Gold mineralization in the Jiangnan Orogenic Belt of South China: Geological, geochemical and geochronological characteristics, ore deposit-type and geodynamic setting

Xu, Dong; Deng, Teng; Chi, Guoxiang; Wang, Zhilin; Zou, Fenghui; Zhang, Junling; Zou, Shaohao

doi:10.1016/j.oregeorev.2017.02.004

Cited by 112 publications

(46 citation statements)

References 128 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Qinling‐Dabie‐Sulu Orogen is located to the north margin of the SCB, which is adjoined to the Indosinian Block by the Red River Fault to the southwest (Li, Santosh, Zhao, Zhang, & Jin, ; K. Qiu & Deng, ; K. Qiu, Marsh, Yu, Pfaff, Gulbransen, Gou, & Li, ; K. Qiu et al, ). The Yangtze and Cathaysia blocks were amalgamated together to form the united SCC during the late Neoproterozoic (D. Xu et al, ; Yao, Shu, & Santosh, ; Yao, Shu, Santosh, & Li, ; Yao, Shu, Cawood, & Li, ; Yin et al, ; L. Zhao, Guo, et al, ; K. Zhao, Jiang, et al, ). However, during the later Neoproterozoic and early‐middle Ordovician, the SCB split again, resulting in a complex intracontinental rift arrangement (K. Qiu et al, ).…”

Section: Regional Geologymentioning

confidence: 99%

Ductile shear deformation and gold mineralization in the Hetai goldfield of the Yunkai Massif, South China Block

Liu

Wang

et al. 2019

Geological Journal

View full text Add to dashboard Cite

The Hetai goldfield, located at the northern edge of the Yunkai Massif in South China, is a significant gold deposit hosted within the Hetai ductile shear zone (HSZ). The deformation history of HSZ and its correlation with the gold mineralization are problematic. In this study, we conducted detailed field observations and microstructure analyses together with zircon U–Pb and muscovite 40Ar/39Ar geochronology on mylonitic granites, aiming to study the deformation features and processes of the ductile shear zone (DSZ) along with their further implications to the gold metallogenic mechanisms of the Hetai goldfield (HGF). The HGF and its periphery have undergone three phases of ductile shear event (DS) since the Palaeozoic: The first DS developed from 468 to 413 Ma, with deformation temperatures above 500°C, accompanied by the formation of large‐scale migmatite and magmatism. The second DS developed from 239 to 211 Ma, with deformation temperatures ranging from 400°C to 500°C and resulted in a low‐angle, top‐to‐the‐SE thrusting. The third DS developed from 198 to 162 Ma, with deformation temperatures between 300°C and 400°C and formed steep, dextral strike‐slip shear zones. The DSs in the HGF have close connection with the gold mineralization. The first DS is coeval with the small‐scale gold mineralization or sulfofication and laid the foundation for later large‐scale gold mineralization. The second DS had no obvious gold mineralization, but the DSZ that developed in this period, together with the earlier DSZs, may have provided a migration pathway for the later gold ore‐forming fluid. Occurrence of the third DS was combined with the main gold mineralization, but the large‐scale gold mineralization mainly occurred during 175–157 Ma, that is, the middle and later periods of dextral strike‐slip. Overall, multiphase DS dominated the large‐scale gold mineralization in this area.

show abstract

Section: Regional Geologymentioning

confidence: 99%

Ductile shear deformation and gold mineralization in the Hetai goldfield of the Yunkai Massif, South China Block

Liu

Wang

et al. 2019

Geological Journal

View full text Add to dashboard Cite

show abstract

“…The lithostratigraphic units in this region consist of Neoproterozoic Lengjiaxi Group (LJXG) low-grade metamorphic volcaniclastic and sedimentary rocks and Meso-Cenozoic red-bed sedimentary rocks, with minor Archean to Paleoproterozoic crystalline metamorphic rocks and Paleozoic sedimentary rocks [24]. A Basin-and-Range-style tectonic setting (Figure 1b), comprising extensional basins and granitic domes, as well as marginal strike-slip faults, formed during the late Mesozoic [24,[39][40][41]. Most of the granites in the JOB have been interpreted as S-type granites that formed from the Proterozoic, Early Paleozoic (Caledonian), and Early Mesozoic (Indosinian) to the Late Mesozoic (Yanshanian) [24,39,42].…”

Section: Regional Geologymentioning

confidence: 99%

“…A Basin-and-Range-style tectonic setting (Figure 1b), comprising extensional basins and granitic domes, as well as marginal strike-slip faults, formed during the late Mesozoic [24,[39][40][41]. Most of the granites in the JOB have been interpreted as S-type granites that formed from the Proterozoic, Early Paleozoic (Caledonian), and Early Mesozoic (Indosinian) to the Late Mesozoic (Yanshanian) [24,39,42].…”

Section: Regional Geologymentioning

confidence: 99%

“…Field and petrographic observations of most gold deposit in NEHP generally reveal four-stage mineral paragenesis, especially the quartz-pyrite-arsenopyrite and quartz-polysulfide stages, like the Zhengchong gold deposits (e.g., Wangu, Huangjindong) [24], which also consistent with worldwide orogenic gold deposit belts (e.g., the Yilgarn Craton) [80,81]. Belousov et al (2016) subdivide orogenic gold deposit in the Yilgarn Craton into Au-As and Au-Te groups based upon pyrite geochemistry, which may correspond to the PyII and PyIII (Figures 11 and 13a) [81].…”

Section: Implications For Fluid Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Trace Element Analysis of Pyrite from the Zhengchong Gold Deposit, Northeast Hunan Province, China: Implications for the Ore-Forming Process

2018

View full text Add to dashboard Cite

The Zhengchong gold deposit is located in the central segment of the Jiangnan Orogen in northeastern Hunan Province, South China. The host rocks of this deposit are the Neoproterozoic slates of the Lengjiaxi Group and granodiorite. The structures in the Zhengchong gold deposit are dominated by NE-trending reverse faults, which control the gold-bearing veins. The orebody consists of NE-trending laminated quartz veins and NW-trending quartz veins. The alteration styles include silicification, carbonatization, sulfidation, sericitization and chloritization. The Zhengchong gold mineralization can be divided into four stages: Quartz-pyrite (stage I), quartz-pyrite-arsenopyrite (stage II), quartz-polysulfide (stage III) and quartz-carbonate (stage IV). Three generations of hydrothermal pyrite were identified: Disseminated euhedral to subhedral cubes in altered wall-rock (PyI), euhedral to subhedral cubes inter-grown with arsenopyrite and tetrahedrite in quartz veins and wall-rock (PyII), and euhedral cubes with microinclusions (native gold, galena, sphalerite, chalcopyrite, tetrahedrite, and pyrrhotite) or metasomatic textures in sulfide-rich veins or veinlets (PyIII). PyII and PyIII are arsenian pyrite and represent the main Au-bearing minerals. PyI records the lowest concentrations of Au; PyII and PyIII record similar amounts of Au, Cu, Pb, Zn, and Bi, but PyIII is more enriched in Co, Ni, Te, and Se. The substitution of As, Se and Te for S and that of Co and Ni for Fe occurs by direct-ion exchange. Invisible gold is uniformly distributed within the arsenian pyrite, and visible gold fills microfractures in PyII or occurs as inclusions in PyIII. Co, Ni, Cu exhibit positive correlations with Au and a negative correlation between Au + Cu + Co + Ni and Fe reflect that Fe vacancies may have been a major cause of the precipitation of invisible Au and other metal elements in pyrite structure. There are systematic trace element differences between the three generations of pyrite (PyI, PyII, PyIII). The more Co, Ni and Se, Te substitution that occurred for Fe and S, respectively, the greater the increase in the Co/Ni ratio (<1) and the decrease in the Se/Te ratio (<10) in stage III, indicating that a more reduced, lower-temperature metamorphic hydrothermal fluid was present in stage III.

show abstract

“…Gold deposits hosted by the Lengjiaxi Group occur in quartz veins, altered slates, and breccia within ductile shear zones (e.g., the Wangu [36], Huangjindong, Yanlinshi, and Hongyuan gold deposits [27,37]). Base metal mineralization in vein, skarn, and porphyry-type deposits is associated with I-type granites south of the CPF (Figure 1b) [26], with copper being the dominant mineral resource.…”

Section: Regional Geology Of Northeastern Hunan Provincementioning

confidence: 99%

Indium Mineralization in a Sn-Poor Skarn Deposit: A Case Study of the Qibaoshan Deposit, South China

Liu

2017

Minerals

View full text Add to dashboard Cite

Indium (In) is commonly hosted in Sn-rich deposits but rarely reported in Sn-poor deposits. However, an In-rich and Sn-poor skarn deposit, the Qibaoshan Cu-Zn-Pb deposit, has been identified in south China. Geochemical analyses were undertaken on 23 samples representing the following mineral assemblages: sphalerite-pyrite, pyrite-chalcopyrite, pyrite-sphalerite-galena-chalcopyrite, pyrite, magnetite-pyrite, and magnetite. The results show that In is richest in the sphalerite-pyrite ores, with concentrations of 28.9-203.0 ppm (average 122.8 ppm) and 1000 In/Zn values of 2.7-10.9 (average 7.0). Other ore types in the Qibaoshan deposit are In poor, whereas all are Sn poor (10 to 150 ppm), with most samples having Sn concentrations of ≤70 ppm. Indium is mainly hosted by sphalerite, as inferred from the strong correlation between In and Zn, and weak correlation between In and Sn. Mineral paragenetic relationships indicate sphalerite formed from late quartz-sulfide stage of mineralization processes. Indium in the Qibaoshan deposit is richer in vein-type orebodies than in lenticular-type orebodies occurring at contact zones between carbonate and quartz porphyry, or in carbonate xenoliths. Igneous intrusions that were Sn poor and emplaced at shallow depths formed the In-rich orebodies of the Qibaoshan deposit.

show abstract

Gold mineralization in the Jiangnan Orogenic Belt of South China: Geological, geochemical and geochronological characteristics, ore deposit-type and geodynamic setting

Cited by 112 publications

References 128 publications

Ductile shear deformation and gold mineralization in the Hetai goldfield of the Yunkai Massif, South China Block

Ductile shear deformation and gold mineralization in the Hetai goldfield of the Yunkai Massif, South China Block

Trace Element Analysis of Pyrite from the Zhengchong Gold Deposit, Northeast Hunan Province, China: Implications for the Ore-Forming Process

Indium Mineralization in a Sn-Poor Skarn Deposit: A Case Study of the Qibaoshan Deposit, South China

Contact Info

Product

Resources

About