现代地质2011，Vol.25Issue(6)：1167-1173,7.
应用音频大地电磁法探测内蒙古巴丹吉林高大沙山结构及成因
Applying Audio-magnetelluric Method to the Study of Megadune Structure and Formation in Badain Jaran Desert, Inner Mongolia
任伟 1金胜2
作者信息
- 1. 中国地质大学地球物理与信息技术学院,北京100083
- 2. 中航勘查设计研究院有限公司,北京100098
- 折叠
摘要
Abstract
Badain Jaran Desert has a rare group of megadunes in the world;the audio-magnetelluric ( AMT) method was used to study the structure of megadunes in Badain Jaran desert. The audio-magnetelluric data was processed by nonlinear conjugate gradients method, and the resistivity sections of megadunes were obtained. There is a apparent low-resistivity zone existing in the deep of the section, and a certain scale high-resistivity zone in the central of the megadunes. It is inferred that the formation of megadunes is related to the stabilized northwest wind, continuous groundwater replenishment and the special environment. The groundwater rises through transpiration and is obstructed by calcareous layers in the ancient sand dunes, then is evaporated from the bottom of the leeward slope;the water vapor is condensed on the surface of sands which roll down from the top of dunes, enhancing the ability to resisting wind erosion of sands, thus the sand dunes get larger and larger as time goes by, turning to megadunes.关键词
音频大地电磁法/高大沙山/结构和成因/巴丹吉林沙漠Key words
audio-magnetelluric method/ megadune/ structure and formation/ Badain Jaran Desert分类
天文与地球科学引用本文复制引用
任伟,金胜..应用音频大地电磁法探测内蒙古巴丹吉林高大沙山结构及成因[J].现代地质,2011,25(6):1167-1173,7.
