Pyrite geochemistry and metallogenic implications of Gutaishan Au deposit in Jiangnan Orogen, South China

Feng, Yuzhou; Zhang, Yu; Xie, Youliang; Shao, Yongjun; Lai, Chun‐Kit

doi:10.1016/j.oregeorev.2019.103298

Cited by 19 publications

(6 citation statements)

References 60 publications

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“…Some Au‐(Sb)‐W deposits are associated with Caledonian magmatic activity in the Baimashan area, for example, the Baizhuping Au and Yangjiashan scheelite deposits (W. Li et al, 2015; G. Q. Xie et al, 2019; G. Q. Zou, Pan, & Zhou, 2021). On the other hand, the Gutaishan Au‐Sb deposit, the Daping Au deposit, the Jiangxilong Au‐Sb deposit, the Nitanchong Sb‐As‐Au deposit, and the Chanziping Au deposit around the Baimashan granitic complex are related to Indosinian magmatic activity (Bao et al, 1999; M. H. Chen, 2016a; Feng et al, 2020; Fu et al, 2010; W. Li, 2019; Lu et al, 2019; Ma et al, 2016; J. Sun et al, 2020; Y. H. Xie et al, 2021; H. F. Yi et al, 2007; Y. P. Zhang, Zhang, et al, 2015; Zhao et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

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Petrogenesis and geodynamic implications of the Baimashan granitic complex in central Hunan, South China

et al. 2022

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The Baimashan granitic complex in central Hunan is a giant multiphase complex pluton within the South China Plate, which contains three phases (the Shuiche, Longtan-Xiaoshajiang, and Longcangwan superunits). It is located in the Jiangnan Orogenic Belt and is of great significance for the study of the regional tectonic magmatic evolution. Herein, we utilized zircon U-Pb dating, major and trace element geochemistry, and zircon Hf isotope geochemistry for three of the Baimashan granitic complexes; data for the Longcangwan superunit were obtained from previous studies. The new zircon U-Pb ages of 418 ± 3.2 Ma and 223 ± 2.6 Ma for the Shuiche and Longtan-Xiaoshajiang superunits, respectively, suggest the existence of Late Silurian and Late Triassic magmatism. Both superunits exhibited weak peraluminosity and high-K calc-alkaline and weak negative Eu anomalies, which are similar to those of I-type granites. The Longcangwan superunit showed strong peraluminosity and high-K calcalkaline and stronger negative Eu anomalies; Hf isotope and mineralogical evidence suggest that it is a fractionated I-type granite. The zircon Hf(t) values and two-stage depleted mantle Hf model ages revealed that the magma of the Baimashan granitic complex originates from the partial melting of metamorphic igneous rocks; the crustmantle differentiation age in the source area was 1.5-1.7 Ga for Longtan-Xiaoshajiang and Longcangwan and 1.7-1.9 Ga for Shuiche. The superunits formed in a post-collisional extensional tectonic setting. In the case of the Shuiche supersuit this is related to the remote effect of the interaction of the South China Plate with the Australian-Indian margin of Eastern Gondwana. The formation of the Longtan-Xiaoshajiang and Longcangwan superunits is linked to the remote effect of the Indosinian and South China Plate collision and the superimposition of the subduction of the Palaeo-Pacific Plate. The weakly fractionated I-type granite that formed during the Caledonian in South China is closely related to scheelite mineralisation.

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Section: Discussionmentioning

confidence: 99%

“…As mentioned above, the Indosinian Indosinian magmatic activity (Bao et al, 1999;M. H. Chen, 2016a;Feng et al, 2020;Fu et al, 2010;W. Li, 2019;Lu et al, 2019;Ma et al, 2016;J.…”

Section: Geodynamic Setting and Formation Modelmentioning

confidence: 97%

Petrogenesis and geodynamic implications of the Baimashan granitic complex in central Hunan, South China

et al. 2022

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“…The ore‐forming fluid responsible for pyrite with variable Ni contents (6.2–292 ppm) was widely considered to be derived from sedimentary rocks, instead of a magmatic source (Li et al ., 2018; Feng et al ., 2020). The metals in the hydrothermal fluid that formed the pyrite with low Co/Ni ratios and variable Ni contents in the Woxi deposit may be sourced from sedimentary rocks (Bralia et al ., 1979; Feng et al ., 2020). Moreover, the sulfides at the Woxi deposit are characterized by enrichment of LREE and slightly negative Eu, which are similar to the REE patterns of the Neoproterozoic basement rocks, suggesting a genetic relationship between the sulfides in the Woxi deposit with the Neoproterozoic basement rocks (Gu et al ., 2012; Li et al ., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Pyrite is a common mineral in hydrothermal deposits, and the contents of trace elements of pyrite have been extensively studied to explain the formation process, physicochemical conditions, and the source of ore‐forming materials of hydrothermal deposits (Reich et al ., 2005; Song et al ., 2019; Tian et al ., 2019; Feng et al ., 2020). In general, the concentrations of Au, Ag, Cu, Pb, Zn, Co, Ni, As, Sb, Se, Te, Hg, Tl, and Bi of pyrite are measurable (Reich et al ., 2005; Song et al ., 2019), and occur as a solid solution or as micro and/or nano‐inclusions (Thomas et al ., 2011; Ciobanu et al ., 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The Co/Ni ratios of most pyrite are lower than 1 in the Woxi deposit (Figure 9f), which are commonly associated with sedimentary/diagenetic origin (Bralia et al ., 1979). The ore‐forming fluid responsible for pyrite with variable Ni contents (6.2–292 ppm) was widely considered to be derived from sedimentary rocks, instead of a magmatic source (Li et al ., 2018; Feng et al ., 2020). The metals in the hydrothermal fluid that formed the pyrite with low Co/Ni ratios and variable Ni contents in the Woxi deposit may be sourced from sedimentary rocks (Bralia et al ., 1979; Feng et al ., 2020).…”

Section: Discussionmentioning

confidence: 99%

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Trace elements mineral chemistry of sulfides from the Woxi Au‐Sb‐W deposit, southern China

et al. 2021

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The Woxi Au‐Sb‐W deposit is one of the largest polymetallic ore deposits in the Xuefengshan Range, southern China, hosted in low‐grade metamorphosed Neoproterozoic volcaniclastic rocks. The orebodies of the deposit are predominantly composed of banded quartz veins, which are strictly controlled by bedding and faults. Petrographic observations and geochemical results are reported on the occurrence of Au and properties of the ore‐forming processes for different stages in the deposit. The veins extend vertically up to 2 km without obvious vertical metal zoning. The ore‐forming process can be subdivided into four mineralization stages: Pre‐ore stage; Early stage (scheelite‐quartz stage); Middle stage (pyrite‐stibnite‐quartz stage); and Late stage (stibnite‐quartz sage). Four types of pyrite (Py0, Py1, Py2, and Py3) were identified in the ores and host‐rock: Py0 occurs as euhedral grains with voids in the core, ranging in size from 50 to 100 μm and formed mainly in the Pre‐ore stage and Early stage; Py1 occurs as subhedral grains. Small grains (around 10 μm) of Py1 form irregularly shaped clusters of variable size ranging from tens to hundreds of μm and mainly formed in the Middle stage; Euhedral‐subhedral fine‐grained Py2 formed in the Late stage; Minor subhedral fine‐grained Py3 was deposited in the Late‐stage. Stibnite is widely distributed in the Middle and Late stage ore veins. No systemic difference was recognized in mineralogical features among stibnite formed in different stages. In addition to native gold, the lattice bound Au+1 widely exists in Py1 and Py2 in the deposit, and widespread Py1 is considered as the main Au‐bearing mineral with the highest Au contents. Most elements (such as Co, Ni, Cu, As, Sb, Ba, and Pb) are considered to occur as solid solution within the crystal lattice and/or invisible nanoparticles in sulfides minerals. The Co/Ni ratio of most pyrite is lower than 1, suggesting that the metals in the ore‐forming fluid are sourced from sedimentary rocks. The coupled behavior between Au and As; Au and Sb suggests that the substitution of As and Sb in pyrite can enhance the incorporation of Au. Variation of trace elements in pyrites of different stages suggests some information on the mineralization processes: Large ion lithophile elements (such as Ba and Pb) are enriched in Py0 indicating that water‐rock reaction occurred in the Early stage; Fine‐grained Py1 with a heterogeneous distribution of elements suggests fast crystallization of pyrite in the Middle stage.

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Genesis of the Jiuqu gold deposit, Jiaodong gold province, China: Constraints on the texture, mineral geochemistry, and sulfur isotope of pyrite

Xue,

Liang,

Shu

et al. 2024

Acta Geochim

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Pyrite geochemistry and metallogenic implications of Gutaishan Au deposit in Jiangnan Orogen, South China

Cited by 19 publications

References 60 publications

Petrogenesis and geodynamic implications of the Baimashan granitic complex in central Hunan, South China

Petrogenesis and geodynamic implications of the Baimashan granitic complex in central Hunan, South China

Trace elements mineral chemistry of sulfides from the Woxi Au‐Sb‐W deposit, southern China

Genesis of the Jiuqu gold deposit, Jiaodong gold province, China: Constraints on the texture, mineral geochemistry, and sulfur isotope of pyrite

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