The Neoproterozoic granitoids from the Qilian block, NW China: Evidence for a link between the Qilian and South China blocks

Tung, Kuo An; Yang, Haw‐Ching; Liu, Dun Yi; Zhang, Jian Xin; Yang, Huai Jen; Shau, Yen Hong; Tseng, Chin Chung

doi:10.1016/j.precamres.2013.06.016

Cited by 129 publications

(108 citation statements)

References 58 publications

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“…Similarly, the ca. 800 Ma S-type granitoids from the Qilian and South China blocks are characterized by high CaO/Na 2 O (>0.3), low Rb/Sr (0.48-2.7), low Rb/Ba (0.1-0.7) and negative barium anomalies, and are derived from clay-poor psammitic rocks (Tung et al, 2013 and references herein).…”

Section: / 54mentioning

confidence: 99%

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

Song

Allen

et al. 2016

Precambrian Research

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Section: / 54mentioning

confidence: 99%

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

Song

Allen

et al. 2016

Precambrian Research

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“…The others fall on or close to the concordant curve with a weighted mean age of 926±4Ma (MSWD= 1.2, n = 24). The age result suggests that the granodiorites from the western Qilian block were formed in the early Neoproterozoic, which is consistent with the granites and metamorphosed mafic rocks from the Central to East Qilian block (Gehrels et al, 2003;Tung et al, 2007;Tung et al, 2012;Tung et al, 2013).…”

Section: Zircon U-pb Agementioning

confidence: 56%

“…1a), which is one of the key area to study the tectonic evolution of China. The Phanerozoic tectonic framework of Qilian Block has become increasingly clear, however, the understanding about the Precambrian tectonic framework has still a great deal of controversy (Wan et al, 2003;Gehrels et al, 2003;Tung et al, 2007;Song et al, 2012;Tung et al, 2012;Tung et al, 2013;Yu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Zircon U‐Pb age and geochemical characteristics of granodiorites from the western Qilian block

Ouyang

Zhu

et al. 2017

Acta Geologica Sinica (Eng)

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“…The zircon U–Pb age results show that magmatic‐thermal activity was almost continuous from 900 to 775 Ma, were most likely related to rift‐related igneous activity in the NQOB, which represents the prelude to the opening of the Qilian Ocean. This age component in the sediments overlaps with the age of rift‐related igneous activity in the NQOB, where mafic–ultramafic rocks, mafic dikes, and continental flood basalts have yielded zircon ages of 900–820 Ma (Dong et al, ; Xia et al, ; Wang, Du, Guan, Cao, & Zhang, ; Song et al, ; Tung et al, ; Yan et al, ). The 900 to 775 Ma igneous activities were thought to be related to breakup of the Rodinia supercontinent (Torsvik, ).…”

Section: Discussionmentioning

confidence: 81%

Detrital zircon record of rivers' sediments in the North Qilian Orogenic Belt: Implications of the tectonic evolution of the northeastern Tibetan Plateau

Kang

Chen

et al. 2018

Geological Journal

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The North Qilian Orogenic Belt (NQOB) is an important element of the northern edge of the Tibetan Plateau, and several rivers run along it. Zircon U–Pb dating, trace elements, and Hf isotopic data derived from the sediments carried by the rivers have been used to deduce the crustal evolution of the NQOB. U–Pb ages obtained from detrital zircons found in the sediments of the Zamu, Zhuanglan, and Beida rivers can be divided into five major age groups, that is, 2,600–1,500, 1,500–1,100, 1,100–650, 550–400, and 360–150 Ma, and the corresponding peaks occur at ~2,450, ~1,750, ~950, ~450, and ~250 Ma. Archean components, which may be derived from the ancient continental nucleus in the region, are rare in the river sediments. The zircon grains with ages of 360–150 Ma are most likely related to crustal thickening and decompression melting in a post‐collisional tectonic setting. The age distribution patterns indicate that the sediments carried by the Zamu, Zhuanglang, and Beida rivers are derived from the NQOB. Furthermore, the Hf isotopic compositions of Meso‐ and Neoarchean, Mesoproterozoic, Grenvillian, Pan‐African, Caledonian, and Hercynian zircon age groups exhibit a wide range of εHf (t) values, suggesting diverse sources. The existence of strongly negative εHf (t) values among the Grenvillian and Paleoproterozoic zircons indicates that the source magma included reworked Palaeoarchean crustal materials. New results indicate that continental rifting and the opening of the Qilian Ocean occurred at 775–520 Ma; the subduction and closure of the Qilian Ocean occurred at 520–440 Ma; arc–continent collision and continental subduction occurred at 440–420 Ma; and orogen collapse and extension occurred at 400–360 Ma. Our study indicates that the formation of the NQOB was mainly related to the evolutionary history of the Proto‐Tethys Ocean.

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The Neoproterozoic granitoids from the Qilian block, NW China: Evidence for a link between the Qilian and South China blocks

Cited by 129 publications

References 58 publications

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

An 850–820Ma LIP dismembered during breakup of the Rodinia supercontinent and destroyed by Early Paleozoic continental subduction in the northern Tibetan Plateau, NW China

Zircon U‐Pb age and geochemical characteristics of granodiorites from the western Qilian block

Detrital zircon record of rivers' sediments in the North Qilian Orogenic Belt: Implications of the tectonic evolution of the northeastern Tibetan Plateau

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