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《GEOLOGICAL JOURNAL OF UNIVERSITIESF》 1995-02
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GEOCHEMICAL VARIATION ACROSS CAMBRIANORDOVICIAN BOUNDARY IN THE HULE SECTION,ANHUI PROVINCE

Fang Yiting; Shen Weizhou; Ni Qisheng; Liu Yan; Lin Yuping(Department of Earth Sciences, Nanjing University, Naming 210093)  
The Cambrian-Ordovician booundary section in Hule is one of the well-established section of this stratigraphic sequence. Fossils from bed 5 to bed 12 are dominated by the grapto-lites. Two graptolite zones were recognized. They are the Staurograptus zone in the lower and the An;fsograptus-Clonograptrs zone in t he uppe r. No fossi graptolites have been found from bed l to bed 4 except of trilobite Charchaqia ? sp. Accordingly, the Cambrian-Ordovician boundary is placed on the base of Bed 5. However, only minor negative excursion of 813C displays across the Cambrian-Ordovician boundary though the trilobites dominated shelly fauna was replaced by the graptolites dominated pelagic fauna around this level. Dramatic changes in value of δ13C, δ18 O and REE appear across the boundary between two lithostratigraphic units, i. e. the Tangjiaqiao and the Xiyangshan Formations. These conspicuous geochemical changes are likely coincident with shifting from anoxic to oxide environments following rapid falling of sea-level.
【Fund】: 国家自然科学基金
【CateGory Index】: P534
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【References】
Chinese Journal Full-text Database 2 Hits
1 Shen Wei-zhou Fang Yi-ting Ni Qi-sheng Liu Yan (Department of Earth Sciences,Nanjing University,Nanjing,210093);Geochemical characteristics across the Cambrian-Ordovician boundary at Tangshan,Nanjing[J];Journal of Stratigraphy;1996-03
2 GONG Wei-li~ 1) ,BI Zhi-guo~ 2) ,JIANG Li-fu~ 3) and QI Dun-lun~ 2) 1) Anhui Paleontological Museum,Hefei 230001; 2) No 327 Geological Party of Anhui Province,Hefei 230001; 3) Anhui Institute of Geological Survey,Hefei 230001;PRELIMINARY STUDY OF THE ORDOVICIAN SEQUENCE STRATIGRAPHY IN THE HULE AREA OF NINGGUO,ANHUI[J];Journal of Stratigraphy;2010-03
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 Chen Rongkun(China University of Geosciences, Beijing);Application of Stable Oxygen and Carbon Isotope in the Research of Carbonate Disgenetic Environment[J];ACTA SEDIMENTOLOGICA SINICA;1994-04
2 Chen Xu and Qiu Jing-yu;Ordovician palaeoenvironmental reconstruction of Yichang area, W. Hubei[J];Journal of Stratigraphy;1986-01
3 Fang Yi-ting Feng Hong-zhen and Yu Jian-hua;The Hulo Formation of the Hulo area,Ningguo Anhui[J];Journal of Stratigraphy;1989-04
4 ZHANG Sen-gui,ZHANG Yun-bai and YAN Hui-jun Editorial Office of Journal of Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Scieoces,Nanjing 210008;A BRIEF INTRODUCTION TO THE "INTERNATIONAL STRATIGRAPHIC CHART"(2008)[J];Journal of Stratigraphy;2009-01
5 Gao Changlin(Central Laboratory of Petroleum Geology, Ministry of Geology and Mineral Resources, Wuxi, 214001);REE GEOCHEMICAL CHARACTERISTICS OF CARBONATE ROCKS IN SOUTHERN QINLING, SHAANXI PROVINCE AND THEIR PALEO-OCEANOLOGIC SIGNIFICANCE[J];Geochimica;1992-04
6 Mu Enzhi(Nanjing Institute of Geology and Palaeontology, Acndemia Sinica);PROF. XU JIE'S RESEARCH WORK ON GRAPTOLITHINA[J];;1986-01
7 Yan Kunyuan and Tang Yongcheng(Bureau of Geology and Mineral Resources of Anhui Province);PROF. XU JIE AND HIS STUDY OF ORDOVICIAN SYSTEM IN S. ANHUI[J];;1986-01
8 Yu Jianhua, Fang Yiting and Liu Huaibao;NEW ADVANCES IN THE ORDOVICIAN GRAP-TOLITE-BEARING STRATA FROM THE HULE AREA IN NINGGUO COUNTY,SOUTHERN ANHUI[J];;1986-01
9 Xu Hankui(Nanjing Institute of Geology and Paleontology, Academia Sinica);NEW RECOGNITION OF THE LUNSHAN LIMESTONE IN THE NANJING HILLS, SOUTHERN JIANGSU[J];Chinese Journal of Geology;1976-03
10 Y.WANG AND XU HAN-KUI (Institute of Geology and Palaeontology,Academia Sinica);SOME LOWER ORDOVICIAN BRACHIOPODS FROM TANGSHAN,NANJING(NANKING),JIANGSU[J];Acta Palaeontologica Sinica;1966-01
【Secondary References】
Chinese Journal Full-text Database 1 Hits
1 ZHANG Mao heng 1, ZHOU Chun lin 1, SHANG Xiao chun 2(1.Geographic College of Nanjing Normal University, Nanjing 210097, China; 2.Communication College of Southeast University, Nanjing 210008, China);The Formation and Evolving Process of Tangshan Ape-man Caves, Nanjing[J];Jiangsu Geology;2001-01
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