航空感应激发极化效应及其在铀矿等金属矿产勘查中的应用研究  

Airborne Inductive Induced Polarization Effect and Its Application in the Exploration of Uranium and Other Metal Minerals

作　　者：张伟盟 刘波[1,2,3] 孙栋华 陈伟 骆燕 彭莉红[1,2,3] 程莎莎 刘彦涛[1,2,3] ZHANG Weimeng;LIU Bo;SUN Donghua;CHEN Wei;LUO Yan;PENG Lihong;CHENG Shasha;LIU Yantao(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang,Hebei 050002,China;CNNC Key Laboratory of Uranium Resources Geophysical Exploration Technology,Shijiazhuang,Hebei 050002,China;Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology,Shijiazhuang,Hebei 050002,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核铀资源地球物理勘查技术中心(重点实验室),河北石家庄050002 [3]河北省航空探测与遥感技术重点实验室,河北石家庄050002

出　　处：《铀矿地质》2022年第3期516-526,共11页Uranium Geology

摘　　要：近年来,国内外学者在航空瞬变电磁数据中发现了“负瞬变”现象,即dB/dt响应晚期道出现负值,被称为“航空感应激发极化(AIIP)”效应。目前,研究该效应是航空瞬变电磁技术领域的热点和前沿课题之一。文章总结了AIIP效应产生的原理,首次利用国内实测数据提取了AIIP效应信息,结合实例讨论了AIIP效应在铀矿等金属矿产勘查中的应用前景。结果表明,AIIP效应可由深部可极化体引起,可用薄膜极化和电子极化来解释,与已知金、铁、铅锌多金属矿和铀矿具有较好的对应关系。综合分析,笔者认为AIIP效应联合航磁可以解决航空瞬变电磁对中高阻矿体响应不佳的难题,AIIP效应反映的可极化体埋深与所使用的仪器、所处地区整体岩石的电阻率和矿石矿物中硫化物的多少有密切关系,可将AIIP效应信息作为航空瞬变电磁资料解释的一种参数进行应用。In recent years,the phenomenon of"negative transient"has been discovered in airborne time-domain electromagnetic(ATEM)data acquired in many domestic survey areas.It has been found that the sign of dB/dt was reversed and became negative at the late response channels.This phenomenon has been reported in foreign countries,and has been called the"Airborne Inductive Induced Polarization(AIIP)"effect.At present,the study of this effect is one of the hotspots and frontier topics in the field of ATEM technology.Based on the previous research results,this paper summarized the mechanism of AIIP effect.Explored the extraction method of AIIP effect information with domestic measured data for the first time.Combined with the applied examples,we discussed the application condition and prospect of AIIP effect in mineral exploration.The results showed that the AIIP effect caused by membrane polarization and electrode polarization is widespread in ATEM data.And the AIIP effect indicates the existence of polarizable body in the deep.AIIP apparent chargeability m extracted by the comparison of forward and actual measurement results has a good corresponding relationship with known gold,iron,leadzinc polymetallic and uranium ore,which shows the extraction method is reliable.It is considered that AIIP effect information is an effective way for the interpretation of ATEM data,because AIIP effect information combined with aeromagnetic anomalies in high-resistance rock areas can solve the problem of poor response of electromagnetic to medium-high resistance rock.Additionally,it was believed that the buried depth of the polarizable body reflected by the AIIP effect is closely related to the used instrument,the overall rock resistivity of the area where it is located,and the amount of sulfide minerals.Therefore,AIIP effect information was recommended for the interpretation of ATEM data.

关 键 词：航空感应激发极化(AIIP)效应 航空瞬变电磁 负瞬变 矿产勘查 

分 类 号：P631.3[天文地球—地质矿产勘探]