Rendeng Shi

Institute of Tibetan Plateau Research

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Jingsui Yang

Chinese Academy of Geological Sciences

Cailai Wu

Chinese Academy of Geological Sciences

Jianxin Zhang

Czech Academy of Sciences, Institute of Geology

Xiaohan Gong

China University of Geosciences (Beijing)

Haibing Li

Ministry of Natural Resources

Qi‐Shuai Huang

Chinese Academy of Sciences

Zhiqin Xu

Nanjing University

Joseph L. Wooden

Stanford University

Ben‐Xun Su

University of Chinese Academy of Sciences

Haibo Zou

Auburn University

Cooperative Institutions

Chinese Academy of Sciences

Chinese Academy of Geological Sciences

Ministry of Natural Resources

University of Chinese Academy of Sciences

China University of Geosciences (Beijing)

Czech Academy of Sciences, Institute of Geology

China University of Geosciences

Institute of Geology and Geophysics

Institute of Tibetan Plateau Research

Center for Excellence in Tibetan Plateau Earth Sciences

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Discovery of coesite in the North Qaidam Early Palaeozoic ultrahigh pressure (UHP) metamorphic belt, NW China

Comptes Rendus de l Académie des Sciences - Series IIA - Earth and Planetary Science (2001)

Jingsui Yang Zhiqin Xu Shuguang Song Jianxin Zhang Cailai Wu

Coesite and graphite were discovered as inclusions in zircon separates from pelitic gneiss associated with a large eclogite body in the North Qaidam UHP terrane. This finding suggests UHP metamorphism at pressures below the diamond stability field. This supports previous indirect UHP evidences, such as polycrystalline quartz inclusions in eclogitic garnet, quartz lamellae in omphacite and P–T estimates for both eclogite and garnet peridotite. The U/Pb and Sm/Nd isotopic ages from the North Qaidam eclogite indicated that continental subduction occurred in Early Palaeozoic, most probably in relation with the collision between the Sino-Korean and Yangtze plates. De la coésite et du graphite ont été identifiés en inclusion dans des zircons de gneiss pélitiques associés à un massif d'éclogite des terrains métamorphiques de très haute pression des chaı̂nons montagneux du Nord du Qaidam, dans le Nord-Est du plateau du Tibet en Chine. Cette découverte suggère un métamorphisme de type UHP dans des conditions de pression inférieures au champ de stabilité du diamant et conforte les observations antérieures de quartz polycristallin en inclusion dans des grenats éclogitiques, de lamelles d'exsolution de quartz dans de l'omphacite et les données P, T préliminaires sur les éclogites et les péridotites. Les âges U/Pb et Sm/Nd des éclogites du Nord-Qaidam indiquent qu'une subduction continentale s'est développée au Paléozoı̈que inférieur, probablement en relation avec la collision des cratons Sino-Koréen et du Yangze.

Coesite

Omphacite

Peridotite

10.1016/s1251-8050(01)01718-9

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Citations (91)

Iron and magnesium isotope fractionation in oceanic lithosphere and sub-arc mantle: Perspectives from ophiolites

Earth and Planetary Science Letters (2015)

Ben‐Xun Su Fang‐Zhen Teng Yan Hu Rendeng Shi Mei‐Fu Zhou

Peridotite

Adakite

Metasomatism

10.1016/j.epsl.2015.08.020

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Citations (83)

Petrology, geochemistry and isotopic ages of eclogites from the Dulan UHPM Terrane, the North Qaidam, NW China

Lithos (2003)

Shuguang Song Jingsui Yang J. G. Liou Cailai Wu Rendeng Shi

Protolith

Massif

10.1016/s0024-4937(03)00099-9

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Citations (170)

The mineral chemistry of pyroxenite xenoliths in the volcanic rocks of Hoh Xil and their significance

Science in China Series D Earth Sciences (2001)

Cailai Wu Jingsui Yang Zhiqin Xu Haibing Li Rendeng Shi

Xenolith

10.1007/bf02911980

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Citations (2)

Dur’ngoi ophiolite in East Kunlun, Northeast Tibetan plateau: Evidence for paleo-Tethyan suture in Northwest China

Journal of Earth Science (2009)

Jingsui Yang Rendeng Shi Cailai Wu Xibin Wang Paul T. Robinson

Peridotite

Ultramafic rock

Anorthosite

10.1007/s12583-009-0027-y

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Citations (98)

Discovery of metamorphic diamonds in central China: an indication of a > 4000‐km‐long zone of deep subduction resulting from multiple continental collisions

Terra Nova (2003)

Jingsui Yang Zhiqin Xu L. Dobrzhinetskaya Harry W. Green Xianzhi Pei

Abstract The Central Orogenic Belt (COB) of China is a major continental collision zone that contains extensive outcrops of deeply subducted and exhumed rocks at both the eastern and the western end of the belt. Here we report discovery of microdiamonds from both eclogites and felsic gneisses in the North Qinling zone in the central portion of the COB. This discovery demonstrates that the country rocks of continental affinity shared in the ultra‐high‐pressure metamorphic (UHPM) event and provides a bridge connecting the two previously recognized UHPM terranes, thereby establishing the existence of a UHPM belt extending more than 4000 km. Geochronological dating yields Early Palaeozoic ages in the west and Early Mesozoic ages in the east, recording two separate continental collisions overprinted within the COB. Occurrence of UHP metamorphism during recurrent continental collision here and in the Alps suggests that deep subduction of continental material during such collisions is probably common rather than exceptional, with significant implications for processes of plate tectonic reorganization and mantle mixing over time.

continental collision

Eclogitization

10.1046/j.1365-3121.2003.00511.x

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Citations (186)

Zircon U-Pb SHRIMP dating of the Yematan batholith in Dulan, North Qaidam, NW China

Chinese Science Bulletin (2004)

Cailai Wu Jingsui Yang Joseph L. Wooden Rendeng Shi Songyong Chen

Batholith

10.1007/bf03184308

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Citations (56)

Diffusion-induced lithium isotopic heterogeneity in olivines from peridotites of an oceanized mantle lithosphere at the Yunzhug ophiolite (central Tibet)

Scientific Reports (2024)

Rendeng Shi Guang-Hao Cui Qi‐Shuai Huang Xiaoxiao Huang Haibo Zou

Abstract This paper reports lithium concentrations and isotopic compositions of olivines in the oceanized subcontinental lithospheric mantle (SCLM) peridotites of the Tibetan Yunzhug ophiolite. The results show systematic Li isotope changes with distance from the rim of olivine grains. δ 7 Li values of olivine in dunites decrease from + 10.46 to + 1.33‰ with increasing distance to olivine rim from 26.15 to 124.71 μm. A negative correlation of δ 7 Li and Li content in olivine from dunite and harzburgite indicates recent diffusive ingress of Li into the peridotites. The extremely heavy Li isotopic composition requires the seawater or seawater alteration endmember in the mixing model, and reveals Li diffusion from seawater into olivine. As in dunites, olivines in a harzburgite sample show similar variations in δ 7 Li as a function of distance from the grain rim (e.g., 6.01 to 1.73 in sample 14YZ13). We suggest that the behavior of Li in the oceanized SCLM peridotites may be controlled by Li diffusion from seawater, as Li activity in the liquid state is higher than the solid state in transporting Li through the olivines in the peridotites. This study supports that seawater Li diffusion is one of the important factors for the heterogeneity of mantle Li isotopes in ophiolites.

Peridotite

10.1038/s41598-024-54616-6

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Citations (2)

A syn-collisional model for Early Cretaceous magmatism in the northern and central Lhasa subterranes

Gondwana Research (2015)

Sheng‐Sheng Chen Rendeng Shi Xiaohan Gong Deliang Liu Qi‐Shuai Huang

continental collision

Terrigenous sediment

10.1016/j.gr.2015.04.008

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Citations (68)