新疆北部弧-盆转化体系下铁氧化物-铜-金矿床的流体演化特征:来自卤族元素和稀有气体同位素的证据

Pei Liang; Huayong Chen; Liandang Zhao; Kendrick Mark; Hongjun Jiang; Weifeng Zhang; Chao Wu; Yuling Xie

doi:10.13745/j.esf.sf.2020.4.3

新疆北部弧-盆转化体系下铁氧化物-铜-金矿床的流体演化特征:来自卤族元素和稀有气体同位素的证据

Translated title of the contribution: Fluid evolution of iron oxide-Cu-Au (IOCG) deposits in the basin inversion setting, North Xinjiang: constraints from halogen and noble gas composition of fluid inclusions

Pei Liang, Huayong Chen^*, Liandang Zhao, Kendrick Mark, Hongjun Jiang, Weifeng Zhang, Chao Wu, Yuling Xie

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Represented by the Laoshankou, Qiaoxiahala and Heijianshan deposits, the northern margin of East Junggar and the Yamansu belt of East Tianshan are two important potential belts for iron oxide Cu-Au (IOCG) mineralization in North Xinjiang. All IOCG deposits in these two regions formed in a basin inversion setting and show significant two-stage mineralization. In this study, we used halogen and noble gases as reliable tracers to track the fluid sources and evolution of these deposits. The results showed that three different fluid end members are mainly involved in the mineralization processes of the three deposits: (1) the magmatic hydrothermal fluid, with I/Cl, Br/Cl and ⁴⁰Ar/³⁶Ar ratios of (16.3-18.0)×10^-6, (1.03-1.06)×10^-3 and 352-437, respectively, in the magnetite stage of the Heijianshan deposit; (2) surface-derived basin brine by seawater evaporation, with I/Cl, Br/Cl and ⁴⁰Ar/³⁶Ar ratios of (77.1-87.7)×10^-6, (1.53-1.80)×10^-3 and 672-883, respectively, in the copper-gold stage of the Laoshankou deposit; and (3) basin brine or formation water by water-rocks reaction and evaporate dissolution, with I/Cl, Br/Cl and ⁴⁰Ar/³⁶Ar ratios of (477-26 301)×10^-6, (0.39-1.28)×10^-3 and 288-510, respectively, as the main mineralizing fluids in the magnetite stage of the Laoshankou and Qiaoxiahala deposits and for the Cu-Au mineralization of the Qiaoxiahala and Heijianshan deposits. The obvious multi-stage mineralization and involvement of Ca-rich hypersaline non-magmatic brines in the Cu-Au stage in the iron oxide Cu-Au deposits in North Xinjiang resemble the characteristics of other IOCG type deposits in the world.

Translated title of the contribution	Fluid evolution of iron oxide-Cu-Au (IOCG) deposits in the basin inversion setting, North Xinjiang: constraints from halogen and noble gas composition of fluid inclusions
Original language	Chinese (Traditional)
Pages (from-to)	239-253
Number of pages	15
Journal	Earth Science Frontiers
Volume	27
Issue number	3
DOIs	https://doi.org/10.13745/j.esf.sf.2020.4.3
Publication status	Published - 1 May 2020

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@article{32f168aa2cb146a1a255fefe9f8aa967,

title = "新疆北部弧-盆转化体系下铁氧化物-铜-金矿床的流体演化特征:来自卤族元素和稀有气体同位素的证据",

abstract = "Represented by the Laoshankou, Qiaoxiahala and Heijianshan deposits, the northern margin of East Junggar and the Yamansu belt of East Tianshan are two important potential belts for iron oxide Cu-Au (IOCG) mineralization in North Xinjiang. All IOCG deposits in these two regions formed in a basin inversion setting and show significant two-stage mineralization. In this study, we used halogen and noble gases as reliable tracers to track the fluid sources and evolution of these deposits. The results showed that three different fluid end members are mainly involved in the mineralization processes of the three deposits: (1) the magmatic hydrothermal fluid, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (16.3-18.0)×10-6, (1.03-1.06)×10-3 and 352-437, respectively, in the magnetite stage of the Heijianshan deposit; (2) surface-derived basin brine by seawater evaporation, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (77.1-87.7)×10-6, (1.53-1.80)×10-3 and 672-883, respectively, in the copper-gold stage of the Laoshankou deposit; and (3) basin brine or formation water by water-rocks reaction and evaporate dissolution, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (477-26 301)×10-6, (0.39-1.28)×10-3 and 288-510, respectively, as the main mineralizing fluids in the magnetite stage of the Laoshankou and Qiaoxiahala deposits and for the Cu-Au mineralization of the Qiaoxiahala and Heijianshan deposits. The obvious multi-stage mineralization and involvement of Ca-rich hypersaline non-magmatic brines in the Cu-Au stage in the iron oxide Cu-Au deposits in North Xinjiang resemble the characteristics of other IOCG type deposits in the world.",

keywords = "Fluid evolution, Halogen, Iron oxide-Cu-Au deposit, Noble gas, North Xinjiang",

author = "Pei Liang and Huayong Chen and Liandang Zhao and Kendrick Mark and Hongjun Jiang and Weifeng Zhang and Chao Wu and Yuling Xie",

year = "2020",

month = may,

day = "1",

doi = "10.13745/j.esf.sf.2020.4.3",

language = "Chinese (Traditional)",

volume = "27",

pages = "239--253",

journal = "Earth Science Frontiers",

issn = "1005-2321",

publisher = "di xue qian yuan bian ji bu",

number = "3",

}

TY - JOUR

T1 - 新疆北部弧-盆转化体系下铁氧化物-铜-金矿床的流体演化特征:来自卤族元素和稀有气体同位素的证据

AU - Liang, Pei

AU - Chen, Huayong

AU - Zhao, Liandang

AU - Mark, Kendrick

AU - Jiang, Hongjun

AU - Zhang, Weifeng

AU - Wu, Chao

AU - Xie, Yuling

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Represented by the Laoshankou, Qiaoxiahala and Heijianshan deposits, the northern margin of East Junggar and the Yamansu belt of East Tianshan are two important potential belts for iron oxide Cu-Au (IOCG) mineralization in North Xinjiang. All IOCG deposits in these two regions formed in a basin inversion setting and show significant two-stage mineralization. In this study, we used halogen and noble gases as reliable tracers to track the fluid sources and evolution of these deposits. The results showed that three different fluid end members are mainly involved in the mineralization processes of the three deposits: (1) the magmatic hydrothermal fluid, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (16.3-18.0)×10-6, (1.03-1.06)×10-3 and 352-437, respectively, in the magnetite stage of the Heijianshan deposit; (2) surface-derived basin brine by seawater evaporation, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (77.1-87.7)×10-6, (1.53-1.80)×10-3 and 672-883, respectively, in the copper-gold stage of the Laoshankou deposit; and (3) basin brine or formation water by water-rocks reaction and evaporate dissolution, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (477-26 301)×10-6, (0.39-1.28)×10-3 and 288-510, respectively, as the main mineralizing fluids in the magnetite stage of the Laoshankou and Qiaoxiahala deposits and for the Cu-Au mineralization of the Qiaoxiahala and Heijianshan deposits. The obvious multi-stage mineralization and involvement of Ca-rich hypersaline non-magmatic brines in the Cu-Au stage in the iron oxide Cu-Au deposits in North Xinjiang resemble the characteristics of other IOCG type deposits in the world.

AB - Represented by the Laoshankou, Qiaoxiahala and Heijianshan deposits, the northern margin of East Junggar and the Yamansu belt of East Tianshan are two important potential belts for iron oxide Cu-Au (IOCG) mineralization in North Xinjiang. All IOCG deposits in these two regions formed in a basin inversion setting and show significant two-stage mineralization. In this study, we used halogen and noble gases as reliable tracers to track the fluid sources and evolution of these deposits. The results showed that three different fluid end members are mainly involved in the mineralization processes of the three deposits: (1) the magmatic hydrothermal fluid, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (16.3-18.0)×10-6, (1.03-1.06)×10-3 and 352-437, respectively, in the magnetite stage of the Heijianshan deposit; (2) surface-derived basin brine by seawater evaporation, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (77.1-87.7)×10-6, (1.53-1.80)×10-3 and 672-883, respectively, in the copper-gold stage of the Laoshankou deposit; and (3) basin brine or formation water by water-rocks reaction and evaporate dissolution, with I/Cl, Br/Cl and 40Ar/36Ar ratios of (477-26 301)×10-6, (0.39-1.28)×10-3 and 288-510, respectively, as the main mineralizing fluids in the magnetite stage of the Laoshankou and Qiaoxiahala deposits and for the Cu-Au mineralization of the Qiaoxiahala and Heijianshan deposits. The obvious multi-stage mineralization and involvement of Ca-rich hypersaline non-magmatic brines in the Cu-Au stage in the iron oxide Cu-Au deposits in North Xinjiang resemble the characteristics of other IOCG type deposits in the world.

KW - Fluid evolution

KW - Halogen

KW - Iron oxide-Cu-Au deposit

KW - Noble gas

KW - North Xinjiang

UR - http://www.scopus.com/inward/record.url?scp=85087616883&partnerID=8YFLogxK

U2 - 10.13745/j.esf.sf.2020.4.3

DO - 10.13745/j.esf.sf.2020.4.3

M3 - Article

SN - 1005-2321

VL - 27

SP - 239

EP - 253

JO - Earth Science Frontiers

JF - Earth Science Frontiers

IS - 3

ER -

新疆北部弧-盆转化体系下铁氧化物-铜-金矿床的流体演化特征:来自卤族元素和稀有气体同位素的证据

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