四川石渠地区第四系厚度特征

Thickness of the Quaternary in Sêrxü, Sichuan

通过对四川石渠地区钻孔数据的研究,绘制了石渠地区第四系厚度等值线图,总结了石渠地区第四系厚度特征,得出石渠地区第四系厚度总体在0.47~46.4m,大部分在20~40m之间,蒙沙寺附近第四系地层厚度最大,达46.4m。第四系等厚线总体走向呈NW向,相对的沉积中心主要分布于呷衣南西、宋恰呷马北西、西区、德荣马、长沙贡马、格孟、石渠-蒙宜、蒙格寺-新荣、长沙干马等地。这些沉积中心总体上呈现为北西-南东走向,显示为可能受构造控制的线性特征,为第四纪环境演化和活动构造研究提供基础资料。

Based on the study of drilling data in Sêrxü, Sichuan, a thickness contour map of the Quaternary in the Sêrxü area is drawn, and the thickness characteristics of the Quaternary in the Sêrxü area are summarized. From these it is concluded that the total thickness of the Quaternary in the Sêrxü area is 0.47-46.4m, mostly ranging from 20 m to 40 m. The thickness of the Quaternary near the Mengsha Temple is the largest,up to 46.4 m. The Quaternary isopach strike is NW-trending, and the relative sedimentary centers are mainly located in the southwest of Gayi, the northwest of Songqiagama, West District, Derongma, Changshagongma,Gemeng, Sêrxü-Mengyi, Mengge Temple-Xinrong and Changshaganma, etc. These sedimentary centers are generally NW-trending, showing a linear feature that may be controlled by the structure which provides basic data for the study of Quaternary environmental evolution and active structures.