Epithermal gold deposits pdf995

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Recognising sinters in epithermal gold deposits Surficial deposits of siliceous sinter are a com• mon feature of present-day hot springs in areas of active volcanism, but they are rarely recognised in older, eroded volcanic ter• ranes because of their low preservation poten• tial, and their limited vertical and lateral
deposits. • The State, in addition to controlling the Central Bank (the state monetary authority), controls the Banco de la Republica Oriental del Uruguay (BROU, a state-owned commercial bank), the Banco Hipotecario (a state-owned bank specializing in mortgages) and is the only shareholder of the Nuevo Banco Comercial
Skarn deposits are also zoned in this mineral system, with Cu-rich skarns generally very close to the causative intrusion, but Zn-Pb-rich skarns more distal. An important feature of the porphyry-epithermal mineral system is the telescoping of different deposit types, for instance porphyry Cu-Au-Mo deposits and epithermal deposits of various types.
Epithermal Gold Deposits-Part I H1 . except the Florence mine were consolidated as the Goldfield Consolidated Mines Company in late 1906. Local mills were opened and expanded from 1905 to 1909, rail connections were completed in 1905 and 1907, and a 48-km water-supply pipeline was completed from
The association of gold mineralization with volcanic and geothermal hot spring activity has long been recognized by prospectors and geologists. We now know that this association is a consequence of the hot magmas which not only produce volcanic eruptions and volcanic rocks but also are the source of
new gold deposits. The objectives of this paper are to provide an update on gold deposit models, and what new approaches and techniques can now be used to find gold deposits. Gold occurs in a wide range of deposit types and settings, but this paper is concerned with deposits in which gold forms the main economic commodity or a co-product.
ama.org.uk Mineral deposit – Mineral deposit – Hydrothermal solution: Hydrothermal mineral deposits are those in which hot water serves as a concentrating, transporting, and depositing agent. They are the most numerous of all classes of deposit. Hydrothermal deposits are never formed from pure water, because pure water is a poor solvent of most ore minerals.
Mesothermal Vein Gold Deposits Investing News Network – June 2nd, 2016 Mesothermal veins are known for their large size and continuation to depth, and therefore, are a major source of the world
Corbett: Epithermal Gold For Explorationists Paper 2002-01, April 2002 5 mineralogical differences used to categorise the styles of low sulphidation epithermal gold deposit styles (Corbett and Leach, 1998) . The third order in the classification of low sulphidation epithermal gold deposits (Figures 1 & 2) is
Corbett, G.J., 2002a, Epithermal Gold for Explorationists -Australian Institute of Geoscientists Presidents lecture: AIG News No 67, 8p. Corbett, G.J., 2002b, Structural controls to Porphyry Cu-Au and Epithermal Au-Ag deposits in Applied Structural Geology for Mineral Exploration, Australian Institute of Geoscientists Bulletin 36, p. 32-35.
exploration for epithermal gold deposits, this understand-ing can be augmented by familiarity with active hydrother-mal systems, their present-day analogues. Although finding an attractive prospect in the first place is hard work, a majority of exploration budgets these days is spent on assessment. Therefore, we focus on the explo-
exploration for epithermal gold deposits, this understand-ing can be augmented by familiarity with active hydrother-mal systems, their present-day analogues. Although finding an attractive prospect in the first place is hard work, a majority of exploration budgets these days is spent on assessment. Therefore, we focus on the explo-
sulphidation epithermal Au-Ag deposits display two fluid flow trends and zoned deposit types, within either arcs or strongly extensional settings. The arc deposits tend to be sulphide-rich with a progression in styles, in time and from deep to shallower crustal levels, as quartz-sulphide Au ± Cu, to carbonate-base metal Au, and then epithermal
The Discovery and Geology of the Salares Norte Epithermal Gold-Silver Deposit, Northern Chile, AME ROUNDUP January 2017 Funnel shaped ore body Initial inferred resource: 3.3 Moz Au @ 3.9 g/t Au and 42.1 Moz Ag @ 48.9 g/t Ag ** **Gold Fields Mineral Resources and Mineral Reserve Supplement to the Integrated Annual Review, 31 December 2015

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