豫西洛宁故县水库-全包山EH4测深断面及深部找矿启示  

EH4 Magnetotelluric section from Guxian Reservior to Quanbaoshan Mountain,southwest Luoning County,western Henan Province,and its implications for deep ore prospecting

作　　者：梁涛 袁稳 卢仁 王明明 

机构地区：[1]河南省有色金属地质勘查总院,郑州450052 [2]河南省有色金属深部找矿勘查技术研究重点实验室,郑州450052

出　　处：《地球物理学进展》2012年第5期2175-2182,共8页Progress in Geophysics

基　　金：河南省国土资源厅科技攻关项目(项目编号:2010-61-5和2011-622-25);河南省有色金属地质矿产局科研项目(项目编号:YSDK2011-10和YSDK2012-03)

摘　　要：故县水库-全包山EH4测深断面中的电阻率异常体具有边界清晰、规模各异、形态复杂的特征.不仅发现7个规模较大的高阻异常体隐伏于地表之下,还识别出一系列椭圆状-近圆状孤立分布的小规模高阻异常体,低阻异常体被划分成接触式、环绕式、刺入式、孤立式和延伸式等5种形态类型.EH4断面中高阻异常体是隐伏岩体体系的显示,其中高阻异常体P1和P2中分别包含隐伏斑岩体和爆破角砾岩.结合野外地质特征,认为低阻异常体N15和N17是断层破碎带和地下水综合作用的显现,而位于EH4测深断面深部(约地表200米以下)的低异常体则是深部流体活动的产物.在透岩浆流体成矿理论框架下,结合故县水库大环(弧)套小环(弧)遥感影像的深部动力学解释,探讨了EH4断面中所显示的未完全固结岩浆体系和深部流体间的作用关系,指出了新的深部找矿靶区.Resistivity anomaly units in EH4 magnetotelluric section from Guxian Reservior to Quanbaoshan Mountain are characteristic of distinct boundary,different scale and complex shape.There are 7 higher resisitivity anomaly units with bigger size under the surface,and a series of higher resistivity anomaly units with small size,elliptical shape and isolated distribution are recognized.Lower resistivity anormaly units are divided into five types,contacted,surrounded,penetrated,isolated and extended.The higher resisitivity anormaly units in EH4 magnetotelluric section are considered the existance of hidden igneous body,for instance,P2 and P3 include the hidden porphyric body and cryptoexplosion breccia body,respectively.The lower resistivity anormaly units of N15 and N17 are the products of fault zone and underground water on the basis of field survey.The lower resisitivity anamaly units,however,in the deeper part（about lower surface over 200m） are the result of deep fluids activities.According to the metallogenic theory on the transmagmatic fluids and deep dynamic process explain for Guxian reservior remote sensing image characterized by bigger sized ring-arc structure included the smaller one,the relationship displayed in EH4 section between incomplete consolidation magma system and deep fluids,and new exploration targets are discussed.

关 键 词：故县水库 Ag多金属矿集区 EH4测深 隐伏岩体体系 透岩浆流体 熊耳山 

分 类 号：P631[天文地球—地质矿产勘探]