Blueschist-bearing metamorphic core complexes in the Qiangtang block reveal deep crustal structure of northern Tibet

Kapp, Paul; Yin, An; Manning, Craig E.; Murphy, Michael; Harrison, T. Mark; Spurlin, Matthew S.; Ding, Lin; Deng, Xiaoyun; Cun-Ming, Wu

doi:10.1130/0091-7613(2000)028<0019:bbmcci>2.3.co;2

Cited by 77 publications

(189 citation statements)

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“…[11]). By contrast, the other model proposes that this metamorphic belt represents an Trias-GEOCHEMISTRY SPECIAL TOPIC REVIEW sic mêlange that was underthrust from the Jinsa suture and then exhumed as a metamorphic core complex in the interior of the Qiangtang terrane [9,20,39] . The in situ suture model hints that there is a normal crust in Qiangtang and the tectonic evolution of the central Qiangtang metamorphic belt is a relatively insignificant event to the formation of the Tibetan Plateau.…”

Section: Tectonic Nature and Evolution Of The Central Qiangtang Uhp Mmentioning

confidence: 89%

“…The underthrust model suggests that the majority of Qiangtang is underlain by oceanic crust as well as overlying sedimentary rocks beneath a depth of ~10 km, and these underthrust sedimentary rocks could have evoked ductile flow in the lower crust, which could have caused crustal elevation. Ductile flow constitutes a possible mechanism for the uplift of the Tibetan Plateau [20,39,58,59] .…”

Section: Tectonic Nature and Evolution Of The Central Qiangtang Uhp Mmentioning

confidence: 99%

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Eclogites in the interior of the Tibetan Plateau and their geodynamic implications

Zhang

Tang

2009

Sci. Bull.

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Section: Tectonic Nature and Evolution Of The Central Qiangtang Uhp Mmentioning

confidence: 89%

Section: Tectonic Nature and Evolution Of The Central Qiangtang Uhp Mmentioning

confidence: 99%

Eclogites in the interior of the Tibetan Plateau and their geodynamic implications

Zhang

Tang

2009

Sci. Bull.

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“…28, which indicate that these cumulate gabbro was derived mainly from the depleted mantle [24]. In addition, blueschist and a tectonic mélange consisting of metabasites had been described in the Taoxinghu area [25,26]; the MORB-type metabasites may represent a fragment of pristine oceanic crust. MORB-type metabasites from the Taoxinghu and Guoganjianian areas are the record of Early Paleozoic Tethys Ocean.…”

Section: Geological Implicationsmentioning

confidence: 99%

SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang, northern Tibetan Plateau

Zhai

Wang

Cai

et al. 2010

Sci. China Earth Sci.

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Metabasites consisting of metamorphic ultra-mafic rocks, cumulate gabbro, gabbro (diabase), basalt, and plagiogranite are exposed at the Taoxinghu area in central Qiangtang, northern Tibetan Plateau. Zircon SHRIMP U-Pb dating for the cumulate gabbro yields a weighted mean age of 467±4 Ma, which is the oldest and most reliable magmatic age in this area. Zircon 176 Hf/ 177 Hf ratios range from 0.282615 to 0.282657, with ε Hf (t) values of 5.02±0.28, indicating that the cumulate gabbro was mainly derived from the depleted mantle. In addition, geochemical data of metabasites suggest that they have similar characteristics to those in the mid-ocean ridge basalts (MORB). The Taoxinghu metabasites may represent the fragment of Early Paleozoic ophiolite in the "Central Uplift" of the Qiangtang, northern Tibetan Plateau. Qiangtang, cumulate gabbro, SHRIMP dating, Hf isotope Citation:Zhai Q G, Wang J, Li C, et al. SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang,

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“…The Qiangtang Terrane, which were likely contiguous along the margin of Gondwana during the late Paleozoic time, is dominated by the Cenozoic/Quaternary strata and widespread marine Jurassic deposits, as well as Cambrian gneiss (Xu et al 1985;Kapp et al 2000;Pan 2000). The Tianshuihai terrane is covered by thick monotonous and partly metamorphosed successions of sedimentary rocks which exhibit a flyschoid character and was considered to be an accretionary prism formed as a result of northward consumption of PaleoTethys (Matte et al 1996;Mattern and Schneider 2000;Xiao et al 2003Xiao et al , 2005.…”

Section: Geology Of Wkomentioning

confidence: 98%

Geochemistry and geodynamic implications of the Triassic bimodal magmatism from Western Kunlun Orogen, northwest China

Liao

Jiang

Zhou

et al. 2011

Int J Earth Sci (Geol Rundsch)

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The Western Kunlun Orogen occupies a key tectonic position at the junction between the Tarim block and the Tethyan domain. However, the late Paleozoic to early Mesozoic, especially the middle to late Triassic tectonic evolution history of the Western Kunlun Orogen remains controversial. This study reports SHRIMP zircon U-Pb ages and geochemical as well as Sr-Nd-Hf isotopic data for middle to late Triassic Taer pluton in Western Kunlun Orogen, Northwest China. The Taer pluton shows a strong bimodal distribution of compositions, with the felsic rocks dominant and the mafic rocks subordinate. Zircon UPb dating reveals that the coexisting mafic and felsic rocks are coeval, both emplacing in a period between 234 and 225 Ma. Most of the studied rocks are potassium rich and can be classified into high-K calc-alkaline to shoshonitic series. They are also strongly enriched in LREE, LILE and depleted in HFSE with strong negative Ti and Nb anomalies, and characterized by enriched Sr-Nd-Hf isotopic signatures. Detailed geochemical and isotopic studies indicate that the Taer pluton was emplaced in a post-collisional extensional setting, with the mafic rocks derived from partial melting of the enriched continental lithospheric mantle in the spinel facies field, and the felsic rocks formed by anatexis of newly underplated basaltic rocks.

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Blueschist-bearing metamorphic core complexes in the Qiangtang block reveal deep crustal structure of northern Tibet

Cited by 77 publications

References 0 publications

Eclogites in the interior of the Tibetan Plateau and their geodynamic implications

Eclogites in the interior of the Tibetan Plateau and their geodynamic implications

SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang, northern Tibetan Plateau

Geochemistry and geodynamic implications of the Triassic bimodal magmatism from Western Kunlun Orogen, northwest China

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