Au, W

Ore minerals: Stibnite

Gangue minerals: Calcite, quartz

Geologic description: A series of stibnite-bearing quartz-calcite veins up to 25 em thick in Triassic Nizina Limestone. Alteration:

Workings/Exploration: No workings. Grab samples assayed as much as: 1.2 ppm Au, 700 ppm As, >10,000 ppm Sb,and 7,000 ppm W (MacKevett, 1976). Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968 locs. 62, 63, 65, 66; MacKevett, 1970, B 1333; MacKevett and Smith, 1972; MacKevett, 1976, loco 50. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L., Richter,D.H.

Reporter affiliation: USGS

Last report date: 11/7/97 , ~aska Resource Data File Page 91 Site name(s): Unnamed

Site Type: Prospect

ARDF no. MC070

Latitude: 61.373 Quadrangle: MC B-4

Longitude: 142.435

Location description and accuracy: Near headwaters of Dan Creek - 4,000 ft east-southeast of Nikolai Butte. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Conunodities: Main: Ag, Cu Other:

Ore minerals: Chalcocite, chalcopyrite, covellite, malachite

Gangue minerals:

Geologic description: Scattered veins up to 5 em wide along joints in Triassic Nikolai Greenstone contain chalcocite, pyrrhotite, covellite and malachite. Alteration: Oxidation of Cu minerals. Workings/Exploration: 15 ft adit. Grab sample assayed: 30 ppm Ag and >20,000 ppm Cu (MacKevett, 1976). Age of mineralization:

. Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968, loco 53; MacKevett and Smith, 1972; MacKevett, 1976, loco 54. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/7/97 ,t ."

,~ j\laska Resource Data File Page 92

Site name(s): Taylor

Site Type: Prospect

ARDF no. MC071

Latitude: 61.312 Quadrangle: MC B-4

Longitude: 142.479

Location description and accuracy: 3,600 ft southwest of headwaters of Rex Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 1,000 feet. Commodities: Main: Au, Cu Other:

Ore minerals: Chalcopyrite, native Au (?)

Gangue minerals: Quartz

Geologic description: Irregular sulfide-bearing pods and thin Au-bearing quartz veins along contact between Tertiary felsic pluton, that contains disseminated pyrite, and hornfelsed Cretaceous sedimentary rocks. Alteration:

Workings/Exploration: Surface workings. Grab samples assayed: 0.02-15.4 ppm Au, 0.5-5 ppm Ag, and 50- 2,000 ppm Cu (MacKevett, 1976)." Age of mineralization:

Deposit model: Lode: vein, massive, disseminated Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968, samples 71-79; MacKevett, 1970, B 1333; MacKevett and Smith, 1972; MacKevett, 1976, loco 55. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L.,Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/7/97 Alaska Resource Data File Page 93

Site name(s): Crumb Gulch

Site Type: Prospect

ARDF no. MC072

Latitude: 61.351 Quadrangle: MC B-5

Longitude: 142.524

Location description and accuracy: Several prospects occur within 1/2 mile of location given--all around base of Williams Peak. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Au, Sb Other: Cu

Ore minerals: Chalcopyrite, native Au, realgar, stibnite

Gangue minerals:

Geologic description: Veins up to 30 cm thick in shear zone cutting hornfelsed Cretaceous sedimentary rocks near Tertiary granodiorite pluton. Veins contain gold, stibnite, realgar, pyrite and minor to trace chalcopyrite. A few veins in granodiorite contain masses of stibnite more than 1 m long and as much as 12 cm wide. Alteration:

Workings/Exploration: Explored by two short adits and surface workings. Grab samples assayed as high as: >10,000 ppm Sb, 66 ppm Au, 15 ppm Ag (MacKevett, 1976). Age of mineralization:

Deposit model: Lode: vein, shear zone. Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Berg and Cobb, 1967; MacKevett and Smith, 1968, samples 13-19; MacKevett, 1974; MacKevett, 1976, loco 56. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H. ~\

I ~laska Resource Data File Page 94

Reporter affiliation: USGS

Last report date: 11/7/97 .,,,. IIi:..

, ~Iaska Resource Data File Page 95 Site name(s): Regal

Site Type: Mine

ARDF no. MC073

Latitude: 61.555 Quadrangle: MC C-6

Longitude: 142.972

Location description and accuracy: 1 mile south of Donoho Peak summit. Best location: MacKevett, 1972. Accurate within radius of 100 feet. Commodities: Main: eu Other:

Ore minerals: Bornite, chalcocite, malachite

Gangue minerals:

Geologic description: Chiefly malachite-rich coatings, veins and disseminations in basal part of Triassic Chitistone Limestone. Alteration: Oxidation of Cu minerals. Workings/Exploration: Developed by 3 inclines and other underground workings, only 760 ft of which were accessible in 1943. Also some prospect pits in nearby Nikolai Greenstone. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Miller, 1946; MacKevett and Radtke, 1966; Berg and Cobb, 1967; MacKevett, 1972; MacKevett, 1976, loco -97. Primary reference: Miller, 1946

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/14/97 ~, \ Y·- 0) .1

~laska Resource Data File Page 96 Site name(s): Nikolai Butte

Site Type: Prospect

ARDF no. MC074

Latitude: 61.374 Quadrangle: MC BA

Longitude: 142.459

Location description and accuracy: Southern flank of Nikolai Butte. Several prospects occur within 1/4 mile of coordinates. Best location: MacKevett and Smith, 1972. Locations of individual prospects accurate within radius of 100 feet; Commodities: Main: Ag, Cu, Pb, Zn Other:

Ore minerals: Unspecified secondary copper and base metal minerals

Gangue minerals:

Geologic description: Small prospects on narrow veins in steep faults cutting Triassic Nikolai Greenstone and Triassic Chitistone Limestone and on copper-stained zones along the Greenstone / Limestone con tact. Alteration:

Workings/Exploration: Type of workings: surface. Grab samples assayed >20,000 ppm Cu, and as much as 10 ppm Ag, 15,000 ppm Pb, and 10,000 ppm Zn (MacKevett, 1976). Age of minerali2:ation:

Deposit model: Basaltic Cu ? Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 ? Produotion: No Status: Inactive

Production notes:

Reserves:

Additional comments: Probably a Kennicott-type deposit but of interest because of high lead and zinc values. References: Miller, 1946; MacKevett and Smith, 1968, samples 50-52; MacKevett and Smith, 1972; MacKevett, 1976, loco 58. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H. · ~Iaska Resource Data File Page 97

Reporter affiliation: USGS

Last report date: 11/10/97 OJ , ~aska Resource Data File Page 98

Site name(s): O'Hara

Site Type: Prospect

ARDF no. MC075

Latitude: 61.336 Quadrangle: MC B-8

Longitude: 143.843

Location description and accuracy: Northwest flank of Nelson Mountain, 4,000 ft from summit. Best location: MacKevett, 1976, loco 59. Accurate within radius of 1,000 feet. Commodities: Main: Ag, Pb, Zn Other: Cd

Ore minerals: Galena, sphalerite.

Gangue minerals:

Geologic description: Veins of galena, sphalerite, pyrite, marcasite, and pyrrhotite, up to 20 em thick, in Permian marble t:ontaining disseminated tourmaline, pyrite, pyrrhotite and sphalerite. Alteration:

Workings / Exploration: Explored by two short adits driven about 1940. Age of mineralization:

Deposit model: Lode: vein, disseminated. Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Berg and Cobb, 1967; MacKevett, 1976, loco 59. Primary reference: Berg and Cobb, 1967

Reporter: Leonard, K.R., Elliott, R.L.,Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/10/97 \~"y.,'l" , ~aska Resource Data File Page 99

Site name(s): Radovan Group: Low Contact claims

Site Type: Prospect

ARDF no. MC076

Latitude: 61.402 Quadrangle: Me B-4

Longitude: 142.371

Location description and accuracy: Near top of Radovan Glacier. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag, As, Sb

Ore minerals: Chalcocite, chalcopyrite, realgar, stibnite

Gangue minerals: Calcite, dolomite, epidote, marcasite, pyrite, quartz.

Geologic description: Brecciated fault zone, separating Triassic Nikolai Greenstone and Chitistone Limestone, contains sporadically distributed chalcocite, chalcopyrite, pyrite, marcasite, and realgar, and subordinate orpiment and stibnite. In one outcrop, veins of chalcocite 1 to 6 in wide occur over a surface area of 50 sq. ft. Fault zone stikes N 25 E,dips 70-75 SE, and has a vertical displacement of 1000 ft. Alteration:

Workings/Exploration: Explored by surface trenches and 2 short adits. Age of mineralization:

Deposit model: Basaltic Cu ? , Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 ? Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments: Prospect active in 1976. See also: Radovan: Greenstone claim prospect (MC078) which occurs along same fault zone. References: Miller, 1946; Sainsbury, 1952; Berg and Cobb, 1967; MacKevett, 1970, B 1333; MacKevett and Smith, 1972; MacKevett, 1976, loco 65. Primary reference: Sainsbury, 1952

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. , ~laska Resource Data File Page 100

Reporter affiliation: USGS

Last report date: 11/10/97 , ~ Alaska Resource Data File Page 101 Site name(s): Radovan Group: Binocular claims

Site Type: Prospect

ARDF no. MC077

Latitude: 61.411 Quadrangle: MC B-4

Longitude: 142.381

Location description and accuracy: Near top of ridge west of Radovan Glacier. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Ag, Cu Other:

Ore minerals: Bornite?, chalcopyrite, chalcocite

Gangue minerals:

Geologic description: Massive lenses, thin veins and disseminations of pyrite, marcasite, chalcocite, bornite?, and chalcopyrite in dolomitic Triassic Chitistone Limestone. Alteration:

Workings/Exploration: Type of workings: surface and underground. Ore runs 7.0-10.0 percent Cu (ADGGS , 1983). Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Active

Production notes:

Reserves:

Additional comments: Area shows potential for large, high-grade deposits. Normal fault striking N 45 W, dipping 70 S runs about 400 ft N of prospect. References: Miller, 1946; Berg and Cobb, 1967; MacKevett and Smith, 1972; MacKevett, 1976, l?~. 66; ADGGS, 1983; ADGGS, 1984. Primary reference: Miller, 1946

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/10/97 I IU/,I

I ~laska Resource Data File Page 102

Site name(s): Radovan Group: Greenstone claims

; Site Type: Prospect

ARDF no. MC078

Latitude: 61.425 Quadrangle: MC B-4

Longitude: 142.35

Location description and accuracy: On slope east of lower portion of Rl'tdovl'tn Glacier. Best location: MacKevett I'tnd Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Ag, Cu Other:

Ore minerals: Bornite, chalcocite, covellite, cuprite, enargite, malachite, native Cu

Gangue minerals: Calcite, dolomite, epidote, quartz

Geologic description: Chalcocite-rich vein within a major normal fault zone in Triassic Nikolai Greenstone. Fault zone strikes N 15 to 26 E, and dips 73 SE. Vein is 1 to 8 in wide over 150 ft slope distance, widens to 4 ft over distance of 10-15 ft, then pinches out abruptly. Vein is located on same fault zone as Radovan: Low Contact prospect (MC076). Alteration:

Workings/Exploration: Explored by two short adits,. Three channel samples assayed 50 ppm Ag each. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 ' Production: Yes; small Status: 'Active

Production notes:

Reserves:

Additional comments: , See also: Radovan Low Contact prospect (MC076). Both Greenstone and Low Contact prospects are located on same major fault that strikes N 15 to 26 E, and dips 73 SE. References: Sainsbury, 1952; Berg and Cobb, 1967; MacKevett and Smith, 1968, samples 43- 49; MacKevett and Smith, 1972; MacKevett, 1976, loco 67. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. , ~aska Resource Data File Page 103

Reporter affiliation: USGS

Last report date: 11 /12/97 .1

~laska Resource Data Fiie Page 104 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC079

Latitude: 61.454 Quadrangle: MC B-4

Longitude: 142.281

Location description and accuracy: North side of small unnamed glacier, south of Toby Creek - a tributary of Chitistone Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Azurite, malachite

Gangue minerals:

Geologic description: Malachite- and azurite-bearing vein 0.5 to 1 m thick in fault that cuts Triassic Nikolai Greenstone. Alteration: Oxidation of Cu minerals. Workings/Exploration: . No workings. Grab sample assayed: 2 ppm Ag, 500 ppm As, 20,000 ppm Cu (MacKevett, 1976). Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968, loco 111; MacKevett and Smith, 1972; MacKevett, 1976, loco 70. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/12/97 \~... . ~laska Resource Data File Page 105

Site name(s): Snow Bird

Site Type: Prospect

ARDF no. MC080

Latitude: 61.395 Quadrangle: MC B-5

Longitude: 142.513

Location description and accuracy: 2,900 ft north-northeast of the headwaters of Boulder Creek - a tributary of Dan Creek. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Ag, Cu Other:

Ore minerals: Bornite, chalcocite, chalcopyrite

Gangue minerals: Calcite, pyrite, quartz

Geologic description: Quartz-calcite vein 0.5-1.5 ill thick containing bornite, chalcocite, chalcopyrite and pyrite, in Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Explored by two short adits. Sample of bornite-rich pod assayed: 50 ppm Ag (MacKevett.and Smith, 1968). Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit, 1918; Miller, 1946; Berg a:q.d Cobb, 1967; MacKevett and Smith, 1968, samples 9-12; MacKevett, 1974; MacKevett, 1976, loco 71. Primary reference: Moffit, 1918; MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/12/97 ., " .

~laska Resource Data File Page 106

Site name(s): Peavine

Site Type: Mine

ARDF no. MC081

Latitude: 61.447 Quadrangle: MC B-4

Longitude: 142.484

Location description and accuracy: 2,400 ft south of downstream end of Peavine Bar on the Chitistone River, Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Azurite, chalcocite, malachite

Gangue minerals:

Geologic description: Widespread malachite and azurite coatings and some chalcocite in brecciated fault zone that cuts both Triassic Chitistone Limestone and Triassic Nikolai Greenstone. Alteration: Oxidation of Cu minerals. Workings / Explora tion: Explored by short adit and surface workings. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Inactive

Production notes:

Reserves:

Additional comments: Peavine is most recently active (1970's) Cu mine in district. References: Moffit and Maddren, 1909; Miller, 1946; Berg and Cobb, 1967; MacKevett and Smith, 1968, loco 25; MacKevett and Smith, 1972; MacKevett, 1976, loco 73. Primary reference: Moffit and Maddren, 1909; MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/12/97 \~: . ~aska Resource Data File Page 107 Site name(s): Schultze

Site Type: Prospect

ARDF no. MC082

Latitude: 61.456 Quadrangle: MC B-5

Longitude: 142.642

Location description and accuracy: 3,000 ft north of the headwaters of Pack Gulch, a tributary of Nizina River. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Cu other:

Ore minerals: Chalcocite

Gangue minerals:

Geologic description: Small chalcocite-rich pod and chalcocite-bearing stringers in lower part of the Triassic Chitistone Limestone. Alteration:

Workings/Exploration: Explored by two short adits. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Berg and Cobb, 1967; MacKevett, 1974; MacKevett, 1976, lac. 74. Primary reference: MacKevett, 1974

Reporter: Leonard, KR., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11 /12/97 .. , W.aska Resource Data File Page 108

Site naroe(s): Porphyry Mountain

Site Type: Prospect

ARDF no. MC083

Latitude: 61.445 Quadrangle: MC B-5

Longitude: 142.833

Location description and accuracy: On western flank of Porphyry Mountain, 1.8 mi south of summit. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Au, Mo Other: Cu

Ore minerals: Chalcopyrite, molybdenite

Gangue minerals: Quartz

Geologic description: Discontinuous, irregular molybdenite- and minor chalcopyrite-bearing quartz vein up to 0.5 cm thick following f$.ult in Tertiary granodiorite pluton. Molybdenite localized along vein selvages. Alteration:

Workings I Exploration: About 120 m of underground workings. Channel and grab samples generally contained >2,000 ppm Mo and as much as 2.4 ppm Au and 100 ppm Cu (MacKevett and Smith, 1968). Age of mineralization:

Deposit model: Lode: vein. Deposit model num6er (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1968, samples 1-7; MacKevett, 1974; MacKevett, 1976, loco 77. Primary reference: MacKevett and Smith, 1968

Reporter: Leonard, K.R., Elliott, R.L.,Richter, D.H. ~aska Resource Data File Page 109

Reporter affiliation: USGS

Last report date: 11/12/97 ~aska Resource Data File Page 110

Site name(s): Golconda Creek

Site Type: Mine

ARDF no; MC084

Latitude: 61.006 Quadrangle: MC A-7

Longitude: 143.455

Location description and accuracy: Coordinates are for confluence of Golconda and Standard Creeks. Most activity was on Golconda Creek below Standard Creek. Golconda Creek is a tributary to the North Fork of the Bremner River in the Bering Glacier quadrangle. Best location: MacKevett, 1976, loco 8. Accurate within radius of 1,000 feet. Commodities: Main: Au Other:

Ore minerals: Native Au

Gangue minerals:

Geologic description: Shallow placer deposits, maximum 8 ft deep, in modem stream gravels. Older alluvial terraces are known to be auriferous. Alteration:

Workings/Exploration: Surface workings. Hand methods and small-scale hydraulic operations . . Age of mineralization:

Deposit model: Placer: stream, bench. Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 39a Production: Yes; small. Status: inactive

Production notes: Probably produced between 2000 and 3000 oz Au. Reserves:

Additional comments: Most important gold producing stream in the Bremner River area. References: Mendenhall, 1905; Moffit, 1912, B 520; Moffit, 1914; Moffit,1937; Cobb,1973; MacKevett, 1976, loco 8, Primary reference: Moffit, 1914

Reporter: Leonard, KR, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/12/97 , ~laska Resource Data File Page 111

Site name(s): Houghton Alaska

Site Type: Prospect

ARDF no. MC085

Latitude: 61.486 Quadrangle: MC B-4

Longitude: 142.354

,Location description and accuracy: Group of several prospects spread out over a 3/4 mi area. Prospects are on flank of mountain north of Chitistone River, 1.5 mi southwest of Contact Gulch. Includes several prospects within 1/2 mi of location given. Best location: MacKevett and Smith, 1972. Location of prospects accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals:

Gangue minerals:

Geologic description: Secondary Cu-minerals coating fractures along faults cutting Triassic Nikolai Greenstone near contact of overlying Triassic Chititstone Limestone. Alteration: Oxidation of Cu minerals. Workings/Exploration: Type of workings: surface. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 ' Production: No Status: Inactiv(:,!

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1909; Miller, 1946; MacKevett and Smith, 1972; MacKevett, 1976, loco 81. Primary reference: Miller, 1946

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/14/97 ,'I '. , ~aska Resource Data File Page 112

Site name(s): Contact Gulch

Site Type: Prospect

ARDF no. MC086

Latitude: 61.494 Quadrangle: MC BA

Longitude: 142.31

Location description and accuracy: Near mouth of Contact Gulch, a tributary of Chitistone River. Best location: MacKevett and Smith, 1972. Accurate within radius of 1000 feet. Commodities: Main: Cu Other:

Ore minerals: Bornite, malachite

Gangue minerals:

Geologic description: Scattered bornite-bearing veinlets and malachite-coated fractures in Triassic Nikolai Greenstone. Alteration:

Workings/Exploration: Numerous surface prospect pits. Age of mineralizaUon:

Deposit mOcIel: Basaltic Cu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Moffit and Maddren, 1908; Moffit and Maddren, 1909; Miller, 1946; Berg and Cobb, 1967; MacKevett and Smith, 1972; MacKevett, 1976, loco 82 Primary reference: Moffit and Maddren, 1908

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/14/97 <, \,~' , ~aska Resource Data File Page 113 Site name(s): Unnamed

Site Type: Occurrence

ARDF no. MC087

Latitude: 61.498 Quadrangle: MC B-4

Longitude: 142.273

Location description and accuracy: Two occurrences 1,000-1,200 ft upstream, on both sides of an unnamed tributary of Chitistone River. The unnamed tributary is 1.5 mi upstream from mouth of Toby Creek. Best location: MacKevett and Smith, 1972. Accurate within radius of 100 feet. Commodities: Main: Cu Other:

Ore minerals: Chalcocite, malachite

Gangue minerals:

Geologic description: Chalcocite and malachite bearing veinlets in lower part of Triassic Nikolai Greenstone. Alteration: Oxidation of Cu minerals. Workings/Exploration: No workings. Age of mineralization:

Deposit model: Lode: vein. Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: MacKevett and Smith, 1972; MacKevett, 1976, loco 83. Primary reference: MacKevett and Smith, 1972

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/14/97 '. , .lJ,aska Resource Data File Page 114

Site name(s): Green Butte

Site Type: Mine

ARDF no. MC088

Latitude: 61.489 Quadrangle: MC B-5

Longitude: 142.769

Location description and accuracy: Southwestern flank of Green Butte, at 4,000 ft elevation. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Ag, Cu Other:

Ore minerals: Azurite, bornite, chalcocite, covellite, malachite

Gangue minerals: Calcite, dolomite

Geologic description: Veinlike replacement lodes and cavity fillings forming discontinuous masses of chalcocite and other copper minerals up to 4 ft thick in lower part of Triassic Chitistone Limestone, near contact with underlying Triassic Nikolai Greenstone, which is separated from limestone by a thin bed of shale. Alteration:

Workings/Ex:ploration: About 11,000 ft of drifts and crosscuts on 8 levels, 1,500 ft of inclines and 2,500 ft of raises, winzes and stopes. In 1943, 500 ft level and lower levels were flooded and considerable portions of 100 ft and 400 ft levels caved. Age of mineralization:

Deposit model: Basaltic Cu Deposit model number (After Cox: and Singer, 1986 or Bliss, 1992): 23 Production: Yes; small Status: Inactive

Production notes: Reported to have produced about 1,500 tons of high-grade ore that contained about 1,200 pounds of copper and 10 ounces of silver per ton. Reserves:

Additional comments:

Refeiences: Miller, 1946; Berg and Cobb, 1967; MacKevett, 1974; MacKevett, 1976, loco 87. Primary reference: Miller, 1946

Reporter: Leonard, K.R., Elliott, R.L., Richter, D.H. , ~aska Resource Data File Page 115

Reporter affiliation: USGS

Last report date: 11/14/97 I ruaska Resource Data File Page 116

Site name(s): Tjosevig

Site Type: Prospect

ARDF no. MC089

Latitude: 61.499 Quadrangle: MC B-5

Longitude: 142.773

Location description and accuracy: Western flank of Green Butte, at 4,000 ft elevation. Best location: MacKevett, 1974. Accurate within radius of 100 feet. Commodities: Main: Cu Other: Ag

Ore minerals: Azurite, malachite

Gangue minerals:

Geologic description: Chiefly malachite and azurite deposits in lower part of the Triassic Chitistone Limestone. Alteration: Oxidation of Cu minerals. Workings/Exploration: Explored by a short adit, presently caved. Age of mineralization:

Deposit model: Basaltic eu Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 23 Production: No Status: Inactive

Production notes:

Reserves:

Additional comments:

References: Miller, 1946; Berg and Cobb, 1967; MacKevett, 1974; MacKevett, 1976, lac. 88. Primary reference: Miller, 1946

Reporter: Leonard, K.R., Elliott, R.L., Richter, DJ:!.

Reporter affiliation: USGS

Last report date: 11/14/97 Alaska Resource Data File Page 117 \ .' . Site name(s): Yellowband :, '.

Site Type: Mine

ARDF no. MC090

Latitude: 61.031 Quadrangle: Me A-7

Longitude: 143.413

Location description and accuracy: Midpoint of uppermost, unnamed, eastern tributary of Golconda Creek, in the Chugach Mountains. Best location: MacKevett, 1976, loco 9. Accurate within radius of 1,000 feet. Commodities: Main: Au Other:

Ore minerals: Native gold

Gangue minerals: Quartz

Geologic description: Several auriferous quartz veins, generally less than 25 cm thick, along walls of felsic dikes cutting Jurassic-Cretaceous Valdez Group sedimentary rocks. Alteration:

Workings/Exploration: Sloughed open cuts and a few hundred m of underground workings. Age of mineralization:

Deposit model: Lode: vein Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

Production: Yes; small Status: Inactive

Production notes: Produced about 750 oz of gold. Reserves:

Additional comments:

References: Moffit, 1937; Berg and Cobb, 1967; MacKevett, 1976, loco 9. Primary reference: Moffit, 1937 .

Reporter: Leonard, K.R, Elliott, RL., Richter, D.H.

Reporter affiliation: USGS

Last report date: 11/14/97 '0.

, ~aska Resource Data File Page 118

References Cited

Alaska Division of Geological and Geophysical Surveys, 1983, Alaska's Mineral Industry 1982: Alaska Division of Geological and Geophysical Surveys, Special Report 31, 63 p. Alaska Division of Geological and Geophysical Surveys, 1984, Alaska's Mineral Industry 1983: Alaska Division of Geological and Geophysical Surveys, Special Report 33, 56 p. Armstrong, A.K., and MacKevett, E.M., Jr., 1982, Stratigraphy and diagenetic history of the lower part of the Triassic Chitistone Limestone, Alaska: U.S. Geological Survey Professional Paper 1212-A, 26 p. Bateman, A.M., 1932, Notes on a Kennecott-type copper deposit, Glacier Creek, Alaska: Economic Geology, v. 27, no. 3, p. 297-306. Bateman, A.M., and McLaughlin, D.H., 1920, Geology of the ore deposits of Kennecott, Alaska: Economic Geology, v. 15, no. 1, p. 1-80. Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.

Bliss, J~D., ed., 1992, Developments in mineral deposit modeling: U.S. Geological Survey Bulletin 2004, 168 p. Brooks, A.H., 1911, The mining industry in 1910, in Mineral resources of Alaska: U.S. Geological Survey Bulletin 480, p. 21-42. Brooks, A.H., 1912, The mining industry in 1911, in Mineral resources of Alaska: U.S. Geological SurveyBulletin 520, p. 17-44. Brooks, A.H., 1915, The Alaska mining industry in 1914, in Mineral resources of Alaska: U.S. Geological Survey Bulletin 622, p. 15-68. Brooks, A.H., and Capps, S.R., 1924, The Alaskan mining industry in 1922, in Mineral resources of Alaska: U.S. Geological Survey Bulletin 755, p. 3-49. Capps, S.R., 1916, The Chisana-White River district, Alaska: U.S. Geological Survey Bulletin 630, 130 p. Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374,213 p. Cobb, E.H., and MacKevett, E.M., Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the McCarthy Quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-885, 156 p. Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1992, 379 p. Gardner, E.D., Johnson, C.H., and Butler, B.S., 1938, Copper mining in North America: U.S. Bureau of Mines Bulletin 405, 300 p. Knaebel, Jeff, 1970, Geochemical survey and geological reconnaissance of the White River area, south-central Alaska: Alaska Division of Mines and Minerals G~ochemical Report 21, 60 p. Koshmann, A.H., and Bergendahl, M.H., 1968, Principal gold-producing districts of the United States: U.S. Geological Survey Professional Paper 610,283 p. MacKevett, E.M., Jr., 1970, Geologic map of the McCarthy C-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-844, scale 1:63,360. MacKevett, E.M., Jr., 1970, Geologic map of the McCarthy C-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-899, scale 1:63,360. , ~Iaska Resource Data File Page 119

MacKevett, E,M" Jr., 1970, Geology of the McCarthy B-4 quadrangle, U.S, Geological Survey Bulletin 1333,31 p. MacKevett, E.M., Jr., 1971, Stratigraphy and general geology of the McCarthy C-5 quadrangle, Alaska: U.S. Geological Survey Bulletin 13~3, 35 p. MacKevett, E.M., Jr., 1972, Geologic map of the McCarthy C-6 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-979, scale 1:63,360. MacKevett, E.M., Jr., 1973, Reconnaissance geologic map of the McCarthy A-5 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF- 536, scale 1:63,360. MacKevett, E.M., Jr., 1974, Geologic map of the McCarthy B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1146, scale 1:63,360. MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Stpdies Map MF- 773B, scale 1:250,000. MacKevett, E.M., Jr., Albert, N.R.D., Barnes, D.F., Case, J.E., Robinson, Keith, and Singer, D.A., 1977, The Alaskan Mineral Resource Assessment Program: Background information to accompany folio of geologic and mineral resource maps of the McCarthy quadrangle, Alaska: U.S. Geological Survey Circular 739,23 p. MacKevett, E.M., Jr., and Radtke, A.S., 1966, Hydrothermal alteration near the Kennecott copper mines, Wrangell Mountains area, Alaska - A preliminary report, in Geological Survey research 1966: U.S. Geological Survey Professional Paper 550B, p. B165-B168. MacKevett, E.M., Jr., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p. MacKevett, E.M., Jr., and Smith, J.G., 1972, Geologic map of the McCarthy B-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-943, scale 1:63,360. . MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1418, scale 1:63,360. Mendenhall, W.C., 1905, Geology of the central Copper River region, Alaska: U.S. Geological Survey Professional Paper 41, 133 p . . - Mendenhall, W.C., and Schrader, F.C., 1903, Copper deposits of the Mount Wrangell region, Alaska: U.S. Geological Survey Bulletin 213, p. 141-148. Miller, D.J., 1946, Copper deposits of the Nizina district, Alaska: U.S. Geological Survey Bulletin 947F, p. 93-120. Moffit, F.H., 1912, The Chitina copper district, in Mineral resources of Alaska in 1911: U.S. Geological Survey Bulletin 520, p. 105-107. Moffit, F.H., 1912, The Taral and Bremner River districts, in Mineral resources of Alaska in 1911: U.S. Geological Survey Bulletin 520, p. 93-104. Moffit, F.H., 1914, Geology of the Hanagita-Bremner region, Alaska: U.S. Geological Survey Bulletin 576, 56 p. Moffit, F.H., 1918, Mining in the lower Copper River basin, in Mineral Resources of Alaska in 1917: U.S. Geological Survey Bulletin 662, p. 155-182. Moffit, F.H., 1937, Recent mining developments in the Copper River region, Alaska: U.S. Geological Survey Bulletin 880B, p. 97-109. . ~. Waska Resource Data Fil~ Page 120

Moffit, F.H., 1938, Geology of the Chitina Valley and adjacent areas, Alaska: U.S. Geological Survey Bulletin 894, 137 p. Moffit, F.H., 1943, Geology of the Nutzotin Mountains, Alaska, with a section on the igneous rocks by RG. Wayland: U.S. Geological Survey Bulletin 933B, p. 103-174.

Moffit, F.H., and Capps, S.R, 1911, Geology and mineral resources of the Nizina districtf Alaska: U.S. Geological Survey Bulletin 448, 111 p. Moffit, F.H., and Knopf, Adolph, 1910, Mineral resources of the Nabesna-White River district, Alaska, with a section on the Quaternary by S.R Capps: U.S. Geological Survey Bulletin 417, 64 p. Moffit, F.H., and Maddren, A.G., 1908, The mineral resources of the Kotsina and Chitina valleys, Copper River region, in Mineral resources of Alaska in 1907; U.S. Geological Survey Bulletin 345, p. 127-175. Moffit, F,H., and Maddren, A.G., 1909, Mineral resources of the Kotsina-Chitina region, Alaska: U.S. Geological Survey Bulletin 374, 103 p. Moffit, F.H., and Mertie, J.B., 1923, The Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 745, 149 p. Sainsbury, C.L., 1952, Geology of the Nelson and Radovan copper prospects, Glacier Creek, Alaska: U.S. Geological Survey Open-File Report 61, 18 p. Seitz, J.F., 1963, Copper prospect in the upper Chitina Valley, Alaska: U.S. Geological Survey Bulletin 1155, p. 66-72. Singer, D.A., and MacKevett, E.M., Jr., 1976, Mineral resources of the McC;3.rthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF- 773C, scale 1 :250,000. Smith, P.S., 1942, Occurrences of molybdenum minerals in Alaska: U.S. Geological Survey Bulletin 926C, p. 161-210. U.S. Bureau of Mines, 1995, Spatial data extracted from the Minerals Availability System/Minerals Industry Location System (MAS/MILS): U.S. Bureau of Mines Special Publication 12-95, CD-ROM. U.S. Geological Survey, 1996, Descriptions of the fields used to report brief descriptions of mines, prospec.ts, and mineral occurrences in Alaska and Hawaii: U.S. Geological Survey Open-File Report 96-79, 5 p. Van Alstine, RE., and Black, RF., 1946, Copper deposits of the Kotsina-Kuskulana district, Alaska: U.S. Geological Survey Bulletin 947G, p. 121-141. Winkler, G.R, and MacKevett, E.M., Jr., 1981, Geologic map of the McCarthy C-7 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1533, scale 1:63,360.