Precious Metal Deposits Associated with Alkaline Rocks, North American Cordillera North of 41 Degrees N.

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ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.:/5 (113 download)

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Book Synopsis Precious Metal Deposits Associated with Alkaline Rocks, North American Cordillera North of 41 Degrees N. by : Mark E. Griffin

Download or read book Precious Metal Deposits Associated with Alkaline Rocks, North American Cordillera North of 41 Degrees N. written by Mark E. Griffin and published by . This book was released on 1984 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Alkaline igneous rocks are the source, and host, a varlety of mineral deposits including: (1) epithermal Au and Ag deposits, (2) porphyry copper deposits with significant concentrations of Ag, Au, and Pt-metals, and (3) submarine exhalative base- and precious-metal deposits. These deposits occur throughout the North American Cordillera within isolated intrusives and related volcanics which have been emplaced in the crust through a variety of mechanisms. Experimental evidence suggests that these alkaline rocks are derived from an alkali basalt parent which has formed from partial melting of the upper mantle. ALKY is a petrochemical data base containing information on 3992 chemically analyzed alkaline and related rocks from the North American Cordillera. ALKY was created to evaluate classification schemes, genetic models, and geochemical prospectins techniques for alkaline rock-related mineral deposits. Based upon our data six rock assemblages can be recognized with respect to their associated mineral deposits and petrologic and chemical similarities. Of these, the felsic syenite assemblage holds the greatest potential for discovery of alkaline rock-related epithermal gold deposits. Statistical tests show a background value for gold in epithermal systems of 1 - 3 ppb, and Au:Ag ratios being 1:=10. Epithermal Ag deposits appear to be confined to the associated subalkaline rocks in these systems suggesting that the alkaline rock may have only been the heat engine which melted the crustal rocks. Chemical criteria for recognition of areas wlth a high exploration potential for the discovery of alkaline rock-related precious metal deposits include: (1) wt % SiO2 45, unless wt % CO2> 5; (2) high Au (> 10 ppb); (3) wt % Na2O + wt % K2O> 10; (4) K2O> Na20; (5)Fe2O3> FeO; (6) high Te, Ba/Rb; (7) locally high Tl, F, Nb and Ag"--Document.

Precious Metal Deposits Associated with Alkaline Rocks, North American Cordillera South of 41 Degrees N.

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ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (111 download)

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Book Synopsis Precious Metal Deposits Associated with Alkaline Rocks, North American Cordillera South of 41 Degrees N. by : D. Scott Stevens

Download or read book Precious Metal Deposits Associated with Alkaline Rocks, North American Cordillera South of 41 Degrees N. written by D. Scott Stevens and published by . This book was released on 1984 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Alkaline igneous rocks are the source, and host, of variety of mineral deposits in the North American Cordillera. These include: (1) epithermal Au deposits, (2) porphyry Cu deposits with significant concentrations of Ag, Pt, and Au metals, and (3) exhalative precious-metal deposits. I have used a computer data-base, ALKY, of published and unpublished major oxide and trace element analyses of alkaline rocks in the Cordillera. These data were used to evaluate and propose classification schemes, genetic models, and geochemical fingerprints for precious metal deposits associated with alkaline rocks. Alkaline rocks were emplaced in continental rift, extensional, and back arc spreading settings of the Cordillera. Gold deposits associated with alkaline rocks occur in exhalative, stock, caldera, high level intrusive, and vent environments. Mineralized hosts include: felsic syenites, altered mafic syenites, and carbonatitic rocks. Chemical attributes of alkaline rock-related gold deposits include: SiO2>45 wt% (unless CO2>5 wt%), Na2OK2O, high total alkalis (Na2O+K2O10 wt%), Fe2O3>FeO, MgO

Bibliography and Index of Geology

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ISBN 13 :
Total Pages : 1354 pages
Book Rating : 4.:/5 (45 download)

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Book Synopsis Bibliography and Index of Geology by :

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:

Rare Earth and Critical Elements in Ore Deposits

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ISBN 13 : 9781629490922
Total Pages : 365 pages
Book Rating : 4.4/5 (99 download)

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Book Synopsis Rare Earth and Critical Elements in Ore Deposits by : Philip L. Verplanck

Download or read book Rare Earth and Critical Elements in Ore Deposits written by Philip L. Verplanck and published by . This book was released on 2016 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Economic Geology

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ISBN 13 : 9781887483018
Total Pages : 0 pages
Book Rating : 4.4/5 (83 download)

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Book Synopsis Economic Geology by : Jeffrey W. Hedenquist

Download or read book Economic Geology written by Jeffrey W. Hedenquist and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Gold in 2000

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ISBN 13 :
Total Pages : 584 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Gold in 2000 by : Steffen Gerd Hagemann

Download or read book Gold in 2000 written by Steffen Gerd Hagemann and published by . This book was released on 2000 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Geology and Genesis of Major Copper Deposits and Districts of the World

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ISBN 13 : 9781934969458
Total Pages : 618 pages
Book Rating : 4.9/5 (694 download)

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Book Synopsis Geology and Genesis of Major Copper Deposits and Districts of the World by : Society of economic geologists

Download or read book Geology and Genesis of Major Copper Deposits and Districts of the World written by Society of economic geologists and published by . This book was released on 2012 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Geology and Metallogeny of the Stewart Mining Camp, Northwestern British Columbia

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Publisher : Province of British Columbia, Ministry of Energy, Mines and Petroleum Resources
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Geology and Metallogeny of the Stewart Mining Camp, Northwestern British Columbia by : Dani J. Alldrick

Download or read book Geology and Metallogeny of the Stewart Mining Camp, Northwestern British Columbia written by Dani J. Alldrick and published by Province of British Columbia, Ministry of Energy, Mines and Petroleum Resources. This book was released on 1993 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the geological setting of the mining camp and geologic features of the major mineral deposit types. New ideas about the tectonic setting and metallogenic history of the district are also presented. The area lies near the eastern margin of the Coast Mountains at the head of the Portland Canal, a fiord 115 kilometres long, which marks the southeastern boundary between the Alaska Panhandle and northwestern British Columbia.

The Geology of Chile

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Publisher : Geological Society of London
ISBN 13 : 9781862392205
Total Pages : 428 pages
Book Rating : 4.3/5 (922 download)

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Book Synopsis The Geology of Chile by : Teresa Moreno (Ph. D.)

Download or read book The Geology of Chile written by Teresa Moreno (Ph. D.) and published by Geological Society of London. This book was released on 2007 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first comprehensive account in English of the geology of Chile, providing a key reference work that brings together many years of research, and written mostly by Chilean authors from various universities and other centres of research excellence. The 13 chapters begin with a general overview, followed by detailed accounts of Andean tectonostratigraphy and magmatism, the amazingly active volcanism, the world class ore deposits that have proven to be so critical to the welfare of the country, and Chilean water resources. The subject then turns to geophysics with an examination of neotectonics and earthquakes, the hazardous frequency of which is a daily fact of life for the Chilean population. There are chapters on the offshore geology and oceanography of the SE Pacific Ocean, subjects that continue to attract much research not least from those seeking to understand world climatic variations, and on late Quaternary land environments, concluding with an account examining human colonization of southernmost America. The geological evolution of Chile is the c. 550 million year history of a continental margin over 4000 km long. During his voyage on H.M.S. Beagle, an extended visit to Chile (1834-35) had a profound impact on Charles Darwin, especially on his understanding of volcanoes, earthquakes and tsunamis.

Understanding Mineral Deposits

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Publisher : Springer Science & Business Media
ISBN 13 : 9401139253
Total Pages : 857 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Understanding Mineral Deposits by : Kula Misra

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.

Volcanic, Geothermal, and Ore-forming Fluids

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ISBN 13 :
Total Pages : 372 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Volcanic, Geothermal, and Ore-forming Fluids by : Stuart Frank Simmons

Download or read book Volcanic, Geothermal, and Ore-forming Fluids written by Stuart Frank Simmons and published by . This book was released on 2003 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Skarns in British Columbia

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ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Skarns in British Columbia by : Gerald E. Ray

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.

Southwest Pacific Rim Gold-copper Systems

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ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Southwest Pacific Rim Gold-copper Systems by : Greg John Corbett

Download or read book Southwest Pacific Rim Gold-copper Systems written by Greg John Corbett and published by . This book was released on 1998 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Potassic Igneous Rocks and Associated Gold-Copper Mineralization

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Publisher : Springer
ISBN 13 : 366200920X
Total Pages : 225 pages
Book Rating : 4.6/5 (62 download)

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Book Synopsis Potassic Igneous Rocks and Associated Gold-Copper Mineralization by : Daniel Müller

Download or read book Potassic Igneous Rocks and Associated Gold-Copper Mineralization written by Daniel Müller and published by Springer. This book was released on 2013-04-17 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there has been increasing interest from geoscientists in potassic ig neous rocks. Academic geoscientists have been interested in their petrogenesis and their potential value in defining the tectonic setting of the terranes into which they were intruded, and exploration geoscientists have become increasingly interested in the association of these rocks with major epithermal gold and porphyry gold-copper deposits. Despite this current interest, there is no comprehensive textbook that deals with these aspects of potassic igneous rocks. This book redresses this situation by elucidating the characteristic features of potassic (high-K) igneous rocks, erecting a hierarchical scheme that allows interpre tation of their tectonic setting using whole-rock geochemistry, and investigating their associations with a variety of gold and copper-gold deposits, worldwide. About two thirds of the book is based on a PhD thesis by Dr Daniel Muller which was produced at the Key Centre for Strategic Mineral Deposits within the Department of Geology and Geophysics at The University of Western Australia under the supervision of Professor David Groves, the late Dr Nick Rock, Professor Eugen Stumpf!, Dr Wayne Taylor, and Dr Brendon Griffin. The remainder of the book has been compiled from the literature using the collective experience of the two authors. The book is dedi cated to the memory of Dr Rock who initiated the research project but died before its completion.

Metal Deposits in Relation to Plate Tectonics

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Publisher : Springer Science & Business Media
ISBN 13 : 3662086816
Total Pages : 677 pages
Book Rating : 4.6/5 (62 download)

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Book Synopsis Metal Deposits in Relation to Plate Tectonics by : Frederick J. Sawkins

Download or read book Metal Deposits in Relation to Plate Tectonics written by Frederick J. Sawkins and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book metal deposits, in particular those of non-ferrous and precious metals, are classified and analyzed in terms of their plate tectonic settings. This approach allows a meaningful treatment of metal deposits of different types and provides significant insights into both their genesis and formative environments. The updated 2nd edition incorporates the most significant advances in economic geology of the last 5 years. Particular attention is paid to the geological settings and generative models of gold deposits of all kinds.

Structural Control of Mineral Deposits

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Publisher : MDPI
ISBN 13 : 3038977845
Total Pages : 256 pages
Book Rating : 4.0/5 (389 download)

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Book Synopsis Structural Control of Mineral Deposits by : Alain Chauvet

Download or read book Structural Control of Mineral Deposits written by Alain Chauvet and published by MDPI. This book was released on 2019-04-16 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Structural Control” remains a crucial point that frequently lacks in any scientific and/or economic analysis of ore deposits, whatever their type and class. The case of lode deposits is exemplary, although also other deposits, like breccia pipe, stockwerk, massive sulphides, skarn, etc., can, surprisingly, be concerned. Several concepts like the gold-bearing shear zone have not proven valid during the last few decades in terms of our understanding of gold deposit and have been totally abandoned. Additionally, the relationships between magmatism, regional tectonic context, and mineralization remain uncertain and have been debated in several recent publications. This demonstrates that this issue is still relevant, and its solution may help in the distinction between intrusion-related and orogenic deposits. In this Special Issue, we particularly invite any case study of mineral deposits, in which it has been demonstrated that structural geology may have a significant role in the establishment of the deposit model of formation and/or on exploration and exploitation programs. Examples in which the structural model diverges from those described in the classical literature are particularly welcomed, including studies in which relationships with magmatism can be suspected and/or demonstrated. Indeed, all cases that illustrate concepts that differ from the classic ones and from theoretical models may represent significant contributions to this volume.

Tectonic and Magmatic Evolution of the Snake River Plain Volcanic Province

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Publisher : Idaho Geological Survey
ISBN 13 :
Total Pages : 508 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Tectonic and Magmatic Evolution of the Snake River Plain Volcanic Province by : Bill Bonnichsen

Download or read book Tectonic and Magmatic Evolution of the Snake River Plain Volcanic Province written by Bill Bonnichsen and published by Idaho Geological Survey. This book was released on 2002 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: