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UNITED STATES DEPARTMENT of the INTERIOR GEOLOGICAL SURVEY Mineral Resources of the Alpine Lakes Study Area, Chelan, King, and K

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UNITED STATES DEPARTMENT of the INTERIOR GEOLOGICAL SURVEY Mineral Resources of the Alpine Lakes Study Area, Chelan, King, and K 0 UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Mineral Resources of the Alpine Lakes Study Area, Chelan, King, and Kittitas Counties, Washington By J. L. Gualtieri and George C. Simmons, U.S. Geological Survey, and H. K. Thurber and Michael S. Miller, U.S. Bureau of Mines With a section on Aeromagnetic Interpretation, by W. E. Davis, U.S. Geological Survey Open-file report 1973 This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey standards and nomenclature. STUDIES RELATED TO WILDERNESS WILDERNESS AREAS In accordance with the provisions of the Wilderness Act (Public Law 88-577, Sept. 3, 1964) and the Conference Report on Senate bill 4, 88th Congress, the U.S. Geological Survey and the U.S. Bureau of Mines are making mineral surveys of wilderness and primitive areas. Areas officially desig­ nated as "wilderness," "wild," or "canoe" when the act was passed were incorporated into the National Wilderness Preservation System. The act provided that areas under consideration for Wilderness designation should be studied for suitability for incorporation into the Wilderness System. The mineral surveys constitute one aspect of the suitability studies. This report discusses the results of a mineral survey of some national forest lands in the Alpine Lakes study area, Washington, that may be considered for wilderness designation. The area studied is on the crest of the Cascade Range in west-central Washington. CONTENTS Page Summary, by J. L. Gualtieri and George C. Simmons, U.S. Geological Survey, and H. K. Thurber and Michael S. Miller, U.S. Bureau of ninesVf-i-n/acj _ _________ __ ___________________________________________________ j.1 Introduction, by J. L. Gualtieri and George C. Simmons, U.S. Geological. ourvey ___ ___ _ _______ _______ ________ _________ _____ _______ _ ^ Location and geography 4 JE revious s tuuie s _ _ _ _ _ __ __ _________ ___ Q Present studies and acknowledgments 8 Geology, by J. L. Gualtieri and George C. Simmons, U.S. Geological Survey 10 Geologic setting 10 ___ __ ____ ___________________ _______ _ _ __ Xi.19 __________________________ ____________________________ j_^_19 OC.llJ.oL~"C / » Vl "1 O ^~ tmtf - » » __ __ ________ j_^1 9 IT e so as tin r oirmat ion * _____ _____ _____ _____ __ __________ ___ j_ j HndwlX-Ll.lt> QT fir -i TI e T7/-»rrna'l--Jr UJLllld LJLUll /ATI ____________________ __________________________ __ "~ __ ~" _____ J17 s Man 1C ^ocK~""~^~"~"~"~"~"~"~"'~~"~" "~"~" "~""~ "~""~ " " "~"~" " ""~ "~""~~"~""~~"~"~"'~ "~""~ ""~~"~"~"~""~~" "~"~" " J.^ mgaixs irericioti t e " "** « _ « _ »»__________.. .«.«.«.«.«..« «.«.«.«.*.«.«.«.«.«.«.«.«.«.«.«. x^ lieXf^i 1-LdgdU nn oViVk UL *-/-» (J ~ _ _ __ __________________ _ _ __ __ __ _ _ _ J-J1 i Granitic rocks of the Mount Stuart batholith 16 Metasomatic rock . 17 ^jjjjp ill D O -LI uG " " -"" " "* « ^ - » » - - j_ j Swauk Formation 17 Naches Formation 19 T\1/dL.lO _J j_(_c ... Qlrvt;""/4-i i,<-> _ _ _ _______ _______ _ _ _ __ __ _ __ _ _ ^_jj9O Keechelus Andes ite 21 Keechelus-related intrusive body 22 Ul-CL-lP-»-Q <->/-.-! Ld o U.J.K.t;A4~\rei __ _ __ _______________ _ _ __ __ _ _ t-t-99 Granitic rocks of the Snoqualmie batholith 23 r\ .*- 1-» /-* >» -v* /-k /-» i -. <-^ o A VJ L.llt±i. L (JClxo *-" Alluvium and other surficial deposits 25 ^-L.U1.C 4-«i-V»*-\ __. «.«._______«. __«..._«..._«. M ._.«...«..^_^ -»-. M.^.«..^«...M,.^ M...^.»^«. .«,«.«.«.«._«._»«...«, ^^0 ^ The Deception Creek fault zone 25 Area east of Deception Creek fault zone 25 Area west of the Deception Creek fault zone 27 Aeromagnetic interpretation, by W. E. Davis , U.S. Geological Survey 29 Mineral deposits 30 Go t:/., <-L. <-L. JLtig-j T-. /> _ _ ______ _____ _______________________ _______________ J\J^n Lode deposits 31 Placer deposits 34 (jeocnemicaj. gxp xoration "" ~~ j j Anomalous area~~ -- - - " -- -- - jo Bulls Tooth area 38 French Ridge 'area 39 _ _ __ "~ _____ _________________________________ tAH*« Paddy-Go-Easy Pass area 41 Van Epps Pass area 42 Esmeralda Peaks area 43 Page Geology Continued Geochemical exploration Continued Anomalous area Continued Gold Creek-Delate Creek area 44 Lemah Creek-Snoqualmie River-Gold Lake area 46 Chain Lakes area 47 Camp Robber Creek-Foss River area 48 Necklace Valley area 48 Other anomalous samples 49 Other commodities investigated 49 Geologic appraisal of mineral resources 51 Economic appraisal, by H. K. Thurber and Michael S. Miller, U.S. Bureau of Mines 53 History and production 53 Mineral commodities 56 Copper 56 Gold 57 Silver 57 Mining claims 58 Gold Creek-Mineral Creek area 58 Tinhorn Nos. 3 and 4 claims 62 East Tinhorn zone 64 Giant and Jack lodes 64 Transit workings 66 Silver King and Silver Queen claims 68 Miscellaneous prospects 68 Clipper-Crawford Creek area 68 Three Brothers zone 71 Red Face zone 74 Trout Lake area 74 Dutch Miller Gap-La Bohn Gap area 74 Dutch Miller mine 78 Miscellaneous prospects 80 Sprite Lake area 80 Claim No. 5 adits 83 Snow workings and Cabin adit 83 Lake adit 83 Lower adit 87 Elsner adits 87 Pass workings 87 North Lake workings 87 North Area workings 89 Skeeter Creek workings 89 Van Epps Creek-Solomon Creek area 89 Van Epps adit 91 Pickwick shaft 91 Meadow adit 91 Van Epps No. 3 workings 96 Ellen workings 96 Miscellaneous prospects 98 ii Page Economic appraisal Continued Mining claims Continued Fortune Creek area 98 HHY prospect 98 Benita claims 98 Miscellaneous prospects 102 Teanaway River-Ingalls Creek area 102 Navaho Peak area 108 South Navaho Peak workings 108 Miscellaneous prospects 108 Isolated, outlying prospects 113 References cited 129 111 ILLUSTRATIONS [Plates are in pocket] Plate 1. Geologic and aeromagnetic map of the Alpine Lakes area, Washington. 2. Sample locality map of the Alpine Lakes area, Washington. Page Figures 1-28. Maps: 1. Location of the area studied in this report 5 2. Areas containing numerous prospects, Alpine Lakes area 55 3. Prospects in the Gold Creek area 60 4. Tinhorn Nos. 3 and 4 claims 63 5. Underground workings, Giant lode claim 65 6. Transit workings 67 7. Silver King and Silver Queen claims 69 8. Prospects in the Clipper-Crawford Creek area 72 9. Prospects in the Trout Lake area 75 10. Mines and prospects in the Dutch Miller Gap-La Bohn Gap area 77 11. Dutch Miller mine 79 12. Prospects in the Sprite Lake area 82 13. Claim No. 5 adits 84 14. Snow workings and Cabin adit 85 15. Map of Lake adit area 86 16. Map of part of Lower adit workings 88 17. North Area workings 90 18. Mines and prospects in the Van Epps Creek-Solomon Creek area 92 19. Van Epps adit and Pickwick shaft 94 20. Meadow adit 95 21. Ellen workings 97 22. Prospects in the Fortune Creek area 100 23. HHY workings 101 24. Benita workings 103 25. Prospects in west section of Teanaway River-Ingalls Creek area 105 26. Prospects in east section of Teanaway River- Ingalls Creek area 107 27. Navaho Peak area 110 28. South Navaho Peak workings 111 IV TABLES Page Table 1. Miscellaneous prospects in the Gold Creek-Mineral Creek area ; 70 2. Miscellaneous prospects in the Trout Lake area 76 3. Miscellaneous prospects in the Dutch Miller Gap-La Bohn Gap area 81 4. Miscellaneous prospects and mineralized zones in the Van Epps Creek-Solomon Creek area 99 5. Prospects in the Fortune Creek area 104 6. Prospects in west section of Teanaway River-Ingalls Creek area 106 7. Prospects in east section of Teanaway River-Ingalls Creek area 109 8. Prospects in the Navaho Peak area 112 9. Isolated outlying lode and placer prospects 114 10. Analytical results of anomalous samples from the Alpine Lakes ~"" """ "" " _. _«__._ _ W » HH _ _ _____ _»»_ _ __» «__..»»..._._».._ _L.L J v STUDIES RELATED TO WILDERNESS WILDERNESS AREAS MINERAL RESOURCES OF THE ALPINE LAKES STUDY AREA, CHELAN, KING, AND KITTITAS COUNTIES, WASHINGTON By J. L. Gualtieri and George C. Simmons, U.S. Geological Survey, and H. K. Thurber and Michael S. Miller, U.S. Bureau of Mines SUMMARY 2 The Alpine Lakes area, about 324 square miles (839 km ), is rugged terrain on the crest of the central Cascade Range of Washington State. It includes the proposed Enchantment Lakes Wilderness of about 54 square miles (140 km ), the proposed Alpine Lakes Wilderness of about 196 square miles (508 km^), the area between the two proposed wildernesses, and a small area southwest of the proposed Alpine Lakes Wilderness, in parts of the Snoqualmie and Wenatchee National Forests. The study included reconnaissance geologic mapping, an aeromagnetic survey, geochemical sampling, and examination of mines, prospects, and claims. County records show that about 435 lode and placer claims, 60 of which are patented, have been located in the study area since the 1880's. Most mining claims lie near the edges of granitic intrusive masses along the west and south sides of the area. Although no established mining districts exist, mining claims are mostly in groups, and the study of mines and prospects was divided into nine areas containing most of the claims. A total of 23 tons of ore has been produced from three small mines in the area. Probably additional small production resulted from exploratory work in other areas but no records are available. U.S. Geological Survey personnel collected a total of 2,986 samples for analysis: 1,853 stream-sediment samples, 1,127 rock samples, and 6 panned concentrates. The entire area was systematically sampled and rocks were sampled in detail; areas in which anomalous amounts of metal were detected were examined to determine the source of the metals.
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