Early Permian seafloor to continental arc magmatism in the eastern Paleo-Tethys: U–Pb age and Nd–Sr isotope data from the southern Lancangjiang zone, Yunnan, China

Hennig, Daniel; Lehmann, Bernd; Frei, Dirk; Belyatsky, B. V.; Zhao, Xin-Fu; Cabral, Alexandre Raphael; Pusheng, Zeng; Zhou, Mei‐Fu; Schmidt, Keegan L.

doi:10.1016/j.lithos.2009.04.031

Cited by 160 publications

(86 citation statements)

References 44 publications

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“…This oceanic domain isolated the Simao Block from the Indochina Block, forming two independent continental domains. The exact boundary of the western edge of the Simao Block is still an open question: it could correspond to the yet speculative Jinghong Suture Zone (e.g., Heppe et al, 2007;Hennig et al, 2009) or to the unambiguous Changning-Menglian Suture Zone (e.g., Wu H., et al, 1995;Heppe et al, 2007;Sone and Metcalfe, 2008). As the Changning-Menglian Suture Zone appears less controversial than the Jinghong Suture Zone, we favor this working hypothesis (Fig.…”

Section: Toward a Geodynamical Evolution Model For The Luang Prabang mentioning

confidence: 73%

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The volcaniclastic series from the Luang Prabang Basin, Laos: A witness of a triassic magmatic arc?

Rossignol

Bourquin

Poujol

et al. 2016

Journal of Asian Earth Sciences

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Section: Toward a Geodynamical Evolution Model For The Luang Prabang mentioning

confidence: 73%

“…West of the city of Simao, mafic rocks with an enriched to transitional MORB affinity, and inferred to represent the remnant of another early Permian oceanic paleolithosphere, have been reported in the Jinghong area (Hennig et al, 2009;Li G. et al, 2012;Fig. 1).…”

Section: Regional Settingmentioning

confidence: 99%

The volcaniclastic series from the Luang Prabang Basin, Laos: A witness of a triassic magmatic arc?

Rossignol

Bourquin

Poujol

et al. 2016

Journal of Asian Earth Sciences

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“…7). The igneous rocks with such an age-peak are usually observed along the Yuanjiang-Mojiang area of the Ailaoshan tectonic zone and Banpo area of the western Simao Block (Wen et al, 2013;Fan et al, 2010;Hennig et al, 2009;Jian et al, 2008;Li and Li, 2007;Li et al, 2006;Xie et al, 2006;He et al, 2003a, b). In addition, along the Ailaoshan-Song Ma tectonic zone, abundant Permian and Early Triassic granitic rocks are reported (Chen et al, 2013;Li et al, 2012;Liu et al, 2009).…”

Section: Provenance and Tectonic Implicationsmentioning

confidence: 99%

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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“…Study of Palaeotethys ophiolites and high pressure rocks (eclogites and blueschists) helps to work out the location of this suture in northern Iran (Zanchetta et al, 2009;Omrani et al, 2013;Shafaii Moghadam et al, 2015). Granitoids play an important role in this regard and study of granitoid plutons at different tectonic settings can help to reconstruct the geodynamic evolution of the Palaeotethys Ocean (Majidi, 1975;Debon et al, 1987;Erkül et al, 2008;Hennig et al, 2009). In the Talesh Mountain at the western continuation of the Alborz range, the Lisar granite occurs with tectonic contacts with Upper Cretaceous sandy limestone, which is covered by Paleogene polygenetic conglomerate.…”

Section: Discussionmentioning

confidence: 99%

“…Magmatic activities, especially granitoid magmatism, related to the Palaeotethys subduction are well documented along the suture in China. The magmatic arc at Yunnan area (southwestern Yunnan, China), with basaltic-andesitic to granodiorite composition has an age of 292-282 Ma (Hennig et al, 2009). I-type and S-type granitoids of Hindu Kush in Afghanistan have ages of 210,112 and 193 Ma,respectively (Debon et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

Whole Rock Geochemistry and Tectonic Setting of Jurassic Aged Lisar Granite, Talesh Mountains, North Iran

Seghinsara¹,

Karizaki²,

Moazzen³

et al. 2017

Bulletin of the Mineral Research and Exploration

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The Late Jurassic aged Lisar granite in North Iran is in tectonic contact of the form of thrust and strike slip faults with Upper Cretaceous sandy limestone and is covered by Paleogene polygenetic conglomerate in the Talesh Mountain at the western continuation of the Alborz range. The rock samples of the granite are pink coloured and coarse-gained with K-feldspar, quartz, plagioclase, biotite and amphibole. The Lisar granite is more likely emplaced in an extensional environment indicated with numerous space fi lling silica-rich aplitic veins in the rocks. The granite samples are moderately altered and feldspars are changed to sericite and clay minerals and biotite is partially converted to chlorite. The Lisar granite has derived from a high K magma and is A-type in nature, belonging to A 2 subgroup. The rock samples of granite are characterized by distinct negative Eu anomaly and a decrease from LREE to HREE contents. The parental melts of the granite were generated from partial melting of a lower continental crustal source with possible contribution from the mantle materials. The Lisar granite represents Cimmerian post-collision magmatism in north Iran following closure of Palaeotethys Ocean and subsequent collision. IntroductionPalaeomagnetic studies show that Iran was a part of Gondwana up to Early Carboniferous (Alavi, 1991;Majidi, 1991;Mirnejad et al., 2013; Shafaii Moghdam et al., 2015), Gorgan schists (Ghavidel et al., 2007;Delaloy et al., 1981), metamorphic rocks of the Gasht and Masuleh area (Clark et al., 1975) and Shanderman eclogites (Zanchetta et al., 2009;Omrani et al., 2013). The Palaeotethys suture can be traced to the east to Afghanistan and China and towards the west into Turkey . The Palaeotethys ocean closed 225 Ma ago which followed by uplifting of the Turan plate and emplacement of allochtonous nappes on the Iranian plate (Stampfl i, 1993). Magmatic activities, especially granitoid magmatism, related to the Palaeotethys subduction are well documented along the suture in China. The magmatic arc at Yunnan area (southwestern Yunnan, China), with basaltic-andesitic to granodiorite composition has an age of 292-282 Ma (Hennig et al., 2009). I-type and S-type granitoids of Hindu Kush in Afghanistan have ages of 210, 112 and 193 Ma, respectively (Debon et al., 1987). These granites with roughly Triassic age are traced westward into east of Iran, where the Binalud granites and granodiorites, dated 256 to 211 Ma (Majidi, 1978;Berberian and Berberian, 1981), are intruded into * Corresponding author: Mohssen MOAZZEN moazzen@tabrizu.ac.ir

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Early Permian seafloor to continental arc magmatism in the eastern Paleo-Tethys: U–Pb age and Nd–Sr isotope data from the southern Lancangjiang zone, Yunnan, China

Cited by 160 publications

References 44 publications

The volcaniclastic series from the Luang Prabang Basin, Laos: A witness of a triassic magmatic arc?

The volcaniclastic series from the Luang Prabang Basin, Laos: A witness of a triassic magmatic arc?

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

Whole Rock Geochemistry and Tectonic Setting of Jurassic Aged Lisar Granite, Talesh Mountains, North Iran

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