Download or read book Geochemistry of Gold in the Weathering Cycle written by Hubert William Lakin and published by . This book was released on 1974 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the solubilization of gold by the formation of chloride, bromide, iodide, thiosulfate, thiocyanide, and cyanide gold complexes and related topics.

Download or read book Geochemistry of Gold in the Weathering Cycle a Study of the Solubilization of Gold by the Formation of Chloride Bromide Iodide Thiosulfate Thiocyanide and Cyanide Gold Complexes and Related Topics written by Geological Survey (U.S.) and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry of Gold in the Weathering Cycle written by Donal Ray Mullineaux and published by . This book was released on 1974 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Bulletin written by and published by . This book was released on 1974 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 2834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrography and Stratigraphy of Glacial Drift Mesabi Vermilion Iron Range Area Northeastern Minnesota written by George R. Schiner and published by . This book was released on 1973 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Description of two new stratigraphic units previously considered to be the lower part of the Wasatch Formation in southern Utah.

Download or read book Estimation of Petroleum Exploration Success and the Effects of Resource Base Exhaustion Via a Simulation Model written by Lawrence J. Drew and published by . This book was released on 1974 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Catalogs written by Library of Congress and published by . This book was released on 1976 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Subject Catalog written by Library of Congress and published by . This book was released on 1976 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pure and Applied Science Books 1876 1982 written by and published by . This book was released on 1982 with total page 1374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over 220,000 entries representing some 56,000 Library of Congress subject headings. Covers all disciplines of science and technology, e.g., engineering, agriculture, and domestic arts. Also contains at least 5000 titles published before 1876. Has many applications in libraries, information centers, and other organizations concerned with scientific and technological literature. Subject index contains main listing of entries. Each entry gives cataloging as prepared by the Library of Congress. Author/title indexes.

Download or read book National Union Catalog written by and published by . This book was released on 1978 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.

Download or read book American Book Publishing Record Cumulative 1950 1977 written by R.R. Bowker Company. Department of Bibliography and published by . This book was released on 1978 with total page 2006 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to Geology and Resources of Gold and Geochemistry of Gold written by Daniel R. Shawe and published by . This book was released on 1988 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry Mineralogy and Genesis of Gold Deposits written by I.Y. Nekrasov and published by Routledge. This book was released on 2018-05-02 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behaviour of gold in sedimentary, magmatic and postmagmatic processes are studied and 40 gold-bearing minerals including ten which were recently discovered are described. The results are presented of new experimental studies on phase relations in gold-sulphide systems. The solubility & form of gold migration in high-temperature chloride, sulphide and arsenic solutions are determined. Based on the new data, the genesis of gold deposits is studied and a geochemical classification proposed. This book is designed for specialists in the field of gold chemistry, geochemistry and mineralogy and for field geologists surveying and prospecting for gold.

Download or read book Geochemistry of Gold in the Weathering Cycle written by Geological Survey (U.S.) and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry Mineralogy and Genesis of Gold Deposits written by I.Y. Nekrasov and published by CRC Press. This book was released on 1996-01-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behaviour of gold in sedimentary, magmatic and postmagmatic processes are studied and 40 gold-bearing minerals including ten which were recently discovered are described. The results are presented of new experimental studies on phase relations in gold-sulphide systems. The solubility & form of gold migration in high-temperature chloride, sulphide and arsenic solutions are determined. Based on the new data, the genesis of gold deposits is studied and a geochemical classification proposed. This book is designed for specialists in the field of gold chemistry, geochemistry and mineralogy and for field geologists surveying and prospecting for gold.

Download or read book The Biogeochemical Cycling of Gold Under Surface and Near surface Environmental Conditions written by Jeremiah P. Shuster and published by . This book was released on 2013 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mobility of gold at near-surface environmental conditions, e.g., supergene weathering environments, lateritic weathering systems, saline to hypersaline systems and placer gold environments, takes place as oxidised, soluble gold complexes and as reduced elemental gold. The transformation between aqueous and solid states of gold is attributed to the varying geochemical conditions that occur in dynamic environments that are catalysed in part by the biosphere. The primary focus of this research is the investigation of biogeochemical processes that contribute to the cycling of gold using laboratory models to represent various natural systems including chemolithotrophic bacteria, e.g., iron-oxidising bacteria, and heterotrophic sulphate-reducing bacteria and nitrifying bacteria. Results from these studies demonstrate that bacteria initiate the gold cycle by liberating gold through the chemical weathering of gold-bearing minerals. Through oxidative-complexation, soluble gold complexes, e.g., gold (I) thiosulphate and gold (III) chloride, could be produced; however, destabilisation of these gold complexes coupled with bioprecipitation and biomineralisation can immobilise gold thereby completing the cycle. Since the biosphere has an influence on the geochemical conditions of natural environments, the duration of the mobility of gold as soluble complexes is finite and represents a brief snap shot of gold's occurrence. Therefore under surface and near-surface environmental conditions gold will predominantly occur as secondary gold. Secondary gold occurs as nanometre-size to micrometre-size colloids, octahedral platelets, euhedral crystals and bacteriomorphic structures. Furthermore, when bacteria develop as a structurally cohesive biofilms, reduction and enrichment of gold can occur and produce macroscopic gold structures including foils, grains and nuggets. Therefore, bacteria can have a profound effect on the occurrence of gold in natural environments as long as nutrients necessary for microbial metabolism are sustained and gold is in the system. The direct and indirect biogenic effects on gold biogeochemistry will persist over geological time forming observed anomalous gold concentrations such as nugget formations and supergene gold enrichment. Characterising the morphology of gold grains and nuggets in association with understanding how biogeochemical conditions contribute to gold immobilisation is important for gold exploration as it has practical application in mineral vectoring.