I , M LA _
SAL OF CORONADO | NATIONAL FOREST, PART 10
| Santa Teresa Mountains Unit | Graham County, Arizona
I Santa Teresa Mountains Unit I I I I ' I _ ~~~~ ~,~ ,
| , AU ~ | UNITED STATES DEPARTMENT OF THE INTERIOR I ! I I MINERAL APPRAISAL OF THE CORONADO NATIONAL FOREST PART 10, SANTA TERESA MOUNTAINS UNIT, I GRAHAM COUNTY, ARIZONA I I by
i S. Don Brown i MLA 26-93 l 1993 ! i i Intermountain Field Operations Center I Denver, Colorado i
UNITED STATES DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary
BUREAU OF MINES I HERMANN ENZER, Acting Director I I i! I :
50272-101 3.. Reclpient's Accession No. REPORT DOCUMENTATION 1I- REPORT NO. PAGE I 4. T~le and Subtitle 5. Report Date Mineral Appra.isal of. the Coronado National Forest, Part 10, Santa Teresa Mountains Unit, Graham County, Arizona 6.
7. Author(s) 8. Performing Organization'Rept. No. S. Don Brown 9. performing Organization Name and Address 10. Project/Task/Work Unit No.
11. Contract(C) or Grant(G) No.
(C)
(G)
][2. Sponsoring Organization Name and Address 13. Type of Report & Period Covered
14.
15. Supplementary Notes
16. Abstract (Limit: 200 words)
The Bureau of Mines conducted a mineral investigation of the Santa Teresa Mountains part of the Coronado National Forest, Arizona, during 1990-1992 to appraisethe mineral resources and to identify and describe areas with past mining activity. No mineral resources were identified during this study, only mineral occurrences at several locations. The only known production from within the Forest Unit was a small amount of copper from a small mine in the north-central part. A substantial amount of mining and production took place in the Aravaipa district west of the Forest. During the field investigation, no current mining activity was observed in or near the Unit.
17. Docume~ Ana~is a. De~pto~ Mineral resources Precious metal ore deposits Mineral deposits Economic geology Base metal ore deposits b. Identifie~/Open-End~ Terms Coronado National Forest Santa Teresa Mountains Mineral resources
c. COSATI Field/Group 21. No. of Pages 18. Availability Statemen;. 19. Security Class (This Report)
20. Security Class (This Page) 22. Price
See ANSI--Z39.18) See Instructions on Reverse OPTIONAL FORM 272 (4-//) (Formerly NTIS-35) PREFACE
A January 1987 Interagency Agreement between the U.S. Bureau of Mines,
I U.S. Geological Survey, and U.S. Forest Service describes the purpose, authority, and I program operation for the forest-wide studies. The program is intended to assist the Forest Service in incorporating mineral resource data in forest plans as specified by the I National Forest Management Act (1976) and Title 36, Chapter 2, Part 219, Code of Federal Regulations, and to augment the Bureau's mineral resource data base so that
I it can analyze and make available minerals information as required by the National I Materials and Minerals Policy, Research and Development Act (1980). I I
This open-file report summarizes the results of a U.S. Bureau of Mines forest-wide study. The report is ! preliminary and has not been edited or reviewed for conformity with the Bureau of Mines editorial standards. This study was conducted by personnel from ! Intermountain Field Operations Center, Building 20, Denver Federal Center, Denver, CO 80225. ! i I ~
± !
CONTENTS I Paae SUMMARY ...... 1 i INTRODUCTION ...... 1 Geographic setting ...... 2 Previous investigations ...... 2 i Methods of investigation ...... 4 Geologic setting ...... 5 Mining history ...... 6
I MINERAL APPRAISAL ...... 7 Cobre Grande Mountain area ...... 7 Fisher Canyon prospects ...... 8 I Southwest Forest area ...... 9 I CONCLUSIONS ...... 11 REFERENCES ...... 12
I Appendix A--Data for samples from the Santa Teresa Mountains Unit Coronado National Forest, Graham County, Arizona ...... 13
I B--Inductively coupled plasma-atomic emission spectroscopy multi-element analytical data for samples analyzed by I Chemex Labs, Inc ...... 19 C--Neutron activation multi-element analytical data for I samples analyzed by Bondar-Clegg & Company Ltd ...... 21 D--Data for individual mines and prospects in the Santa Teresa Mountains Unit, Coronado National Forest, i Graham County, Arizona ...... 23 E--Mine location and mine map figures for the Santa Teresa Mountains Unit, Coronado National Forest, I Graham County, Arizona ...... 44
I, ILLUSTRATIONS
I Plate 1. Sample locality map of the Santa Teresa Mountains at Unit, Coronado National Forest, Graham County, Arizona ...... back I I iiiiI ILLUSTRATIONS--continued I Pa_Ea~ Figure 1. Index map of the Santa Teresa Mountains unit, I Coronado National Forest, Graham County, Arizona ...... 3 Figures 2-1 0, Maps of:
2. Mines and prospects near Cobre Grande Mtn. I showing sample localities ST 1-18 ...... 45 I 3. Cowboy Tunnel showing sample localities ST 1-18 ...... 46 4. Adit southeast of the Cowboy Tunnel showing sample I localities ST 13-18 ...... 47 5. Fisher Canyon mines and prospects showing sample I localities ST 20-35 ...... 48 6. Adits in Fisher Canyon showing sample localities ST 20-23 ...... 49 I 7. Adits in Fisher Canyon showing sample localities ST 25-34 ...... 50
8. Mines and prospects in the southeast part of the Forest I Showing sample localities ST 36-50 ...... 51 9. Adit north of the Dogwater Mine showing sample I localities ST 36-39 ...... 52 10. Adits east-southeast of the Dogwater Mine showing sample I localities ST 43, 45-46 ...... 53 I iI, I I I
,o. I III i I
I UNIT OF MEASURE ABBREVIATIONS USED IN THIS REPORT
I $ dollar (U.S.) I ft foot in. inch I Ib pound mi mile
I mi 2 square mile i % percent oz troy ounce
I oz/st troy ounce per short ton I ppb part per billion ppm part per million I st short ton (2,000 Ib) :i iil 'I
II
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! MINERAL APPRAISAL OF THE CORONADO NATIONAL FOREST, PART 10, SANTA TERESA MOUNTAINS UNIT, GRAHAM COUNTY, ARIZONA II By S. Don Brown 1 !
SUMMARY
I Between 1990 and 1992, the U.S. Bureau of Mines conducted a mineral I investigation of the Santa Teresa Mountains Unit part of the Coronado National Forest to appraise the mineral resources and to identify and describe areas with past mining
I activity. The study included a comprehensive literature search combined with a field I investigation involving the examination of known mines, prospects, and mineralized areas. This study is part of the Bureau's overall mineral evaluation of the Coronado
I National Forest and will be included in a summary report of the Forest. i Mineral occurrences were identified and described at several locations in the Unit. The only known production from within the Unit was a small amount of copper I from a mine in the north-central part. A substantial amount of mining and production took place in the Aravaipa district west of the Forest. During the field investigation,
I no current mining activity was observed in or near the Unit. I INTRODUCTION The U.S. Bureau of Mines studied the mineral resources of the Santa Teresa
I Mountains Unit during 1990-92 on land administered by the U.S. Forest Service. This I study is part of the Bureau's overall mineral evaluation of 13 study units of the Coronado National Forest. I
Mining Engineer, Intermountain Field Operations Center, U.S. Bureau of Mines, Denver, Colorado Geographic setting
The Santa Teresa Mountains Unit includes 48,967 acres (76.5 mi 2) of the
Coronado National Forest, in Graham County, southeastern Arizona (fig. 1 ). The Santa
Teresa Wilderness includes approximately 32,800 acres (two-thirds) of this Unit (plate
1). Pima, Thatcher, Safford, and Fort Thomas are major communities east of the
range, Klondyke is a small community southwest of the range, and Aravaipa is a near-
deserted mining camp town west of the range. The San Carlos Indian Reservation
borders the Forest on the north, The Pinaleno Mountains are to the southeast, and the
Galiuro Mountains and Aravaipa Canyon are south and southwest of the study area.
Elevations in the Unit range from 3,800 ft at the southwest corner to 7,550 ft at a
peak on Pinnacle Ridge in the southern part. Access to the area is from U.S. Highways
666 and 70 on the east and southeast. Unnamed dirt roads provide access to the east side from U.S. Highway 70. An all weather dirt road provides access to the south and southeast part of the Forest. The Aravaipa Road provides access to the west and southwest part and various Forest roads and jeep trails branch off from the all weather and Aravaipa roads providing access to and near the study area.
Previous investigations
Perhaps the best reference for the geology and ore deposits of the Santa Teresa
Mountains and Aravaipa mining district is a report by Simons (1964). This publication includes the western half of the study area. A geologic map by Blacet and Miller
(1978) covers the eastern half of the study area. Previous geologic work in the region was a reconnaissance study of the Aravaipa and Stanley mining districts by Ross
(1925); this report is valuable for its description of many mines and prospects which ! I I I
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I Figure 1.-- Index map of the Santa Teresa Mountains Unit, Coronado National Forest, Graham County, Arizona i 3 I '1 ~ are now inaccessible. Brief descriptions of mines in the Aravaipa district were I published by Denton (1947) and Wilson (1950). Methods of investigation
I A detailed literature search for pertinent geologic and mining information was I made prior to the field investigation. Bureau of Land Management and county records were examined for patented and unpatented mining claim locations. I The Bureau's field study concentrated on tl~e examination of known mines, i prospects, and mineralized areas inside the Forest boundary. A total of 14 field-days was spent during the spring of 1990 and the winter of 1991. Accessible mines and I prospect workings were mapped and sampled. Veins, potentially mineralized structures, altered and/or mineralized outcrops, and dumps of inaccessible workings
I were sampled. I Fifty samples were taken; they consisted of four types: 1) chip -- a regular series of rock chips taken in a continuous line across a mineralized zone or rock face;
I 2) grab -- rock collected randomly from a dump, stockpile, other rock at a mine I working, or float; 3) select -- sample intentionally selected from mineralized rock resulting in maximum mineral concentrations; and 4) dump -- rock collected from a
I mine dump on a grid or spaced such that a representative sample of the dump is taken. I All samples were analyzed by Chemex Labs, Inc., of Vancouver, British Columbia, for 32 elements by an inductively coupled plasma (ICP) method, and by Bondar-Clegg & I Co. Ltd., of Vancouver, British Columbia, for 34 elements by a neutron activation method. Selected samples were re-analyzed by Chemex for specific elements when the
I assay results were above the saturation limits for instrumental analysis; these elements I include copper, lead, silver, and zinc. Sample descriptions are summarized in appendix i 4 I
A, and all analytical results are in appendixes B and C. Where sample analytical data I is presented in the text, the higher of the two numbers, either Chemex or Bendar- Clegg, is shown. Descriptions of individual mines and prospects are in appendix D;
I mine location and mine maps are in appendix E. I Geologic setting The majority of rock in the Santa Teresa Mountains is Upper Cretaceous to I Lower Tertiary granitic rock that generally constitutes the core of the range. This unit I is called the Santa Teresa Granite by Simons (1964). Precambrian granitic rocks and quartzites compose the majority of the southeastern part of the study area; I Precambrian granodiorite is common in the west side. The Precambrian Pinal Schist crops out in the northeastern and southwestern part of the Forest. Units of
I Mississippian Escabrosa Limestone and Pennsylvanian Horquilla Limestone are present I in the northern part of the study area. Volcanic rocks have been mapped only in the extreme northwest and southwest part of the Forest but they are common west of the
I Forest. (See Blacet and Miller, 1978; Simons, 1964). I According to Simons (1964, p. 119), the mineral deposits of the Aravaipa district include various types, among them veins in many kinds of wallrock,
I replacement deposits in Paleozoic carbonate rocks, and breccia pipes in metavolcanic I and plutonic igneous rocks. Principal structural features in the Santa Teresa Mountains are faults. The faults range in size from minor breaks to major structures such as the I Grand Reef Fault. This fault crosses the southwest corner of the study area and has been traced for about 9 mi (plate 1). The Grand Reef Mine, one of the major mines in
I the district, is on this fault just outside the Forest Unit. A similar deposit could be on I this structure inside the Forest at depth. I 5 Most ore deposits in the Aravaipa district are along north-northwest-trending I faults, mostly outside the Forest. (See Simons, 1964, p. 108, plate 1.) Minor structures have been mapped throughout the core of the range in the Santa Teresa
I Granite. Blacet and Miller (1978) show a number of northwest- to northeast-trending I faults in the eastern part of the range. The most prominent fault, the Goodwin Canyon Fault, is shown to extend northwesterly through the study area for about 12 mi. There I is no known mineralization related to this fault. Mining history
I The Aravaipa mining district is on the west side of the Santa Teresa Mountains I and includes part of the Forest. Only a minute amount of mineral production in this district was from within the Forest. Mineral deposits were discovered in the Aravaipa
I district in the 1870's and a small smelter was built at Aravaipa. Records of production I before 1915 are meager, but a small amount of copper, lead, and silver ore was reported to have been shipped from several mines. Simons (1964, p. 132) lists
I production for the Aravaipa district between 1915-58 as 273,000 st of ore that I yielded 16,130 st of lead, 13,620 st of zinc, 918 st of copper, 3,510 oz of gold, and 351,000 oz of silver. At 1993 metal prices this production would have a value of I approximately $28.2 million. Keith and others (1983, p. 16) give a slightly higher production figure for the district: 282,000 st of ore produced between 1901-72.
I The only record of production from Forest land is from the Cobre Grande Mine I or Cowboy Tunnel where a carload (about 60 st) of ore containing about 8% copper was shipped before 1920 (Ross, 1925, p. 103). The deposits were probably located
I in 1905 (Ross 1925, p. 102). I I The Copper Bar and Sam Jones prospects are on patented land inside the west part of the Forest near Copper Canyon. Ross (1925, p. 92) reports that 15 st of handpicked copper ore was shipped from these workings in 1902. The Dogwater Mine is on a patented claim inside the southwest part of the Forest. In 1920, 160 st of concentrated ore was shipped from the this mine (Ross, 1925, p. 81 ). Lead and silver were the primary metals recovered from the ore and possibly a small amount of copper.
In Fisher Canyon, near the east-central part of the study area, are several short adits that expose copper minerals. The claims here were located in the early 1900's; there is no record of production for the workings.
The Stanley mining district, mostly in the San Carlos Indian Reservation, joins the Aravaipa district on the north and is adjacent to the northwest corner of the study area. Keith and others (1983, p. 48) report a production of 1,900 st of ore between
1905-1969 that yielded 143,000 Ib of copper, 665,000 Ib of lead, 200 oz of gold, and
9,300 oz of silver. The 1993 value of this production would be approximately
$460,000.
No evidence of current mining activity in or near the Forest was observed.
MINERAL APPRAISAL
Mineral occurrences were examined at three sites in the Forest Unit: in the
Cobre Grande Mountain area, in Fisher Canyon, and in the southwest part of the study area.
Cobre Grande Mountain area
During the present investigation, two adits, a prospect pit, and some shallow
bulldozer cuts were located in an area north of Cobre Grande Mountain (fig. 2). Ross
7 I
(1925, p. 102) gives vague descriptions of other workings in this area. All of the I workings in this area are generally referred to as the Cobre Grande Mine. The Cowboy Tunnel (fig. 3) consists of an irregular adit with over 300 ft of workings, a 46-ft-deep I winze, a short raise, and 2 small stopes. The mineralized rock occurs as irregular replacement bodies in limestone and altered limestone. Pyrite, chalcopyrite, chalcocite,
I chalcanthite, and hematite are minerals noted in the adit. Eleven samples (ST 2-12) I taken from the adit have an average of 4,400 ppm (0.44%) copper but only low concentrations for other metals (appendixes B, C). No resources were identified in the
I Cowboy Tunnel because of the irregular mineral occurrences and low metal I concentrations. About 700 ft southeast of the Cowboy Tunnel is an adit caved at 205 ft from
I the portal (fig. 4). Ross (1925, po 102) reports this adit was over 700 ft long. The I accessible part of the adit is in altered Pinal Schist (Simons, 1964, p. 136). Sparse malachite stains are present in the adit. Six samples from the adit had low metal
I concentrations. I Fisher Canyon prospects Near the head of Fisher Canyon are five short adits in granitic rock that expose I small, irregular zones of copper mineralization (figs. 5-7). Fifteen samples taken from these adits contain from 310 ppm to 3.95% copper with low concentrations of other
I metals. Most of the samples were taken across zones or structures with visible copper I minerals. Chrysocolla, the major copper mineral occurs as small, irregular zones and pods. No resources could be identified at these workings because of the small,
I irregular occurrences of the copper minerals. I i Southwest Forest area I In the southwest corner of the study area is a block of patented claims; several small adits and prospect pits are both inside and outside of the claims (plate 1, fig. 8). I The largest working, the Dogwater Mine, is a caved adit about 140 ft long with a stope to the surface (Ross, 1925, p. 79). The adit was driven along a fault of the
I Grand Reef structure (plate 1). The Grand Reef Mine, just outside the Forest I boundary, was the second largest producing mine in the Aravaipa district (appendix D, p. 44).
I Sample ST 40 from a small stockpile at the Dogwater Mine assayed 4.65% I lead, 1.72% molybdenum, and 88.8 ppm {2.6 oz/st) silver, but it contained low concentrations of other metals. About 900 ft north-northwest of the Dogwater Mine
I is a 42-ft-long adit (fig. 9) driven on a major shear zone between altered rhyolite and I a diabase dike, likely part of the Grand Reef structure. Two samples taken from the shear zone (ST 37, 39) assayed 2.49% and 7.25% lead and one of the samples I contained 10.2 oz/st silver. Two samples taken from the wallrock (ST 36, 38) also I contained lead, and all the samples contained zinc, from 2,038 ppm to 8,206 ppm, and copper, from 551 ppm to 3,609 ppm (appendix B)o Galena was the only ore I mineral noted in the adit. About 600 ft northwest of the Dogwater Mine is a 150-ft-long open cut along
I a fault between rhyolite and granite. A sample taken across the fault showed elevated I concentrations of copper, lead, silver, molybdenum, silver, and zinc (appendix B, sample ST 41). Sample ST 42 from a small ore stockpile assayed 6.97% lead and
I 50.2 ppm (1.5 oz/st) silver, with lesser concentrations of other metals. Galena, I malachite, and wulfenite were identified in this sample. I
I H About 2,300 ft east-southeast of the Dogwater Mine are three short adits (fig. I 8)'. One of the adits was driven through alluvium and intersected altered schist with a minor amount of malachite stains (fig. 10). Sample ST 43 from the altered schist I had low concentrations of copper, gold, lead, silver, and zinc (appendixes B, C). Near I this adit is a caved adit that was driven on or through a granite/schist contact. Sample ST 44 from the dump of this caved adit had low metal concentrations; no ore minerals I were noted on the dump. The third adit in this group was driven on a shear zone in schist (fig. 10). Galena is present in the shear zone; two samples from the zone (ST
I 45, 46) averaged 1.3% lead and 0.5% zinc. I Several prospect pits lie over 1 mi east and southeast of the Dogwater Mine (fig. 8, samples ST 47-50). Sample ST 47 was taken from an altered shear zone on
I the contact between schist and granite; the assay showed low metal concentrations. I Sample ST 48 is from a wide shear zone exposed in a small open cut. Azurite, chrysocolla, and malachite are present in the shear, and the assay showed I concentrations of 8,452 ppm copper, 1.91 % lead, and 11,000 ppm zinc in the sample. I Samples ST 49 and 50 are from small pits or trenches in altered schist. Chrysocolla was the only identified ore mineral in these workings. Sample ST 49 had generally low I metal concentrations, but sample ST 50 assayed 4.65% copper, 4,052 ppm lead, 1,066 ppm zinc, 66 ppm (1.9 oz/st) silver, and 3,810 ppb (0.11 oz/st) gold. The
I mineralized zones could not be traced beyond the limits of the workings. I Mineral occurrences were identified in the southwest part of the Forest during this investigation and are discussed in previous literature. No resources could be
I estimated due to ground cover over potentially mineralized rock or because of I inaccessibility of workings. The Dogwater Mine area is on the same structural trend I 10
: IiI I as the Grand Reef Mine, about 3/4 mi distant. The Grand Reef Mine had a substantial I arnount of production; however, at the surface, metal concentrations weaken southward from the mine into the Forest. There is a possibility of deposits at depth I in the Forest, but this would need to be confirmed by underground exploration or drilling. There is no known production of industrial minerals or rocks from within the
I study area, and no rocks are known to contain unique properties for industrial mineral I use compared to rocks outside the study area and c|oser to markets. CONCLUSIONS
I No mineral resources were identified in the Santa Teresa Mountains Unit due I to the sparse mineral occurrences, weak mineralization at and near prospects, or ground cover over potentially mineralized areas. The only known production from
I within Forest land is one carload of ore from the Cobre Grande Mine in the north- I central part of the Forest. Any production from other prospects would have been small. Future prospecting activity in the Unit would most likely occur in the area north I of Cobre Grande Mountain, the Fisher Canyon area, or the southwest corner of the I Forest. These are the areas that have mineral occurrences and had mining or prospecting activity in the past. I I
I
11 I REFERENCES
Bl'acet, P. M., Miller, S. T., 1978, Reconnaissance geologic map of the Jackson I Mountain Quadrangle, Arizona: U.S. Geological Survey Miscellaneous I~ield Studies Map MF-939, scale 1:62,500. I Denton, T. C., 1947, Aravaipa lead-zinc deposits, Graham County, Arizona: U.S. Bureau of Mines Report of Investigations 4007, 14 po I Keith, S. B., Gest, D. E., DeWitt, Ed, Toll, N. W., and Everson, B. A., 1983, Metallic mineral districts and Production in Arizona: Arizona Bureau of Geology ~and Mineral Technology Bulletin 194, 58 p.
I Ross, C. P., 1925, Geology and ore deposits of the Aravaipa and Stanley Mining districts, Graham County, Arizona: U.S. Geological Survey Bulletin 763, I 120 p. Simons, F. S., 1964, Geology of the Klondyke Quadrangle, Graham and Pinal Counties, I Arizona: U.S. Geological Survey Professional Paper 461, 173 p. Wilson, E. D., 1950, Aravaipa district, in Arizona zinc and lead deposits: Arizona I Bureau of Mines Bulletin 156, p. 51-63. I l ,l l ill | II i I 12 /I
APPENDIX A ! DATA FOR SAMPLES FROM THE SANTA TERESA MOUNTAINS UNIT, ! CORONADO NATIONAL FOREST, GRAHAM COUNTY, ARIZONA
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13 I I
I Appendix A.--Data for samples from the Santa Teresa Mountains, Coronado National Forest. I {xx, not applicable} Sample I Number Type Length Remarks ST 1 Grab xx Small prospect pit; small skarn zone in limestone, altered limestone, epidote, actinolite, I garnet, iron and manganese stains. ST 2 Chip 2.5 ft Cowboy Tunnel; flat-lying contact between I highly fractured limestone and competent blocky limestone; sparse copper stains. (See fig. 3.) ST 3 Chip 4.5 ft Cowboy Tunnel; 1-ft zone clayey gouge between I contact of competent limestone and altered limestone; abundant iron staining, fine-grained, I disseminated specularite. ST 4 Chip 3 ft Cowboy Tunnel; altered and intensely iron stained rock, disseminated, fine-grained I specularite. ST 5 Chip 2.5 ft Cowboy Tunnel; pod of mineralization 1.5 ft by 4 ft; abundant chalcanthite, disseminated pyrite; I pod surrounded by limonitic, clayey gouge. ST 6 Chip 3 ft Cowboy Tunnel; mineralized zone about 3 ft thick; heavily altered and iron stained rock, I abundant disseminated pyrite and hematite. ST 7 Chip 2.5 ft Cowboy Tunnel; prominent mineralized zone in I prominent fault zone; abundant disseminated pyrite, chalcanthite, limonite; possible I chalcopyrite and chalcocite. ST 8 Chip 3 ft Cowboy Tunnel; pocket of mineralization about 10 ft by 3 ft; abundant massive pyrite and I limonite, sparse copper staining. ST 9 Chip 2 ft Cowboy Tunnel; prominent mineralized zone; I abundant pyrite and chalcanthite.
1 Dump size was used to estimate length of a 4-ft x 6-ft adit. I Small dump = 10-100-ft-long adit. Medium dump = 100-300-ft-long adit. I Large dump = over 300-ft-long adit. 14 !iiI
I Appendix A.--Data for samples from the Santa Teresa Mountains, Coronado National Forest.--Continued I Sample I Number Type Length Remarks ST 10 Chip 3 ft Cowboy Tunnel; stoped major mineralized zone; abundant chalcanthite and sulfides, mostly I pyrite; altered lim0nitic rock. ST 11 Chip 4 ft Cowboy Tunnel; stoped mineralized zone up to 4 ft thick; abundant chalcanthite and sulfides, I mostly pyrite; abundant limonitic gouge. ST 12 Chip 3 ft Cowboy Tunnel; major mineralized zone, I common chalcanthite, limonite, chalcocite. ST 13 Chip 2 ft Adit, caved at 205 ft; prominent shear with thin seam of limonite; fractured and altered, I abundant limonite stains; reported by Simons (1964) to be in Pinal Schist. (See fig. 4.) I ST 14 Chip 3 ft Same adit as sample 13; fractured, altered, weathered rock with abundant limonite stains. ST 15 Chip 2.5 ft Same adit as sample 13; clayey gouge zone, I bleached white, abundant limonite stains. ST 16 Chip 4 ft Same adit as sample 13; altered and iron-stained I rock; abundant fine-grained specularite and epidote. ST 17 Chip 3 ft Same adit as sample 13; prominent clayey gouge I zone with epidote and limonite.
ST 18 Chip 3 ft Same adit as sample 13; gouge zone with I epidote, iron, and sparse copper stains, rock is heavily stained, altered porphyry.
ST 19 Dump XX Small prospect pit; altered and bleached granite, I limonite stains, small chunks of quartz.
ST 20 Select XX Adit, 40 ft long; abundant chrysocolla, hematite, I minor chalcopyrite; medium-grained granite. country rock (See fig. 6.) I I 15 Appendix A.--Data for samples from the Santa Teresa Mountains, Coronado National Forest.--Continued
Sample I Number Type Length Remarks ST 21 Chip 2 ft Adit, 45 ft long; zone of altered granite and chrysocolla 8 ft by 3 ft; granite country rock. I (See figure 6.) ST 22 Chip 2 ft Same adit as sample 21; 8-ft-long zone of I altered granite, abundant hematite. ST 23 Select XX Same adit as sample 21; stockpile on dump; I hematite and altered granite. ST 24 Grab XX Medium dump of flooded adit; chrysocolla, hematite, altered granite. I ST 25 Chip 2.5 ft Adit, 300 ft of workings; prominent fault, hematite, weathered granite. (See fig. 7.) ST 26 Chip 2.5 ft Same adit as sample 25; prominent fault plane; I limonite, abundant hematite, minor chrysocolla. ST 27 Chip 2.5 ft Do. I ST 28 Chip 3 ft Same adit as sample 25; mineralized zone with abundant hematite and chrysocolla; altered and I si!icified granite. ST 29 Chip 3 ft Same adit as sample 25; prominent fault plane, abundant hematite and limonite, minor I chrysocolla; altered and fractured granite. ST 30 Chip 2.5 ft Same adit as sample 25; prominent fault plane, abundant hematite and limonite stains, minor I chrysocolla; thin seams of limonite gouge. ST 31 Chip 2 ft Same adit as sample 25; prominent fault plane, I common hematite and limonite stains, altered and weathered granite. ST 32 Chip 2.5 ft Adit, 65 ft long; prominent fault zone with 0.5- I ft-thick zone of abundant chrysocolla; granitic country rock. (See fig. 7.) I
16 i II ~
Appendix A.--Data for samples from the Santa Teresa Mountains, Coronado National Forest.--Continued
Sample I Number Type Length Remarks ST 33 Chip 1.3 ft Same adit as sample 32; shear zone, moderate chrysocolla and hematite. '= I ST 34 Chip 1 ft Same adit as sample 32; fault zone, minor chrysocolla and hematite. I ST 35 Grab xx Prospect pit; chrysocolla, altered granite, abundant hematite. ST 36 Chip 5 ft Adit, 42 ft long; bleached and altered rhyolite, I abundant limonite stains. (See fig. 9.) ST 37 Chip 4 ft Same adit as sample 36; major fault zone, I silicified and brecciated rhyolite, gouge, abundant limonite stains. ST 38 Chip 3 ft Same adit as sample 36; diabase dike, black, I aphanitic, weathered, minor iron staining. ST 39 Chip 3 ft Same adit as sample 36; major shear zone in I rhyolite at contact of diabase dike, altered rhyolite, breccia, gouge, minor galena. ST 40 Select xx Dogwater Mine, small stockpile; altered, I brecciated, silicified rock, wulfenite common, limonite, hematite, other unidentified metallic I minerals. ST 41 Chip 3 ft Open cut, about 150 ft long; fault zone at contact between rhyolite and granite; silicified I breccia, gouge, iron staining.
ST 42 Select XX Same open cut as sample 41; small stockpile, I silicified rock, minor wulfenite, malachite. ST 43 Chip 3 ft Decline, 35 ft long; schist, altered, sheared, brecciated gouge, limonite, minor malachite. I (See fig. 10.) I I 17 ~,ii !
Appendix A.--Data for samples from the Santa Teresa Mountains, Coronado National Forest.--Continued I Sample I Number Type Length Remarks ST 44 Dump XX Dump, caved adit, at least 40 ft long, driven on or through contact of granite and schist; I bleached and altered granite, altered and iron- stained schist. ST 45 Chip 2.5 ft Adit, 25 ft long, shear zone strikes N. 35 o W., I dips 80 ° N.; altered, bleached schist, breccia, limonite stains. (See fig. 10.) I ST 46 Chip 3 ft Same adit and shear zone as sample 45, shear zone strikes N.-S., vertical dip, 2-in.-thick zone of disseminated galena. I ST 47 Chip 5 ft Prospect pit, 10 ft by 8 ft by 3 ft deep; sheared and altered zone on contact between schist and I granite; breccia, gouge, limonite. ST 48 Chip 2.5 ft Open cut, 8 ft deep, wide shear zone, altered, bleached, breccia gouge; azurite, malachite, chrysocolla, limonite, limonite gouge; schist I country rock. ST 49 Select XX Prospect pit, 15 ft diameter, 5 ft deep; small ore i stockpile, silicified schist, chrysocolla, minor limonite, hematite, manganese stains, schist trends N. 55 ° E., dips 67 ° NW. I ST 50 Select xx Similar to sample 49, abundant chrysocolla. i I ili!iI ~ i
18 ill
!11
APPENDIX B ! INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION SPECTROSCOPY MULTI-ELEMENT ANALYTICAL DATA FOR SAMPLES ANALYZED BY ! CHEMEX LABS, INC.
i~i~I I ~I~ 19 n m | m .m m m m m m m m nln m m m m m m
Appendix B.--Inductively coupled plasma-atomic emission spectroscopy multi-element analytical data for samples analyzed by Chemex Labs, Inc.
[<, less than lower detection limit (some elements elevated detection limits due to interference from other elements); >, greater than; o/t, rerun values for overlimits, oz/st, fire assay; *, rerun values for overlimits, %, AAS.]
ST Ol 2.2 0,26 40 < 10 5.0 < 2 7.73 45,5 19 12 147 6,34 < lO < I < 0,01 < 10 0,63 ~160 8 0,03 5 90 68 5 < I 5 < 0,01 < 10 < lO 3 30 " 0,64 ST 02 < 0,2 0.19 40 < 10 0,5 12 7.16 9.5 11 14 287 5,34 < 10 < I < 0,01 20 2.62 9510 1 0,04 2 160 32 5 < I 15 < 0,01 < 10 < 10 7 30 3370 ST 03 15,0 0,31 65 < 10 5.5 174 0.52 < 0.$ 1 6~ 2|2~ 0,86 < 10 < 1 0,08 20 0,65 4960 7 0,03 5 130 152 5 1 14 < 0.01 < 10 < 10 14 90 152 ST 04 < 0.2 0,43 6O < 10 3O,5 < 2 10,39 < 0,5 18 27 2781 • 15,0~ < 10 < 1 < 0.01 < 10 0.66 • 10000 2 0,04 3 30 14 5 1 7 < 0.01 < 10 < 10 3 100 412 ST 05 0,2 0,68 120 < 10 6,5 14 6,65 < 0,5 30 45 9810 > 15,00 < 10 < 1 < 0.01 30 0.72 8665 12 0,05 3 9~ 32 15 2 7 < 0.01 < 10 < 10 17 50 250
ST 06 0.4 1,83 30 20 4.5 < 2 2.03 1,5 2 56 1636 0.66 < 10 < 1 0,00 30 3.90 6865 < 1 0,05 6 340 446 5 2 50 0,08 < 10 < 10 25 < lO 2220 ST 07 0.8 1,40 60 < 10 20.0 12 3.04 3.5 < I 26 7535 • 15,00 < 10 < I 0~92 40 5.~0 > 10000 9 0,08 7 130 152 10 3 10 0,07 < 10, < 10 34 < 50 2434 ST O8 1.4 0,74 65 < 10 16,0 12 3,99 1.5 11 21 6194 11,01 < 10 ( 1 0.02 ~0 2110 7~0 2 0,06 5 60 40 5 1 13 0.02 < 10 < 10 22 lO 280 ST O9 2.0 0.54 185 < 10 15,5 6 3,15 • O,S 29 23 4250 14,67 • 10 < I 0,10 30 4,45 • IOQQO 21 0.07 • 1 30 170 15 1 0 0,01 < lO < 10 18 20 396 5T 10 2.4 0,42 275 • 10 1.5 4O 2.18 • 0,8 0 43 * 0,64 • 15.00 < 10 < 1 0.02 30 0,67 2415 16 0,63 < 1 < 20~ 20 10 2 3 • 0.01 < 10 • 10 25 200 172
5T 11 2.8 0.$2 165 < 10 0,5 46 5.04 < 0.5 3~3 25 7940 • 15,00 < 10 ~ ][ 0,01 40 1.73 7960 14 0.65 < 1 40 138 20 1 6 < 0.01 < 10 < 10 14 • SO 59~ ST 12 3,0 0.89 70 < 10 19,5 < 20 7.41 • 0.5 83 54 * 0.45 • 15.00 • 10 < 1 0.02 50 1.39 • lOOOO 5 O.OS 1 < BOG 44 10 4 14 0.67 < 10 • 10 42 • 50 450 ST 13 1.2 2,05 15 10 3,5 < 2 1.77 • 0,5 30 127 87 10,14 < 10 • 1 0.08 20 0.20 1950 24 0,03 23 210 28 15 5 192 O,O4 < 10 < 10 36 < 10 596 ST 14 1,0 3.04 5 10 4,0 ~ 2 h50 • 0.5 56 71 49 8,55 < 10 1 0.41 3O 2,07 1460 " 7 0,04 32 540 36 5 11 63 0,20 • 10 • 10 67 • 10 590 ST 15 2.4 4.07 < 5 < 10 7.0 • 2 4.53 4,5 39 6O 157 5,72 10 • 1 0,38 20 5,34 6980 2 0.08 34 700 62 5 10 150 0.32 < 10 • 10 52 < lO 1646
ST 16 < 0,2 1.88 30 < 10 0,5 12 2,56 < 0,5 < 1 22 208 • 15.00 • 10 < 1 0,13 30 0,40 3995 51 0,04 12 540 180 25 3 51 0.05 • 10 • 10 52 409 274 5T 17 < 0,2 1,92 15 I0 1,5 10 1,60 < 0.5 11 68 77 10,05 • 10 < 1 0.25 30 0.04 1958 33 0,03 20 550 42 10 3 83 0.12 • 10 < 10 39 60 126 ST 16 < 0.2 1,30 35 < 10 2.0 • 2 • 15,00 0,5 4 24 20 0.60 • 10 1 0,04 < 10 2,61 5285 18 0.04 6 1310 26 10 3 80 0,00 • 10 • 10 22 20 354 5T 19 1,6 1.54 • 5 30 1,0 • 2 0,28 < 0.5 < 1 195 326 0,02 10 • I 0,10 30 0,23 155 S 0.08 10 40 42 5 2 28 0,05 • 18 < 10 10 • 10 10 ST 20 3,0 0.62 100 370 • 0,5 960 0.32 1.0 163 16 * 3.93 6.44 20 < t 0.02 30 0.10 125 22 0.11 13 4O0 292 5 3 37 0.09 • 10 240 77 • 50 110
ST 21 3.0 1.02 50O 40 < 0.5 000 0.49 • 0,5 155 g * 3.95 5,69 30 < 1 0.06 40 0.07 35 27 0,19 8 2O0 226 5 4 38 0.05 < 10 220 24 < 5O 102 ST 32 • 0.6 1.64 125 10 < 0.5 580 0,26 < 0.5 62 1 * 3,29 8,47 30 < 1 < 0,01 60 0,O6 120 36 O,OB 5 400 76 5 3 33 0,04 < 10 170 32 < 5O 96 ST 23 1.8 0.46 700 40 < 0,5 146 0,07 1,5 566 71 2307 7,95 30 • 1 0.00 20 0.03 850 272 0,00 7 840 126 10 2 10 0.06 10 90 68 < 10 16 ST 24 5.0 0.55 165 10 < 0.5 180 0.60 < 0,5 246 21 • 2,96 3.91 30 • 1 0,00 30 0.68 110 47 0,10 15 400 76 S 3 12 0.12 • 10 200 35 • SO 64 5T 25 < 0.9 0,96 • 5 20 • 0,5 12 0,41 • 0,5 29 25 693 1.12 30 • 1 0.13 30 0,80 455 2 0,11 6 300 24 5 2 18 0,10 20 10 18 < 10 28
ST 25 0.6 1,18 25 < 10 • 0.5 150 0,62 • 0.5 41 $4 4393 2.94 30 ~ 1 0.04 30 0.55 3~0 122 0.07 7 210 8~ 5 1 55 8.06 < 10 120 28 ( 10 32 ST 27 • 0,8 0.54 • 5 • tO • 0,5 66 0.37 • 0.5 28 50 1024 0.88 20 ( 1 0.07 20 0.41 315 3 0.10 4 240 36 5 2 21 0.11 • 10 IO0 11 • 10 18 ST 26 • 0.8 1.37 60 10 • 0.5 220 0,17 < 0.5 IO 57 • 0,99 6,45 20 < 1 0.06 10 0.13 65 106 0,05 2 200 66 5 2 21 0,03 • 10 150 31 < 50 40 ST 28 • 0.0 0.94 5 • 10 • 0.5 76 0,68 < 0,5 34 47 3389 1.64 30 • 1 0,00 40 0,53 300 6 0,05 6 240 40 5 2 53 0.10 |0 100 25 10 22 ST 30 • 0.8 0.9~ 5 30 • 0.5 60 0.50 • 0,5 20 57 1945 1.20 40 < 1 0.15 40 0,57 $90 2 0,08 4 290 34 5 2 47 0.13 30 100 18 < 10 24
ST 31 < 0.8 1.34 < 5 < 10 • 0,5 6 0.68 • 0.5 11 36 310 h16" 40 • 1 0.09 30 1,09 530 • 1 0.08 3 338 • 2 5 2 39 0,13 20 • 10 14 • 10 40 ST 32 < 0.8 0.69 20 20 • 0*5 28 0,33 • 0.5 11 46 5996 2.95 40 < 1 0,16 30 0,17 215 6 0,09 6 300 15 S 2 22 0.11 • 10 120 19 • 10 30 ST 33 • 0.8 0.38 25 10 < 0.5 40 0,42 • 8,5 16 24 " 0,94 1.00 30 • 1 0,12 40 0.10 85 • 1 0,26 5 400 10 5 3 24 0.15 < 10 160 32 • 50 30 5T 34 • 0.8 0,48 < 5 20 < 0.5 10 0.47 1.5 2 49 130 0.96 30 < 1 0,26 20 0.32 255 1 0.19 3 29~ 10 $ 2 16 0.13 • 10 110 13 • 10 16 ST 35 • 0.0 0,38 < 5 10 < 0.5 26O 0,36 • 0,5 8 27 • 2.22 3,61 30 < 1 0,02 30 0.02 165 1 0,16 4 400 72 ~; 2 14 0,14 • 10 190 38 • 5O 68
ST 36 4.0 2.52 95 40 3.5 < 2 0.75 0,5 31 104 551 4,11 10 < 1 0,07 20 0.23 3450 379 0,02 10 380 • 1,20 S 3 14 0,03 • 10 • 10 23 40 2038 ST 37 0.6 3.48 75 220 2,0 • 2 3,80 0.5 8 121 1135 5,00 20 • 1 1.60 10 0,21 825 266 0,04 12 640 • 2,49 40 4 67 0.05 < 10 • 10 40 160 2464 ST 3~ 3,0 5.91 35 300 11.0 • 2 1.76 51.0 86 28 973 • 15,00 20 • 1 0.20 20 2.44 • 10000 67 0,02 116 1300 7126 5 14 43 0.13 • 10 • 10 122 < 50 ~06 ST 39 10.20/E 4.41 90 350 3.0 6 7.43 4,5 37 72 36O9 10,99 20 < 1 1,88 • 10 0,55 6395 2060 0.06 22 720 • 7,25 60 5 196 0,10 • 10 • 10 182 270 5110 5T 40 68,8 0.72 120 290 1.0 2 8,O9 6.0 9 262 217 0,05 • 10 • 1 0,08 • 10 0.03 75 ~ 1,72 0.22 19 710 • 4,05 280 1 35 • 0,01 • 10 • 10 • 1 530 350
ST 41 9,4 1,67 55 30 1,0 10 0.87 < 0.5 2-3 205 162 2.59 10 < 1 0.42 20 0,12 1310 134)4 0,04 6 230 5354 30 2 10 0,02 < 10 • 10 95 150 1522 ST 42 50.2 0,38 250 50 0.5 20 6.43 10,5 10 378 488 1,49 < 10 1 0.05 • 10 0.03 105 2634 0,27 8 4370 • 6.97 340 1 33 • 0,01 • 10 20 150 230 550 ST 43 3,2 1,65 80 60 18.5 250 > 15.00 • 0.5 35 158 1254 4,20 10 • 1 0,26 < 10 0,67 1075 12 0.46 5 110 • 1,54 60 2 33 • 0.01 • 10 • 10 8 40 1156 ST 44 2.2 1,40 5 50 4.0 0 1,29 13.5 14 103 246 1,73 10 2 0.36 40 0,24 1095 11 0,13 2 160 702 5 3 32 0,05 < 10 • 10 10 20 1174 5T 45 5,2 4.68 65 240 4.5 < 2 2,3~ 3.0 21 51 807 5.96 |0 • 1 1,05 3O 0,57 2525 61 0,05 4 550 • 1.45 5 10 33 0.12 • 10 • 10 36 40 8226
ST 46 5.2 4.09 • 5 290 2,0 2 2.28 1.S 15 ~4 150 4.66 I0 • 1 1.00 20 0.39 1915 7 0,16 8 280 • 1.12 10 0 17 0.00 • 10 • 10 3O |0 1676 ST 47 1,0 2,41 10 50 0.5 70 0,76 • 0,5 21 107 124 6.93 10 • 1 0.50 10 0.54 88O 47 0.04 8 290 174 5 7 14 0.00 • 10 • 10 ~5 10 138 ST 48 47.2 4,92 65 240 1.0 58 3.70 4.0 36 64 0452 5,42 10 < 1 1.59 10 1.28 1800 11 0.21 19 590 • 1,81 5 11 96 0.00 < 10 • 10 66 10 • 100~D ST 49 7.6 0.55 30 20 4.0 580 • 15,00 • 0,5 12 206 * 1,7~ 2.94 • 10 3 0.11 • 10 0.04 70 44 0.62 6 < 2O9 322 10 1 9 0,01 < 10 < 10 27 140 150 ST 5O 66,4 0,5~ 105 10 2.5 340 • 15,00 1.5 26 100 * 4,65 2.41 • 10 • 1 8.00 • 10 0.00 45O 138 0,67 2 • 200 4052 25 2 9 0,01 • 10 • 10 98 < 10 1066 APPENDIX C
NEUTRON ACTIVATION MULTI-ELEMENT ANALYTICAL DATA FOR SAMPLES ANALYZED BY BONDAR-CLEGG & COMPANY LTD.
iI! i ilJ
21 Appendix C.--Neutron activation multi-element analytical data for samples analyzed by Bondar-Cle.q.q & Company Ltd.
[<, less than lower detection limit (some elements have elevated lower detection limits due to interference from other elements); >, greater than; ~, rerun values are given in Appendix B.]
ST Ol < 5 34 < 5 < 100 < 1 43 10 26 < 5O < 1 < 2 9,1 < 2 < 100 < 5 < 0,5 lO 0.12 ( 5O < 10 4.0 < 0.5 • 10 0.5 • 200 < 1 < 1 < 20 0.0 1.0 3O < 5 >20000 < 5O0 ST 02 < 5 43 < 5 < 100 < 1 10 10 33 < 50 < I < 2 2,5 < 2 < 100 2 < 0,5 ': 2 0.10 • SO < 10 4.4 0*7 • 10 1.2 • 200 < 1 < 1 • 20 0.5 1.1 32 • S 39130 < 500 ST 03 20 89 42 • 100 2 < 10 10 11 130 2 < 2 9,2 • 2 < 100 12 < 0,5 10 0.07 < 50 16 8.9 0.0 ,: 10 1.1 < 200 • I < I • 20 • 0.5 1.g 120 < 5 < 2(x) < 5(~ ST 04 • $ 83 • 5 • 100 1 < ~0 10 40 68 3 • 2 >10o0 < 2 < 100 g • 0,5 4 0.05 • 50 • 10 2.0 • 0.5 • 10 1.1 • 200 • 1 • I < 20 • 0.5 1.2 100 • 5 420 < 500 ST 05 • 5 172 10 < 106 2 < 10 10 64 96 < 1 • 2 >10°0 < 2 • 100 10 < O,S 15 0.06 ,c 50 < 10 0o3 1.0 • 10 1.0 • 200 • | • I • 20 • O.s 2.6 73 < 5 < 2(X) • 50O
ST 06 • 5 45 • 5 550 < I < 10 41 • 10 160 21 • 2 8,0 3 • |06 24 • O,S 4 0.22 ,~ 50 35O 11.0 4.0 • 10 4.2 < 200 • 1 • 1 • 20 6,7 3.5 4 < 5 2400 • 500 ST O? • 5 104 • 5 • 100 < I < 10 27 < 10 • 50 20 • 2 >10,0 • 2 < 100 14 • O,S 14 0.14 < 50 300 14.0 2.1 16 2.2 • 200 • I • 1 • 20 1,6 2.3 0 < 5 26O0 < ST 08 • 5 138 8 • 100 < I < 10 I0 31 • SO 1 < 2 >10,0 • 2 < 100 9 < 0,5 • 2 0.15 • 50 • 10 20.0 1.2 • 10 1.5 • 2O0 • 1 • I • 20 0.8 2,5 27 < 5 310 < 500 ST 09 7 232 9 • 100 1 < 10 10 44 73 3 • 2 >10,0 • 2 • 100 7 < 0.5 28 0.14 • 50 26 15.0 1.2 14 1.4 • 200 • I • 1 • 20 • 0.5 2.2 37 • 5 49O < 5O0 ST 10 • 5 336 10 < 100 3 • 10 10 43 100 < 1 • 2 >10.0 • 2 ,c 100 7 < 0,5 20 • 0,05 • 50 • 10 6.2 0,3 • 10 1,1 < 200 • 1 • 1 • 20 < 0.5 4.3 354 • $ < 2OO •
ST I1 10 199 < 5 • 100 < 1 • 10 10 59 • 50 2 • 2 >10,0 • 2 • 100 g < 0.5 17 o,0g • 5O • 10 11,0 1.0 38 1,g • 20O • 1 • I • 20 • 0,5 1,5 34 • 5 690 < 500 ST 12 • 5 118 • 5 • 15O • 1 • 10 10 140 72 2 • 2 >10,0 < 2 • 100 3O • 0,5 3 0,08 • 5O • 10 g,3 3,9 14 4,5 < 200 • 1 • 1 • 20 1,7 3,2 61 • 5 520 • 500 ST 13 • 5 14 • 5 640 1 • 10 39 27 170 3 < 2 g.O 5 • 100 21 < 0,5 28 0,3~ < 50 180 11,0 4,0 • 10 4°8 < 20¢ 2 • I < 20 15,0 4°8 8 • 5 SSO • 5O0 ST 14 < S 7 • 5 410 • ! < 10 65 51 g7 10 • 2 7,0 5 • 100 30 • 0,5 g 0,15 • 50 320 7,6 10o0 < 10 5,g • 200 1 1 • 20 11.0 3.0 5 < 5 540 < 500 gT 15 < S 11 • 5 460 7 • 10 61 29 83 13 • 2 5,3 0 • 100 25 • 0,5 S 0,17 < 50 220 11,0 0,7 • 10 5,0 < 200 1 • 1 • 20 12.0 3.2 3 • 5 2000 <500 gT 16 • 5 54 10 200 6 • 10 10 26 66 10 • 2 >10o0 < 2 < 100 12 • 0°5 63 • 0,05 • 50 110 19.0 2,9 < 10 ~,3 < 200 • 1 1 • 20 3,2 4,0 505 < S 200 < 500 ST 17 • 5 26 • 5 710 3 • 10 49 22 190 20 • 2 >10,0 • 2 < 100 25 • 0,5; 40 0.00 • 50 2?0 22,2 7.6 • 10 5.7 • 200 2 1 • 20 12.0 4.0 150 • 5 < 200 • 50~ 5T 18 < 5 36 • 5 • lO0 • 1 < 10 20 • 10 50 6 • 2 6,4 3 < 100 12 < O.S 26 0.16 • 50 23 5.4 3.0 • 10 3.0 • 200 • 1 • 1 • 2O 3.1 3.0 23 • 5 340 < 500 ST 19 • 5 2 • 5 150 < 1 • 10 79 • 10 320 2 < 2 0.0 5 • 100 45 0.6 6 3.20 < 5O 1(]0 0,7 3.2 < IQ 5,8 < 2OO 3 ! • 20 26,0 3,7 • 2 • 5 < 2OO • 50O ST 20 14 04 65 • S?O • I • 10 110 180 < 543 4 • 2 5,7 4 • lOG 63 • 0.5 18 4,60 < 20 37 1,9 3,0 • 10 • 4.g • 20O 3 • I • 20 2hO 173,0 5 • S • 2OO • 500
ST 21 < 5 454 3go < 480 2 • 10 75 180 50 4 • 2 5,3 S • 100 49 • 0,5 24 3,40 < 20 110 1,2 2,4 47 • 4,2 < 2O¢ 3 • 1 < 20 28,0 140.0 6 • 5 • 200 • SO0 ST 22 • 5 114 100 < 35O • I • 10 96 70 54 4 • 2 ?,6 $ • 109 70 < 0.5 35 3.60 < 20 1~ 2,2 2,0 • 10 • 3,4 < 200 3 • I • 20 26,0 106,0 10 6 < 200 < SO0 ST 23 • 5 631 140 < 100 • 1 • lO 10 620 106 1 < 2 ?,0 3 • 100 20 • 0,5 255 2,50 • 20 ?3 3.0 2,S 15 • 1,5 • 200 2 • 1 • 20 lg,O 54,1 0 < S • 200 • 500 ST 24 12 157 110 • 260 • 1 < 10 72 200 < 50 4 • 2 3,4 5 • 100 42 • O,S 45 4,60 • 20 $1 1,1 2,0 < 10 < 2,6 • 200 3 1 < 20 22.0 78.2 4 • $ • 206 • 500 ST 25 • $ 3 • 5 280 • 1 < 10 75 32 • 50 3 < 2 1,2 4 • 100 38 • OoS • 2 2.10 • 20 170 0.5 2.0 • 10 3.0 • 200 2 < 1 • 20 19.0 5.5 8 • 5 • 200 < 5C~
ST 26 • 5 35 38 • 100 < I • 10 30 42 04 6 • 2 2.5 < 2 • 15O 33 • 0.5 110 1.10 • 20 62 2.1 1.3 < 10 < 1,2 < 2QO 1 • 1 < 20 lhO 36,0 4 • 5 < 2O0 • 5O0 ST 2? • 5 3 ? 270 < I • 10 43 30 73 3 • 2 0.7 3 < 100 24 • 0.5 3 1.80 • 20 9] 0,8 1,6 < 10 2,6 <~2O0 2 • I < 20 14,0 ?,g 2 • $ < 20O < 50(3 ST 28 < $ 80 12 • 330 • 1 < 10 22 • 10 g? 22 • 2 5,3 • 2 • 106 14 • 0.5 1O0 0,69 • 20 4? 2,5 1,6 < 10 < 2,6 < 2OO 1 • I < 20 10,0 101,0 3 • 5 • 20O • 54)0 ST 29 • $ I0 15 160 • I • 10 60 30 59 3 < 2 1,6 3 • lO0 41 • 0,5 7 hTO < 20 91 2,2 2,2 • 10 2,4 • 20O 1 • 1 • 20 15,0 14.0 2 < 5 • 200 < 500 ST 30 < 5 7 13 330 • 1 • 10 ~7 32 65 8 • 2 1,1 4 < 100 30 < 0,5 4 2,10 • 20 120 1,1 2.2 • 10 3,1 • 200 2 • 1 • 20 17.0 9.2 2 • $ • 200 < 5¢0
ST 31 < 5 2 < S 250 < 1 • 10 61 10 69 4 < 2 1,1 4 < 100 34 • 0,5 • 2 2.30 • 20 92 0,0 2,3 • 10 3,4 • 200 2 • 1 • 20 12,0 5,4 • 2 • 5 < 200 • 500 ST 32 • 5 18 5 170 • I • 10 65 12 85 9 • 2 2,5 5 < 100 33 • O,S 6 3.00 • 20 15O 0.8 2,4 • 10 2,3 • 200 2 • I • 20 21.0 2g.0 • 2 • 5 • 200 • SO0 $T 33 < 5 25 16 24O • 1 • 10 83 < 10 < 5O 2 • 2 1.0 5 < 100 53 • 0,5 3 3.90 < 20 150 0o8 3.1 • 10 2,7 • 200 2 • I • 20 21,0 34.0 • 2 • $ • 200 • 500 3T 34 • 5 1 • 5 410 ? • 10 70 < 10 93 3 • 2 1,0 5 • 100 36 • 0,5 • 2 2o00 < 20 160 0.4 2.2 • ~0 4.4 • 200 2 • I • 20 14,0 4,1 < 2 • 5 • 200 < 500 ST ~5 < $ 4 < 5 • 100 • 1 • 10 69 • 10 60 < 1 < 2 3,0 6 • 15O 31 • 0,5 • 2 5,88 • 20 18 0,8 2,4 • 10 2,0 < 200 3 • 1 • 20 25,0 56,2 4 • 5 • 200 • 500
ST 36 10 64 12 380 ! • 10 46 22 190 5 • 2 3,7 4 • 100 15 • 0,5 39~ 0,02 < 50 30¢ 34,$ 3,5 • 10 2,7 • 200 1 • I • 20 17,0 16,0 55 • 5 2200 • 506 ST 37 15 75 20 350 4 • 10 10 < 10 3OO 3 • 2 5,5 3 < 15O 15 • 0.5 307 " 0,07 • 50 23¢ 92,7 4,8 • 10 2,3 • 200 • 1 < I • 20 12,0 17,0 170 • 5 2700 < 600 ST 38 10 30 33 740 • 1 46 lg 73 72 4 < 2 >10.0 3 < I00 12 < 0.5 2? 0,09 110 220 10,0 13,0 • 10 5°5 < 200 < 1 2 • 20 1,9 14,0 52 G 9200 < 500 ST 39 >50 86 130 330 3 • 10 10 23 lo0 3 < 2 g*3 < 2 • I00 12 • 0,5 lglO • O,OS • 50 160 93,6 4,0 • 10 2,0 • 200 • I < 1 • 20 6,0 20.0 221 < $ 4900 • 500 ST 40 >5O 11'2 23 200 6 • 21 35 • 10 50O < I • 2 0,8 • 2 < 15O 6 < 0,5 13500 • 0,05 • 50 < 10 506,0 • 0,5 • 10 3,2 • 730 • I 1 • 69 1,9 6,7 435 13 • 206 • SO0
ST 41 14 34 39 230 4 • 10 20 16 360 2 • 2 2,1 4 < 109 16 0,6 1270 0,29 • SO 260 92,2 1,0 • 10 2,6 < 200 2 1 • 20 14,0 4.5 120 • $ 1500 < 50¢ ST 42 48 240 40 • 100 0 • 10 27 • 10 450 • 1 • 2 1.4 • 2 < 100 ? < 0,5 2470 • 0,05 < 50 • 10 522,0 • 0,5 • 10 1,4 < 620 • 1 • 1 • 62 1.2 44°0 120 14 350 • 500 ST 43 19 04 070 • 100 3 < 10 27 25 240 4 • 2 4.3 • 2 < 100 17 • 0,$ 18 0,06 • 50 28 94,4 1,2 < 10 4,8 < 2OO • 1 1 • 20 2,3 13,0 42 9 1300 • 500 ST 44 • 5 13 55 200 < 1 15 70 < 10 190 2 • 2 1.7 6 ~: 100 35 • 0,5 13 l,gg < 50 170 $°8 3,() < 10 6,2 • 200 2 • I • 20 13,0 9,0 22 • 5 1100 < 506 ST 45 6 24 57 570 2 • 10 $5 10 110 5 < 2 5,~ 4 • 100 34 0.6 67 0.11 < SO 15O 32.] 10,0 < I0 8,1 < 2OO • 1 2 • 20 10,0 7,6 46 6 9313~ < 5O0
ST 46 5 22 26 430 IS • 10 43 • 10 140 9 • 2 4,6 3 < 15O 20 • 0.5 10 0.16 < 50 23O 34.5 8.4 • 10 3,9 < 2OO • 1 < I < 20 6,7 4,7 22 < 5 1700 < 50Q ST 47 • $ 3 6 430 < 1 • I0 10 12 210 3 • 2 ~.6 5 < 15O 14 < 0,5 71 hlO • 50 2643 3.8 8,4 < I0 2,3 • 2OO 2 < 1 < 2O 12.0 4.6 36 < $ < 206 < 500 ST 40 46 7 150 330 • 1 < 10 21 27 94 2 • 2 4.7 • 2 • 100 12 • 0,5 15 0,36 < 5O 170 4,7 9,1 < 10 2.4 • 2OO • I • 1 • 20 2*5 1,3 17 • $ 110(~ < 5OO ST 49 15 26 690 < IO0 l < 10 10 • 10 3~ • 1 • 2 2,8 • 2 • 100 < 5 • 0,5 5.8 < 0,05 < 50 < 10 10,0 1,0 < 10 1,0 • 200 • 1 • 1 • 20 hO 2,9 1.50 < $ • 206 • 5O0 ST 50 >SO lOS 3~10 • 100 • 1 • 10 10 18 190 < I • 2 2,3 • 2 • 15O • 5 • 0,5 170 • O,OS • 50 < 10 26,2 1,0 < 10 1,G • 200 < 1 • I < 20 • 0.$ 11,0 23 < $ 930 • 50~ ! i!i!'| ~
!!!!~i|
!
APPENDIX D ! DATA FOR INDIVIDUAL MINES AND PROSPECTS IN THE SANTA TERESA ! MOUNTAINS UNIT, CORONADO NATIONAL FOREST, GRAHAM COUNTY, ARIZONA !
i,~:I 23 ! I
I I
I Mine Name or Mineralized Area ! Cowboy Tunnel Location
North of Cobre Grande Mountain. I SW. 1/4 sec. 22, T. 5 S., R. 20 E. II Production Vague account of one carload (about 60 st) of copper ore that averaged about 8 % ! copper, before 1920.
Development
II Adit with over 300 ft of workings, in addition a winze 46 ft deep, 1 short raise, 2 small stopes.
! Current Status ! Inactive. Miscellaneous
! Fig. 3, samples ST 2-12. About 800 st of dump.
! Geologic Description and Ore Mineralogy
Irregular replacement zones in limestone and altered limestone; abundant iron ! stains, limonitic clayey gouge, pyrite; also chalcopyrite, chalcocite, chalcanthite, specularite. Simons (1964) shows this mine to be on or adjacent to the intersection of the Goodwin Canyon Fault and the Cobre Grande Fault in ! Mississippian Escabrosa Limestone, adjacent to Precambrian Pinal Schist and Tertiary Goodwin Canyon Quartz Monzonite.
! References
Ross, 1925, p. 102-103. | Simons, 1964, p. 135-136, plate 1. I
! 24 i Mine Name or Mineralized Area
Unnamed adit, Cobre Grande Mine
I Location
North of Cobre Grande Mountain. I NW. 1/4 sec. 27, T. 5 S., R. 20 E. I Production Small, if any.
I Development I Adit, caved at 205 ft from portal, reported by Ross (1925) to be over 700 ft long. Current Status I. Inactive. I Miscellaneous Fig. 4, samples ST 13-18. I Geologic Description and Ore Mineralogy Altered Pinal Schist Simons (1964); prominent faults, clayey gouge, abundant I limonite, specularite, epidote, minor malachite stains. References
I Ross, 1925, p. 102. Simons, 1964, p. 136. I "1 I ~1
25 i~~ I !
i I Mine Name or Mineralized Area l Prospect pit, Cobre Grande Mine Location
North of Cobre Grande Mountain. I SE. 1/4 sec. 21, T. 5 S., R. 20 E. I Production None.
I Development I Small pit. Current Status
I Inactive. I Miscellaneous Fig. 2, sample ST 1. I Geologic Description and Ore Mineralogy I Skarn zone in limestone; epidote, actinolite, garnets, iron and manganese stains. References I None. I l
!i I
26 t I Mine Name or Mineralized Area I Unnamed adit Location I Upper Fisher Canyon. SE. 1/4 sec. 6, T. 6 S., R. 21 E. I Production Probably none.
I Development I Adit, 35 ft long, 15-ft-deep winze. Current Status
I Inactive. I Miscellaneous Fig. 6, Sample ST 20. I Dump about 100 st. Geologic Description and Ore Mineralogy I Mineralized shear zone in granite; abundant chrysocolla, hematite; minor chalcopyrite. I References I Ross, 1925, p. 103-105. I
!i:~i|
27 Mine Name or Mineralized Area I Unnamed adit Location I Upper Fisher Canyon. SE. 1/4 sec. 6, T. 6 S., R. 21 E. I Production Small, if any.
I Development I Adit, 50 ft long; 9-ft-deep winze, short raise to surface. Current Status
I Inactive. t Miscellaneous Fig. 6, samples ST 21-23. I Dump about 200 st. Geolo.qic Description and Ore Mineralogy I Irregular zones of altered granite with chrysocolla and hematite, granitic country rock.
! References I Ross, 1925, p. 103-105. ii
i ~ ili. 28 II ¸
I Mine Name or Mineralized Area I Unnamed adit Location I Upper Fisher Canyon. SE. 1/4 sec. 6, T. 6 S., R. 21 E. I Production Small, if any.
I Development
~| Short adit.
Current Status
I Inactive. I Miscellaneous Fig. 5, sample ST 24. Deep water in adit, not mapped. I Dump about 200 st. I Geologic Description and Ore Mineralogy Irregular zones of altered granite with chrysocolla and hematite, granitic country I rock. References I Ross, 1925, p. 103-105. I I
29 I
t Mine Name or Mineralized Area I Unnamed adit Location I Upper Fisher Canyon. SE. 1/4 sec. 6, T. 6 S., R. 21E. I Production Small, if any
I Development i Adit, 300 ft of workings. ! Current Status Inactive. I Miscellaneous Fig. 7, samples 25-31. I Dump about 600 st. Geologic Description and Ore Mineralogy I Prominent fault plane in altered and weathered granitic rock; common hematite, small, irregular zones of chrysocolla. I References ! Ross, 1925, p. 103-105. I ~| |
I 30 I iI: II • I
Mine Name or Mineralized Area
Unnamed adit
Location
Upper Fisher Canyon. SE. 1/4 sec. 6, T. 6 S., R. 21 E.
Production
Probably none.
Develooment
Adit, 65 ft long.
Current Status
Inactive.
Miscellaneous
Fig. 7, samples ST 32-34. Dump about 75 st.
Geologic Description and Ore Mineraloav
Prominent fault fissures in granitic rock; small, irregular zones of chrysocolla and hematite.
References
Ross, 1925, p. 103-105.
31 I
I Mine Name or Mineralized Area I Dogwater Mine Location I Near Laurel Canyon, SW. corner of Forest. NW. 1/4 sec. 33, T. 6 S., R. 20 E. I Production 160 st of ore concentrates in 1920.
I Development I Adit, caved, 140 ft long with stope to surface. Current Status
I Patented claim, inactive.
Miscellaneous
Remains of old mill site nearby. I Fig. 8, sample ST 40. Geolo.qic Description and Ore Mineralo.qy I On Grand Reef Fault structure, trending N. 25 ° W., near vertical dip, 2-4 ft thick; altered, brecciated, silicified igneous rock. Ore minerals were wulfenite, cerussite, galena, argentite; abundant fluorite in gangue. Cretaceous or Tertiary Horse I Mountain Volcanics (Simons, 1964). References
I Ross, 1925, p. 79-85. I Simons, 1964, p. 147, 148, plate 1. I
'1 32 I !
Mine Name or Mineralized Area I Unnamed adit Location I About 900 ft N.-NW. of Dogwater Mine. NW. 1/4 sec. 33, T. 6 S., R. 20 E. I Production Possible small production.
I Development I 42-ft-long adit. Current Status
I Patented claim, inactive. I Miscellaneous Figure 9, samples ST 36-39. I Geolo.qic Description and Ore Mineraloav Major shear zone, likely part of Grand Reef structure, oriented N. 18 W., 84 ° I SW., 3-4 ft thick, between diabasedike and altered, bleached rhyolite. Shear zone consists of altered, brecciated, silicified rhyolite, abundant limonite and gouge, galena. Rocks are shown by Simons (1964) to be in Cretaceous- or I Tertiary-age Horse Mountain Volcanics. References
I Simons, 1964, plate 1. E I
33 i
!l Mine Name or Mineralized Area I Unnamed open cut Location I About 600 ft northeast of Dogwater Mine. NW. 1/4 sec. 33, T. 6 S., R. 20 E. I Production I Small, if any. Development I Shallow open cut about 150 ft long. Current Status
I Inactive. I Miscellaneous Figure 8, samples ST 41-42.
I Geolo.qic Description and Ore Mineraloav
Fault zone up to several ft thick, silicified breccia within gouge and breccia; I between contact of rhyolite and Santa Teresa Granite. Galena, malachite, and wulfenite in small ore stockpile.
I References I Simons, 1964, plate 1. I il
I 34 I I
I Mine Name or Mineralized Area I Unnamed adit Location I About 2,000 ft E.-SE. of Dogwater Mine. NW 1/4 sec. 33, T. 6 S., R. 20 E. I Production None.
I Development I 35-ft-long decline. Current Status
I Patented land, inactive. I Miscellaneous Fig. 10, sample ST 43.
I Geologic Description and Ore Mineralogy Schist (likely Pinal Schist), altered, sheared, brecciated gouge, limonite, minor I malachite stains. I References Simons, 1964, plate 1. I I I I
35 I I Mine Name or Mineralized Area I Unnamed caved adit. Location i About 2,300 ft E.-SE. of the Dogwater Mine. NW 1/4 sec. 33, T. 6 S., R. 20 E. I Production None.
I Development I Adit, caved, approximately 40 ft long judging from dump size. Current Status
I Patented land, inactive. I Miscellaneous Fig. 8, sample ST 44.
I Geologic Description and Ore Mineralogy
Contact between schist and granite, likely Pinal Schist and Santa Teresa Granite; I altered and bleached granite, altered and iron-stained schist. I References Simons, 1964, plate 1. I I I
36 I I
I Mine Name or Mineralized Area I Unnamed adit Location I About 2,400 ft E.-SE. of Dogwater Mine. NE. 1/4 sec. 33, T. 6 S., R. 20 E. I Production None
I Development I 25-ft-long adit. Current Status
I Patented land, inactive. I Miscellaneous Figure 10, samples ST 45-46.
I Geologic Description and Ore Mineralogy
Shear zone in schist, likely Pinal Schist, strike varies from N. 35 ° W. to N.-S., dip I 80 ° NE. to vertical; altered, bleached schist, breccia, limonite stains, 2-in.-thick zone of disseminated galena. I References I Simons, 1964, plate 1. I
37 I
0 i I Mine Name or Mineralized Area I Unnamed pit Location I Upper Waterfall Canyon. NW. 1/4 sec. 34, T. 6 S., R. 20 E. I Production None.
I Development I Prospect pit, 10 x 8 x 3 ft deep. Current Status
I Inactive. I Miscellaneous Fig. 8, sample ST 47. I Geolo.qic Description and Ore Mineralogy Sheared and altered zone between Pinal Schist and Santa Teresa Granite; breccia, I gouge, limonite. I References Simons, 1964, plate 1. I I I
38 t Mine Name or Mineralized Area I Unnamed open cut Location I Near upper Klondyke Wash. SE. 1/4 sec. 34, T. 6 S., R. 20 E. I Production None.
I Develooment I Open cut, 15 ft wide, 8 ft deep. Current Status
I Inactive. I Miscellaneous Fig. 8, sample ST 48. I Geologic Description and Ore Mineralogy Wide shear zone in Pinal Schist, highly altered rock, bleached, breccia gouge, I limonite; mineralized zone containing azurite, chrysocolla, malachite. References
I Simons, 1964, p. 149. I I
39 I
Mine Name or Mineralized Area I Unnamed trench Location I Ridge between upper Klondyke Wash and Spring Canyon. SW 1/4 sec. 34, T. 6 S., R. 20 E.
Production
None.
I Developmen..t I Trench, 20 x 10 x 3 ft deep, mostly sloughed in. Current Status
I Inactive. I Miscellaneous Fig. 8, sample ST 49. I Geologic Description and Ore Mineralogy I Silicified Pinal Schist, minor chrysocolla; hematite, limonite, manganese stains. References I Simons, 1964, p. 149. I
I
40 I Mine Name or Mineralized Area I Unnamed prospect pit Location
Ridge between upper Klondyke Wash and Spring Canyon. I SW. 1/4 sec. 34, T. 6 S., R. 20 E. I Production None.
I Development I Pit, 15 ft diameter, 5 ft deep, mostly sloughed in. Current Status
I Inactive. I Miscellaneous Fig. 8, sample ST 50. I Geoloqic Description and Ore Mineralogy Small stockpile containing silicified schist, calcite, abundant chrysocolla, minor I limonite, hematite, manganese stains; country rock Pinal Schist. References
I Simons, 1964, P. 149. I I I I I 41 I Mine Name or Mineralized Area Grande Reef Mine
I Location
Laurel Canyon, about 300 ft west of Forest boundary. I E. 1t4 sec. 29, T. 6 S., R. 20 E. I Production Approximately 40,000 st of ore that averaged 8-9% lead, 1-2% copper, 7 oz/st I silver. Development I More than 4,000 ft of underground workings, main adit level about 1,400 ft long, a 300-ft-deep winze with sublevels at 100 ft intervals; stope 200 ft above main I level to surface, 70 ft below main level. Current Status I Patented claim, inactive. Geologic Description and Ore Mineralogy
I A great mass of iron-stained, brecciated, silicified rock and vein material, up to 200 ft thick, strike N. 12 ° W., dip ranges from 70 ° W. to vertical. Country rock altered rhyolite. Galena is most abundant sulfide with argentite, chalcopyrite, and I minor sphalerite and chalcopyrite, most of the ore has been oxidized. Supergene minerals include cerussite, anglesite, malachite, azurite, and chrysocolla.
I References
Ross, 1925, p. 78-85. I Wilson, 1960, p. 60-62. Simons, 1962, p. 146-147. I I
42 | I
I Mine Name or Mineralized Area Copper Bar and Sam Jones prospects.
I Location
Copper Canyon. I SW. 1/2 sec. 32, T. 5 S., R. 20 E. I Production 15 st of handpicked chalcocite ore containing 29.7% copper and several dollars I worth of gold and silver, in 1902. Development
I 2 adits, the largest, the Sam Jones, about 1,400 ft of workings; the other, Copper Bar, has 200 ft of workings and a winze, with a shaft near portal 100 ft I deep. Current Status I Patented claim, inactive. I Miscellaneous Permission not granted to examine claim. I Geelogic Description and Ore Mineralo.qy Copper Bar workings on a breccia reef 20-30 ft wide that cuts Pinal Schist, consisting of brecciated rhyolite and Pinal Schist cemented by specularite; minor I pyrite and malachite stains; considerable chalcocite was reported in upper 25 ft of shaft and chalcopyrite appeared near the bottom. The Sam Jones adit begins in silicic dike rock, crosses a northwest-trending fault, then enters and ends in I Escabrosa Limestone; sparse copper and iron stains. I References Ross, 1925, p. 92-95. I Simons, 1964, p. 136-137. I I 43 I
| i i
APPENDIX E I MINE LOCATION AND MINE MAP FIGURES FOR THE SANTA TERESA MOUNTAINS UNIT, CORONADO I NATIONAL FOREST, GRAHAM COUNTY, ARIZONA I
i
44 ' !:m
ii!!i!~iI I I I '\ "" .. ~ ...... _'~.. -.., CoWboy Tqnne!/ I ! I |
/,I ¸¸ i7|
I Scale 1"-- 1040' I I I I -N- I 0 FEET 1000 2000 3000 4000 I Figure 2.-Mines and prospects near Cobre Grande Mountain I showing sample localities ST 1-18. 45 I m l m l ~ m BB m +m m m m m m m m m m +m
s'r2 -N- Major mineralized zone stoped on; up to 4 ft. thick I t 1 ST12 -~ 20 0 20 feel \ % \ Stope 11 ft. above sill level
O) l ST5 -',
51"11 ~
Irregular zone Fault contact between 5-1.3 ST8 competent Is. on footwall side, altered & intensely Fe stained rock hanging wall side ,3S
5O Vertical raise Winze ST7 \ about 15 ft. up 46 ft. deep in competent Is.
Altered rock
Figure 3.--Cowboy Tunnel showing sample
localities ST 2-12. Fresh is. I I I I I I I I I I I I I I I I I I :i:I
( srl e X ~'~ X ,.,~
-N-
I I I 20 0 20 fee-t-
4~ All of rock in atilt 5T15 35 is altered & clayey S'1"16
5"1"14
Figure 4.--Adit southeast of the Cowboy Tunnel showing sample localities ST 13-18. I <. I I I
I k ~ ;., ;, ~ ..... "~ ~" ""\ ~ ~"\ I i\ ~ r i "~ I ~ ~ , • I I ...... ;k "] / ~ [~f-ST24 ~\, \ , "-, sr2s-31,,~ I / ', ...... " I I I I I
I Scale 1".- 1000' I I I I -N- I 0 FEET 1000 2OO0 30OO 4OOO
I Figure 5.--Fisher Canyon mines and prospects showing sample I localities ST 20-35. 48 I -N- I I 20 0 20 fee-I- I
' I f 15-ft-deep flooded / shaft | ~'~ -~-~ MineraUzedshear |
Granitic country rock ,' Selectsample from stockpile
to surface ST22 ~Raise
Grab samplefrom J stockpile
ft-deepwinze
Figure 6.-Adits in Fisher Canyon showing sample localities ST 20-23.
49 -N-
,I I ~o,°°+ I
I ILoose2 0 . . I I
I _~ ,,+, ,,+n+ ,+,,
, I -N-
I I I I 20 0 20 fee-I- I Figure 7.-Adits in Fisher Canyon showing sample I localities ST 25-34. 50 I , ? I ,j I I I ,,~, ~".; ~ ....~,...... : i' (". ,.-. ,7; J" ,' iF'-.-, I k ]3 '--J.J ( .i) S t \3_3l 34 ". ~ ~)~ ...... -'~? ,.J/ {
I ,, -L L-~:DogW~r Mihe\ , , "~,~,+ -, _. .. /- , ..... / .,~" )~,,, ~.-___J ,,,..',~,.f~, . ~,,.,.~ ,\ ....
W' ~.~ ~43 -~," "~-. "...... - ',,,~ ~._ ~ .... , ,,2 f--- <-' /
I r--.~..-.~ w \ WE,/ ~ST4t~4 ~ ~ ~--/ -- ..... -" : : --
~k..-.~ I I ! ( . I: .... ,,?t" I
*.~ -- ~'~'./~"s r -x . .---",~--'" r ./ ./ ~ / ~,~ , k4-al~lHQI I ..~ Jl~ ~ ! \ ...... u.~_._...... S ,,,~ ,J<,-' l "~" " "~,-,~ ;" r,_...~~-'--' .__.,--._..~fy~,: t.,,-st49 /--'-""--
I T~ I I I
I
Scale 1"-- 1950' I I I I I I -N- 0 FEET 2000 4000 6000 8000 I
I Figure 8.-Mines and prospects in the southwest part of the Forest showing sample localities ST 36-50.
I 51 I I
I -!- I ~ I i -I 20 fe~f I
I rBsl¥oiea;~~~ Diabaso ,
?~ 51"37
<
Figure 9.-Adit north of the Dogwater Mine showing sample localities ST 36-39.
52 I I -N-
I i I I 2O 0 20 fee-I I
/ / I Altered / sheared schist / / I J / / I / ST~ -~ i / II +/ / ST43 / / Altered schist I J / / Alluvium I / / / I / / \
Figure 10.-Adits ESE. of the Dogwater Mine showing sample localities ST 43, 45-46.
53 • 1
OPEN FILE REPORT U,S. DEPARTMENT OF THE INTERIOR MLA 26-93 BUREAU OF MINES PLATE 1
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