 | | Report (issue) | | CASSITERITE IN SAN DIEGO COUNTY, CALIFORNIA. By WALDEMAR T. SCHALLER. A small handful of cassiterite...crystals was found in the northern part of San Diego County, Cal. (fig. 22), in the spring of 1915, and the...showing position of cassiterite locality in San Diego County, Cal. The rectangle indicates the gem tourmaline...tin ore in place previously known in San Diego County. These are as follows: F. J. H. Merrill 1 has stated...black sand of the mountain gulches, chiefly from the east slope of Laguna Mountain, in the southern part |  | | Report (issue) | | Metallurgist MARK EHLE, Mining Engineer J. B. TENNEY, Geologist G. R. FANSETT, Mining Engineer R. E. S. HEINEMAN..."The Geology and Mineral Deposits of Southern Yuma County" is the most pretentious bulletin of the kind that...in many parts of the county, it has not been easy to prospect southern Yuma County at all thoroughly, but...___________________ _______ ___________ ___ __ ___ Colorado River________________________________ ______ ____...__________ . __ .____ _____ ______ __. General mining history_______________________ __________ ._______________ |  | | Report (volume) | | BUREAU OF MINES With a section on the THUNDER MOUNTAIN DISTRICT By B. F. LEONARD, U.S. GEOLOGICAL SURVEY,...______________________ Salmon River district ____________________________ Chamberlain district _____________________________...Edwardsburg district _____________________________ Ramey Ridge district ____________________________ Big Creek...Creek district ______________________________ Middle Fork district _____________________________ Monumental...Monumental Creek district _________________________ Marble Creek district ____________________________ Crags |  | | Report (issue) | | published information, field investigations, and mining company data. 2 ABBREVIATIONS USED IN THIS REPORT...billion percent short ton U.S. dollar gold silver copper lead zinc cobalt manganese iron uranium oxide...resources Mining districts Gibbonsville Mining District Indian Creek Mining District Mineral Hill Mining District...Mackinaw Mining District Blackbird Mining District Wilson Creek Mining District Yellowjacket Mining District...Range Mining District Eureka Mining District Carmen Creek Mining District Eldorado Mining District Pratt |  | | Report (volume) | | Director Bulletin 947-G COPPER DEPOSITS OF THE KOTSINA-KUSKULANA DISTRICT ALASKA BY RALPH E. VAN ALSTINE... Price 15 cents CONTENTS Page Introduction, Copper deposits of the Chitina Valley, by Fred H. Moffit__...geology.__________.i__________________________ Copper Creek.____________________________________________________..._.._ 124 Copper prospects._____________________________________________ Ammann prospect.__________...___________ Peacock prospect-_________________________________________ Mountain Sheep prospect______ |  | | Report (issue) | | Kofa Mountains lies in the central part of Yuma County, Ariz. These mountains cover an area of approximately...Castle Dome Range are the nearest. The Kofa mining district, from which the mountains derive their name...profitable treatment. -The mine produced gold and silver bullion to the amount of $3,500,000, gold greatly...Mayhew and sold shortly afterward to the Golden Star Mining Co. for $350,000. Development was soon started...United States, approximately $1,100,000 in gold and silver. The deserted camp of Kofa centers around the King |  | | Report (volume) | | --. ---- - --- - .A reconnaissance in the Kofa Mountain , Ariz., by E. L. Jon , jr. (pub] ished Oct. 26...reconnaissance of the Cottonwood -American Fork mining region, tab, by B.S. Butler and G. F. Loughlin...Preliminary report on t.he economic geology of Gilpin County, Colo., by E. S. Bastin and J. M. llill (publish..._·- ______ 59 111 PoTA H: Potash in certain copper and gold ores, compiled by B. S. Butler (published..._____ .. __ . _.. ____. ___ a iterite in San Diego County, Cal., by W. T . chall er (published J an. 15, |  | Price, J. B., Hitzman, M. W., Nelson, E. P., Humphrey, J. D., Johnson, C. A. (2014) Wall-Rock Alteration, Structural Control, and Stable Isotope Systematics of the High-Grade Copper Orebodies of the Kennecott District, Alaska. Economic Geology, 109 (3) 581-620 doi:10.2113/econgeo.109.3.581 | Journal (article/letter/editorial) | | Systematics of the High-Grade Copper Orebodies of the Kennecott District, Alaska Jason B. Price,†,1,*...Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401 2 U.S. Geological Survey...Denver, Colorado 80225 Abstract The Kennecott district, Alaska, contained three important copper-(silver)... the Kennecott Copper Corporation recovered some 1.18 billion pounds (Blbs) of copper and around 9 million...million ounces (Moz) of silver from these deposits. The host rocks for the Kennecott deposits are part |
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