地震厚度趋势法在乐乡关地垒剥蚀量恢复中的应用

Application of Seismic Thickness Trend Method in Recovery of Horst Denudation Quantity in Lexiangguan

应用地震厚度趋势法恢复乐乡关隆起地层剥蚀量,探讨盆地沉积充填特征、构造旋回阶段划分及其演化,分析各期潜北断层活动强度及对沉积的控制和影响。总体上,潜北断层在荆河镇-潜一段、潜四下沉积时期对地层沉积具有强烈的控制作用,在荆河镇组、潜四下沉积时期潜北断层下降盘应存在陡坡扇三角洲沉积。

Seismic thickness trend method has been used for recovery of horst denudation quantity in Lexiangguan with the purpose of discussing basin deposition filling and tectonic cycle phase division as well as its evolution and analyzing intensity of fault activity at each period in Qianbei and its control over and impact on deposition. The result shows that Qianbei Fault played a strong role in controlling stratigraphic deposition at the sedimentary period of Qian -1 Member and lower Qian-4 Member in Jinghe Town and that Qianbei thrown side could be developed with slope fan delta deposition at the sedimentary period of Jinghezhen Formation and lower Qian-4 Member.