An Integrated Model For The Origin Of Archean Lode Gold Deposits
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An Integrated Model For The Origin Of Archean Lode Gold Deposits
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Author : A. C. Colvine
language : en
Publisher:
Release Date : 1984
An Integrated Model For The Origin Of Archean Lode Gold Deposits written by A. C. Colvine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Geology, Economic categories.
An Integrated Model For The Origin Of Archean Lode Qgs Gold Deposits
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Author : A. C. Colvine
language : en
Publisher:
Release Date : 1984
An Integrated Model For The Origin Of Archean Lode Qgs Gold Deposits written by A. C. Colvine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Understanding Mineral Deposits
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Author : Kula Misra
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Understanding Mineral Deposits written by Kula Misra and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
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.
Archaean Lode Gold Deposits Of Canada Part 2 Characteristics Of The Hydrothermal Systems And Models Of Origin
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Author :
language : en
Publisher:
Release Date : 1986
Archaean Lode Gold Deposits Of Canada Part 2 Characteristics Of The Hydrothermal Systems And Models Of Origin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
U S Geological Survey Bulletin
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Author :
language : en
Publisher:
Release Date : 1983
U S Geological Survey Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Geology categories.
A Regional Structural Model For Gold Mineralization In The Southern Part Of The Archean Superior Province United States
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Author : Paul Kibler Sims
language : en
Publisher:
Release Date : 1992
A Regional Structural Model For Gold Mineralization In The Southern Part Of The Archean Superior Province United States written by Paul Kibler Sims and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Geology, Stratigraphic categories.
The Canadian segment of the Archean Superior province is a major world source of lode gold. The gold deposits occur in or near regional transcurrent and oblique slip-shear deformation zones that comprise a conjugate set to a northwest- directed compression of the Superior province. These structures provided permeable pathways for the flow of large volumes of auriferous fluid derived from an external source. Historic gold production from the United States segment of the Superior province is modest, but the close similarity in the geologic environment of the United States and Canadian segments suggests that large gold deposits should be present in the U.S.A. An occurrence model largely based on known parameters of gold mineralization in Canada suggests that the greenstone-granite terranes of the Wawa and Wabigoon sub-provinces in the United States are favorable for important gold deposits. The model suggests that gold mineralization took place during or later than the transcurrent faulting and that it took place contemporaneously with emplacement of silica-undersaturated intrusions. The faulting occurred late in the igneous-tectonic history of the Superior province, about 2,690 Ma. Extensive, intense alteration comprising carbonitization, silicification, and sulfidization accompanied the gold mineralization. The relationships between alteration minerals and mineralized veins suggest a close temporal relationship between the alteration and gold mineralization processes. The proposed occurrence model for gold mineralization and the available data suggest that two broad regions of greenstone in the Archean Superior province in north-central United States are particularly favorable for gold deposits: (1) the Upper Peninsula of Michigan, and (2) northeastern Minnesota. The Ishpeming greenstone belt of the Wawa subprovince in Michigan contains the important Ropes deposit and several other known gold occurrences, and the Vermilion district (Wawa subprovince) in northeastern Minnesota contains highly anomalous gold in soils and minor known bedrock occurrences. Transcurrent faults in both areas should be favorable sites for gold mineralization
Archaean Lode Gold Deposits Of Canada
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Author : R. Kerrich
language : en
Publisher:
Release Date : 1986
Archaean Lode Gold Deposits Of Canada written by R. Kerrich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
The Metallogeny Of Lode Gold Deposits
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Author : Ulrich Kretschmar
language : en
Publisher: Elsevier
Release Date : 2015-11-24
The Metallogeny Of Lode Gold Deposits written by Ulrich Kretschmar and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-24 with Science categories.
The Metallogeny of Lode Gold Deposits: A Syngenetic Perspective is a synthesis of lode gold vein forming processes, addressing the commonality in similar worldwide deposits. The book’s empirical model incorporates widely known and accepted principles of ore deposition and shows how it applies in the volcanic-sedimentary greenstone belt environment. Several chapters detail outcrop maps and photos of field occurrences and textures. The interpretations flow directly from the authors’ field work, and are coupled with analyses of underlying physical processes. Utilizing detailed geological mapping, field work, and chemical analyses as the basis of a syngenetic formation mode, the text arms readers with the tools necessary to accurately analyze and interpret new data on the subject. This includes information on decoding the significance of asymmetry in vein formation, as well as the role of lamprophyres in gold camps, how Archean geology requires integration into a lode vein formation model, and how to develop an understanding of the worldwide applicability of gold cycles to lode vein formation and exploration and how it can be applied to deposits of all ages. Presents the first book to galvanize lode gold research into a single authoritative reference Simplifies the complexity of lode gold’s underlying processes and presents valid concepts surrounding the lode gold forming environment Features color figures, illustrations, and photos that enrich the content’s focus and aid in the retention of key concepts
Archean Lode Gold Deposits In Ontario
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Author : A. C. Colvine
language : en
Publisher:
Release Date : 1988
Archean Lode Gold Deposits In Ontario written by A. C. Colvine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Science categories.
U S Geological Survey Bulletin
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Author : Paul Kibler Sims
language : en
Publisher:
Release Date : 1983
U S Geological Survey Bulletin written by Paul Kibler Sims and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Faults (Geology) categories.
The Early Proterozoic Michigamme Formation of northern Michigan was deposited in the southeastern part of the Animikie basin. The formation conformably overlies the Goodrich Quartzite and comprises three widespread members a lower member of thin-bedded shale, siltstone, and sandstone; the Bijiki Iron-formation Member; and an upper member of tur- biditic graywacke, siltstone, and mudstone and a few local members. The Goodrich Quartzite is interpreted as having been deposited in a tidally influenced shallow marine environ- ment. The lower member of the Michigamme is interpreted as having been deposited in a tidally influenced environment, the iron-formation member as having been deposited below wave base in somewhat deeper water, and the upper member as having been deposited in still deeper water with turbidity currents being a major depositional mechanism. Several lines of evidence including paleocurrents, paleo- geographic setting, and neodymium isotopes suggest that the graywacke of the southern part of the outcrop area was derived from the south (Early Proterozoic Wisconsin magmatic terranes, Archean miniplates, and older Early Proterozoic sedimentary units formed on the continental margin), and that the graywacke in the northern area was derived from an Archean terrane to the north. The tectonic model that best fits the available data is a northward-migrating foreland basin.