世界核地质科学2024，Vol.41Issue(1)：174-184,11.DOI:10.3969/j.issn.1672-0636.2024.01.015
CSAMT在松辽盆地梅里斯地区铀矿勘查中的应用
The application of CSAMT in uranium exploration in Meilisi area of Songliao basin
摘要
Abstract
Sifangtai formation of the Upper Cretaceous is one of the main horizons for uranium exploration in the northern part of Songliao basin.The uranium mineralization is mainly controlled by the sedimentary system of the Upper Cretaceous meandering river delta.Uranium deposits are mainly enriched in the bottom sandstone layer,mostly in plate-like and lens shaped shapes.The size of the ore body is closely related to the size and number of layers of the sand body,the larger the sand body size is,the larger the ore body size is.Conversely,the smaller the size of ore body is.However,the development of sand bodies at the bottom of the Upper Cretaceous Sifangtai formation in Meilisi area of the western overlying zone of Songliao basin is not yet clear,in this article controlled source audio-frequency magnetotelluric(CSAMT)was used to invert the resistivity section of the study area with the Occam algorithm.Combined with the resistivity characteristics of rocks in various layers of the study area,the structure of the cap rock was analyzed,especially the spatial distribution characteristics of the Cretaceous Sifangtai formation in the target layer for ore exploration.At the same time,the characteristics of basement undulation,as well as strike,dip,and depth of the fault were also inferred.The research showed that the river facies sand bodies of the Sifangtai formation in the study area are mainly distributed in the southeastern part of the study area,mostly in a lens shape,showing a gradually pinching feature from southeast to northwest,with a thickness generally not exceeding 180 meters.The achievements of this measurement provided a basis for the deployment of featured drilling engineering.关键词
可控源音频大地电磁测深/四方台组/松辽盆地/砂体Key words
CSAMT/Sifangtai formation/Songliao basin/sand body分类
天文与地球科学引用本文复制引用
牛禹,王培建,张正阳,谢明宏..CSAMT在松辽盆地梅里斯地区铀矿勘查中的应用[J].世界核地质科学,2024,41(1):174-184,11.基金项目
受中国核工业地质局黑龙江省明水—拜泉地区可控源音频大地电磁测量项目(编号:202212-16)资助 Supported by Controlled Source Audio-frequency Magnetotelluric Project in the Mingshui-Baiquan area of Heilongjiang Province(No.202212-16) （编号:202212-16）
