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Riftrelated geothermal activity and epithermal gold veins

Riftrelated geothermal activity and epithermal gold veins Jeffrey W. Hedenquist University of Ottawa • NZ riftrelated geothermal activity and characteristics • Features of riftrelated epithermal Au veins • Controls on vein characteristics • Potential for epithermal Au veins in …

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Miocene and early Pliocene epithermal goldsilver deposits ...

Feb 07, 2019· Numerous important Miocene and early Pliocene epithermal AuAg deposits are present in the northern Great Basin. Most deposits are spatially and temporally related to two magmatic assemblages: bimodal basaltrhyolite and western andesite.

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Epithermal Au Ag [PDF Document]

DESCRIPTION. Epithermal AuAg deposits are distinguished as high and low sulphidation (HS LS) on the basis of ore and gangue mineralogy, derived from distinctly different fluid typess, and for the LS deposits there is a further distinction between the group of base metal rich deposits which commonly display a relationship with intrusion source rocks, and the banded adulariasericite style ...

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Low Sulphidation Epithermal Au | Corbett Menzies Cunliffe ...

Low Sulphidation Epithermal Au Controls to low sulphidation AuAg deposits Low Sulphidation Epithermal Ore shoots, with wider and higher Au grade, are formed by the coincidence of several of:

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Controls to low sulphidation epithermal AuAg mineralisation

Controls to low sulphidation epithermal AuAg mineralisation Greg Corbett ... Quality low sulphidation epithermal AuAg mineralisation is best developed in settings ... , 2005, Epithermal AuAg deposit types – implications for exploration: Proexplo Conference Peru May 2005, published on CD.

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Alteration in epithermal AuAg and geothermal systems in ...

Epithermal AuAg veins of the Hauraki Goldfield ( Moz Au, Moz Ag) and geothermal systems of the Taupo Volcanic Zone (TVZ) in the North Island, New Zealand, are hosted by rocks that are extensively altered over large distances. Alteration halos surrounding epithermal veins of the Hauraki gol

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H Epithermal RELATED INFORMATION

ASSOCIATED DEPOSIT TYPES: Hotspring AuAg , epithermal AuAg (H04, H05), placer Au (C01, C02). COMMENTS : There has been little work in recent years on this deposit type other than to examine their potential for related gold deposits, for example, McLaughlin mine in California (Gustafson, 1991).

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Epithermal Gold Deposits Characteristics

The word epithermal comes from the Greek words for “nearby heat” referring to the fact that epithermal deposits form very close to the surface of the crust, by definition, within a thousand meters. ... Epithermal Gold Deposits Characteristics. View Larger Image; Pamukkale’s Terraces. A ...

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Epithermal AuAg – The Magmatic Connection Comparisons ...

Epithermal AuAg deposits are distinguished as high and low sulphidation (HS LS) on the basis of ore and gangue mineralogy, derived from distinctly different fluid typess, and for the LS deposits there is a further distinction between the group of base metal rich deposits which

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EPITHERMAL AUAG BI TE MINERALIZATION IN THE SE …

argeoc3 third east african rift geothermal conference djibouti, 22 – 25 november 2010 93 93 epithermal auag bi te mineralization in the se afar rift,

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Fluid inclusion chemistry of adulariasericite epithermal ...

Microthermometry, laser ablationinductively coupled plasmamass spectrometry (LAICPMS), and Raman spectroscopy have been used to determine the temperature, apparent salinity, and composition of individual fluid inclusions in adulariasericite AuAg epithermal veins from the Karangahake, Martha, Favona, and Waitekauri deposits, southern Hauraki goldfield, New Zealand.

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Southern Silver mobilizes second drill to Cerro Las ...

Initially, 2000 metres of core drilling will test multiple AgAu quartz vein targets throughout the CLM West claim group which was acquired at modest cost through staking in 2017 as an addition to the main claims previously purchased by Southern Silver and which contain a mineral resource detailed below.

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Cordilleran Epithermal CuZnPb(AuAg) Mineralization in ...

tion epithermal Au(Ag) mineralization in the Marcapunta volcanic complex, which formed at ~ to Ma in the center of the district, on the southern margin of the Colquijirca and Smelter deposits. The purpose of this paper is to provide a detailed description of …

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Jurassic epithermal Au–Ag deposits of Patagonia, Argentina ...

Important precious metal deposits have been discovered during the last 10 years in the Deseado Massif region of Patagonia, Argentina. This region is a plateau consisting of Middle to Upper Jurassic volcanic rocks that host fracturecontrolled epithermal Au–Ag mineralization.

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Porphyryepithermal mineral system | Geoscience Australia

In addition to the major porphyry CuAu deposits, the Macquarie Arc also contains adulariasericite AuAg and pyrophyllitekaolinite AuCu epithermal deposits at Lake Cowal and Cargo, and at Peak Hill and Gidginbung, respectively (Cooke et al., 2007; Champion et al., 2009).

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Epithermal Gold for Explorationists | AIG Journal

Epithermal gold (± Cu Ag) deposits form at shallower crustal levels than porphyry CuAu systems, and are primarily distinguished as low and high sulphidation using criteria of varying gangue and ore mineralogy, deposited by the interaction of different ore fluids with host rocks and groundwaters.

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EPITHERMAL AUAG DEPOSIT TYPES ResearchGate

EPITHERMAL AUAG DEPOSIT TYPES IMPLICATIONS FOR EXPLORATION. ... Epithermal AuAg deposits form in the upper 1 km of the crust and are therefore best …

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