Geological and geochemical characteristics and genesis of the Chating copper-gold deposit in Xuancheng City, Anhui Province

Xu, Xiangde; Xu, Xinyue; Xie, Qiaoqin; Fu, Zhongyang; ShiLong, Qian; Xie, Zhongliang

doi:10.18654/1000-0569/2019.12.06

Cited by 13 publications

(6 citation statements)

References 12 publications

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“…1a,b). The FO, in the NE Jiangnan orogen, extends nearly 40 km and consists of serpentinized ultramafic rocks, cumulate pyroxenites, pegmatitic gabbros, diorites, spilites, keratophyres, tuffaceous slates and phyllites (Zhou et al, 1989;Yang et al, 1993;Ding et al, 2008;Yu et al, 2017;Shu et al, 2019), and hosts small chromitite bodies (Fig. 1c).…”

Section: Geological Background and Sample Descriptionmentioning

confidence: 99%

“…The whole assembly of the rocks makes itself as the most integrated ophiolite in the Jiangnan orogen. The most accepted tectonic setting of the FO is a back-arc basin (e.g., Yang et al, 1993;Zhang et al, 2012;Yu et al, 2017;Zheng et al, 2019) during the Neoproterozoic, and the zircon U-Pb dates of the gabbros, wehrlites, spilites, and anorthosites in the FO obtained by previous researchers, such as Ding et al (2008), Zhang et al (2012), Zhang et al (2013), Yu et al (2017) and Shu et al (2019), range from 860 Ma to 820 Ma.…”

Section: Geological Background and Sample Descriptionmentioning

confidence: 99%

“…The Fuchuan ophiolite (FO), one of the oldest in the South China block, is located at Shexian, Anhui Province in the northeasternmost segment of the Jiangnan orogen (Zhou et al, 1989;Wang X L et al, 2017), and it hosts a small high-Al podiform chromitite deposit. As the most integrated ophiolite in the Jiangnan orogen, the FO has been studied for decades (e.g., Zhou et al, 1989;Xing, 1990;Li et al, 1997;Ding et al, 2008;Zhang et al, 2012Zhang et al, , 2013Yu et al, 2017;Zheng et al, 2019;Shu et al, 2019); however, the tectonic setting of the FO is still a matter of ongoing debate with different hypotheses: Zhou et al (1989) suggested that the FO was formed in a small oceanic basin; Xing (1990) proposed an island arc setting; Li et al (1997) and Zhang et al (2012) recommended a back-arc basin at the continental margin; whereas most other researchers (e.g., Yang et al, 1993;Yu et al, 2017;Zheng et al, 2019) have been in favor of a back-arc basin setting.…”

Section: Introductionmentioning

confidence: 99%

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Genesis and Geodynamic Significance of Chromitites from the Fuchuan Ophiolite, Southern China, as Evidenced by Trace Element Fingerprints of Chromite, Olivine and Pyroxene

Liu

WANG

2023

Acta Geologica Sinica (Eng)

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The Fuchuan ophiolite is located in the northeasternmost segment of the Neoproterozoic Jiangnan orogen and consists mainly of harzburgites, with minor dunites, pyroxenite and gabbro veins and dykes. In order to investigate the genesis and tectonic setting of the Fuchuan ophiolite and chromitites, in situ analyses of unaltered chromites and silicates were carried out. Trace element analyses of unaltered chromites from the Fuchuan chromitites indicate the parental magma is of mid‐ocean ridge basalt (MORB)‐like origin, with the Ti/Fe3+#–Ga/Fe3+# diagram of chromites showing that the chromitites are a result of melt/rock interaction of MORB melts with mantle peridotites, and that the Fuchuan harzburgites present the dual features of MORB and supra‐subduction zone peridotites (SSZP). Trace and rare earth element (REE) analyses of olivines and orthopyroxenes from the Fuchuan harzburgites hint at the possibility of mantle metasomatism influenced by SSZ‐subducted fluids. Finally, integrating with previous study, the Fuchuan ophiolite and chromitites might have been formed in a back‐arc spreading ridge between the Yangtze and Cathaysia blocks during the Neoproterozoic.

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Section: Geological Background and Sample Descriptionmentioning

confidence: 99%

Section: Geological Background and Sample Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genesis and Geodynamic Significance of Chromitites from the Fuchuan Ophiolite, Southern China, as Evidenced by Trace Element Fingerprints of Chromite, Olivine and Pyroxene

Liu

WANG

2023

Acta Geologica Sinica (Eng)

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“…Flowchart of the fuzzy inference with uncertainty (Lisitsin et al, 2014). (Sources: Wang et al 1992;Cheng et al 2009;Yang et al 2010;Zhang et al 2012;Huang et al 2016)…”

Section: The Selection Of the Target Criteria And Evidential Classmentioning

confidence: 99%

Application of the improved Probabilistic Fuzzy Logic Inference Engine Model to evaluate Mineralization Prospectivity - Taking the Gejiu region of Yunnan, China as an example

Jie,

Yongqing,

Pengda

et al. 2023

Preprint

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A probabilistic fuzzy logic inference engine simulated by the Monte Carlo method is used to determine the mineralization prospectivity of Sn deposits in the Gejiu region, and the uncertainty of the mineralization prospectivity is evaluated. The elemental analysis of the fuzzy logic inference engine is improved, and the Hilbert-Huang transformation (HHT) multi-scale model is integrated. The copula function is proposed to solve the problem of correlation between elements. The probabilistic fuzzy logic inference engine simulated by the Monte Carlo method can provide more information than the traditional method. Its most significant advantage is that it can describe the potential and uncertainty of data and models, which are caused by random error and fuzziness. This information can be used in the subsequent risk assessment of the exploration targets. It can also determine the largest source of uncertainty in the final mineralization prospectivity map, thereby reducing the uncertainty.

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“…Globally, black shale is generally rich in Cd Liu et al,2020;Lavergren et al, 2009). The Low Cambrian Hetang Formation in the eastern China represents a quintessential region with high geological background levels of cadmium (Xin andSui,2022 Zhao et al,2018).…”

Section: Introductionmentioning

confidence: 99%

A Study on the Classification of Geological Background Source Cadmium Migration Phases in Zhejiang Provence, China

Zhou

Huang

et al. 2023

Preprint

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The release of cadmium during the natural weathering process of cadmium-containing strata constitutes a significant source of cadmium pollution in both water and soil. The Hetang Formation, located in western Zhejiang Province in China, is a typical example of a cadmium-rich black shale stratum. The bottom coal seam of this formation has been found to contain high levels of cadmium, with concentrations reaching up to 11.2 mg/kg. The continuous weathering and erosion of cadmium-bearing bedrock by fluvial processes results in the release of cadmium, leading to geological background cadmium contamination of downstream soils. This study relies on the strong adsorption characteristics of iron-sediment for cadmium during migration and uses FE-SEM, EDS, optical microscopes and other means to observe the distribution of iron elements in rock fragments of different weathering degrees in the Hetang Formation in river channels. The aim is to explore the state of cadmium from geological background sources during migration. By comparing detritus from upstream and downstream sections of the river channel, it was determined that under weathering conditions, the occurrence state of geological background source cadmium could be divided into three distinct stages: unweathered stage; intra-detritus migration stage; and completely weathered stage. Furthermore, after leaving the Hetang Formation shale outcrop area, there was a sharp decrease in content for Hetang Formation detritus. At this point geological background source cadmium had largely escaped from constraints imposed by rock structure and had come into full contact with water. The findings from this research deepen our understanding regarding migration patterns for geological background source cadmium. They also reveal formation processes for geological background source cadmium pollution and provide a theoretical basis for identification and treatment for geological background source cadmium pollution.

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Geological and geochemical characteristics and genesis of the Chating copper-gold deposit in Xuancheng City, Anhui Province

Cited by 13 publications

References 12 publications

Genesis and Geodynamic Significance of Chromitites from the Fuchuan Ophiolite, Southern China, as Evidenced by Trace Element Fingerprints of Chromite, Olivine and Pyroxene

Genesis and Geodynamic Significance of Chromitites from the Fuchuan Ophiolite, Southern China, as Evidenced by Trace Element Fingerprints of Chromite, Olivine and Pyroxene

Application of the improved Probabilistic Fuzzy Logic Inference Engine Model to evaluate Mineralization Prospectivity - Taking the Gejiu region of Yunnan, China as an example

A Study on the Classification of Geological Background Source Cadmium Migration Phases in Zhejiang Provence, China

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