Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China
Based on the new material of seven Ordovician-Silurian boundary sections investigated recently, together with previously published data, we analyze the temporal and spatial distributions of the Lungmachi black shales, a key petroleum source bed widely distributed in South China. The Lungmachi black...
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/19890 2023-05-15T16:41:17+02:00 Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China Fan JunXuan Melchin, Michael J. Chen Xu Wang Yi Zhang YuanDong Chen Qing Chi ZhaoLi Chen Feng 2011-12-01 http://ir.nigpas.ac.cn/handle/332004/19890 https://doi.org/10.1007/s11430-011-4301-3 英语 eng SCIENCE PRESS SCIENCE CHINA-EARTH SCIENCES http://ir.nigpas.ac.cn/handle/332004/19890 doi:10.1007/s11430-011-4301-3 South China Ordovician-Silurian Lungmachi Formation graptolitic black shales petroleum source bed YANGTZE REGION GRAPTOLITE STRATOTYPE SYSTEM BASE Geology Geosciences Multidisciplinary 期刊论文 2011 ftchinacscnigpas https://doi.org/10.1007/s11430-011-4301-3 2019-08-14T12:44:29Z Based on the new material of seven Ordovician-Silurian boundary sections investigated recently, together with previously published data, we analyze the temporal and spatial distributions of the Lungmachi black shales, a key petroleum source bed widely distributed in South China. The Lungmachi black shales range in age from the Normalograptus persculptus Biozone of the uppermost Ordovician to the Spirograptus guerichi Biozone of the lower Telychian, and ten graptolite biozones can be recognized within this unit. The basal and upper contacts of the Lungmachi black shales are diachronous. The basal contact ranges from the N. persculptus to the C. cyphus biozones, a span of five graptolite biozones over two stages. The upper contact ranges from the D. pectinatus-M. argenteus Biozone to the Spirograptus guerichi Biozone, which spans four graptolite biozones over two stages. The Yichang Uplift resulted in the formation of the Hunan-Hubei Submarine High in the border area of Hubei, Hunan, and Chongqing. This is supported by a break in sedimentation in this area spanning all or part of the Hirnantian, and in many areas extending into the underlying Katian and overlying Rhuddanian. Comparison of the distribution of the Katian to Rhuddanian strata in this area indicates a growth and subsequent reduction in area of the Hunan-Hubei Submarine High particularly in the Hirnantian to early Rhuddanian. This may partly represent the influence of the process of formation and melting of ice sheet in Ordovician South Pole and consequent sea level change. Report Ice Sheet South pole Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) South Pole Science China Earth Sciences 54 12 1854 1863 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
South China Ordovician-Silurian Lungmachi Formation graptolitic black shales petroleum source bed YANGTZE REGION GRAPTOLITE STRATOTYPE SYSTEM BASE Geology Geosciences Multidisciplinary |
spellingShingle |
South China Ordovician-Silurian Lungmachi Formation graptolitic black shales petroleum source bed YANGTZE REGION GRAPTOLITE STRATOTYPE SYSTEM BASE Geology Geosciences Multidisciplinary Fan JunXuan Melchin, Michael J. Chen Xu Wang Yi Zhang YuanDong Chen Qing Chi ZhaoLi Chen Feng Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China |
topic_facet |
South China Ordovician-Silurian Lungmachi Formation graptolitic black shales petroleum source bed YANGTZE REGION GRAPTOLITE STRATOTYPE SYSTEM BASE Geology Geosciences Multidisciplinary |
description |
Based on the new material of seven Ordovician-Silurian boundary sections investigated recently, together with previously published data, we analyze the temporal and spatial distributions of the Lungmachi black shales, a key petroleum source bed widely distributed in South China. The Lungmachi black shales range in age from the Normalograptus persculptus Biozone of the uppermost Ordovician to the Spirograptus guerichi Biozone of the lower Telychian, and ten graptolite biozones can be recognized within this unit. The basal and upper contacts of the Lungmachi black shales are diachronous. The basal contact ranges from the N. persculptus to the C. cyphus biozones, a span of five graptolite biozones over two stages. The upper contact ranges from the D. pectinatus-M. argenteus Biozone to the Spirograptus guerichi Biozone, which spans four graptolite biozones over two stages. The Yichang Uplift resulted in the formation of the Hunan-Hubei Submarine High in the border area of Hubei, Hunan, and Chongqing. This is supported by a break in sedimentation in this area spanning all or part of the Hirnantian, and in many areas extending into the underlying Katian and overlying Rhuddanian. Comparison of the distribution of the Katian to Rhuddanian strata in this area indicates a growth and subsequent reduction in area of the Hunan-Hubei Submarine High particularly in the Hirnantian to early Rhuddanian. This may partly represent the influence of the process of formation and melting of ice sheet in Ordovician South Pole and consequent sea level change. |
format |
Report |
author |
Fan JunXuan Melchin, Michael J. Chen Xu Wang Yi Zhang YuanDong Chen Qing Chi ZhaoLi Chen Feng |
author_facet |
Fan JunXuan Melchin, Michael J. Chen Xu Wang Yi Zhang YuanDong Chen Qing Chi ZhaoLi Chen Feng |
author_sort |
Fan JunXuan |
title |
Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China |
title_short |
Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China |
title_full |
Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China |
title_fullStr |
Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China |
title_full_unstemmed |
Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China |
title_sort |
biostratigraphy and geography of the ordovician-silurian lungmachi black shales in south china |
publisher |
SCIENCE PRESS |
publishDate |
2011 |
url |
http://ir.nigpas.ac.cn/handle/332004/19890 https://doi.org/10.1007/s11430-011-4301-3 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Ice Sheet South pole |
genre_facet |
Ice Sheet South pole |
op_relation |
SCIENCE CHINA-EARTH SCIENCES http://ir.nigpas.ac.cn/handle/332004/19890 doi:10.1007/s11430-011-4301-3 |
op_doi |
https://doi.org/10.1007/s11430-011-4301-3 |
container_title |
Science China Earth Sciences |
container_volume |
54 |
container_issue |
12 |
container_start_page |
1854 |
op_container_end_page |
1863 |
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1766031714483699712 |