The Hishikari Au-Ag Epithermal Deposit, Japan: Oxygen and Hydrogen Isotope Evidence in Determining the Source of Paleohydrothermal Fluids

Faure, Kevin; Matsuhisa, Yukihiro; Metsugi, Hideya; Mizota, Chitoshi; Hayashi, Saori

doi:10.2113/gsecongeo.97.3.481

Cited by 69 publications

(46 citation statements)

References 38 publications

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“…Carbonate precipitation may have been enhanced after periods of increased surface evaporation or, alternatively due to magmatic fluid flashing. Although low sulfidation epithermal systems are most commonly dominated by meteoric fluids (Simmons et al, 2005), significant magmatic contributions have also been reported (e.g., Faure et al, 2002). An important difference between El Peñón and other low sulfidation deposits such as Golden Cross (New Zealand) or Hishikari (Japan) is the climate at the time of mineralization.…”

Section: Stable Isotope Datamentioning

confidence: 99%

Carbonatos en vetas en el distrito epitermal de baja sulfuracion de El Peñon, II Region, Chile: ambiente de formacion e implicancias para la exploracion.

Bissig

Donoso

Guerra

et al. 2007

Andgeo

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Carbonate minerals are common gangue minerals in the low sulfidation epithermal Au-Ag District of El Peñón, II Región, Chile. They can be subdivided into two principal groups on the basis of the paragenetic relationships. Paragenetically early carbonates occur together with quartz and sulfide minerals in banded veins and are closely associated with precious metal mineralization. These carbonates are compositionally complex, consisting of calcite, finely intermixed with ankerite, kutnohorite, rhodochrosite and dolomite, but also contain up to 0.8 wt% PbCO 3 and up to 4.1 wt% ZnCO 3 . In contrast, the paragenetically late carbonates are relatively pure calcite, although dolomite has been recognized locally. Late calcites contain less than 3.5 wt% MnCO 3 , less than 0.5 wt% ZnCO 3 and less than 2.7 wt% FeCO 3 and are also distinct from the early carbonates in that they exhibit moderate to intense red fluorescence under short-wave ultraviolet light. O values for two of the late calcites and oxygen isotopic data of vein quartz from earlier studies suggest precipitation from a meteoric fluid, the heavy isotopic signature of most carbonates indicates that the mineralizing fluid was overall heterogeneous. δ 13 C values range between -8.9‰ and +1.5‰ relative to the Pee Dee Belemnite (VPDB) standard and are consistent with a meteoric or magmatic origin, in some samples probably with a minor contribution of organic carbon. Periodic involvement of a fluid with a strong magmatic component or, alternatively, meteoric water which has undergone extensive evaporation probably played an important role in the hydrothermal system. The complex stable isotope signature of El Peñón is interpreted as indicative for arid climatic conditions as a meteoric origin of the fluid is not as evident as in similar deposits emplaced in more pluvial regions. RESUMENCarbonatos en vetas en el distrito epitermal de baja sulfuración de El Peñón, II Región, Chile: ambiente de formación e implicancias para la exploración. En el distrito epitermal de Au-Ag de baja sulfuración de El Peñón, II Región, Chile, los carbonatos son minerales de ganga comunes. Estos minerales pueden ser subdivididos en dos grupos principales sobre la base de sus relaciones paragenéticas. Carbonatos paragenéticamente tempranos se encuentran junto a cuarzo y sulfuros en vetas bandeadas y están estrechamente asociados con la mineralización de metales preciosos. Estos carbonatos son composicionalmente complejos, consistiendo en calcita entrecrecida con ankerita, kutnohorita, rhodocrosita y dolomita, pero también contienen hasta 0,8% en peso de PbCO 3 y hasta 4,1% en peso de ZnCO 3 . En contraste, los carbonatos paragenéticamente tardíos son calcita relativamente pura, aunque localmente también se ha reconocido dolomita. Las calcitas tardías contienen menos de 3,5% en peso MnCO 3 , menos de 0,5% en peso de ZnCO 3 y menos de 2,7% en peso de FeCO 3 y también son distintas a los carbonatos tempranos en que se caracterizan por una fluorescencia roja moderada a intensa bajo luz ...

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Section: Stable Isotope Datamentioning

confidence: 99%

Carbonatos en vetas en el distrito epitermal de baja sulfuracion de El Peñon, II Region, Chile: ambiente de formacion e implicancias para la exploracion.

Bissig

Donoso

Guerra

et al. 2007

Andgeo

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“…1, Ibaraki and Suzuki, 1993). The deposit has been known to have extremely high grade gold ores since exploitation started in 1985 (Abe et al, 1986;Chadwick, 1989;Faure et al, 2002). Although the grade is now falling as mining progresses to deeper levels, production in 2002 was about 160,000 metric tons grading 45 g/t Au and 20 g/t Ag.…”

Section: Geologic Setting and Mineralizationmentioning

confidence: 99%

“…From this work they inferred that mineralizing fluids were a mixture of magmatic water and meteoric water. Faure et al (2002) expanded the existing oxygen and hydrogen isotope database to include six other veins, and also suggested that ore-bearing fluids may be mixtures of meteoric and magmatic waters.…”

Section: Geologic Setting and Mineralizationmentioning

confidence: 99%

Invisible Gold from the Hishikari Epithermal Gold Deposit, Japan: Implication for Gold Distribution and Deposition

Shimada¹,

Nakamura²,

Morinaga³

et al. 2005

Resource Geology

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Abstract:The presence of invisible gold was confirmed in arsenian pyrite from the Hishikari epithermal gold deposit, Kagoshima, Japan, by means of EPMA and SIMS analyses. The relative concentration of invisible gold may be positively correlated with As contents (0.01 to 10.37 wt%) of fine-grained arsenian pyrite which commonly occurs in the auriferous quartz veins. Although arsenian pyrite occurs widely in any mineralization stage with electrum and other sulfide, sulfosalts, selenide or telluride minerals, arsenian pyrites having higher As contents accompanied by invisible gold occur dominantly in the middle stage of fine-adularia-quartz and in the late stage of coarse-quartz rather than in the early stage of columnar-adularia.

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“…Based on Hand O-isotope studies, the ore-forming fluids in these systems are a combination of heated meteoric water (O'Neil et al, 1973;John et al, 2003;Simmons et al, 2005;Saunders et al, 2008;Saunders et al, 2015) and primary magmatic fluids (Matsuhisa and Aoki, 1994;Hayashi et al, 2000;Faure et al, 2002;Heinrich et al, 2004;Williams-Jones and Heinrich, 2004;Saunders et al, 2008;Saunders et al, 2015).…”

Section: Chapter 1 -Introductionmentioning

confidence: 99%

Copper Isotope Compositions of Cenozoic Mafic-Intermediate Rocks of the Northern Great Basin and Snake River Plain (Usa)

Maynard¹

2016

Geological Society of America Abstracts With Programs

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Mid-Miocene epithermal Au-Ag ores of the northern Great Basin USA are related to magmatism associated with the inception of the Yellowstone hotspot. The geochemical chemical connection between these ores and spatially and temporally related volcanism is not well understood, but has been suggested (Kamenov, 2007;Saunders et al., 2015). These Cu-and Pbisotope studies show that the ore and associated gangue minerals have different sources of Pb, which supports evidence that the metal(loids) originate from a deep magmatic source (Saunders et al., 2008). Cu isotopes as a tool for exploring linkages between ore deposits and related Moeller et al., 2012;Liu et al., 2014Liu et al., , 2015 suggesting that aquaregia leach may not be a preferable technique when analyzing volcanic rocks.iii

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The Hishikari Au-Ag Epithermal Deposit, Japan: Oxygen and Hydrogen Isotope Evidence in Determining the Source of Paleohydrothermal Fluids

Cited by 69 publications

References 38 publications

Carbonatos en vetas en el distrito epitermal de baja sulfuracion de El Peñon, II Region, Chile: ambiente de formacion e implicancias para la exploracion.

Carbonatos en vetas en el distrito epitermal de baja sulfuracion de El Peñon, II Region, Chile: ambiente de formacion e implicancias para la exploracion.

Invisible Gold from the Hishikari Epithermal Gold Deposit, Japan: Implication for Gold Distribution and Deposition

Copper Isotope Compositions of Cenozoic Mafic-Intermediate Rocks of the Northern Great Basin and Snake River Plain (Usa)

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