Characteristics of the sinian glaciogenic rocks of the Shennongjia region,Hubei Province,China |
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| Institution: | 1. School of Geography and Environmental Sciences, University of Ulster, Cromore Road, Coleraine, BT52 1SA, Northern Ireland, UK;2. Department of Geography, Durham University, Durham, DH1 3LE, UK;3. Natural Environment Research Council, Radiocarbon Facility, East Kilbride, Scotland, G75 OQF, UK;4. School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland;5. Department of Geography, University of Sheffield, Sheffield, S10 2TN, UK;1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu 610500, China;2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;3. Sinopec Exploration Company, Chengdu 610041, China;1. OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Borgo Grotta Gigante 42C, Trieste, 34010, Italy;2. Maynooth University Department of Geography, Maynooth, Co. Kildare, Ireland;3. British Geological Survey, Murchison House, West Mains Road, Edinburgh, Scotland, EH9 3LA, UK;4. Department of Geography, Durham University, Durham, DH1 3LE, UK;5. Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin, Ireland;6. Department of Geography, Trinity College Dublin, Ireland;1. Department of Earth Sciences, Durham University, Durham, DH1 3LE, UK;2. Department of Physics, Durham University, Durham, DH1 3LE, UK;3. WiscSIMS Lab, Department of Geoscience, University of Wisconsin, Madison, WI, 53706-1692, USA;1. Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK;2. British Geological Survey, Environmental Science Centre, Keyworth, Nottingham NG12 5GG, UK |
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| Abstract: | Sinian glaciogenic rocks are widespread in Shennongjia, Hubei. They are best preserved in western Shennongjia where the glacial Gucheng and Nantuo Formations are separated by the non-glacial Datanpo Formation, which is chiefly composed of carbonaceous silty shale and siltstone. In eastern Shennongjia most of the Lower Sinian succession is, however, absent and the Nantuo Formation rests with angular unconformity on the pre-Sinian basement.The glacial sedimentary facies mainly comprise three types; namely the lodgement facies, meltwater facies and proglacial subaqueous facies. The lodgement facies is predominant in the eastern area but outwash deposits are more abundant in the western area. Major glacial transport during the Nantuo Ice Age is inferred to have been from the ESE, based on pre-glacial palaeogeography, provenance of clasts and regional variations in glacial sedimentary facies.During the Nantuo Ice Age, the Jingshan Mountain, which is situated to the east of Shennongjia, was a glacial source area. Jianghan glacial erosion and deposition was in the form of an incomplete ring-shape; the Mufu Mountain area, which is situated at the juncture between southeastern Hubei and northwestern Jiangxi provinces, and was far removed from the source areas, received outwash deposits. |
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