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An early aged ophiolite in the Western Kunlun Mountain, northwestern Tibet plateau and its tectonic implications

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An early aged ophiolite in the Western Kunlun Mountain, nort...

Distribution of the Permian Monodiexodina in Karakorum and Kunlun and its geological Significance

2004年全国岩石学与地球动力学研讨会

作者： xuchang xiao jun wang wenhua ji li su 1. institute of geology, {1. academy of {3. Sciences (CAGS) 2. Regional {3. surveying Party of Shanxi Provence 3. Xi''An institute of geology and Mineral Resources

＜正＞ The early aged ophiolites have attracted the studying from many geologists in recent decades （Colombo C. G. et al, 2001. Scarrow J. H. et al., Timothy M. Kusky et al., 2001.....）, because the early aged ophiolites can provide the information about the ancient oceanic processes relevant to the evolution of the plate tectonics in the early period of the earth, and also concem such problems as whether there existed a "Protero-Tethys" and the break-up and convergence of the Rodinia supercontinent in the NW Tibet plateau. This paper reveals a definite complete ophiolite, the "Kudi- ophiolite" of late-Proterozoic-early Paleozoic, in the Westem Kunlun Mtns, NW. Tibet plateau, and reports the recent isotopic ages of 51.±4Ma. And 502±1.Ma （U-Pb ratio in zircon） for the middle and upper portions of the mafic cumulates of the Kudi-ophiolite, operated at the most powerful dating tool, the SHRIMP-Ⅱ. The geochemical and geochronological data integrating with the geological setting suggest that the Kudi-ophiolite might have formed in an Archipelago not in a vast oceanic basin, the so-called Protero-Tethys, and was tectonically emplaced during the early Paleozoic in the NW. Tibet plateau.

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Acta Geologica Sinica(English Edition) 2009年第2期83卷 229-237页

作者： YAO jianxin {1. Naiwen xiao {3. ji Zhansheng WU Guichun WU Zhenjie li Boqin {1. jun {1. Yong ZHAI Qingguo institute of {1. Chinese Academy of Geological Sciences Beijing 100037 China Chang＇an University Xi＇an Shaanxi 712000 China

The Permian fusu{1.noidean genus Monodiexodina is widely distributed in east Tethys. The genus might be an important indicator for the northern margin of Gondwana in northwestern China, but this is disputed. Monodiexodina-bearing areas can be restored as in either northern or southern middle latitudes with a symmetrical distribution between a high latitudinal, cool/cold water c{1.matic realm and a paleotropical, warm water realm. Permian strata bearing Monodiexodina in Karakorum, Muztag Pear, and Buka Daban Pear of the east Kunlun Mountains can be correlated with each other. Faunal analyses and the stratigraphical position of Monodiexodina-bearing strata indicate that both Karakorum, east Kunlun, and the Pamirs were formed in a cool temperate sea area of the northern hemisphere in middle latitudes during the Permian, rather than at the Gondwana margin.

关键词： Monodiexodina middle latitude symmetric distribution cool temperate sea area,Karakorum east Kunlun northern hemisphere

Petrological, geochemical and chronological constraints for the tectonic setting of the Dongco ophiolite in Tibet

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Science China Earth Sciences 2007年第5期50卷 660-671页

作者： BAO PeiSheng xiao {1. su {3. wang jun institute of {1. Chinese Academy of Geological SciencesBeijing 100037China Experimental Center China University of GeologyBeijing 100029China

The Dongco ophiolite occurred in the middle-western segment of the Bangong-Nu{1.ang suture zone. The thickness of the ophiolite suite is more than 5 km, which is composed, from bottom to top, of the mantle peridotite, mafic-ultramafic cumulates, basic sills (dykes) and basic lava and tectoni- cally emplaced in Jurassic strata (Mugagongru Group). The Dongco cumulates consist of dunite- troctolite-olivine-gabbro, being a part of DTG series of mafic-ultramafic cumulates. The basic lavas are characterized by being rich in alkali (Na2O+ K2O), TiO2, P2O5 and a LREE-rich type pattern dip- ping right with [La/Yb]=6.94―1..6 as well as a trace elements spider-diagram with normal anomaly of Th, Nb, Ta, Hf. Therefore, the Dongco basic lavas belong to ocean-island basalt (OIB) and dis- tinctly differ from mid-ocean ridge basalt (MORB) and island-arc basalt (IAB) formed in the plate convergence margin. The basic lavas have higher 87Sr/86Sr (0.7043.3.0.705007), lower 1.3.d/1.4Nd (0.51.708―0.51.887) and εNd(t ) from +2.7―+5.8, indicating that they derive from a two-components mixing mantle source of depleted mantle (DM) and enriched mantle (EMI). From above it is ready to see that the Dongco ophiolite forms in oceanic island (OIB) where the mantle source is replaced by a large amount of enriched material, therefore it distinctly differs from these ophiolites formed in island-arc and mid-oecan ridge. Newly obtained SHRIMP U-Pb dating for zircon of the cumulate troctolite is 1.2 ± 3.Ma and whole-rock dating of ^(3.)Ar/^(40)Ar for the basalt is 1.3.4 ± 2.7 Ma and 1.0.9 ± 2.8 Ma, indicating that the Dongco ophiolite formed at Early Cretaceous and the middle-western segment of the Bangong-Nu{1.ang oceanic basin was still in the developing and evolving period at Early Cretaceous.

关键词： Dongco ophiolite geochemistry SHRIMP U-Pb dating for zircon whole-rock dating of 3.Ar/40Ar Bangong-Nujiang {1.ture zone

sub-percent precision measurement of neutrino oscillation parameters with junO

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chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao jun Cao Rossella Caruso Cédric Cerna Chi Chan jinfan Chang Yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen Yu Chen Zhiyuan Chen Zikang Chen jie Cheng Yaping Cheng Yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko jianmeng Dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Donghua Fan Lei Fan jian Fang Wenxing Fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei li-Cheng Feng Qichun Feng Richard Ford Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan Nunzio Guardone Cong Guo jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He Wei He Tobias Heinz Patrick Hellmuth Yuekun Heng Rafael Herrera YuenKeung Ho Yerevan Physics institute YerevanArmenia Universiélibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing {1. of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina China institute of Atomic Energy BeijingChina institute of High Energy Physics BeijingChina North China Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of chinese {1. of Sciences BeijingChina ji{1.n University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina jinan University GuangzhouChina sun Yat-Sen University GuangzhouChina Harbin institute of Technology HarbinChina University of Science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South China HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing University NanjingChina Guangxi University NanningChina East China University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee {1. Shanghai Jiao Tong UniversityShanghaiChina institute of Hydro{1. and Environmental {1. Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

junO is a multi-purpose neutrino observatory under construction in the south of *** pub{1.cation presents new sensitivity estimates for the measurement of the △m_(3.1}^(2),△m_(21.^(2),sin^(2)θ_(1.),and sin^(2)θ_(1.) oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satel{1.te *** is found that the △m_(21.^(2) and sin^(2)θ_(1.) oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(3.1}^(2) parameter will be determined to about 0.2%precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement junO