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Author :
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (359 download)
Download or read book Gold-bearing Skarns written by and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. J. Orris
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (161 download)
Download or read book Description and Grades and Tonnages of Gold-bearing Skarns written by G. J. Orris and published by . This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U. S. Department U.S. Department of the Interior
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781534627871
Total Pages : 66 pages
Book Rating : 4.6/5 (278 download)
Download or read book Gold-Bearing Skarns written by U. S. Department U.S. Department of the Interior and published by Createspace Independent Publishing Platform. This book was released on 2016-06-14 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold exploration efforts of the mining industry in the last few years have centered on discovery of skarn deposits, such as Battle Mountain Gold Company's Fortitude deposit in Nevada, and Elders Resources' Red Dome deposit in Queensland, Australia, as well as on discovery of disseminated, carbonate-hosted, or Carlin-type deposits. Carbonate-hosted gold deposits are generally much larger deposits than skarns but are of much lower grade. Bagby and others (1987) report median tonnage and grade values of 5.1 million tonnes and 2.5 g/t Au, respectively, for 35 Carlin-type deposits. Median tonnage and grade values for the 90 skarn deposits we report in this study are 0.279 million tonnes and 5.7 g/t Au, respectively. Some major gold skarns, such as the Lower Fortitude deposit, Nevada (5.1 million tonne, 10.45 g/t Au), and the deposit at Bau, Malaysia (2.4 million tonnes), however, contain more gold than many of the large, disseminated-type deposits and are thus extremely attractive as exploration targets. The geologic characteristics of gold-bearing skarn deposits have only recently been addressed (Meinert, 1988a, b, 1989). This paper presents descriptive and grade-tonnage information obtained from more than 90 deposits that have been referred to in the literature as "Au-bearing skarns," "Au-rich skarn," or "Au-skarn," in a format somewhat similar to models in Cox and Singer (1986) but as modified by P.B. Barton (written commun., 1986). These and many other deposits, generally referred to as gold skarns in the literature, are occasionally further differentiated into contact, or proximal, skarns and distal skarns (Sillitoe, 1983, 1987; Bonham, 1985). Special attention has been given to the mineral chemistry of gangue skarn minerals as they have previously proved useful in distinguishing skarn types. This paper consists of a geologic description of Au-bearing skarns, presented in a form modified from that established previously for Cu-, Zn-Pb-, and Fe-skarn descriptive models (Cox and Singer, 1986) to allow rapid comparison and contrast; grade-tonnage distributions of Au-bearing skarns; and a combination references-bibliography section.
Author : Edwin W. Tooker
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.3/5 (121 download)
Download or read book Gold in Porphyry Copper Systems written by Edwin W. Tooker and published by . This book was released on 1990 with total page 68 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 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.:/5 (319 download)
Download or read book U.S. Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kenneth L. Tanaka
Publisher :
ISBN 13 :
Total Pages : 494 pages
Book Rating : 4.3/5 (243 download)
Download or read book U.S. Geological Survey Bulletin written by Kenneth L. Tanaka and published by . This book was released on 1983 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: A workshop report on the rationale for airborne remote sensing in earth science in the next decade.
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ISBN 13 :
Total Pages : 686 pages
Book Rating : 4.3/5 (243 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1990 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gerald E. Ray
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.F/5 ( download)
Download or read book Skarns in British Columbia written by Gerald E. Ray and published by . This book was released on 1997 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Skarns in British Columbia have historically been important sources of iron, tungsten, copper, and gold. This publication begins with an introduction on skarn terminology and the problems of skarn identification. It then reviews a genetic model of skarn formation and presents descriptive profiles of eight types of skarn deposits; describes the database of at least 735 skarn occurrences in the province, and the number and distribution of skarns in British Columbia according to their associations, class, age, and distribution; and notes the ages of British Columbia skarns and the total production of various metals extracted from British Columbia skarns. Subsequent sections provide information on assays and metal ratios of mineralized skarns, skarn mineralogy, skarn mineral chemistry, chemistry of skarn-related intrusions, and the mapping and evaluation of skarns. The appendix contains a listing of 735 skarn occurrences in British Columbia, giving deposit name, MINFILE number, latitude/longitude, elements and minerals present, and associated rocks and their ages.
Author :
Publisher :
ISBN 13 :
Total Pages : 1288 pages
Book Rating : 4.:/5 (31 download)
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1990-07 with total page 1288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.F/5 ( download)
Download or read book Geological Fieldwork written by and published by . This book was released on 2004 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. J. McMillan
Publisher : Province of British Columbia, Mineral Resources Division
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.F/5 ( download)
Download or read book Ore Deposits, Tectonics, and Metallogeny in the Canadian Cordillera written by W. J. McMillan and published by Province of British Columbia, Mineral Resources Division. This book was released on 1991 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides a tectonic and mineral deposit overview, then discusses deposits in North American rocks, followed by deposits formed in accreted and suspect' terrains; deposits formed at or near the sea floor or from hot springs; and those formed in successively deeper zones as magmatic deposits, vein to replacement deposits, skarns, and porphyries. Deposits within and directly linked to intrusive rocks (magmatic, porphyries, skarns), replacement deposits, possible manto deposits, deep to shallow veins and related deposits formed at the surface, volcanogenic massive sulphides and sedex deposits are then discussed. Sedimentary-hosted deposits of gypsum, barite, phosphate and other industrial minerals are not covered, nor are coal, uranium, pegmatite-hosted deposits, molybdenum prophyries or some of the less common deposit types such as carbonatites, tin greisens, and placers.
Author : Geological Survey (U.S.)
Publisher :
ISBN 13 :
Total Pages : 746 pages
Book Rating : 4.3/5 (91 download)
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1991 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kula Misra
Publisher : Springer Science & Business Media
ISBN 13 : 9401139253
Total Pages : 857 pages
Book Rating : 4.4/5 (11 download)
Download or read book Understanding Mineral Deposits written by Kula Misra and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 857 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mineral deposits have supplied useful or valuable material for human consumption long before they became objects of scientific curiosity or commercial exploitation. In fact, the earliest human interest in rocks was probably because of the easily accessible, useful (e. g. , red pigment in the form of earthy hematite) or valuable (e. g. , native gold and gemstones) materials they contained at places. In modem times, the study of mineral deposits has evolved into an applied science employing detailed field observations, sophisticated laboratory techniques for additional information, and computer modeling to build complex hypotheses. Understanding concepts that would someday help geologists to find new mineral deposits or exploit the known ones more efficiently have always been, and will continue to be, at the core of any course on mineral deposits, but it is a fascinating subject in its own right, even for students who do not intend to be professional economic geologists. I believe that a course on mineral deposits should be designed as a "capstone course" that illustrates a comprehensive application of concepts from many other disciplines in geology (mineralogy, stratigraphy and sedimentation, structure and tectonics, petrology, geochemistry, paleontology, geomorphology, etc. ). This book is intended as a text for such an introductory course in economic geology, primarily for senior undergraduate and graduate students in colleges and universities. It should also serve as a useful information resource for professional economic geologists.
Author : David Richard Lentz
Publisher :
ISBN 13 :
Total Pages : 686 pages
Book Rating : 4.3/5 (91 download)
Download or read book Mineralized Intrusion-related Skarn Systems written by David Richard Lentz and published by . This book was released on 1998 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Geological Survey (U.S.)
Publisher :
ISBN 13 :
Total Pages : 428 pages
Book Rating : 4.3/5 (243 download)
Download or read book U.S. Geological Survey Bulletin written by Geological Survey (U.S.) and published by . This book was released on 1989 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen F. Personius
Publisher :
ISBN 13 :
Total Pages : 362 pages
Book Rating : 4.3/5 (243 download)
Download or read book Age and Origin of Fluvial Terraces in the Central Coast Range, Western Oregon written by Stephen F. Personius and published by . This book was released on 1993 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radiocarbon and thermoluminescence dating methods are used to determine the ages and probable origins of fluvial terraces.
