The Silurian is composed of Kepingtage Formation, Tataaiertage Formation and Yimugantawu Formation.With the well samples and field investigation,there are green-grey mudstone,silty mudstone,mudy siltstone,siltstone,fine sandstone and middle sandstone in the Silurian in Tazhong area.The sedimentary structures include horizontal bedding,parallel bedding,lower angle cross bedding,wedge-shaped cross bedding and trough cross bedding.The author presents the shore-neritic depositional system was developed in the lower bitumen-bearing sandstone member during Silurian in Tazhong area of Tarim basin ,which were made up of foreshore-nearshore facies, neritic shelf facies, neritic sand bar, tidal ridge facies which have more storm deposits. There are mainly tidal flat depositional system in the upper bitumen-bearing sandstone member,which have some foreshore and nearshore facies. The width of the shore-neritic depositional sysytem is n×10 KM. The shore-neritic depositional sandstones are good reservoir.
About author: Zhu Rukai, born in 1968,was graduated from the Department of Geology, and obtained PH.D degree from Peking University in 1994.Now he has been engaged in sedimentology and reservoir geology.
Cite this article:
. Sedimentary facies and depositional model of the Kepingtage Formation of Silurian in Tazhong area , Tarim Basin[J]. JOURNAL OF PALAEOGEOGRAPHY, 2005, 7(2): 197-206.
. Sedimentary facies and depositional model of the Kepingtage Formation of Silurian in Tazhong area , Tarim Basin[J]. JOPC, 2005, 7(2): 197-206.
