(1. 中南大學 地球科學與信息物理學院，長沙 410083；
2. 有色資源與地質(zhì)災(zāi)害探查湖南省重點實驗室，長沙 410083；
3. 中南大學 地質(zhì)調(diào)查研究院，長沙 410083)
摘 要: 對深部探測地球物理找礦領(lǐng)域中最為常用的CSAMT法的反演技術(shù)進行探索。首先利用一維Bostick反演方法進行野外實測數(shù)據(jù)的反演；由于Bostick反演結(jié)果較為準確地確定了探測深度，然后將一維反演斷面信息作為二維反演的初始模型斷面，利用Occam反演方法進行正則化反演；再進行地質(zhì)解釋，間接地提高了地電斷面初始模型的正確度；最后結(jié)合東昆侖地區(qū)某Cu、Pb、Zn多金屬礦CSAMT實際勘察結(jié)果，分析總結(jié)這種數(shù)據(jù)處理方法的認知。結(jié)果表明，逐級反演技術(shù)提高了勘察效果，為今后勘察提供了有益的經(jīng)驗。
關(guān)鍵字: 可控源音頻大地電磁測深；逐級反演；精度；東昆侖
（1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
2. Key Laboratory of Non-ferrous Resources and Geological Detection, Ministry of Hunan Province, Changsha 410083, China;
3. Research Institute of Geological Survey, Central South University, Changsha 410083, China）
Abstract:The inversion technique of CSAMT method which is widely used in the field of geophysical prospecting was investigated. Firstly, one-dimensional Bostick inversion method was used in the inversion of data measured in the field; secondly, the cross-section of one-dimensional inversion was taken as an initial cross-section model of the two-dimensional inversion since the probing depth determined by Bostick inversion is relatively accurate, and we Occam inversion method was used for positive inversion; thirdly, geological interpretation was concluded, which improves the accuracy of the initial geoelectric section model indirectly; at last, this data processing method was analyzed and a conclusion was drown while integrating the CSAMT survey results of eastern Kunlun Cu, Pb and Zn polymetallic ore. The results show that step by step inversion technique contributes directly to the survey result, which provides useful experience for future investigation.
Key words: controlled source audio frequency magnetotelluric sounding; progressively inversion; accuracy; east Kunlun
