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Depositional model of Permian Luodianian volcanic island and its impact on the distribution of fusulinid assemblage in southern Qinghai,Northwest China

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Science China Earth Sciences 2008年第4期51卷 594-607页

作者： NIU ZhiJun XU AnWu WANG JianXiong DUAN QiFa ZHAO XiaoMing YAO HuaZhou Yichang Institute of Geology and Mineral Resources China Geological SurveyYichang 443003China

Pan-riftizational tectonic activity reached climax at Luodianian (Permian) in the East Tethyan Domain, Qinghai-Tibet Plateau. Because of eruptive volcanics and influence of terrigenous materials, a complex volcanic-sedimentary landform formed on the sea floor in southern Qinghai. Four sedimentary facies types were recognized based on detailed field mapping. Spatially, platform facies volcanic-limestone type was located at the center belt approximately trending NWW, surrounded by shallow water slope facies tuff/tuffite type at the two flanks and deep water slope facies breccia/calcirudite at the most outside. The depression facies sandstone-mudstone type, which comprised mainly mudstone, de-posited between volcanic islands (platform facies volcanic-limestone type). Based on the field map-ping and stratigraphic section data, seven rift-related sedimentary facies were recognized and a depo-sitional model for volcanic island was proposed. It is revealed that some volcanic island chain formed quickly and intermittently in the Qamdo Block during violent eruption, and small carbonate reef, shoal, platform occurred above or on edge of volcanic island, and some slope sedimentary facies surrounded volcano island chain during dormant period of volcanic activities. Three types of fusulinid assemblages were distinguished in the carbonate rocks, which deposited in varied positions of a palaeo-volcanic island: (1) Misellina-Schwagerina assemblage occurred above or on edge of volcanic island, (2) Para-fusulina assemblage was located at restricted depression facies among volcanic islands or carbonate platform, and (3) the reworked Pseudofusulina-Schwagerina assemblage occurred at slope facies near margin of volcanic island, which originally deposited in the shallow-water carbonate platform, then collapsed along the volcanic island margin with fusulinid-bearing grain-supported carbonate con-glomerate or calcirudite, and finally re-deposited on the deeper slope. The sedimentary sequen

关键词： volcanic rocks sedimentary facies depositional model fusulinid Permian Qinghai

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Ultrastructures in the Spirotheca of Fusulinella (fusulinid foraminifer)

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Science China Chemistry 1993年第6期36卷 751-758页

作者：杨湘宁郑洪 Dept. of Earth Sciences Nanjing University Nanjing 210008 PRC China University of Geosciences Beijing 100083 PRC

An SEM study has been conducted to examine the ultrastructures in the spirotheca of Fusulinella and to reveal the ultra-features of the basic layers consisting of the spirotheca of Fusulinella. The study has demonstra... 详细信息

关键词： fusulinid foraminifers ultrastructure of test wall.

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Ni-Ir anomaly and fusulinid extinction across the Permian-Triassic boundary in Dongluo, Guangxi

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Chinese Science Bulletin 1997年第13期42卷 1117-1119页

作者： Wang, XP Hao, WC Yang, SR Department of Geology Peking University Beijing 100871 China

SINCE Alvarez first used iridium anomaly to explain the Cretaceous-Tertiary impact eventand mass extinction, more than 70 sites of iridium-nickel anomalies have been found. The Per-mian-Triassic boundary extinction is more prominent than that of the *** leads us to make research on whether similar events happened during that period.

关键词： Permian-Triassic boundary anomalous elements fusulinid extinction.

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Ultrastructure in the Septula of Neoschwagerina(fusulinid Foraminifer)

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Chinese Science Bulletin 1993年第8期38卷 661-664页

作者：杨湘宁郑洪 Department of Earth Sciences Nanjing University China University of Geosciences

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LATE CARBONIFEROUS fusulinid BIOSTRATIGRAPHICAL SEQUENCE IN STRATIGRAPHICAL REGION OF NORTH CHINA

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Chinese Science Bulletin 1988年第15期33卷 1290-1294页

作者：张志存 Yichang Institute of Geology and Mineral Resources MGMR

Based upon the research materials from Shanxi, Hebei, Henan, Jiangsu, Shan- dong, Anhui and Shaanxi provinces, the Late Carboniferous fusulinid biostrati- graphical sequence in stratigraphical region of North China ca... 详细信息

关键词： North China Late Carboniferous fusulinid biozone

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A Potential Global Standard Stratotype-Section and Point of the Moscovian Stage(Carboniferous)

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 366-372页

作者： WANG Xiangdong QI Yuping Lance LAMBERT WANG Zhihao WANG Yue HU Keyi LIN Wei CHEN Bo State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontologythe Chinese Academy of Sciences Nanjing Jiangsu 210008 China Department of Geological Sciences University of Texas at San Antonio San Antonio Texas 78249-0663 USA

Conodonts and fusulinids are the two most widely used biotic groups for subdividing and correlating Bashkirian and Moscovian strata. The definition of the base of the Global Moscovian Stage is undecided because there are many disagreements among existing boundary definition proposals,each of which has disadvantages. Declinognathodus donetzianus is easily recognized but somewhat limited in its paleogeographic distribution. Idiognathoides postsulcatus is slightly more widespread, but it is less easily identified and its occurrences may be diachronous from region to region. Diplognathodus ellesmerensis is easily recognized and even more widespread, but it is usually rare and its ancestry is not adequately known. The Naqing Section of South Guizhou, South China contains diverse conodont evolutionary lineages among different taxa, including Idiognathoides, Idiognathodus, Diplognathodus,Neognathodus, Gondolella and Mesogondolella. There are numerous transitional forms in almost every lineage of the Naqing section, which shows that the prospects for South China to play a critical role in determining the basal Moscovian Stage definition are good.

关键词： Bashkirian-Moscovian Boundary Global Standard Stratotype-Section and Point conodont fusulinid the Naqing Section of South Guizhou China

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新疆阿尔金山拉配泉地区石炭纪含地层

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地层学杂志 1999年第1期23卷 10-15页

作者：周铁明滇黔桂石油地质科学研究所

新疆阿尔金山拉配泉地区石炭系上统下部，被命名为苦水河组，岩性为灰岩、砂岩、泥页岩夹少量硅质岩，含丰富的、非有孔虫、珊瑚、腕足类、海百合茎及钙藻化石。详尽地研究类化石后，可分为３个带：３）Ｐｒｏｆｕｓｕｌｉｎｅ... 详细信息

新疆阿尔金山拉配泉地区石炭系上统下部，被命名为苦水河组，岩性为灰岩、砂岩、泥页岩夹少量硅质岩，含丰富的、非有孔虫、珊瑚、腕足类、海百合茎及钙藻化石。详尽地研究类化石后，可分为３个带：３）Ｐｒｏｆｕｓｕｌｉｎｅｌａｐｓｅｕｄｏｒｈｏｍｂｏｉｄｅｓ－Ｐｒｏｆｕｓｕｌｉｎｅｌａｐａｒａｒｈｏｍｂｏｉｄｅｓ带；２）Ｐｒｏｆｕｓｕｌｉｎｅｌａｐｒｉｓｃａ－Ｐｒｏｆｕｓｕｌｉｎｅｌａｏｖａｔａ带；１）Ｅｏｓｔａｆｆｅｌａｐｏｓｔｍｏｓｑｕｅｎｓｉｓ－Ｐｓｅｕ－ｄｏｓｔａｆｆｅｌａａｎｔｉｑｕｅｖａｒ．ｐｏｓｔｅｒｉｏｒ带。苦水河组可与新疆塔里木盆地西南缘的卡拉乌依组对比。

关键词：新疆阿尔金山石炭系 Ting类生物带 fusulinid

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