都日木断陷地面高精度磁力测量成效分析

都日木断陷是二连盆地中一个中新生代单断型凹陷 ,其地表景观为腾格尔沙漠的一部分。根据地面高精度磁力测量结果 ,结合地质背景资料 ,弄清了该断陷基底起伏变化形态 ,推断了主要断裂及其发育特征 ,预测了三个局部构造及其基底顶面埋深 ,指出了蒙古勒西局部磁力高为有利勘探区。该工作不仅为该区下一步勘探指明了方向 ,也为在沙漠区进行地面磁力测量积累了经验。

EFFECT ANALYSIS OF SURFACE SURVEYING OF MAGNETIC DENSITY IN DURIMU DEPRESSION

Durimu Sag is a Mesozoic Cenozoic sag of Erlian Basin and its landscape is a part of Tengger Desert. Based on the data of magnetic density surveying and regional geology, the basement relief of the sag is determinated. Then the main faults and their development features are also reduced and three local structures and their top depths are predicted. This work points out the exploration direction of Durimu Sag and contributes to the knowledge of surface magnetic density surveying in desert areas.