Study On Clastic Flow Deposits In Continental Rift Basins

On the basis of the actual geological background of the study area,referring to some related achievements of predecessors,combining with the analytical and laboratory data obtained from core coring in the study area,the heavy mineral analysis and clastic component analysis show that the provenance of the northern slope zone in the study area is controlled by Tongyang uplift and Wubao low uplift,while that of the southern fault terrace is mainly derived from Zhedou low uplift.Using the related seismic and geological data to analyze the slope break system in the area,it is found that the type of slope break in the northern slope zone is mainly flat,but the direction is different.As for the southern steep slope zone,it is relatively rich in types and relatively active in tectonic activities.In some areas,comb-shaped slope break zones are developed,while in others,parallel slope break zones are dominant,and cross slope break zones account for a certain proportion.Because of the small scale of the structural slope break zone,the control of sand body on the northern slope is not obvious.The triggering mechanism of clastic flow is studied by core observation and related judgment data.It is found that the triggering of clastic flow in Dainan Formation of Gaoyou Depression is mainly affected by earthquake and storm.The debris quicksand body of Fanchuan sub-depression and Liu Wushe subdepression can extend to both sides.The distribution of debris flow in Wazhuang area is limited due to the poor distribution of "beam","gully","slope".The effective supply of provenances is relatively sufficient in the areas of Yuanxiuzhuang and Majiazui.The slope break system and valley system are developed.On the whole,"Liang" + "Gully" + "Slope" is well allocated,and the debris flowing sand body is developed,which can extend further into the lake basin.Figure27;Table3;Reference 75...