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Progressive Hydrothermal Alteration Associated With Gold Mineralization Of The Zone 1 Intrusion Of The Callahan Property Val Dor Quebec Microform
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Book Synopsis Progressive Hydrothermal Alteration Associated with Gold Mineralization of the Zone 1 Intrusion of the Callahan Property, Val D'Or, Quebec [microform] by : Cecilia Louise Jenkins
Download or read book Progressive Hydrothermal Alteration Associated with Gold Mineralization of the Zone 1 Intrusion of the Callahan Property, Val D'Or, Quebec [microform] written by Cecilia Louise Jenkins and published by National Library of Canada. This book was released on 1988 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadiana written by and published by . This book was released on 1990 with total page 1394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrothermal Alteration Associated with Volcanic-hosted Miocene Gold Mineralization of the Jumbo South Deposit, Hart District, Castle Mountains, San Bernardino County, California, U.S.A. by : Wendi Joan Whitehead Williams
Download or read book Hydrothermal Alteration Associated with Volcanic-hosted Miocene Gold Mineralization of the Jumbo South Deposit, Hart District, Castle Mountains, San Bernardino County, California, U.S.A. written by Wendi Joan Whitehead Williams and published by . This book was released on 1992 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrothermal Alteration and Exploration Vectors at the Island Gold Deposit, Michipicoten Greenstone Belt, Wawa, Ontario by : Tyler Justin Ciufo
Download or read book Hydrothermal Alteration and Exploration Vectors at the Island Gold Deposit, Michipicoten Greenstone Belt, Wawa, Ontario written by Tyler Justin Ciufo and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Island Gold deposit is a high-grade orogenic gold deposit located in the Goudreau Lake Deformation Zone (GLDZ), within the Michipicoten greenstone belt. This belt is situated within the larger Wawa-Abitibi terrane which is an area of significant gold endowment in the Superior Province. This underground mine is operated by Alamos Gold Inc. (formerly operated by Richmont Mines Inc.). At the end of 2016, the Island Gold Mine had estimated indicated and measured resources of 478,800 tonnes at 5.94 g/t Au (91,400 oz) as well as inferred resources estimated at 3,041,800 tonnes at 10.18 g/t Au (995,700 oz). Simultaneously, proven and probable mineral reserves were estimated at 2,551,000 tonnes at 9.17 g/t Au (752,200 oz). This thesis integrates petrology, geochemistry, electron probe microanalysis, U-Pb zircon geochronology, and multiple sulphur isotopic study to characterize the nature and timing of alteration associated with the auriferous zones at this deposit. The protoliths of pre-gold mineralization lithologies identified at the Island Gold deposit, listed from oldest to youngest, include dacitic volcanic rocks, iron formation, gabbro, and tonalite-trondhjemite. VGD extensional and V1-V2 shear-related quartz (± carbonate) veins, that often contain visible gold, post-date and alter these lithologies. Protoliths of post-mineralization gold lithologies include quartz diorite, gabbro/low-K lamprophyre (spessartite), and silica-poor diorite-monzodiorite. Late V3 extensional quartz-carbonate veins result in local, inconsistent alteration and remobilization of certain elements. Later tourmaline ribbons invade pre-existing structures. Lastly, diabase-quartz diabase dykes sharply cut all lithologies and vein types. Greenschist facies metamorphism has variably affected all lithologies, resulting in metamorphic minerals that mainly include actinolite, carbonates (mainly calcite), chlorite (ripidolite), chloritoid, epidote, hematite, plagioclase, quartz, and white mica. Archean U-Pb LA-ICP-MS ages of 2735 ± 8 Ma and 2738 ± 9 Ma obtained from zircons in altered and least-altered dacitic samples are consistent with previous geochronological studies. Analysis of uniform cathodoluminescent zircons and rims in the altered sample yielded anomalous Proterozoic ages ranging from c. 975 to 1499 Ma, which are attributed to unidentified alteration event(s) that post-date auriferous quartz veining. Alteration related to auriferous quartz veining at this deposit results in the significant and consistent enrichment of Au, K2O, Rb, S, and Te as well as typically the depletion of Na2O in alteration envelopes hosted by dacite, gabbro, and the tonalite-trondhjemite. Alteration minerals associated with V1-V2 auriferous quartz veining include biotite, Ca-Mg-Fe carbonates, chlorite (ripidolite), plagioclase, quartz, sulphides (pyrite ± pyrrhotite ± chalcopyrite), and white mica (muscovite ± phengite). The alteration associated with V1-V2 veining remains relatively consistent with varying distance parallel to the GLDZ and elevation. Aside from auriferous alteration resulting in Na2O depletion, alteration-derived biotite, and insignificant proportions of alteration-derived potassium feldspar at the Island Gold deposit, the gold-related alteration at orogenic gold deposits east of the Kapuskasing Structural Zone is similar to the alteration identified at the Island Gold deposit. This overall consistency of the alteration between these deposits and the Island Gold deposit supports a common genetic process for these orogenic gold deposits. Multiple sulphur isotope study of sulphide minerals from auriferous quartz veins and associated ore zones dominantly suggests a mantle/igneous parentage. The auriferous fluid that produced these veins was likely derived from the mantle, exsolved from a cooling crustal intrusive body, or the dehydration of igneous rocks due to metamorphism.
Book Synopsis Hydrothermal Alteration and Oil Show at the Summer Coon Intrusive Center, Saguache County, Colorado by : Trygve Loken
Download or read book Hydrothermal Alteration and Oil Show at the Summer Coon Intrusive Center, Saguache County, Colorado written by Trygve Loken and published by . This book was released on 1982 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Summer Coon intrusive center is located seven miles north of Del Norte, Colorado, on the eastern edge of the San Juan Mountains. The intrusive center is the core of a dissected calcalkaline composite volcano of middle Oligocene age. The Summer Coon rocks belong to the Conejos Formation which is the oldest unit in the eastern part of the San Juan volcanic field. The intrusive core is a composite stock of three fine- to mediumgrained rock types. The oldest stock, a texturally inhomogeneous diorite, is cut by numerous radial dikes and is intruded inthe center by a granodiorite porphyry and a rhyolitic vent breccia. The granodiorite porphyry and the vent breccia are part of a 2500-foot diameter central conduit, while the diorite occupies a two mile diameter stock of uncertain origin. Hydrothermal alteration at the Summer Coon intrusive core grades concentrically inward from a propylitic zone to an intermediate argillic zone. The intermediate argillic zone has scattered pods of quartz-sericite and vuggy silica replacement of the host. The zone of intermediate argillic alteration centers on the 2500- foot diameter central conduit and radial dikes of silicic composition. Alteration at the study area was caused by hot spring activity beneath the water table during the fumarolic stage of the volcano. The chemical process of alteration was hydrogen metasomatism, which caused variable hydrolytic decomposition of plagioclase feldspar and mafic minerals leading to the depletion of calcium, magnesium, manganese, nickel, and cobalt in the rocks. Metallization is related to the abundance of pyrite in veinlets and fractures. Centrally located molybdenum and lead anomalies, and weak peripheral zinc anomalies characterize surface geochemistry at the study area. A supergene oxidized cap zone 35 feet thick has created a superimposed effect upon hypogene alteration, and the more mobile elements have been leached from it. The favorable aspects of the Summer Coon intrusive area as a porphyry copper-molybdenum exploration target include the existence of a composite stock with concentric zonation of hydrothermal alteration assemblages, and centrally located molybdenum, lead, and IP anomalies, low resistivity, and low magnetic value zones. Unfavorable aspects include the lack of structures, the lack of peripheral lead, zinc, silver, and gold mineralization, and the great depth at which hypothetical zones of intense hydrothermal alteration and mineralization may be located. Tarry brownish-black petroleum was present in pyrite-coated fractures in cores from three diamond-drill holes. The petroleum was dated and is interpreted to have been locally generated from Cretaceous source rocks and to have migrated into the intrusive core after the cessation of hydrothermal activity.
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.
Book Synopsis Preliminary Determination of Epicenters by :
Download or read book Preliminary Determination of Epicenters written by and published by . This book was released on 2006 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gem & Crystal Treasures by : Peter Bancroft
Download or read book Gem & Crystal Treasures written by Peter Bancroft and published by . This book was released on 1984-01-01 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: 100 field trips to many of the world's exotic gem and crystal mines.
Author :Gerald E. Ray Publisher :Province of British Columbia, Ministry of Energy, Mines and Petroleum Resources ISBN 13 : Total Pages :116 pages Book Rating :4.F/5 ( download)
Book Synopsis The Geology and Mineralization of the Coquihalla Gold Belt and Hozameen Fault System, Southwestern British Columbia by : Gerald E. Ray
Download or read book The Geology and Mineralization of the Coquihalla Gold Belt and Hozameen Fault System, Southwestern British Columbia written by Gerald E. Ray and published by Province of British Columbia, Ministry of Energy, Mines and Petroleum Resources. This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Description of the geology, gold deposits and mineral occurrences adjacent to the Hozameen fault system and Coquihalla serpentine belt in southwestern B.C. The report gives a general geology of the area, the structural geology, and the economic geology by mine or gold occurrence. A short description of other mineral occurrences is also given.
Book Synopsis Earthquake Information Bulletin by :
Download or read book Earthquake Information Bulletin written by and published by . This book was released on 1980 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Interior of the Earth by : Eugene C. Robertson
Download or read book The Interior of the Earth written by Eugene C. Robertson and published by . This book was released on 1966 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis New Publications of the Geological Survey by : Geological Survey (U.S.)
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1989 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Digital Line Graphs from 1:24,000-scale Maps by : William R. Allder
Download or read book Digital Line Graphs from 1:24,000-scale Maps written by William R. Allder and published by . This book was released on 1984 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acid Precipitation written by and published by . This book was released on 1984 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :British Columbia. Geological Survey Branch Publisher :Province of British Columbia, Ministry of Energy, Mines and Petroleum Resources ISBN 13 : Total Pages :158 pages Book Rating :4.F/5 ( download)
Book Synopsis Carbonatites, Nepheline Syenites, Kimberlites and Related Rocks in British Columbia by : British Columbia. Geological Survey Branch
Download or read book Carbonatites, Nepheline Syenites, Kimberlites and Related Rocks in British Columbia written by British Columbia. Geological Survey Branch and published by Province of British Columbia, Ministry of Energy, Mines and Petroleum Resources. This book was released on 1994 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study documents alkaline rock occurrences in British Columbia; describes their petrography, geochemistry, economic geology, and field relationships; and determines the timing and tectonic controls of emplacement, providing a basis for future, detailed studies. Work was begun in 1984 and included field mapping during the summers of 1984, 1985, and 1986. All the carbonatite-syenite localities (with the exception of the Wicheeda Lake and Mount Bisson showings) and a large number of the diatreme breccias were mapped and sampled.
Download or read book Fresh from the Farm 6pk written by Rigby and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Exclusive Economic Zone by : Bonnie A. McGregor
Download or read book The Exclusive Economic Zone written by Bonnie A. McGregor and published by . This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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