| Citation: | Anwei Fei, Zhongtao Zhang. Middle Ordovician Bioturbation Structures from Southeastern Margin of Ordos Basin and Their Environmentary Interpretation. Journal of Earth Science, 2002, 13(4): 321-329.
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Trace fossils were discovered in the Middle Ordovician Badou Member of Fengfeng Formation and the Member 1 of Jinsushan Formation in Mt. Jinsu of the Fuping region which lies at the southeastern margin of the Ordos basin. The rocks of the fore-mentioned parts contain a considerable amount of bioturbation structures, in which ichnogenus and ichnospecies can not be identified, and abundant stromatolites.The distributions and characteristics of the bioturbation structures are analyzed and summarized in this paper. The paleoenvironments of related formations and members were interpreted in the method of semiquantitative analysis of bioturbation structures with researches on stromatolites and sedimentology. It is suggested that Fuping zone, located in the southeastern margin of the Ordos basin, was a carbonate platform where stromatolite-developing tidal flat and low-energy subtidal open platform environments dominated. Also that this zone experienced three paleogeographic evolutions from tidal flat to low-energy subtidal open platform environments, that is, three larger-scale eustatisms occurred during the sedimentary period of Middle Ordovician Badou Member of Fengfeng Formation to the Member 1 of Jinsushan Formation.
| An T X, Zhang A T, Xu J M, 1985. Ordovician Conodonts from Yaoxian and Fuping, Shaanxi and Their Stratigraphic Significance. Acta Geologica Sinica, 59(2): 97-108 doi: 10.1111/j.1525-1314.1985.tb00331.x |
| An T X, Zheng Z C, 1990. The Conodonts of the Marginal Areas around the Ordos Basin, North China. Beijing: Science Press. 81-89 |
| Bottjer D J, Droser M L, 1991. Ichofabric and Basin Analysis. Palaios, 6: 199-205 doi: 10.2307/3514901 |
| Bromley R G, 2000. Trace Fossils: Biology, Taphonomy and Applications. Translated by Zhang J P, Jin X C, Yang X N. Beijing: Petroleum Industry Press. 81-213 |
| Cao R J, 1984. Fossil Algal Communities within Stromatolites and Algal Mats from the Precambrian Wumishan Formation in Beijing. Acta Micropalaeontologica Sinica, 1(2): 193-202 http://en.cnki.com.cn/Article_en/CJFDTOTAL-WSGT198402008.htm |
| Du R L, 1992. Palaeontology and Geochronic Geology in the Precambrian. Beijing: Geological Publishing House. 26-40 |
| Jia Z Y, 1988. Fundamental Characters of a Carbonate Palaeoslope. Oil & Gas Geology, 9(2): 171-177 http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYYT198802009.htm |
| Li R H, 1992. Neurodictyon: A New Network Ichnogenus. Geoscience, 6(2): 183-188 http://en.cnki.com.cn/Article_en/CJFDTOTAL-XDDZ199202008.htm |
| Li R H, 1993. Trace Fossils from Middle-Ordovician Jinsushan Formation, Fuping, Shaanxi and Their Depositional Environments. Acta Sedimentologica Sinica, 11(2): 27-33 http://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB199302003.htm |
| Martin A J, 1993. Semiquantitative and Statistical Analysis of Bioturbate Textures, Sequatchie Formation(Upper Ordovician), Georgia and Tennessee, USA. Ichnos, 2(2): 117-136 doi: 10.1080/10420949309380082 |
| Mei Z C, Lu H Y, Li W H, 1992. Bedded Radiolarian Cherts in the Ordovician of Weibei, Shaanxi. Acta Sedimentologica Sinica, 10(2): 38-47 http://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB199202001.htm |
| Mei Z C, Li W H, 1986. Depositional Model of Deep Water Carbonate Gravity Flows in the Middle-Upper Ordovician Series in Fuping, Shaanxi Province. Acta Sedimentologica Sinica, 4(1): 34-43 http://en.cnki.com.cn/article_en/cjfdtotal-cjxb198601004.htm |
| Taylor A M, Goldring R, 1993. Description and Analysis of Bioturbation and Ichnofabric. Journal of the Geological Society, London, 150: 141-148 doi: 10.1144/gsjgs.150.1.0141 |
| Yang S P, 1986. Turbidite Flysch Trace and Fossils from China and Their Palaeoecology and Palaeoenvironments. In: Palaeontological Society of China, ed. Selected Papers from the 13th and 14th Annual Conventions of Palaeontological Society of China. Hefei: Anhui Science and Technology Publishing House. 143-166 |
| Zhang Y, 1989. Evolutions of Life and Fossil Records in the Precambrian. Beijing: Peking University Press. 108-156 |
| Zhu S X, 1993. Stromatolites in China. Tianjin: Tianjin University Press. 24-214 |
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