Progress of Investigations of Mineral Resources of Alaska
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Bulletin No. 284 Series A, Economic Geology, 72 DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY CHARLES D. WALCOTT, DIRECTOR REPORT ON PROGRESS OF INVESTIGATIONS OF MINERAL RESOURCES OF ALASKA IN 1905 By ALFRED H. BROOKS AND OTHERS WASHINGTON GOVERNMENT PRINTING OFFICE 1906 b x i > CONTENTS. Page. ADMINISTRATIVE REPORT, by Alf re'd H. Brooks................................ 1 Introduction ...........................^.............................. I Progress of surveys.....................^. ........................... 2 General.......................................................... 2 Southeastern Alaska............................................... 2 Yakutat Bay...................................................... 2 Controller Bay.................................................... 2 Prince William Sound.............................................. 2 Cook Inlet........................................................ 3 i '" Southwestern Alaska............................................... 3 Seward Peninsula.................................................. 3 ^ Yukon-Tanana region.............................................. 3 THE MINING INDUSTRY IN 1905, by Alfred H. Brooks........................... 4 Introduction.......................................................... 4 Distribution of mineral wealth.......................................... 5 Auriferous lode mining................................................. 6 Gold placers....,..:.................................................. 7 Copper............................................................... 8 Coal.................................................................. 9 Lesser minerals........................................................ 9 " RAILWAY ROUTES, by Alfred H. Brooks...................................... 10 Introduction...........................................:.............. 10 Geographic control of routes............................................ 11 & Lynn Canal and Tanana Valley route.................................... 11 Yakutat Bay-Alsek route.............................................. 12 ^ Route from Cordova Bay to Eagle by way of Copper River................. 13 Valdez Inlet-Marshall Pass-Eagle route................................... .14 }- Resurrection Bay-Sushitna Valley-Fairbanks route......................... 15 Routes from Cook Inlet to Yukon River.................................. 16 Summary.............................................................. 17 MARKETS FOR ALASKA COAL, by G. C. Martin................................. 18 Introduction.......................................................... IS Present consumption of fuel............................................ 18 Amount and sources................................................ 18 i Disposal.......................................................... 18 Probable increase in consumption........................................ 19 r Local sources of supply................................................. 20 Anthracite and bituminous......................................... 20 * Bering River.................................................. 20 * Matanuska River.............................................. 20 ' - Other bituminous fields........................................ 20 Lignite........................................................... 20 in IV v CONTENTS. « MARKETS FOE ALASKA COAL Continued. Page. Competition with petroleum............................................ 21 Use of petroleum in Alaska........................................ 21 Effect of California petroleum on Pacific coast coal trade............... 21 Capability of coal to compete with petroleum................ ...... .. 23 Relative adaptability.......................................... 23 Relative efficiency............................................. 23 Relative prices................................................ 25 Supply available............................................... 26 Competition with imported coal......................................... 27 LODE MINING IN SOUTHEASTERN ALASKA, by F. E. and C. W. Wright........... 30 Introduction.......................................................... 30 Geography........................................................... 30 Geology......................................'........................ 30 Ore deposits.......................................................... 31 Gold............................................................. 31 Juneau district................................................ 31. Berners Bay............................................... 31 Yankee Basin............................................. 34 Eagle River............................................... 35 Petersou Creek............................................ 36 Windfall Creek............................................ 36 Montana Creek............................................. 36 Lemon Creek............................................. 37 Salmon Creek............................................. 37 Gold Creek............................................... 37 Sheep Creek.............................................. 38 Douglas Island............................................ .39- Admiralty Island.......................................... 40 Mines south of Taku Inlet.................................. 40 Ketchikan district............................................. 41 Kasaan Bay.......'-.............................-........ 41 Hollis..'.................................................. 42 Dolomi .........................................^......... 43 Dalllsland............................................... 43 Gravina Island............................................ 44 Revillagigedo Island....................................... 44 Cleveland Peninsula....................................... Unuk River............................................... Skagway district.............................................. Porcupine Creek........................................... Lituya Bay............................................... Wrangell district.............................................. Sitka district.................................................. Copper........................................................... Ketchikan district............................................. Kasaan Peninsula......................................... Kasaan Bay.............................................. Karta Bay................................................ Skowl Arm............................................... Cholmondeley Sourid....................................... Niblack Anchorage........................................ Hetta Inlet........................^...................... Gravina Island............................................ Wrangell district.............................1................ CONTENTS. V LODE MINING IN SOUTHEASTERN ALASKA Continued. Page. Ore deposits Continued. Silver, lead, and zinc ............................................... 53 Wrangell district.............................................. 53 Ketchikan district............................................. 53 NONMETALLIO DEPOSITS OF SOUTHEASTERN ALASKA, by C. W. Wright............. 55 Introduction.......................................................... 55 Marble............................................................... 55 Prince of Wales Island............................................. 56 Revillagigedo Island............................................... 57 Ham Island....................................................... 57 Limestone............................................................ 57 Granite.............................................................. 57 Gypsum.............................................................. 58 Coal................................................................. 59 Mineral springs ........................................................ 60 Thermal springs....................................................... 60 THE YAKUTAT BAY REGION, by R. S. TAJIK ................................... 61 Geography............................................................ 61 Stratigraphy.......................:......_-....-.--..-.-.---.-.---... 61. Crystalline rocks.................................................. 62 Yakutat series..................................................... 62 Coal-bearing beds.................................................. 62 Unconsolidated deposits............................................ 63 Economic geology..................................................... 63 Petroleum........................................................ 63 Coal............................................................. 64 Platinum......................................................... 64 Gold................-..;.................................,........ 64 DISTRIBUTION AND CHARACTER OF THE BERING RIVER COAL, by G. C. Martin...... 65 Introduction.......................................................... 65 Extent of the field..................................................... 65 Geologic sections...................................................... 65 Structural features..................................................... 68 Coal seams. ........................................................... 68 Anthracite........................................................ 68 Semianthracite or semibituminous................................... 70 Character of the coal..................................................