Download or read book The Hydrothermal Chemistry of Gold Arsenic Antimony Mercury and Silver written by John A. Apps and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive thermodynamic database based on the Helgeson-Kirkham-Flowers (HKF) equation of state was developed for metal complexes in hydrothermal systems. Because this equation of state has been shown to accurately predict standard partial molal thermodynamic properties of aqueous species at elevated temperatures and pressures, this study provides the necessary foundation for future exploration into transport and depositional processes in polymetallic ore deposits. The HKF equation of state parameters for gold, arsenic, antimony, mercury, and silver sulfide and hydroxide complexes were derived from experimental equilibrium constants using nonlinear regression calculations. In order to ensure that the resulting parameters were internally consistent, those experiments utilizing incompatible thermodynamic data were re-speciated prior to regression. Because new experimental studies were used to revise the HKF parameters for H2S0 and HS-1, those metal complexes for which HKF parameters had been previously derived were also updated. It was found that predicted thermodynamic properties of metal complexes are consistent with linear correlations between standard partial molal thermodynamic properties. This result allowed assessment of several complexes for which experimental data necessary to perform regression calculations was limited. Oxygen fugacity-temperature diagrams were calculated to illustrate how thermodynamic data improves our understanding of depositional processes. Predicted thermodynamic properties were used to investigate metal transport in Carlin-type gold deposits. Assuming a linear relationship between temperature and pressure, metals are predicted to predominantly be transported as sulfide complexes at a total aqueous sulfur concentration of 0.05 m. Also, the presence of arsenic and antimony mineral phases in the deposits are shown to restrict mineralization within a limited range of chemical conditions. Finally, at a lesser aqueous sulfur concentration of 0.01 m, host rock sulfidation can explain the origin of arsenic and antimony minerals within the paragenetic sequence.
Download or read book Mineralogy of Noble Metals and Invisible Speciations of These Elements in Natural Systems written by Galina Palyanova and published by MDPI. This book was released on 2020-05-13 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue covers a broad range of topics related to the mineralogy of noble metals (Au, Ag, Pt, Pd, Rh, and Ru) and the occurrence, formation, and distribution of these elements in natural ore-forming systems. This collection of eleven research articles discusses various problems related to these topics. I hope this Special Issue will contribute to a better understanding of the genesis of gold, silver, and other noble metal deposits as well as the behavior of these elements in endogenic and supergene environments, and suggest ways forward to solving the problem of their full extraction from ores.
Download or read book Water Formed Deposits written by Zahid Amjad and published by Elsevier. This book was released on 2022-03-24 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water-Formed Deposits: Fundamentals and Mitigation Strategies wholly presents the important issue of deposits in aqueous systems, both industrial and biological. By analyzing causes, mechanisms and mitigation strategies, the book helps researchers/engineers/end-users gain a fundamental understanding of the issues underlying deposit formation and mitigation. It covers numerous, fundamental aspects of water-formed deposits, while also giving an applications’ perspective. The book's goal is to assist the reader in his/her understanding of the important issues of scale formation, while also helping with potential solutions. Provides a fundamental understanding of deposit formation by presenting basic science and mechanisms Presents an “applications perspective Reveals a systematic overview of deposit-related challenges and their mitigation Correlates structure to performance in mitigation strategies Analyzes current legal aspects and regulations Includes case studies from the “real industrial world for the industrial reader/end user
Download or read book Geochemistry of Hydrothermal Ore Deposits written by Hubert Lloyd Barnes and published by John Wiley & Sons. This book was released on 1997-06-23 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thoroughly revised and expanded new edition incorporates the most recent research findings on the subject, such as the discovery of dramatic undersea hydrothermal vents. It describes the key process in the generation of ore deposits and emphasizes solid theoretical understanding.
Download or read book U S Geological Survey Circular written by and published by . This book was released on 1984 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 1986 Annual Report on Alaska s Mineral Resources written by and published by . This book was released on 1986 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Archaeologist s Guide to Chert and Flint written by Barbara E. Luedtke and published by Cotsen Institute of Archaeology Press. This book was released on 1994-12-31 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prospects for Mineral Resource Assessments on Public Lands written by Simon M. Cargill and published by . This book was released on 1986 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulfide Mineralogy and Geochemistry written by David J. Vaughan and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 61 of Reviews in Mineralogy and Geochemistry presents an up-to-date review of sulfide mineralogy and geochemistry. The crystal structures, electrical and magnetic properties, spectroscopic studies, chemical bonding, thermochemistry, phase relations, solution chemistry, surface structure and chemistry, hydrothermal precipitation processes, sulfur isotope geochemistry and geobiology of metal sulfides are reviewed. Where it is appropriate for comparison, there is brief discussion of the selenide or telluride analogs of the metal sulfides. When discussing crystal structures and structural relationships, the sulfosalt minerals as well as the sulfides are considered in some detail.
Download or read book Review written by Oak Ridge National Laboratory and published by . This book was released on 1983 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions to Commodity Geology Research written by John H. DeYoung and published by . This book was released on 1992 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prospects for Mineral Resource Assessments on Public Lands written by David H. Root and published by . This book was released on 1984 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Ingeominas Mineral Resource Assessment of Colombia written by and published by . This book was released on 1984 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Barite Nodules in Devonian Shale and Mudstone of Western Virginia written by Sandra H. B. Clark and published by . This book was released on 1989 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Gold written by John C. Scoffern and published by . This book was released on 1852 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1972 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
