Origin of Late Mesozoic igneous rocks in Southeastern China: implications for lithosphere subduction and underplating of mafic magmas

Xiao-hong, Zhou; Li, W.X.

doi:10.1016/s0040-1951(00)00120-7

Cited by 1,250 publications

(873 citation statements)

References 37 publications

Supporting

Mentioning

833

Contrasting

Unclassified

Order By: Relevance

“…Biotite-bearing monzogranites are previously considered as crustal transformation-type or S-type granites originated from regional Paleoproterozoic meta-sedimentary rocks that occur in the region (RGNTD, 1985;Li, 1991;Li et al, 2007b). However, some of them are recently classified as fractionationed I-type granites or A-type granites (Zhou and Li, 2000;Ma et al, 2004;Fu et al, 2004a;Bai et al, 2005;Jiang et al, 2005Jiang et al, , 2006Jiang et al, , 2009Jiang et al, , 2011Li et al, 2007e, 2014aHuang et al, 2011;Zhou et al, 2013). All these rocks constitute melts generated in an anorogenic, intraplate environment where regional lithospheric extension occurred in the Early Yanshanian Jiang et al, 2009Jiang et al, , 2011Zhou et al, 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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…The Late Mesozoic igneous rocks are dominated by felsic rocks, with minor mafic and intermediate rocks. Their ages range from 180 to 79 Ma (Li, 2000;Zhou and Li, 2000). In general, the Jurassic (180-140 Ma) igneous rocks scatter in the inland, while the Cretaceous (140-79 Ma) igneous rocks occur mainly in the coastal area, but some of them also occur in the inland area.…”

Section: Tectonic Setting For the Late Mesozoic Magmatism In Se Chinamentioning

confidence: 99%

“…It is commonly accepted that the magmatism in the coastal area was related to subduction of the paleo-Pacific plate underneath SE China (e.g., Jahn et al, 1976;Charvet et al, 1994;Lapierre et al, 1997;Zhou and Li, 2000). The ocean-continent paleo-suture is located along the Yuli highpressure, lower-temperature metamorphic belt in Taiwan, where blue schist and ophiolite complexes were found in the Tananao Basement Complex (Biq, 1971;Jahn et al, 1986).…”

Section: Tectonic Setting For the Late Mesozoic Magmatism In Se Chinamentioning

confidence: 99%

“…The granitoids in this region have low T DM (Nd depleted-mantle model age) relative to most of the granitoids elsewhere in SE China. Underplating and addition of mantle-derived magmas to the recycling materials were advocated to explain the origin of these granitoids (Zhou and Li, 2000). The Huichang Basin occurs along the NNEstriking Shicheng-Xinwu Fault (Fig.…”

Section: Regional Geology and Field Relationships Of Zhantang Andesitmentioning

confidence: 99%

“…1). Furthermore, the subduction of paleo-Pacific plate underneath SE China is believed to have disappeared by the end (about 100 Ma) of Early Cretaceous (Qiu et al, 1999;Zhou and Li, 2000), while the host rocks of the Zhantang andesites are the Late Cretaceous sandstones, which suggests the eruption of the Zhantang magmas lagged behind the subduction. In addition, the Zhantang andesites are different in Na 2 O and CaO contents from slab-derived adakites (Fig.…”

Section: Petrogenetic Model For the Zhantang Adakite-like Andesitic Mmentioning

confidence: 99%

See 2 more Smart Citations

Extremely high-Na adakite-like magmas derived from alkali-rich basaltic underplate: The Late Cretaceous Zhantang andesites in the Huichang Basin, SE China.

Xiong

et al. 2003

Geochem. J.

View full text Add to dashboard Cite

The Zhantang andesites, which erupted in the Late Cretaceous Huichang Basin of SE China interior, were associated with the Late Mesozoic lithospheric extension and basaltic underplating. They are highNa (6.59-8.46 wt% Na 2 O), high-Al trondhjemitic rocks with high Sr and Ba, low Y and HREE, and high Sr/Y and La/Yb ratios, similar to modern adakites. However, they are much higher in Na 2 O but lower in CaO than adakites. Their εNd(T) values of -2.3 to -3.8 and initial 87 Sr/ 86 Sr ratios of 0.707 to 0.708 are also significantly different from those of adakites with MORB-like isotopic compositions. These chemical and isotopic features, along with the tectonic setting, suggest that they were not produced by partial melting of subducting slab.The Zhantang adakite-like magmas may be derived from underplated basaltic lower crust, but require a compositionally peculiar basaltic protolith to account for their extremely high-Na and low-Ca feature. They are compositionally comparable to the experimentally produced partial melts of alkali-rich basalt. We therefore interpret them as the products of melting of an alkali-rich basaltic rock.

show abstract

Rifting and magmatism in the northeastern South China Sea from wide‐angle tomography and seismic reflection imaging

et al. 2014

View full text Add to dashboard Cite

We present a new travel time tomography velocity model and seismic reflection images that delineate the rift architecture and magmatic features of the rifted margin in the northeastern South China Sea. These data reveal moderately stretched crust~25 km thick along the continental shelf and thin but laterally variable crustal thickness in the distal margin. Along the continental slope, crust rapidly thins tõ 4 km in a basin characterized by tilted fault blocks that sole into a low-angle detachment. Strain was localized to a degree within the highly stretched basin but failed to progress to breakup and seafloor spreading. Crust in the distal margin is~12-15 km thick. Few extensional structures are apparent in the distal margin, but seismic velocities are suggestive of highly thinned and magmatically intruded continental crust. The magmatic features we interpret include volcanic zones at the top of the basement that deform or disrupt overlying postrift strata, sills intruded into the postrift sedimentary section, and a high-velocity (~6.9-7.5 km/s) lower crustal layer that we take to be magmatic underplating or pervasive lower crustal intrusions. These features primarily occur in the distal margin and may have been emplaced during postrift seafloor spreading. The postrift magmatism may have been induced by convective removal of continental lithosphere following breakup and the onset of seafloor spreading in the South China Sea.

show abstract

Origin of Late Mesozoic igneous rocks in Southeastern China: implications for lithosphere subduction and underplating of mafic magmas

Cited by 1,250 publications

References 37 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

Extremely high-Na adakite-like magmas derived from alkali-rich basaltic underplate: The Late Cretaceous Zhantang andesites in the Huichang Basin, SE China.

Rifting and magmatism in the northeastern South China Sea from wide‐angle tomography and seismic reflection imaging

Contact Info

Product

Resources

About