Coastal Glaciers of Prince William Sound and Kenai Peninsula, Alaska

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U.S. Government Printing Office, 1913 - 75 Seiten
 

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Seite 76 - A reconnaissance of the Cape Nome and adjacent gold fields of Seward Peninsula, Alaska, in 1900, by AH Brooks, GB Richardson, and AJ Collier. In a special publication entitled ''Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Seite 142 - Ransome, FL, and Calkins, FC, The geology and ore deposits of the Coeur d'Alene district, Idaho: Prof.
Seite 69 - Maps. *Alaska, topographic map of; scale 1 : 2,500,000; preliminary edition, by RU Goode. Contained in Professional Paper 45.
Seite 76 - Bulletin 284, 1906, pp. 132-141. The Kougarok region, by AH Brooks. In Bulletin 314, 1907, pp. 164-181. *Water supply of Nome region, Seward Peninsula, Alaska, 1906, by JC Hoyt and FF Henshaw. Water-Supply Paper 196, 1907, 52 pp.
Seite 30 - The gold and silver veins of Silver City, De Lamar, and other mining districts in Idaho.
Seite 64 - Lindgren, Waldemar, and Ransome, FL, Geology and gold deposits of the Cripple Creek district, Colorado: Prof.
Seite 70 - Bulletin 480, 1911, pp. 103-111. The Eagle River region, southeastern Alaska, by Adolph Knopf. Bulletin 502, 1912, 61 pp. The Sitka mining district, Alaska, by Adolph Knopf. Bulletin 504, 1912, 32 pp. The...
Seite 214 - The analyses show that the oxidized ore carries 14.58 ounces of gold per ton, or 2.34 ounces more gold than the unoxidized ore, and that all the silver has been leached out. In ore so rich such a concentration may result merely from leaching out of the substances other than gold; but, on the other hand, the analyses of the altered rock indicate that little leaching of the silicate minerals has taken place and that the oxidized portion was originally richer than the unoxidized, or else that some gold...
Seite 68 - Survey, from whom th«y can be obtained, free of charge (except classes 2, 7, and 8), on application. 2. A certain number are delivered to Senators and Representatives in Congress for distribution. 3. Other copies are deposited with the Superintendent of Documents Washington, 1).
Seite 116 - VERTICAL RELATION OF DEEP-SEATED ENRICHMENT IN GOLD TO CHALCOCITIZATION. In several of the great copper districts of the West gold is a valuable by-product. In another group of deposits, mainly of Tertiary age and younger than the copper deposits, silver and gold are the principal metals, and copper, when present, is only a by-product. But in some of these precious-metal ores chalcocite is nevertheless one of the abundant metallic minerals and constitutes several per cent of the vein matter.

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