biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina
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:332004/25097 2023-05-15T16:41:08+02:00 biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina Fan Junxuan Melchin Michael J Chen Xu Wang Yi Zhang Yuandong Chen Qing Chi Zhaoli Chen Feng 2011-01-01 http://ir.nigpas.ac.cn/handle/332004/25097 英语 eng sciencechinaearthsciences http://ir.nigpas.ac.cn/handle/332004/25097 期刊论文 2011 ftchinacscnigpas 2019-12-27T01:05:29Z 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 |
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Open Polar |
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Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
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 |
spellingShingle |
Fan Junxuan Melchin Michael J Chen Xu Wang Yi Zhang Yuandong Chen Qing Chi Zhaoli Chen Feng biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
author_facet |
Fan Junxuan Melchin Michael J Chen Xu Wang Yi Zhang Yuandong Chen Qing Chi Zhaoli Chen Feng |
author_sort |
Fan Junxuan |
title |
biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
title_short |
biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
title_full |
biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
title_fullStr |
biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
title_full_unstemmed |
biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
title_sort |
biostratigraphyandgeographyoftheordoviciansilurianlungmachiblackshalesinsouthchina |
publishDate |
2011 |
url |
http://ir.nigpas.ac.cn/handle/332004/25097 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Ice Sheet South pole |
genre_facet |
Ice Sheet South pole |
op_relation |
sciencechinaearthsciences http://ir.nigpas.ac.cn/handle/332004/25097 |
_version_ |
1766031567023505408 |