Sedimentary characteristics and lithofacies palaeogeography of the Late Sinian and Early Cambrian in middle Yangtze region
Li Zhongxiong Lu Yongchao Wang Jian Duan Taizhong Gao Yonghua
1 Faculty of Earth Resources,China University of Geosciences,Wuhan 430074，Hubei
2 Chengdu Institute of Geology and Mineral Resources, Chengdu 610082,Sichuan
3 Marathon Oil Company,Houston,TX 77056-2725
4 Chinese Academy of Geological Sciences,Beijing 100037
The middle Yangtze region in this paper refers to the most part of Hubei and Hunan Provinces bounded on the north by the QingfengXiangguang Fracture, on the west by western border of Hubei Province, and on the south by HunanGuizhouGuangxi deep sea basin Based on field investigation, the sedimentary characteristics, horizontal correlation and facies distribution of Upper Sinian and Lower Cambrian for more than ten sections in the middle Yangtze region are comprehensively studied in this paper Six lithofacies palaeogeographic maps of Doushantuo, Dengying, Qiongzhusi, Canglangpu, and Longwangmiao Ages of Late Sinian and Early Cambrian have been made in the light of dominant facies and in the way to make stratigraphic map On the basis of lithofacies palaeogeographic map, the sedimentary and lithofacies palaeogeographic characteristics of the middle Yangtze region during the Late Sinian and Early Cambrian are also described There are four principal palaeogeographic units in the Late Sinian in the middle Yangtze region, ie carbonate tidal flat, open carbonate platform，platformmargin slopes and a basin in the south The major lithofacies palaeogeographic characteristics of the Qiongzhusi Age and early Canglangpu Age (Early Cambrian) are a land in middle Hubei, the carbonate tidal flat surrounding the land , shelf and a basin in the south The land disappeared during the Late Canglangpu Age and Longwangmiao Age (Early Cambrian) and the framework of palaeogeography consisted of tidal flat,open carbonate platform , platformmargin slopes and basin in the south
About author: Li Zhongxiong,born in 1964, was graduated from Chengdu University of Technology and got his Master degree in 1987 Now he is an associate research fellow in Chengdu Institute of Geology and Mineral Resources and a candidate for PhD degree in University of Geosciences (Wuhan, Hubei), and is engaged in sedimentology, paleontological stratigraphy and regional geologyEmail:cdlzhongxiong@cgs.gov.cn
Cite this article:
. Sedimentary characteristics and lithofacies palaeogeography of the Late Sinian and Early Cambrian in middle Yangtze region[J]. JOURNAL OF PALAEOGEOGRAPHY, 2004, 6(2): 151-162.
. Sedimentary characteristics and lithofacies palaeogeography of the Late Sinian and Early Cambrian in middle Yangtze region[J]. JOPC, 2004, 6(2): 151-162.
