Abstract The evolution between North China Sea and Qilian Sea of the Ordovician in Ordos Basin has been remained one of the problems for many years. The evolution characteristics of conodont fauna in Ordovician and its relationships with North China Sea and Qilian Sea have been highly discussed in this article on the basis of the irreversibility of ecology evolution and palaeontologic subareas, and the systematic stratigraphic correlation of Ordovician in the central east, west and south part of the basin It has been decided that the late period of the greatest transgression of Majiagou Age 4 was the time when Qilian Sea invaded into the west part of the basin, and the invaded range did not exceed beyond the west line from Well E 6 to Well Dintan 1 on the central paleo-uplit. The central paleo-uplift had played a role in dividing the North China Sea and Qilian Sea after the sedimentation of Majiagou Age 4 In the light of the features of conodont fauma and the geographic distribution of different stages, combined with the ancient structures and the lithofacies marks, the characteristics of lithofacies palaeogeography of different ages have been reconstructed. This research will establish a geological foundation for natural gas exploration in the Ordovician.
About author: Fu Jinhua, born in 1963, graduated from Geology Department of Jianghan Petroleum Institute in 1982. Now he is a senior engineer of Research Institute of Petroleum E m P of Changqing Oilfield Company
Cite this article:
Fu Jinhua,Zheng Congbin. EVOLUTION BETWEEN NORTH CHINA SEA AND QILIAN SEA OF THE ORDOVICIAN AND THE CHARACTERISTICS OF LITHOFACIES PALAEOGEOGRAPHY IN ORDOS BASIN[J]. JOPC, 2001, 3(4): 25-34.
Fu Jinhua,Zheng Congbin. EVOLUTION BETWEEN NORTH CHINA SEA AND QILIAN SEA OF THE ORDOVICIAN AND THE CHARACTERISTICS OF LITHOFACIES PALAEOGEOGRAPHY IN ORDOS BASIN[J]. JOPC, 2001, 3(4): 25-34.
