关键词: 裂谷盆地, 汇水-扇体系, 断层滑动速率, 降水速率, 松辽盆地

Abstract: Climate and tectonics are the two key controls for the formation of the stratigraphy of a rift basin. Zscape numerical landscape evolution model reveals some climate and tectonic processes about the formation of the stratigraphy by the simulation to catchmentfan system of the rift basin. Some views from the analyses of sequence stratigraphic architecture and the relevant experiments results of Zscape model are:(1) there are an inverse relationship between the fan area and the fault slip rate；(2) the progradation of a large amount of sediments during highstand is result from the decreased fault slip rate；and (3) the formation of the sequence boundary and the sedimentation during the lowstand and the transgressive are the results from of the changes of precipitation rates. These views are used in analyzing the development of the fans of the Shahezi Formation in the Beian faulting depression and the formation of the sequence architecture. The tectonic activity was violent during the development of the lower sequence of the Shahezi, and it turned to be relatively stable during development of the upper sequence. The faulting and the changes of precipitation rates controlled the development of the sequences of the Shahezi Formation. The Zscape model and the geological analysis of its experimental results, as well as its application in the Beian faulting depression, demonstrate the significances for some geological understandings by analysis of tectonic and climate factors, especially in the theoretical interpretation of deposition lagging to faulting.

Key words: rift basin, catchmentfan system, fault slip rate, precipitation rate, the Songliao basin