东秦岭地区浅隐花岗岩体遥感识别模式  

THE DISTINGUISHING MODEL OF REMOTE SENSING OF SHALLOW BURIED GRANITE MASS IN EASTERN QINLING

作　　者：张天义[1] 朱嘉伟[1] 

机构地区：[1]河南省遥感中心

出　　处：《河南地质》1996年第4期287-291,共5页Henan Geology

摘　　要：在含金地层分布区，研究揭示隐伏岩浆热源活动特征及基底导岩导矿构造特征是寻找隐伏金矿床的技术关键。本文依据花岗岩体侵位动力学及热力学机制，阐明了线、环同现构造影像的形成机理及其所揭示的地质内涵，指出了环形影像构造成因的多解性，提出了如何从纷杂的“环、线”影像构造中提取出反映岩体侵位这一特定影像构造的原则及其重要性，以遥感技术为主导，综合应用地质、物化探技术，建立了“环状影像构造－斜磁化场－重力亏损场－岩浆期后热液活动中心的多元信息同现”隐伏成矿花岗岩体的遥感综合判读模式，实现了遥感解译由模糊—定性—定量化的综合解译判读过程。论证了东秦岭一些地区存在着规模宏大的燕山期浅隐伏成矿花岗岩体，并定量解译了隐伏花岗岩体的形态、产状及规模。In the area where there is gold bearing strata,it is the technique key to seeking and prognosticating buried gold deposit to study to show the characteristics of buried granite mass and faults leading of granite magma and ore hydrothermal.In this paper,it is clarified that how the circular imagical structure and linear imagical structure appearing together is formed and what the geological meaning it shows based on the dynamics and thermodynamics mechanism of granite mass evolution.Because of the various genesis of circular imaginal structure,it is great importance to give the definite interpretation principle to distinguish the circular imaginal structure formed by granite mass evolution from various circular imginal structures.The remote sensing-synthetic information interpretation model of buried minerogenetic granite mass is set up in the paper that multielement information of circular imaginal structure,inclined magnetic field,low gravity anomaly field and ore hydrothermal field related with granite magma appearing together.It enable the interpretation from possibility to definiteness to quantitative.In the meantime,it is proved that there exists a big shallow buried Yanshanian granite mass in East Qinling orogenic zone,and the shape and occurrence of it is studied quantitatively by means of remote sensing technology along with geology,geophysical and geochemical prospection information.The ore hydrothermal with Au and assciated elements process is controlled by the double factors of buried granite mass and faults leading of ore hydrothermal.

关 键 词：花岗岩 遥感 识别模式 东秦岭 金矿床 

分 类 号：P588.121[天文地球—岩石学] P618.510.8[天文地球—地质学]