Download or read book Turbidite hosted Gold Deposits written by J. Duncan Keppie and published by St. John's, Nfld., Canada : Geological Association of Canada. This book was released on 1986 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbidite hosted gold deposits written by Prudence Mary Leeming and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Comparative Study of the Turbidite hosted Gold Deposits in the Bendigo Ballarat and Melbourne Zones Central Victoria Australia written by Zhan Lin Gao and published by . This book was released on 1994 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbidite hosted Micro disseminated Gold Deposits written by Xuexiang Gu and published by . This book was released on 1996 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbidite hosted Gold Deposits Meguma Domain Eastern Nova Scotia written by P. K. Smith and published by . This book was released on 1985 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Controls on Genesis Distribution and Nature of the Turbidite hosted Gold Deposits Eastbelt Southwestern Slave Structural Province Yellowknife Northwest Territories written by Mark Wesley Richardson and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ptarmigan and Tom mesothermal gold deposits are located 10 km to the northeast of the city of Yellowknife, Northwest Territories. Both gold deposits comprise a series of en echelon veins. These veins are hosted within upper greenschist to lower amphibolite facies ~2630 Ma rocks. A low-temperature reduced hydrothermal environment during ore deposition formed as either a part of the main arsenopyrite-dominated mineralization or a distinct late-stage ore-formation event. At the deposit scale, the high-grade gold ores are preferentially developed with three contextual scenarios: (1) along contacts, especially the contact between black siltstone host rock and major barren, cleavage-parallel veins; (2) the contact between quartz laminae and carbonaceous host rock slivers; (3) proximity to bismuth telluride mineralization. Thus, competent, barren quartz veins along the axial plane of fold/thrust belts locally host superimposed gold mineralization and provide favourable targets for gold exploration. Hydrothermal apatite is a common accessory mineral in both mineralized and non-mineralized quartz veins in the metasedimentary host rocks that constitute the Ptarmigan and Tom deposits. The apatite in this study likely formed coeval with early stages of sulphide precipitation. The apatite age of 2585 ± 15 Ma is consistent with the intrusions of the 2605 and 2590 Ma two-mica granites of the Prosperous Suite. The near-concordant [superscript 204]Pb-corrected data of the LCT pegmatite hosted apatite reveals two clusters of ages. An older population with an intercept age (N = 4) of 2581 ± 15 Ma, and a younger population with an intercept age (N = 3) of 2519 ± 12 Ma . Furthermore, plotting a regression through all near – concordant data for the pegmatite hosted apatite hints that metamorpic resetting occured around ~2200 Ma. The distribution and abundance of major, minor, and trace elements from in-situ recovered apatite were studied to characterize the nature of mineralizing fluids. Most apatite from mineralized and non-mineralized veins show different Mn, Sr, and Pb contents, as well as chondrite-normalized rare-earth element (REE) and Y abundance patterns. REEs display five unique chondrite-normalized patterns: (1) negative sloped pattern with slight negative Eu anomaly, (2) a flat pattern with a positive Eu anomaly, (3) a positive slope with a negative Eu anomaly, (iv) light rare earth element (LREE) depleted pattern with positive Eu anomaly, and (v) bell-shaped pattern with a negative Eu anomaly. The REE patterns likely reflect both the source of the auriferous hydrothermal fluids and, perhaps, co-precipitating mineral phases. Apatite from the Ptarmigan vein occurs with both: (1) a flat pattern with a positive Eu anomaly and (2) bell-shaped pattern with a negative Eu anomaly. The bell-shaped and flat patterns typify orogenic gold deposits. Vein-hosted apatite commonly displays compositional zoning with a characteristic yellow cathodoluminescence (CL) emission spectra with darker cores and brighter rims. The cores have lower REE, whereas the rims are notably REE higher. It is thought that the darker cores in CL images reflect a transition from an early low REE hydrothermal fluid to one enriched in REE. Lastly, this study breaks ground for conducting a more robust study to classify the trace-element composition of apatite in gold deposits worldwide.

Download or read book The Metallogeny of Lode Gold Deposits written by Ulrich Kretschmar and published by Elsevier. This book was released on 2015-11-24 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book The Lithogeochemical and Mineralogical Setting of Turbidite Hosted Arsenic gold Deposits in the Lower Palaeozoic of Scotland written by Paul R. Duller and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbidite hosted gold deposits Meguma domain eastern Nova Scotia written by P. K. Smith and published by . This book was released on 1985 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbidite hosted Gold Mineralization at the Dolaucothi Gold Mines Dyfed Wales United Kingdom written by D. E. Annels and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quartz Vein Styles in Turbidite hosted Mesothermal Gold Deposits of Western South Island New Zealand Victoria Australia and Nova Scotia Canada written by and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes some results from a collaborative project that compared the Reefton and Lyell gold deposits of the Buller Terrane on New Zealand's South Island with similar deposits in Australia and Nova Scotia. The focus is on the styles of quartz veining in the three regions in order to provide a better understanding of the deposits and to highlight differences in known deposits that may prove useful in guiding future gold exploration. The discussion deals with vein types in mesothermal systems comparable in depositional depth with those emplaced in the Buller Terrane (5-10 kilometres). The following topics are discussed: general features of the gold deposits; internal structure of the veins; bedding-parallel veins; saddle and trough reefs; discordant veins; and quartz stockworks.

Download or read book Turbidite hosted Gold Deposits Meguma Domain Eastern Nova Scotia written by Geological Association of Canada and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology of the World s Major Gold Deposits and Provinces written by and published by . This book was released on 2020 with total page 845 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gold metallogeny and exploration written by R. P. Foster and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the last decade, the high and continuing demand for gold has prompted a global gold rush on a scale never before seen, not even in the heady days of Ballarat, California and the Yukon. Gold is being sought on every continent and, with very few exceptions, in every country around the world. Such interest and fierce competition has demanded considerable innovation and improvement in exploration techniques paralleled by a rapid expansion of the geological database and consequent genetic modelling for the many different types of gold deposits now recognized. This proliferation of data has swamped the literature and left explorationist and academic alike unable to sift more than a small proportion of the accumulating information. This new book represents an attempt to address this major problem by providing succinct syntheses ofall major aspects ofgold metallogeny and exploration, ranging from the chemical distribution of gold in the Earth's crust, and the hydrothermal chemistry of gold, to Archaean and Phanerozoic lode deposits, epithermal environments, chemical sediments, and placer deposits, and culminates in chapters devoted to geochemical and geophysical exploration, and the economics of gold deposits. Each chapter is written by geoscientists who are acknowledged internationally in their respective fields, thus guaranteeing a broad yet up-to-date coverage. In addition, each chapter is accompanied by reference lists which provide readers with access to the most pertinent and useful publications.

Download or read book Prehistoric Gold in Europe written by Giulio Morteani and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in the study of early European cultures is growing. These cultures have left us objects made of gold, other metals and ceramics. The advent of metal detectors, coupled with improved analytical techniques, has increased the number of findings of such objects enormously. Gold was used for economic and ceremonial purposes and thus the gold objects are an important key to our understanding of the social and political structures, as well as the technological achievements, of Bronze and Iron Age European societies. A correct interpretation of the information provided by gold and other metal objects requires the cooperation of experts in the fields of social, materials and natural science. Detailed investigation of gold deposits in Europe have revealed the composition and genesis of the deposits as sources of the metal. In Prehistoric Gold in Europe, a group of leading European geoscientists, metallurgists and archaeologists discuss the techniques of gold mining and metallurgy, the socioeconomic importance of gold as coinage and a symbol of wealth and status, and as an indicator of religious habits, as well as a mirror of trade and cultural relations mirrored by the distribution and types of gold objects in prehistoric times.

Download or read book Geological Classification of Canadian Gold Deposits written by Knud Howard Poulsen and published by . This book was released on 2000 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bulletin proposes a geological classification of lode gold deposits based largely on the nature of the ore and on the geological settings of the deposits. Sixteen common types of bedrock gold deposits are distinguished and their main geological attributes are summarized. These do not correspond to an equal number of genetic types; many of these deposit types represent different components of larger hydrothermal systems and are genetically related. Most of the deposit types identified are represented by at least one large example (containing over 100 tonnes of gold). Descriptions are provided of Canadian gold deposits, including Archean & Proterozoic deposits in the Canadian Shield, Late Proterozoic to Palaeozoic deposits in the Appalachian Orogen, and Mesozoic to Cenozoic deposits in the Cordilleran Orogen. The final section discusses the application of gold deposit models.

Download or read book Recent Advances in Understanding Gold Deposits written by T. Torvela and published by Geological Society of London Special Publications. This book was released on 2022-12-06 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gold occurs in many settings, but the dynamic nature of Earth’s crust means overlapping and overprinting deposit styles are common. Characterization of mineralization from an early stage becomes important, particularly where the mineralization is complex, in order to maximize exploration and project development success and mining productivity. Various techniques are used at different stages of a project to characterize gold deposits. This Special Publication offers a cross-section of some specific techniques used to investigate a variety of gold deposit types. The papers highlight both the breadth of the available techniques and their utility in deposit characterization, but also the many significant remaining questions and problems related to the exploration and research of gold deposits. Several papers include suggestions of avenues for fruitful further research, including a paper discussing a new approach to classifying orogenic gold deposits, and a paper describing archaeological applications of natural gold analyses.