U-Pb dating of early Mesozoic granodioritic intrusions in southeastern Hunan Province, South China and its petrogenetic implications

Wang, Yuejun; Wu, Fan; Guo, Feng; Li, Huimin; Liang, Xinmiao

doi:10.1360/02yd9030

Cited by 39 publications

(30 citation statements)

References 14 publications

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“…(1) Early Jurassic (180-160 Ma) igneous rocks are mainly distributed in the Nanling Range (Li et al 2007b;Wang et al 2005b and papers therein;Wang et al 2002;Yao et al 2005;Zhou et al 2006;Zhu et al 2006), with some adakitic porphyries (Wang et al 2006) in Dexing, Jiangxi Province. (2) Slightly younger (160-150 Ma) igneous rocks outcrop mainly in SE Hunan, SW Jiangxi, and northern Guangdong provinces (Li et al 2004b(Li et al , 2007cWang et al 2005b;Zhao et al 2006), and were probably formed in an intracontinental rift region like those in the Nanling Range.…”

Section: Mesozoic Igneous Rocks In Se Chinamentioning

confidence: 99%

“…The Dexing Cu deposits have been related to the partial melting of the delaminated lower continental crust in an extensional tectonic regime in the intracontinent Hou et al 2007), whereas Pb-Zn metallogenic deposits in SE China have been attributed either to melting of sedimentary crust, for example, Huangshaping Pb-Zn-W-Sn deposits and Lengshuikeng Ag-Pb-Zn deposits (Yao et al 2005(Yao et al , 2007Zuo 2008;Zuo et al 2008) or to I-type granite, for example, Shuikoushan Pb-Zn deposit (Wang et al 2002;Yao et al 2005) or taken as manganic skarn-type around or on some W-Sn deposit, for example, Nanfengao, Congshuban, and Shexing Pb-Zn deposits around Shizhuyuan W-Sn polymetallic deposit (Mao et al 2009). By contrast, W-Sn deposits are usually associated with S-type granites (Jiang et al 2008) with some mantle input (Zhu et al 2006;Li et al 2009), or highly evolved I/S-type granites (Ĉerny et al 2005;Li et al 2008).…”

Section: Oblique Subduction Modelmentioning

confidence: 99%

“…It has also been argued that W-Sn deposits formed in high Downloaded by [Guangzhou Institute of Geochemistry] at 00:00 09 February 2012 oxygen fugacity and post-magmatic hydrothermal alteration of the granite (Jiang et al , 2008. Deposits in SE China in the Mesozoic were usually considered to be formed in an intracontinental rifting regime (Wang et al 2002(Wang et al , 2006Hua et al 2003;Mao et al 2004;Ma et al 2006a;Hou et al 2007). Other geologists proposed that these deposits were related to westward subduction of the Pacific plate (Niu 2005;Pei et al 2007;Zaw et al 2007).…”

Section: Oblique Subduction Modelmentioning

confidence: 99%

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Mesozoic large magmatic events and mineralization in SE China: oblique subduction of the Pacific plate

Wang

Ling

Ding

et al. 2010

International Geology Review

192

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Section: Mesozoic Igneous Rocks In Se Chinamentioning

confidence: 99%

Section: Oblique Subduction Modelmentioning

confidence: 99%

Section: Oblique Subduction Modelmentioning

confidence: 99%

See 1 more Smart Citation

Mesozoic large magmatic events and mineralization in SE China: oblique subduction of the Pacific plate

Wang

Ling

Ding

et al. 2010

International Geology Review

192

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“…All zircon grains for U-Pb dating are light brown, prismatic and transparent with well-developed crystal faces, indicating that they are predominately magmatic (Wang et al, 2001). Four zircon grains from a Baoshan granodiorite are plotted on the concordia line with a mean 206 Pb/ 238 U apparent age of 173.3 ± 1.9 Ma (MSWD = 0.051) ( Fig.…”

Section: Zircon U-pb Datingmentioning

confidence: 99%

“…In addition to voluminous Mesozoic granites in this belt (e.g., HBGMR, 1986;Chen and Jahn, 1998) (Fig. 1(a)), some early Mesozoic high-K diorites-granodiorites and mantle xenoliths-bearing mafic volcanics are present in this zone (Guo et al, 1997a;Zhao et al, 1998;Wang et al, 2001) ( Fig. 1(b)).…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of early Mesozoic potassium-rich diorites-granodiorites in southeastern Hunan Province, South China: Petrogenesis and tectonic implications

Wang

Guo

2003

Geochem. J.

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The diorites-granodiorites emplaced at ca. 175 Ma in southeastern Hunan tectonic-magmatic belt (SHB), South China Block (SCB), are high-K calc-alkaline. They are characterized by LREE-LILE enrichment and HFSE depletion with slight or no Eu anomalies. Age-corrected initial 87 Sr/ 86 Sr ratio spans a narrow range of 0.707962~0.710396 and ε Nd (t) of -6.98~-2.30. These features are significantly different from those of the neighboring other Mesozoic granitic plutons (Eu/Eu* = 0.30-0.70; 87 Sr/ 86 Sr > 0.710; ε Nd = -12 to -16) in South China, which have been interpreted as the remelting products of Precambrian basement. The crust anatexis cannot account for the geochemical characteristics of these diorites-granodiorites in the SHB. The partial melting of an enriched lithosphere mantle directly produced mafic-intermediate rather than acid magma, and can also not explain the geochemical and isotopic variations exhibited by these diorites-granodiorites. These diorites-granodiorites likely represent partial melting products of mantle-derived basaltic rocks, which were underplated and hybridized with old crust material at lower/middle crust level. Theoretical modeling further suggests that this hybridized source consisted of 15-30% of the lower/middle crust and 70-85% of depleted mantle-derived basaltic rocks. The occurrence of these dioritegranodiorites in southeastern Hunan province therefore marked a major intra-lithospheric extension episode during early Mesozoic.

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Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

Palinkaš

Evans

et al. 2019

Geological Journal

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The Huangshaping world‐class W–Mo–Cu–Pb–Zn deposit formed during Jurassic intra‐continental extension in the central Nanling region (South Hunan), South China. In order to assess the role of fluids in ore genesis and the origin of polymetallic mineralization, three types of mineralized porphyries (quartz porphyry, granophyre, and granite porphyry) were studied. The multi‐method approach included whole‐rock Sr–Nd isotopic geochemistry and determination of the trace element content and gaseous and aqueous composition of ore minerals from the three stages of intrusion and ore emplacement. Geochemical results show that the Sr–Nd isotopes in these altered porphyries were strongly affected by fluid metasomatism. The 87Sr/86Sr and 147Sm/144Nd ratios for the quartz porphyry and granophyre range from 0.72894 to 0.83093 and 0.1524 to 0.2080, respectively, whereas higher and considerably more variable ratios were determined for the granite porphyry (0.90396 to 1.51943 and 0.2391 to 0.2914). These observations imply that granite porphyry‐associated W–Mo mineralization underwent more intensive fluid–rock interaction. The relatively low REE concentrations and high abundances of CH4 and H2 in the Cu ores associated with the quartz porphyry unambiguously suggest a deep‐sourced magmatic fluid for the Cu mineralization. The high REE concentrations, pronounced negative Eu anomalies, M‐type tetrad effects, and high CO2, H2O, and Ca2+ contents of the W–Mo ores associated with the granite porphyry imply that the W–Mo polymetallic mineralization was formed in a relatively oxidizing, high‐temperature environment with strong metasomatism. In contrast, the slightly negative Eu anomalies, W‐type tetrad effects, low CH4, and high F− and Cl− concentrations of the Pb–Zn ores indicate involvement of a sediment‐derived basinal brine and reducing mineralization conditions. Collectively, a three‐stage genetic model is proposed for the Huangshaping polymetallic deposit. Corresponding to initiation, development, and cessation of Jurassic intra‐continental extension, magmatic water, metasomatized fluids, and basinal brines played key sequential roles in Cu, W–Mo, and Pb–Zn mineralization.

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U-Pb dating of early Mesozoic granodioritic intrusions in southeastern Hunan Province, South China and its petrogenetic implications

Cited by 39 publications

References 14 publications

Mesozoic large magmatic events and mineralization in SE China: oblique subduction of the Pacific plate

Mesozoic large magmatic events and mineralization in SE China: oblique subduction of the Pacific plate

Geochemistry of early Mesozoic potassium-rich diorites-granodiorites in southeastern Hunan Province, South China: Petrogenesis and tectonic implications

Genesis of the Huangshaping W–Mo–Cu–Pb–Zn deposit, South China: Role of magmatic water, metasomatized fluids, and basinal brines during intra‐continental extension

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