Abstract:

With many faults in Carboniferous，the styles of the faults are diversity，there are thrust fault，back fault and flushes fault.As a zonality of plane distribution，the faults spread in five directions，i.e.，northeast to southwest， northwest to west and northeast to east， northeast to east and northwest to west， northwest and northeast，and near east to west.The characteristics of the fault development period are very obvious，and the different tectonic movements effected differently on the fault development and on the fault distribution.The present faults in Carboniferous are as a result of many stacking tectonic movements.According to faults analysing in seismic profiles and reflection characteristics of neighbor strata，based on deformation characteristics between the above and under formations，changes in the thickness and difference of time faults cutting strata，the periods of fault development and fault duration are judged.So the faults in Carboniferous were separated by the the fault development period，and the plane distribution of faults in very key tectonic movement time is clear.The Carboniferous faults of Junggar basin are divided by its times into Hercynian fault，Indosinian fault and Yanshanian-Himalayan fault.The Hercynian fault is the foremost Carboniferous fault，and this kind fault continues to act in the last time.In general，the Carboniferous fault just growing in Hercynian mainly distributes in the hinterland of Junggar basin，in Indosinian mainly distributes in the northeast margin of Junggar basin and in Yanshanian-Himalayan mainly distributes in the east area of Junggar basin.

Key words: Junggar basin, Carboniferous, fault, tectonic movement, distribution characteristic, development period