Showing 321 - 340 results of 1,366 for search '"Ordovician"', query time: 0.18s Refine Results
  1. 321

    Geochemical characteristics and organic matter accumulation of Late Ordovician shale in the Upper Yangtze Platform, South China by Zhaodong Xi, Shuheng Tang

    Published 2021-11-01
    “…The Ordovician shale (Wufeng Formation) in the Upper Yangtze Platform is now considered a successful development interval, independent of the Longmaxi Formation. …”
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  2. 322

    Mechanisms of shale gas generation and accumulation in the Ordovician Wufeng-Longmaxi Formation, Sichuan Basin, SW China by Tenger BORJIGIN, Baojian SHEN, Lingjie YU, Yunfeng YANG, Wentao ZHANG, Cheng TAO, Binbin XI, Qingzhen ZHANG, Fang BAO, Jianzhong QIN

    Published 2017-02-01
    “…The source rock quality, organic pore structure, occurrence state and sealing mechanisms of shale gas in the Ordovician Wufeng – SilurianLongmaxi Formation (O3w-S1l), Fuling region, Sichuan Basin were studied using a series of techniques including ultra-microscopic organic maceral identification, FIB-SEM, high temperature/pressure isothermal adsorption and isotopic age dating of noble gas. …”
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  3. 323

    Ordovician carbonate rock matrix fractured-porous reservoirs in Tahe Oilfield, Tarim Basin, NW China by Cui MAO, Jianhua ZHONG, Yong LI, Youzhi WANG, Yongbin NIU, Liangtian NI, Zhufu SHAO

    Published 2014-12-01
    “…Thick and widespread in the Lower-Middle Ordovician Yijianfang and Yingshan Formations, sand-clastic masses in the porphyritic limestone are rich in oil, quite a proportion of oil and gas produced currently is from their matrix rather than completely from the fracture cave system in the past understanding. …”
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  4. 324

    Ordovician climate changes in the northern subtropics: The δ18O record from the Tunguska Basin, Siberia by Peep Männik, Oliver Lehnert, Michael M. Joachimski

    Published 2023-06-01
    “…Oxygen isotopes from bioapatite (conodonts) have been used for several decades to reconstruct the Palaeozoic climate history. During the Ordovician, conodont-based δ18Ophos studies have revealed a general cooling trend throughout the system. …”
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    LATE ORDOVICIAN BRACHIOPOD <em> RONGATRYPA XICHUANENSIS </em> FROM XICHUAN, HENAN PROVINCE, CENTRAL CHINA by YU-CHEN ZHANG, REN-BIN ZHAN, COLIN D. SPROAT, BING HUANG

    Published 2019-09-01
    “…Here, we reassign a species to the genus, Rongatrypa xichuanensis (Xu, 1996), from the Shiyanhe Formation (Katian, Upper Ordovician) of Xichuan, Henan Province, central China. …”
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    Origin and characteristics of grain dolomite of Ordovician Ma55 Member in the northwest of Ordos Basin, NW China by Xi ZHANG, Tingshan ZHANG, Bianjun LEI, Jingxuan ZHANG, Ji ZHANG, Zhongjun ZHAO, Jinjie YONG

    Published 2019-12-01
    “…The origin of grain dolomite in M55 Member of Ordovician Majiagou Formation in northwestern Ordos Basin was studied by geochemical and petrological tests on core samples. …”
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    Early land plant remains from the uppermost Ordovician–?lowermost Silurian Cedarberg Formation of South Africa by Charles H. Wellman, Cameron R. Penn-Clarke, Claire Browning

    Published 2023-06-01
    “…The Cape Supergroup forms a regionally extensive and extremely thick Ordovician to Carboniferous succession of sedimentary rocks in southwestern South Africa. …”
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