TITLE:
Exploring Sandstone Body in Weak Electrical Resistivity Contrast with AMT Data
AUTHORS:
Shancong Yao, Mao Wang, Shuxin Duan, Shuang Chen, Wusheng Liu, Delin Xu
KEYWORDS:
AMT, Inversion Model Scale, Recognizing the Electrical Resistivity Anomaly
JOURNAL NAME:
International Journal of Geosciences,
Vol.8 No.3,
March
16,
2017
ABSTRACT: AMT method with the economical and convenient superiority plays a key role in exploring the sandstone-type uranium deposits in China, which mainly meets to four problems such as the thickness of overlying strata, delineating the shape of the significant sand bodies, whether there are buried structures and knowing the basement relief. Exploring the sand body shape is the key one among such problems because sand body provides the room of uranium deposits and is the prerequisite for exploring uranium mineralization. Through an example of outlining the sandstone layer within the mudstone layers, the ability can be improved to recognize the electrical resistivity anomaly among the weak electrical property contrast by adjusting the inversion model’s scale. A route to deal with the problem was given by inverting different scale models followed by checking whether the anomalies of each inversion are reliable. Finally, the geo-electrical model was to be determined by comparing results of different scale model.