Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China

查看全文 作　　者：FAN [1]JunXuan;Michael J [2]MELCHIN;CHEN [1]Xu;WANG [1]Yi;ZHANG [1]YuanDong;CHEN [1]Qing;CHI [1,3]ZhaoLi;CHEN [1]Feng

机构地区：[1]State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;[2]Department of Earth Sciences, St. Francis Xavier University, Antigonish, Nova Scotia B2G 2W5, Canada;[3]Algeria Branch of International Oil and Development Company, SINOPEK, Dongying 257000, China

出　　处：《Science China Earth Sciences》索引2011年第54卷第12期,共10页

基　　金：supported by Chinese Academy of Sciences (Grant No. KZCX2-EW-111);National Natural Science Foundation of China (Grant Nos. 40839910 and 40772002);Natural Sciences and Engineering Research Council of Canada (MJM) 摘　　要：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. 关键词：黑色页岩中国南方地层学志留系地理海平面变化生物带空间分布

相关文献

参考文献（34）
引证文献（33）
耦合文献（96）

参考文献(34)

引证文献(33)

耦合文献(96)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China

参考文献(34)

引证文献(33)

耦合文献(96)

用户提示