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Author : David Richard Lentz
Publisher :
ISBN 13 :
Total Pages : 686 pages
Book Rating : 4.44/5 ( 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 : Jeffrey W. Hedenquist
Publisher :
ISBN 13 : 9781887483018
Total Pages : 0 pages
Book Rating : 4.12/5 ( download)
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:
Author : Gerald E. Ray
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.37/5 ( 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 : Ronald Massawe
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.19/5 ( download)
Download or read book Petrogenesis of Cu-Ag Skarn Mineralization in the Mackenzie Gulch Area, Northern New Brunswick, Canada written by Ronald Massawe and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Northern New Brunswick and the adjacent Gaspé Peninsula of Québec host numerous contact metasomatic Cu–Au skarn deposits commonly in proximity to small Siluro–Devonian intermediate to felsic stocks and/or dikes. In this region, specifically northern New Brunswick, skarn occurrences are principally hosted within the late Ordovician to early Silurian Matapédia Group, which consists of thin-bedded, dark grey argillaceous limestone and calcareous siltstone. This thesis investigated Cu–Ag skarn occurrences at the McKenzie Gulch (MG) area in northern New Brunswick by integrating field observations, petrographic, petrochemical, electron-probe microanalysis (EPMA), laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS), fluid inclusions, geochronology (U–Pb zircon and titanite), stable S isotopes, and radiogenic Pb isotopes with the main objective being to understand the petrogenesis of skarn occurrences and establish their relationship to the intrusive rocks. This investigation involved the evaluation of porphyry dikes that are spatially and temporally related to these skarn systems by examining potential parameters that are known to be associated with the genesis of intrusion-related deposits. These magmatic aspects include oxidation state of the magma, water content, P–T conditions, in addition to magma source characteristics, formation, petrochemistry, evolution and emplacement conditions. As a result, two suites of porphyry dikes were recognized in the MG area during this evaluation: (1) plagioclase–hornblende (P–H), and (2) quartz–plagioclase (Q–P) porphyry suites. These Middle Devonian (386.0 ± 2.3 Ma) intrusive rocks are mildly oxidized, I-type granitoids with calc-alkaline affinity that range in composition from granodioritic to tonalitic (with few granitic), based on their petrochemical features. These dikes also exhibit adakite characteristics, a geochemical feature that has been widely associated with many porphyry Cu (and skarn) systems. Petrochemical features and cathodoluminescence (CL) characteristics of quartz crystals from these suites of dikes suggest that two magma chambers were responsible for evolution of these intrusive rocks. The three types of quartz crystals with contrasting CL features have been attributed to at least three different environments of crystallization: 1) a higher temperature environment (up to 915 oC) as recorded by cores of phenocrysts with high Ti concentrations (up to 200 ppm); 2) a moderate to high temperature (≥ 700 ≤ 750 oC) environment as recorded by the transition zones within quartz phenocrysts and microphenocrysts; and 3) a low temperature environment in which groundmass quartz quench crystallized during hypabyssal dike emplacement. Studies of the mineral chemistry showed that composition of calc-silicates (i.e., garnets and pyroxene) have intimate relationship with the dominant metal of the mineralized skarns. These calc-silicate phases plot in their respective compositional fields of Cu-dominated skarns. The investigation conducted on fluid inclusion, geochronology, stable isotope, and mineralization supports field observations, which indicates that skarn formations at the MG area have an association with the intruding porphyry dikes and that this skarn is very similar to and shows no difference with the characteristics of other world-class, intrusion-related skarn systems. Geochronological studies based on U–Pb zircon and hydrothermal titanite indicates a coeval relationship between mineralization and dikes emplacement, suggesting that mineralization in the MG area is short lived or it occurred near the end of magmatic-hydrothermal activity.
Author : Alcides Nóbrega Sial
Publisher : Geological Society of London
ISBN 13 : 9781862393219
Total Pages : 202 pages
Book Rating : 4.14/5 ( download)
Download or read book Granite-related Ore Deposits written by Alcides Nóbrega Sial and published by Geological Society of London. This book was released on 2011 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together a collection of papers that summarize current ideas and recent progress in the study of granite-related mineralization systems. They provide a combination of field, experimental and theoretical studies. Papers are grouped according to the main granite-related ore systems: granite-pegmatite, skarn and greisen-veins, porphyry, orogenic gold, intrusion-related, epithermal and porphyry-related gold and base metal, iron oxide-copper-gold (IOCG), and special case studies. The studies provide a broad spread in terms of both space and time, highlighting granite-related ore deposits from Europe (Russia, Sweden, Croatia and Turkey), the Middle East (Iran), Asia (Japan and China) and South America (Brazil and Argentina) and spanning rocks from Palaeoproterozoic to Miocene in age.
Author : Mohammed Bouabdellah
Publisher : Springer
ISBN 13 : 3319317334
Total Pages : 585 pages
Book Rating : 4.35/5 ( download)
Download or read book Mineral Deposits of North Africa written by Mohammed Bouabdellah and published by Springer. This book was released on 2016-06-21 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents an exhaustive overview of major orebodies and mineral deposits of North Africa. It is intended both for academic researchers and especially for exploration geologists interested in mineral exploration in the northern part of the African continent. Recent changes in the mining laws of most countries in this region have encouraged international mining companies to invest in local mineral industries. Accordingly, this volume will be very useful for these professionals, as well as for researchers in the field of economic geology.
Author : Alain Chauvet
Publisher : MDPI
ISBN 13 : 3038977845
Total Pages : 256 pages
Book Rating : 4.41/5 ( download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.68/5 ( download)
Download or read book Progress on Geoenvironmental Models for Selected Mineral Deposits Types written by and published by . This book was released on 2002 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Swapan Kumar Haldar
Publisher : Elsevier
ISBN 13 : 0323851363
Total Pages : 437 pages
Book Rating : 4.67/5 ( download)
Download or read book Introduction to Mineralogy and Petrology written by Swapan Kumar Haldar and published by Elsevier. This book was released on 2020-07-29 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Mineralogy and Petrology, second edition, presents the essentials of both disciplines through an approach accessible to industry professionals, academic researchers, and students alike. This new edition emphasizes the relationship between rocks and minerals, right from the structures created during rock formation through the economics of mineral deposits. While petrology is classified on the lines of geological evolution and rock formation, mineralogy speaks to the physical and chemical properties, uses, and global occurrences for each mineral, emphasizing the need for the growth of human development. The primary goal is for the reader to identify minerals in all respects, including host-rocks, and mineral deposits, with additional knowledge of mineral-exploration, resource, extraction, process, and ultimate use. To help provide a comprehensive analysis across ethical and socio-economic dimensions, a separate chapter describes the hazards associated with minerals, rocks, and mineral industries, and the consequences to humanity along with remedies and case studies. New to the second edition: includes coverage of minerals and petrology in extra-terrestrial environments as well as case studies on the hazards of the mining industry. Addresses the full scope of core concepts of mineralogy and petrology, including crystal structure, formation and grouping of minerals and soils, definition, origin, structure and classification of igneous, sedimentary and metamorphic rocks Features more than 250 figures, illustrations and color photographs to vividly explore the fundamental principles of mineralogy and petrology Offers a holistic approach to both subjects, beginning with the formation of geologic structures that is followed by the hosting of mineral deposits and the exploration and extraction of lucrative, usable products that improve the health of global economies Includes new content on minerals and petrology in extraterrestrial environments and case studies on hazards in the mining industry
Author : Wayne David Goodfellow
Publisher :
ISBN 13 :
Total Pages : 1080 pages
Book Rating : 4.78/5 ( download)
Download or read book Mineral Deposits of Canada written by Wayne David Goodfellow and published by . This book was released on 2007 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
