| The Red River-Jinshajiang Fault Zone, based on the difference of geologic texture, can be divided into three subzones, including the northern (the Qiantang imbricated-northward fault subzone), the middle (the Hanoi-
Zhongjiang normally reversed strike-slip fault subzone) and the southern (the Sanjiang-Ailaoshan imbricated-east ward fault subzone). The northern and the middle subzones consist respectively of three groups of approximately parallel imbricated faults,which reveals intensively compression. The southern subzone had yielded some faulted depressions that brought from conversing compression into extension during Paleogene and then they conversed into depressions, such as Hanoi, Yingge Sea, Zhongjian and other depressions as a result of reversion into compression during Neogene. The compression of Red River-Jinshajiang Fault Zone exhibits to get weakening generally from south to north under the control of Tethyan tectonic activity. The petroleum exploration in the fault zone have indicated that good oil and gas potential is present in those faulted depressions that formed during Himalayan period. |
