Download or read book Volcanic Stratigraphy and Epithermal Mineralization of the DeLamar Silver Mine Owyhee County Idaho written by Robert Edward Thomason and published by . This book was released on 1983 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DeLamar Silver Mine is in the north-trending Owyhee Mountains of southwest Idaho. As part of the Silver City region it is included in the Basin and Range physiographic province. The lithologic units of the Silver City region, surrounding the DeLamar Silver Mine, are composed mostly of Cretaceous granitic rocks and Miocene volcanic rocks. The volcanic rocks which vary in composition from basalt to rhyolite are predominant in aerial extent. Regional structure is dominated by a set of N10-20°W trending oblique-slip, high angle faults and a less pronounced set trending N75°W. These faults may be related to crustal extension in the Basin and Range province and to rifting in the Snake River Plain. The mineral deposits of the Silver City region occur mostly as epithermal vein fillings of fractures and faults. The predominant trend of the veins is north-northwest. The DeLamar Silver Mine is in a complex Miocene volcanic sequence. Units of various compositions including basalt, latite, rhyolite, and andesite were emplaced as coalescing flows, exogeneous domes, and necks. A porphyritic rhyolite is the most widespread unit in the mine area. Epithermal silver and gold mineralization at DeLamar is most commonly concentrated in the well-fractured, silicified, upper part of the porphyritic rhyolite. The most continuous mineralization is below the clay-altered base of an overlying fine-grained banded rhyolite. Mineralogy of the deposit is dominated by sulfides and selenides. Naumannite is the dominant silver mineral commonly occurring as small disseminated grains in quartz. Other silver bearing minerals include; acanthite, argentopyrite, and pyrargyrite. Fine-grained free gold is highly disseminated in the gangue. Pyrite is the most dominant and widespread sulfide of the deposit followed in abundance by marcasite. The gangue consists almost entirely of quartz. Several varieties occur including lamellar quartz; white, gray, and black common vein quartz; and well formed crystalline quartz. Hydrothermal alteration minerals at DeLamar include sericite, secondary quartz, kaolinite, alunite, chlorite, and zeolites. Mineralogy of the veins and alteration at DeLamar suggests that hydrothermal solutions were probably at temperatures 100 to 300°C. These solutions are believed to have been highly diluted sodium-chloride waters closely related to the rhyolitic volcanism.

Download or read book The Geology Mineralization and Geochemistry of the Milestone Hot spring Silver gold Deposit Near the Delamar Silver Mine Owyhee County Idaho written by Ruth Anne Barrett and published by . This book was released on 1985 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Ore Deposits of the Silver City De Lamar Flint Region Owyhee County Idaho written by Arthur J. Pansze and published by . This book was released on 1975 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biennial Report written by Oregon State University. Department of Geology and published by . This book was released on 1981 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mineral Resources of the Blue Canyon and Owyhee Breaks Wilderness Study Areas Malheur County Oregon written by Dean B. Vander Meulen and published by . This book was released on 1990 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Ore Deposits of the Silver City De Lamar Flint Region Owyhee County Idaho written by Arthur J. Pansze (Jr.) and published by . This book was released on 1975 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Seventh Quadrennial IAGOD Symposium written by International Association on the Genesis of Ore Deposits. Symposium and published by . This book was released on 1988 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Quadrennial IAGOD Symposium written by International Association on the Genesis of Ore Deposits and published by . This book was released on 1988 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography and Index of Geology written by and published by . This book was released on 1986 with total page 1354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Mineral Resources of a Portion of the Silver City Region Owyhee County Idaho written by Roderick R. Asher and published by . This book was released on 1968 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Tactite Mineralization of the South Mountain Mining District Owyhee County Southwest Idaho written by Lawrence K. Freeman and published by . This book was released on 1982 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Mineral Resources of a Portion of the Silver City Region Owyhee County Idaho written by Roderick Roland Asher and published by . This book was released on 1968 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconnaissance Geology and Geochemistry of the Silver City South Mountain Region Owyhee County Idaho written by Earl H. Bennett and published by . This book was released on 1975 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Relations of Tectonics to Ore Deposits in the Southern Cordillera written by William R. Dickinson and published by . This book was released on 1981 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconnaissance Geology and Geochemisty of the Silver City South Mountain Region Owyhee County Idaho written by Earl H. Bennett and published by . This book was released on 1975 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology of the Couer D alene Mining District of Idaho written by Idaho Bureau of Mines and published by CreateSpace. This book was released on 2014-03-28 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mining historian Kerby Jackson introduces us to a classic mining work in this important re-issue of Idaho Bureau of Mines Bulletin 16. Unavailable since 1961, this publication was originally compiled by the Idaho Bureau of Mines and Geology and includes details on the mining of gold, silver and other minerals in the famous Coeur D'Alene Mining District in Northern Idaho. Included are details on the early history of the Coeur D'Alene Mining District, local tectonic settings, ore deposit features, information on the mineral belts of the Osburn Fault, as well as detailed information on the famous Bunker Hill Mine, the Dayrock Mine, Galena Mine, Lucky Friday Mine and the infamous Sunshine Mine. This volume also includes sixteen hard to find maps. Note: This edition is a perfect facsimile of the original edition and is not set in a modern typeface. As such, some type characters and images might suffer from slight imperfections or minor shadows in the page background.