Ore geology, fluid inclusions and O-S stable isotope characteristics of Shurab Sb-polymetallic vein deposit, eastern Iran

Mehrabi, Behzad; Fazel, Ebrahim Tale; Yardley, B. W. D.

doi:10.1016/j.geoch.2018.12.004

Cited by 11 publications

(3 citation statements)

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“…Positive and negative correlations of Cu with arsenic (Figure 11k) in Py-I and Py-II, respectively, suggest dissimilar fluid chemistry of Py-I and Py-II [45]. In addition, Cu also exhibits a weak to very weak geochemical association with Zn, Pb, and Sb in pyrites, inferring the dissimilar paragenesis sequences with the later elements (Figure 11l) [67]. These correlation diagrams differentiate the chemistry of Py-I from Py-II, which is also consistent with the textural study of different pyrites at the Kargah Cu-Pb polymetallic deposit.…”

Section: Trace Elements Incorporation Within Pyritementioning

confidence: 98%

“…Our study shows the presence of less abundant CO 2 -bearing and solid-bearing inclusions, high to an intermediate temperature, with moderate to low salinity (Figure 8 and Table 4), and evidence of fluid boiling and mixing of meteoric water. These characteristics are commonly used as a genetic marker of intrusion-related hydrothermal deposits [67,75,121,126]. The wall-rock alteration is comprised of silicification, sericitization, chloritization, and minor carbonatization.…”

Section: Deposit Genesismentioning

confidence: 99%

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Mineralogy, Fluid Inclusions, and Isotopic Study of the Kargah Cu-Pb Polymetallic Vein-Type Deposit, Kohistan Island Arc, Northern Pakistan: Implication for Ore Genesis

Hussain

Tao

et al. 2021

Minerals

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The Kargah Cu-Pb polymetallic deposit is a newly discovered ore deposit from the Gilgit-Baltistan region, located in the Kohistan Island Arc, northern Pakistan. However, this area is poorly researched on the ore genesis, and its origin and the evolution of its magmatic-hydrothermal system remain unclear. Three stages of mineralization were identified, including quartz-pyrite, quartz-sulfide, and carbonate representing early, middle, and late stages, respectively. The major ore minerals are pyrite, chalcopyrite, galena, and zincian tetrahedrite with minor native silver, and native gold mainly distributed in pyrite. Here, we present a systematic study on ore geology, hydrothermal alterations, trace element composition of pyrite, fluid inclusions, and isotopes (S and Pb) characteristics to gain insights into the nature of the ore-forming fluids, types of unknown deposits, and hydrothermal fluid evolution. The high Co/Ni ratio (1.3–16.4) and Co content (average 1201 ppm), the low Mo/Ni ratio (0.43–0.94) and Mo contents (average 108 ppm) of both Py-I and Py-II suggest a mafic source for the mineralization. The Au-Ni plots, Co-As-Ni correlation, and the δ34S values range from −2.8 to 6.4‰ (average of 3.4‰) indicating the affiliation of the mineralization with a mantle-derived magmatic-hydrothermal provenance. The Pb isotope data showing the narrow variations in 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb values suggest a single lead source from crustal-derived materials. The microthermometry data suggest that the dominant mechanisms are fluid boiling and mixing for mineral precipitation at temperatures ranging between 155 and 555 °C, and represent an intrusion-related magmatic-hydrothermal environment for the Kargah Cu-Pb polymetallic deposit.

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Section: Trace Elements Incorporation Within Pyritementioning

confidence: 98%

Section: Deposit Genesismentioning

confidence: 99%

Mineralogy, Fluid Inclusions, and Isotopic Study of the Kargah Cu-Pb Polymetallic Vein-Type Deposit, Kohistan Island Arc, Northern Pakistan: Implication for Ore Genesis

Hussain

Tao

et al. 2021

Minerals

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“…Light stable isotopes are widely used for tracing sources and physical-chemical peculiarities of fluids and their components in various types of hydrothermal ore deposits. Numerous studies on the O, H, C, S, and Pb isotope systematics in polymetallic deposits have been applied to trace the origin of ore-forming fluids [3][4][5][6][7][8]. The motivation for our research was to use a combination of multi-isotopes (H-O-C-S-Pb) and fluid-inclusion characteristics, to carry out the characterization of hydrothermal fluids in a polymetallic deposit.…”

Section: Introductionmentioning

confidence: 99%

Fluid Inclusions and H-O-C-S-Pb Isotope Studies of the Xinmin Cu-Au-Ag Polymetallic Deposit in the Qinzhou-Hangzhou Metallogenic Belt, South China: Constraints on Fluid Origin and Evolution

Duan

Jiang

2021

Geofluids

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Qinzhou-Hangzhou metallogenic belt is an important polymetallic (Cu, Mo, W, Sn, Pb, Zn, Au, and Ag) belt in South China. The Xinmin polymetallic deposit is located in the southwestern segment of this belt, which ore bodies hosted in the contact zone of granite and Lower Devonian sedimentary strata and in the structure fractured zone within the strata. Three hydrothermal stages can be distinguished: quartz+tourmaline+pyrite (early stage), tourmaline+pyrite+galena+bismuthinite+sphalerite+chalcopyrite+pyrrhotite (main stage), and quartz+calcite+dolomite (late stage). The mineralizing fluid system can be described as aqueous with medium-high salinity (2.7-50.7 wt.‰ NaCl equiv. in the main stage and 0.18-8.81 wt.‰ NaCl equiv. in the late stage) and medium-high temperature of 485°C to 205°C (main stage) and 300°C to 116°C (late stage). The trapping pressures varied from 2 MPa to 30 MPa (main stage) and 0.4 MPa to 9 MPa (late stage). The δ 18 O values of quartz range from 6.7‰ to 8.5‰, and the δ D values for fluid inclusions in quartz range from -45‰ to -52‰. The calcite has C-isotopes ranging from -5.8‰ to +0.7‰ and O-isotopes from +12.7‰ to 21.4‰. H-O-C isotope data are consistent with a hydrothermal fluid derived from the Cretaceous granitoid magma. The δ 34 S values of sulfides are -3.3‰ to +1.9‰. Sulfides have 206Pb/204Pb ratios of 18.377 to 18.473, 207Pb/204Pb ratios of 15.606 to 16.684, and 208Pb/204Pb ratios of 38.613 to 38.902. The S-Pb isotope data suggest derivation of S and Pb mainly from the Cretaceous granitic magma. It is concluded that the Xinmin deposit is a medium-high temperature, medium-high salinity hydrothermal polymetallic deposit, related to the granitic magmatism and strictly controlled by the fault and shattered zones.

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Fluid source and physicochemical conditions of the polymetallic mineralization in Gawuch Formation, Kohistan Island Arc, NW Pakistan

Farhan¹,

Arif²,

Ying³

et al. 2023

Geochemistry

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Ore geology, fluid inclusions and O-S stable isotope characteristics of Shurab Sb-polymetallic vein deposit, eastern Iran

Cited by 11 publications

References 42 publications

Mineralogy, Fluid Inclusions, and Isotopic Study of the Kargah Cu-Pb Polymetallic Vein-Type Deposit, Kohistan Island Arc, Northern Pakistan: Implication for Ore Genesis

Mineralogy, Fluid Inclusions, and Isotopic Study of the Kargah Cu-Pb Polymetallic Vein-Type Deposit, Kohistan Island Arc, Northern Pakistan: Implication for Ore Genesis

Fluid Inclusions and H-O-C-S-Pb Isotope Studies of the Xinmin Cu-Au-Ag Polymetallic Deposit in the Qinzhou-Hangzhou Metallogenic Belt, South China: Constraints on Fluid Origin and Evolution

Fluid source and physicochemical conditions of the polymetallic mineralization in Gawuch Formation, Kohistan Island Arc, NW Pakistan

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