Baiyinchagan depression is part of downwarping faulted rift basin developed on XingmengHercynian multicycle and collision fold basement in late Mesozoic.
The area had undergone such evolution stages as passive borderland basining, squeerze-retrograde nose-like swelling, cratonic inner sagging. intracratonic basining and para-foreland basin.
10.basement and unmetamorphosed terrigenous shallow carbonate rock in the Austria Alps -South Alps obduc-tion nappe and radiolarian silicalite in fault basins.
Based on the petrographical analysis of key wells,log data is used to investigate sedimentary characters of early palaeozoic in Sulige area,Erdos basin.
Ichnofabric analysis displays a rising significance on accurate environmental interpretation of sedimentary units in oil-bearing basin and precise recognition of depositional disconuities.
This paper presents a methodology of how to use variours data to evaluate tormation damage and productivity in the northwestern margin of Junggar Easin.