Textural, compositional and isotopic characteristics of pyrite from the Zaozigou gold deposit in West Qinling, China: Implications for gold metallogeny

Du, Baoxia; Shen, Jian; Santosh, M.; Liu, Haiming; Liu, Jiajun; Wang, Yehan; Xu, Kexin

doi:10.1016/j.oregeorev.2020.103917

Cited by 22 publications

(5 citation statements)

References 113 publications

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“…The sample was sliced and polished to the vein wall perpendicularly and along the growth direction to clearly demonstrate that pyrite has the characteristics of sequential growth in multiple stages (Figure 1). According to previous research results [23], 0 µm is the starting point of pyrite vein growth, and 630 µm is the endpoint.…”

Section: Sample Preparationmentioning

confidence: 90%

The Relationship between Natural Pyrite and Impurity Element Semiconductor Properties: A Case Study of Vein Pyrite from the Zaozigou Gold Deposit in China

Wang

Shen

et al. 2021

Minerals

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Pyrite is a common sulfide mineral in gold deposits, and its unique thermoelectricity has received extensive attention in the field of gold exploration. However, there is still a lack of detailed research and direct evidence about how impurity elements affect mineral semiconductor properties. In this paper, combined with first-principles calculations, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) mapping technology and in situ Seebeck coefficient scanning probe technology were used to study the law of changing semiconductor properties in pyrite containing impurity elements such as As, Co, Ni, and Cu. The results showed that pyrite containing arsenic is a P-type semiconductor, and pyrites containing Ni, Co, Cu, and other elements are N-type semiconductors. When P-type pyrites containing As were supplemented with Ni, Cu, and other elements, the semiconductor type changed to N-type. However, Co addition did not change the semiconductor type of arsenic-rich pyrite. Pyrite formed under different temperature conditions tended to be enriched with different combinations of impurity elements, leading to the relative accumulation of P-type or N-type pyrites.

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Section: Sample Preparationmentioning

confidence: 90%

The Relationship between Natural Pyrite and Impurity Element Semiconductor Properties: A Case Study of Vein Pyrite from the Zaozigou Gold Deposit in China

Wang

Shen

et al. 2021

Minerals

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“…The analyses were carried out on an Agilent 7900 Quadrupole ICP‐MS coupled to a Photon Machines Analyte HE 193‐nm with ArF Excimer laser ablation system. The procedure and operation conditions are described in detail by Wang et al (2017) and Du et al (2020), which are summarized below. The samples were ablated in an atmosphere of ultra‐high purity He, which was used as a carrier gas (0.9 L/min), and the resulting aerosol was mixed with Ar (0.87 L/min) prior to introduction into the mass spectrometer.…”

Section: Samples and Analytical Methodsmentioning

confidence: 99%

Ore‐forming process of the Haigou gold deposit in the eastern Central Asian Orogenic Belt, NE China: Constrains from EPMA and LA‐ICP‐MS analysis of Au‐bearing pyrite

Chen

Zheng

et al. 2022

Resource Geology

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The Haigou lode deposit, containing 40 t of gold at an average grade of 3.5 g/t, is one of the largest deposits in the Jiapigou gold belt located along the eastern segment of the northern margin of the North China Craton. The deposit comprises 15 gold-bearing quartz veins hosted in a Carboniferous monzonitemonzogranite stock. Although many studies relating the genesis of this deposit have been carried previously, the understanding of ore-forming process remains controversial. In this study, we combined field geological mapping with petrography, Electron Probe Micro Analysis (EPMA) and in situ LA-ICP-MS analysis of gold-bearing pyrite to provide new insight into the genesis of the gold deposit. Our results show that Au in the Haigou gold deposit mainly exists in the form of native gold. LA-ICP-MS in situ multi-element mapping shows that Au has a significant positive correlation with Ag, Te, Bi and Pb in Au-bearing pyrite, indicating that these elements co-precipitated with Au in pyrite lattice. The ore-forming fluid existed under medium to low temperature, aiding complexing of the gold with sulfur, chlorine, and tellurium. Decoupling of sulfide and telluride complexes facilitated gold precipitation in the Haigou area. The abundance of lead and nickel tellurides in the Haigou gold deposits with general absence of tellurium in native gold is indicative of expulsion of tellurium through boiling during the process of fluid migration and evolution. Also, coexistence of Bi in native gold indicates that they were at Au-Bi eutectic. The gold-bearing pyrite is characterized by dispersed magnetite in and around the fractures. The Au-Te-Bi-Pb element anomalies indicate that fluid oxygen fugacity increases while sulfur fugacity decreases with time, resulting in Au precipitation. Our results provide a new theoretical basis for the establishment of metallogenic model and deep prospecting of the Haigou gold deposit.

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“…The trace element and S isotopes of pyrite can provide critical information to understand the source and evolution of the ore-forming fluids [33][34][35]. Based on the mineral assemblage, crosscutting relationships, trace element and S isotopes of pyrite, four types of pyrite have been recognized from the Sanhetun Te-Au deposit.…”

Section: Genesis Of Pyritesmentioning

confidence: 99%

Genesis of the Sanhetun Tellurium-Gold Deposit, Northeast China: Constraints from In Situ Elemental and Sulfur Isotopic Compositions of Pyrite and U-pb Dating of Calcite

Zhang,

Shen,

et al. 2024

Preprint

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The Sanhetun tellurium-gold (Te-Au) deposit, located in the Duobaoshan polymetallic metallogenic belt (DPMB) within the eastern section of the Central Asian Orogenic Belt (CAOB), is a newly discovered small scale gold deposit. The mineralization, with resource of ≥ 4t Au, is mainly hosted in 3 NNE-trending alteration zones between granitic mylonite and volcanogenic-sedimentary formations. It’s the genesis and timing of formation of this deposit are poorly constrained. Here, we report the results of petrographic studies, TESCAN Integrated Mineral Analyzer (TIMA), major and trace element concentrations, and in situ S isotope of pyrite and U-Pb ages of calcite. The results show that there are five species of telluride, including native tellurium, tetradymite, tsumoite, hessite and petzite and four types of pyrite, including coarse-grained euhedral Py1, fine-grained quartz-Py2 vein crosscutting Py1 and anhedral aggregated Py3 and Py4. The pre-ore Py1, containing negligible Au, Te and other trace elements, have a relatively narrow range of δ34S values ranging from -1.20 to -0.57‰. The Py2 have slightly high concentrations of Au and Te and distinctly high concentrations of Mo, Sb, Zn and Mn with markedly positive δ34S values of 4.67 to 14.43‰. The main ore stage Py3 contains high Au and Te concentrations and shows narrow δ34S values ranging from -5.69 to 0.19‰. The post-ore stage Py4 contains low Au concentrations with the δ34S values ranging from 2.66 to 3.86‰. Calcite from ore stage yield a U-Pb age of 135 ± 22 Ma, interpreted as the age of Te-Au mineralization. Our geochemical and geochronological data indicate that the Te was derived from partial melting of mantle metasomatized by the Te-rich fluids that originated from oceanic sediments. We correlate the tectonic setting with the subduction of Paleo Pacific plate in Early Cretaceous.

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Textural, compositional and isotopic characteristics of pyrite from the Zaozigou gold deposit in West Qinling, China: Implications for gold metallogeny

Cited by 22 publications

References 113 publications

The Relationship between Natural Pyrite and Impurity Element Semiconductor Properties: A Case Study of Vein Pyrite from the Zaozigou Gold Deposit in China

The Relationship between Natural Pyrite and Impurity Element Semiconductor Properties: A Case Study of Vein Pyrite from the Zaozigou Gold Deposit in China

Ore‐forming process of the Haigou gold deposit in the eastern Central Asian Orogenic Belt, NE China: Constrains from EPMA and LA‐ICP‐MS analysis of Au‐bearing pyrite

Genesis of the Sanhetun Tellurium-Gold Deposit, Northeast China: Constraints from In Situ Elemental and Sulfur Isotopic Compositions of Pyrite and U-pb Dating of Calcite

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