Petrogenesis of early Paleozoic peraluminous granite in the Sibumasu Block of SW Yunnan and diachronous accretionary orogenesis along the northern margin of Gondwana

Wang, Yuejun; Xing, Xiaowan; Cawood, Peter A.; Lai, Shaocong; Xia, Xiaoping; Wu, Fan; Liu, Huichuan; Zhang, Feifei

doi:10.1016/j.lithos.2013.09.010

Cited by 154 publications

(103 citation statements)

References 101 publications

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“…The Himalayan granitic belt has been intruded in the Proterozoic metasedimentary sequence during the Cambrian-Ordovician time (LeFort, 1986) confirmed by U-Pb dating from different regions (~460 Ma to ~510 Ma) (e.g. DeCelles et al, 1998;Wang et al, 2013). This granite belt extends for around 1900 km along strike from southeast of Kathmandu (Nepal) to at least NW Pakistan (LeFort et al, 1986).…”

Section: Tectonic Division Of Himalayasmentioning

confidence: 95%

“…Block, SW China (Dong et al, 2013), Shan-Thai block, SW China (Wang et al, 2013), Tso Morari granites (Girard and Bussy, 1999) and Mandi Granite (Miller et al, 2001) is also shown for comparison …………………………………………………………….. of Gondwana supercontinent (modified after Wang et al, 2010Wang et al, , 2013. North Indian orogeny (Bhimphedian) is shown by several granitic plutons having similar age range.…”

Section: Introductionmentioning

confidence: 99%

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Petrographic features as an effective indicator for the variation in strength of granites

Sajid

Coggan

Arif

et al. 2016

Engineering Geology

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The important textural features include average grain size of rock, grain boundary recrystallization, maximum grain size of major rock forming minerals, mean grain size of cleaved minerals, mineral exsolution and variation of grain size within a rock. The petrographic observations, however, are more effective to describe the strength variation of granites having analogous weathering grade as change in degree of weathering has a dominant effect on rock mechanics.

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Section: Tectonic Division Of Himalayasmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Petrographic features as an effective indicator for the variation in strength of granites

Sajid

Coggan

Arif

et al. 2016

Engineering Geology

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“…1a-1b;Liu et al, 2009;Zhong, 1998;Metcalfe, 1996). The Simao Block is considered to have an affinity to the Yangtze Block, which consists of Archean to Paleoproterozoic crystalline basement and Neoproterozoic to Paleozoic and marine sediments (Cawood et al, 2013;Gao et al, 1999), and to represent the northern extension of the Indochina Block (Zhong, 1998;Metcalfe, 1996), In the Simao Block, Lower Paleozoic metasedimentary rocks are overlain by the Middle Devonian conglomerates by an unconformity (Feng et al, 2000;Zhong, 1998;Yunnan BGMR, 1990). The Ailaoshan suture zone comprises structurally juxtaposed successions of variably metamorphosed Proterozoic and younger rock assemblages.…”

Section: Geological Backgroundmentioning

confidence: 99%

“…In order to better evaluate the provenance of the Wuliangshan Group, it is statistically synthesized for the reported detrital zircon U-Pb ages for Late Paleozoic sedimentary rocks from the Yangtze, Cathaysia Block and the Ailaoshan and Tethys-Himalayan tectonic zones (Li D P et al, 2015;Nie, 2015;Wang Q F et al, 2014;Usuki et al, 2013;Wang Y J et al, 2013Wang Y J et al, , 2007Li X H et al, 2012Li X H et al, , 2009Li X H et al, , 2008Dong et al, 2011;Duan et al, 2011;Yan Y et al, 2011;Zhu et al, 2011;Li R B et al, 2010;Myrow et al, 2010;Yu et al, 2010;Wan et al, 2010Wan et al, , 2007Wang G S et al, 2009;McQuarrie et al, 2008;She, 2007;Yan D P et al, 2006;Zhang et al, 2006;Zheng et al, 2006;Xu et al, 2005;Gehrels et al, 2003), as shown in Fig. 7.…”

Section: Provenance and Tectonic Implicationsmentioning

confidence: 99%

“…Figure 7. Frequency pattern of detrital zircon U-Pb ages for the sedimentary rocks from the Cathaysia (data are from Li et al, 2012;Yu et al, 2010;Wan et al, 2010Wan et al, , 2007Wang G S et al, 2009;Wang Y J et al, 2007;Yan et al, 2006;Xu et al, 2005) and Yangtze Block (data are from Duan et al, 2011;Yan et al, 2011;Li R B et al, 2010;Li X H et al, 2009Li X H et al, , 2008She, 2007;Zhang et al, 2006;Zheng et al, 2006), Tethyan-Himalaya (data are from Li et al, 2015;Usuki et al, 2013;Wang et al, 2013;Dong et al, 2011;Zhu et al, 2011;Myrow et al, 2010;McQuarrie et al, 2008;Gehrels et al, 2003) and Ailaoshan tectonic zone (data are from Nie, 2015 andWang et al, 2014), along with Wuliangshan Group (this study).…”

Section: Provenance and Tectonic Implicationsmentioning

confidence: 99%

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Detrital zircon U-Pb geochronology and Lu-Hf isotopic compositions of the Wuliangshan metasediment rocks in SW Yunnan (China) and its provenance implications

Xing

Wang

Zhang³

2016

J. Earth Sci.

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The Wuliangshan Group occurs to the east of the Lancang giant igneous zone in SW Yunnan, and is mainly composed of low-grade metamorphosed sedimentary rocks. The group has been considered as the syn-orogenic product of the Baoshan with Simao-Indochina blocks. However, its depositional time and provenance remain to be poorly constrained. This paper presents zircon U-Pb dating and Lu-Hf-isotopic data for five representative sandstone samples from the Wuliangshan Group. The detrital grains yield a major age-peak at ~259 Ma, and four subordinary age-peaks at ~1 859, ~941, ~788, and ~447 Ma, respectively. Our results suggest that the Wuliangshan metasedimentary sequence was deposited after Middle Triassic rather than previously-thought Cambrian. The detrital zircon age spectrum, along with in-situ Lu-Hf isotopic data suggest that the Wuliangshan Group might be a syncollisional sedimentary product related to the collision of Baoshan with Simao-Indochina blocks. It is inferred that the provenance of the Wuliangshan Group is mainly from the Simao/Yangtze blocks to the east rather than the Baoshan Block or Lancang igneous zone to the west. KEY WORDS: detrital zircon U-Pb dating, Lu-Hf isotopic composition, Wuliangshan sandstone sequence, Middle Triassic, Simao-Indochina. INTRODUCTIONThe SE Asia has been assembled by a series of collision and accretion processes involving numerous continental blocks or fragments separated from the East Gondwana since the Paleozoic (Faure et al., 2014;Metcalfe, 2006). The catchment areas of the Lancang, Jinsha and Nujiang rivers (also named Sanjiang in Chinese literature) in SW Yunnan (SW China) have preserved abundant paleotethyan heritages (e.g., the Lincang giant igneous zone) at which kilometer-thick Triassic volcanic rocks and Upper Triassic/Lower Jurassic molasse sediments are considered to have resulted from closure of the Paleotethys main ocean and subsequent continental collision (Peng et al., 2008(Peng et al., , 2006 Jian et al., 2003a, b;Mo et al., 1998;Zhong, 1998; Cong et al., 1993;Mahawat et al., 1990;Liu et al., 1989;Zhang et al., 1985).It has been commonly accepted that the Paleotethys main ocean was closed by an eastward subduction beneath the Indochina-Simao Block in the Permian-Triassic (Zaw et al., 2014;Wang et al., 2010). However, the precise timing of the initial collision of the Baoshan and Simao-Indochina blocks remains to be disputed. Previous studies focused on the origin of the Triassic igneous rocks along the Lancangjiang tectonic zone. Little attention has been paid to the coeval sedimentary rocks which preserved abundant geological records on the Paleotethyan tectonic evolution. The sedimentary rocks can provide key information to the time of closure of the Paleotethyan Ocean and subsequent collision of the Baoshan and Simao-Indochina blocks. The Wuliangshan Group occurs to the east of the Lancang giant igneous zone. It is mainly composed of low-grade metamorphosed sedimentary rocks. This group is likely syn-orogenic product of the Paleotethyan orog...

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Terminal suturing of Gondwana along the southern margin of South China Craton: Evidence from detrital zircon U-Pb ages and Hf isotopes in Cambrian and Ordovician strata, Hainan Island

Cawood

et al. 2014

Tectonics

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Petrogenesis of early Paleozoic peraluminous granite in the Sibumasu Block of SW Yunnan and diachronous accretionary orogenesis along the northern margin of Gondwana

Cited by 154 publications

References 101 publications

Petrographic features as an effective indicator for the variation in strength of granites

Petrographic features as an effective indicator for the variation in strength of granites

Detrital zircon U-Pb geochronology and Lu-Hf isotopic compositions of the Wuliangshan metasediment rocks in SW Yunnan (China) and its provenance implications

Terminal suturing of Gondwana along the southern margin of South China Craton: Evidence from detrital zircon U-Pb ages and Hf isotopes in Cambrian and Ordovician strata, Hainan Island

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