Importance of mantle derived fluids during granite associated hydrothermal circulation: He and Ar isotopes of ore minerals from Panasqueira 1 1Associate editor: R. Wieler

Burnard, P.; Polya, David A.

doi:10.1016/j.gca.2003.10.008

Cited by 120 publications

(83 citation statements)

References 49 publications

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“…4 He produced by the decay reaction of U and Th trapped in mineral lattice or fluid inclusions could decrease 3 He/ 4 He after mineral formation. Studies have shown and documented this in the Panasqueira [18] and Dae Hwa W-Mo deposits in South Korea [3]. Thorium is not dissolved in water; the content in inclusion fluid can be ignored.…”

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 97%

“…Therefore, nucleogenic 3 He also can be ignored. Pyrite and the like are known to be suitable He traps with low helium diffusivity [7,18,51], e.g. the original He is retained in sulfides at the late Paleozoic Sawuer gold deposit in Xinjiang, China and Panasqueira W-Cu-Sn deposit in Portugal, with almost no loss of He after mineral formation [18,19].…”

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

“…Pyrite and the like are known to be suitable He traps with low helium diffusivity [7,18,51], e.g. the original He is retained in sulfides at the late Paleozoic Sawuer gold deposit in Xinjiang, China and Panasqueira W-Cu-Sn deposit in Portugal, with almost no loss of He after mineral formation [18,19]. 4 He produced by the decay reaction of U and Th trapped in mineral lattice or fluid inclusions could decrease 3 He/ 4 He after mineral formation.…”

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

“…This also suggests that in situ radiogenic 4 He is one of the main factors leading to a decrease in the 3 He/ 4 He ratios in the samples. Compared to the large amount of Ar that is trapped in fluid inclusions, in situ production and diffusion of 40 Ar in pyrite is trivial and can be ignored [18,55,56]. Therefore, the variation of 40 Ar/ 36 Ar ratios in Table 2 is more likely due to changes in the proportion of atmospheric Ar that contaminates Ar derived from the fluids.…”

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

“…As a result, in many metal deposits, mantle-derived He was discovered in ore fluids [1][2][3][4][5][7][8][9][10]12,[15][16][17][18][19][20][21][22][23][25][26][27][28][29]. Mantle He in crustal rocks is intimately related to crust-mantle interaction, and the formation and evolution of mantle magma.…”

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confidence: 99%

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He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit, North Guangdong Province: Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

Zhai

Sun

et al. 2012

Chin. Sci. Bull.

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With the development of noble gas isotopic geochemistry, a tracing system for noble gas isotopes has gradually been applied to studies of ore fluid origins . As a result, in many metal deposits, mantle-derived He was discovered in ore fluids [1][2][3][4][5][7][8][9][10]12,[15][16][17][18][19][20][21][22][23][25][26][27][28][29]. Mantle He in crustal rocks is intimately related to crust-mantle interaction, and the formation and evolution of mantle magma. Mantle magma not only provides ore fluid for metallogenesis, but also provides heat for the hydrothermal circulation that results in mineralization. Southeastern China is an important area of tungsten and tin metallogenesis, both regionally and globally, with many large, supergiant deposits, such as the Xihuangshan, Dajishan, and Piaotang tungsten deposits in Jiangxi province, the Jubankeng and Yaoling-Meiziwo

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Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 97%

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

Section: Noble Gases In Minerals and Post Entrapment Modificationsmentioning

confidence: 99%

mentioning

confidence: 99%

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He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit, North Guangdong Province: Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

Zhai

Sun

et al. 2012

Chin. Sci. Bull.

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The W Deposit at Panasqueira (Portugal)

MARIGNAC,

CATHELINEAU

2023

Metallic Resources 1

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Genetic implications for the Damajianshan W‐Cu‐As polymetallic deposit in Lvchun, Southwest China: Constraints from H–O, He–Ar, S, and Pb isotopes

Zhang

Wen

et al. 2018

Geological Journal

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The Sanjiang Tethyan domain in SE Asia is one of the most important mineral belts in China. The Damajianshan (DMJS) W‐Cu‐As polymetallic deposit is located in the southern part of Sanjiang Tethyan domain, related to Triassic quartz porphyry. Detailed exploration thereafter shows that the reserves of W, Cu, and As are 0.09, 0.42, and 0.12 Mt, respectively. The W is a typical oxyphile element and always coexisted with Sn–Li–Be–Nb–Ta. The Cu–As are typical sulphophile elements and always coexisted with Au–Ag–Pb–Zn–Sb–Hg. It is rarely reported that a deposit preserves tungsten and copper–arsenic simultaneously in the southern Sanjiang region. In this study, the S–Pb isotopic ratios of sulphides, the H–O isotopic compositions of fluid inclusions in hydrothermal quartz, and the He–Ar isotopic ratios of fluid inclusions in sulphides were analysed to constrain the origin of the DMJS deposit. Studies have shown that the δ34S values of sulphides from ores are mainly between −6.17‰ and +0.02‰; the sulphur isotope compositions indicate that the ore‐forming materials might originate from deep sources. The Pb isotope characteristics indicate that the ore metals might originate from deep sources and be closely related to the quartz porphyry. The δ18Ofluid values of ore‐forming fluids calculated from hydrothermal quartz range from −5.5‰ to +7.5‰, and the δD values of the fluid inclusions in quartz are from −81.7‰ to −50.2‰. The H–O isotope systematics indicate that the ore fluids in the DMJS deposit were probably initially sourced from magmatic water and later gradually mixed with Mesozoic meteoric water. Fluid inclusions in pyrite, chalcopyrite, arsenopyrite, and pyrrhotite possess 3He/4He ratios of 0.02–0.05 Ra, and their 40Ar/36Ar ratios range from 562.47 to 4159.15, indicating a complete crustal fluids and with higher radiogenic 40Ar. The noble gas isotopic data, along with the stable isotopic data, suggest that the ore‐forming fluids have a deep source. The unique geologic structure of the Sanjiang Tethys tectonic metallogenic region and the evolution of ore‐forming fluids both promoted the formation of this rare DMJS deposit.

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Importance of mantle derived fluids during granite associated hydrothermal circulation: He and Ar isotopes of ore minerals from Panasqueira 1 1Associate editor: R. Wieler

Cited by 120 publications

References 49 publications

He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit, North Guangdong Province: Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit, North Guangdong Province: Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

The W Deposit at Panasqueira (Portugal)

Genetic implications for the Damajianshan W‐Cu‐As polymetallic deposit in Lvchun, Southwest China: Constraints from H–O, He–Ar, S, and Pb isotopes

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