Abstract The Tarim area in this paper refers to the present Tarim Basin and its surrounding mountains, bounded on the north by the Middle Tianshan Mountains, on the south by the Kunlun Mountains, on the west by boundary line of our country, and on the east by the Altun Mountains. It covers an area of more than 1 000 000 km2. Based on the quantitative and qualitative data from the study of stratigraphy and petrology of outcrops and well sections, according to the single factor analysis and multifactor comprehensive mapping method, the single factor maps of the Lower, Middle and Upper Cambrian, and the lithofacies paleogeography maps of the Early, Middle and Late Cambrian of Tarim area, are compiled. The most important character of these lithofacies paleogeography maps is quantification. Quantification means that the determination of each paleogeography unit is based on the accurate quantitative data and the quantitative single factor maps. It is the first time to apply this quantitative method in the Tarim area In the Barly Cambrian, the Tarim area was mainly a carbonate platform, in which there were penebanks, dolomitic flat, and gypsum halite lake. The South Tianshan Basin and East Tarim Basin were siliceous rock-limestone-mudstone basin. The Kunlun Plat form was situated in the south, in which there were two small lands The Altun Land was situated in the southeast In the Middle and Late Cambrian, similar to the lithofacies paleogeographic pattern of the Early Cambrian, the land area was gradually reduced, the basin area was enlarged, while the Tarim carbonate platform changed little . The transgression continued from the Early Cambrian to the Late Cambrian.
About author: Feng Zengzhao, born in 1926, graduated from Tsinghua University in 1952 Now he is a professor at China University of Petroleum (Beijing), and is engaged in sedimentology and paleogeography.
Cite this article:
Feng Zengzhao,Bao Zhidong,Wu Maobing et al. Lithofacies palaeogeography of the Cambrian in Tarim area[J]. JOPC, 2006, 8(4): 427-439.
Feng Zengzhao,Bao Zhidong,Wu Maobing et al. Lithofacies palaeogeography of the Cambrian in Tarim area[J]. JOPC, 2006, 8(4): 427-439.
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