Crustal evolution of southeastern China: Nd and Sr isotopic evidence

Chen, Jiangfeng; Jahn, Bor‐ming

doi:10.1016/s0040-1951(97)00186-8

Cited by 876 publications

(495 citation statements)

References 55 publications

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“…1a), which amalgamated during the Neoproterozoic Sibao (also called "Jiangnan" or "Jinning") orogeny (Chen and Jahn, 1998;Li, 1998aLi, , 1998bZhao et al, 2011). The YZB comprises Neo-Archean metamorphosed basement, sporadically exposed in Yunnan, Guizhou, and Hubei provinces (Gao et al, 1999;Qiu et al, 2000;Charvet, 2013).…”

Section: Regional Geologymentioning

confidence: 99%

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Liang

Dong

Jiang

et al. 2016

Ore Geology Reviews

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The Xitian tungsten-tin (W-Sn) polymetallic deposit, located in eastern Hunan Province, South China, is a recently explored region containing one of the largest W-Sn deposits in the Nanling W-Sn metallogenic province. The mineral zones in this deposit comprise skarn, greisen, structurally altered rock and quartz-vein types. The deposit is mainly hosted by Devonian dolomitic limestone at the contact with the Xitian granite complex. The Xitian granite complex consists of Indosinian (Late Triassic, and Yanshanian (Late Jurassic-Early Cretaceous, 165-141 Ma) granites. Zircons from two samples of the Xitian granite dated using laser ablationinductively coupled mass spectrometer (LA-ICPMS) U-Pb analysis yielded two ages of 225.6 ± 1.3 Ma and 151.8±1.4 Ma, representing the emplacement ages of two episodic intrusions of the Xitian granite complex. Molybdenites separated from ore-bearing quartz-veins yielded a Re-Os isochron age of 149.7±0.9 Ma, in excellent agreement with a weighted mean age of 150.3±0.5 Ma. Two samples of muscovites from ore-bearing greisens yielded 40 Ar/ 39 Ar plateau ages of 149.5±1.5 Ma and 149.4±1.5 Ma, respectively. These isotopic ages obtained from hydrothermal minerals are slightly younger than the zircon U-Pb age of 151.8±1.4 Ma of the Yanshanian granite in the Xitian area, indicating that the W-Sn mineralization is genetically related to the Late Jurassic magmatism. The Xitian deposit is a good example of the Early Yanshanian regional W-Sn ore-forming event (160-150 Ma) in the Nanling region. The relatively high Re contents (8.7 to 44.0 ppm, average of 30.5 ppm) in molybdenites suggest a mixture of mantle and crustal sources in the genesis of the ore-forming fluids and melts. Based upon previous geochemical studies of Early Yanshanian granite and regional geology, we argue that the Xitian W-Sn polymetallic deposit can be attributed to back-arc lithosphere extension in the region, which was probably triggered by the break-off of the flat-slab of the Palae-Pacific plate beneath the lithosphere.

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Section: Regional Geologymentioning

confidence: 99%

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Liang

Dong

Jiang

et al. 2016

Ore Geology Reviews

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show abstract

“…Mesozoic igneous rocks associated with the collision between several microcontinents and the Yangtze Block yield U-Pb ages between 280 and 220 Ma (Hoa et al, 2008;Roger et al, 2012;Chen et al, 2014). Middle Jurassic to Cretaceous basaltic lavas and related mafic dikes ranging from 180 to 80 Ma are located in western and eastern Yangtze Block (Chen and Jahn, 1998;Wang et al, 2003;Li et al, 2004;Cheng and Mao, 2010). The Truong Son Belt of the Indochina Block is characterized by Silurian, Permian-Triassic granites and high-grade metamorphic rocks formed during the Caledonian and Indosinian Orogeny events, respectively.…”

Section: Possible Sediment Sourcesmentioning

confidence: 99%

Zircon U-Pb geochronology and heavy mineral composition constraints on the provenance of the middle Miocene deep-water reservoir sedimentary rocks in the Yinggehai-Song Hong Basin, South China Sea

Liang

Foster

Xie

et al. 2016

Marine and Petroleum Geology

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“…SE China is underlain by relatively young, middle to late Proterozoic continental lithosphere, whereas NE China is underlain by Archaean to early Proterozoic continental lithosphere (e.g., Chen and Jahn, 1998). PGE geochemistry of volcanic rocks in SE China, with significantly lower PGE concentrations, is also distinctly different from that of the Hannuoba basalts, NE China (Chu et al, 1999).…”

Section: Implications For the Genesis Of Eastern China Basaltsmentioning

confidence: 99%

Chalcophile elemental constraints on sulfide-saturated fractionation of Cenozoic basalts and andesites in SE China

Yang

Zhao

et al. 2011

Lithos

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Crustal evolution of southeastern China: Nd and Sr isotopic evidence

Cited by 876 publications

References 55 publications

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Zircon U-Pb geochronology and heavy mineral composition constraints on the provenance of the middle Miocene deep-water reservoir sedimentary rocks in the Yinggehai-Song Hong Basin, South China Sea

Chalcophile elemental constraints on sulfide-saturated fractionation of Cenozoic basalts and andesites in SE China

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