用区域重力资料确定的华北地台南缘地缝合线及其地质意义  

THE SUTURE IN THE SOUTHERN MARGIN OF NORTH CHINA PLATFORM TO DETERMINE BY USING THE REGIONAT GRAVITY SURVEY DATA

作　　者：张晓春 冯凤雪 王正晓 

机构地区：[1]河南省地球物理工程勘察院

出　　处：《河南地质》1997年第4期298-306,共9页Henan Geology

摘　　要：利用１∶２０万区域重力资料，结合航磁，电磁测深、遥感、天然地震等丰富的地质、地球物理资料，根据断裂的地质、地球物理标志，在华北地台南缘发现并确定了控制火山喷发的裂隙—中心式古火山通道，即隐伏的北西西向的上戈—铁炉坪—付店超壳断裂带。该断裂属华北地台南缘不同时代、不同性质的近东西向的地缝合线。研究认为：该断裂及其次级断裂不仅是重要的长期多次活动的控岩、导矿和容矿构造，而且也为矿床的多次改造、叠加和再富集提供了热源。它的发现，对重新认识豫西地区大地构造的演化特征，建立新的成矿模式，拓宽该区的找矿前景具有重要意义。To use the regional gravity survey data on scale of 1∶200000 and to combine the abudant geological geophysical data of aeromagnetic survey,electromagnetic sounding,remote sensing,natural earthquake and so on,and according to the signs of faulted geologic geophysical marks,the fissure central type paleovolcano conduit,i.e.the Shangge Tieluping Fudian ultra earth crust faulted zone in buried NWW direction in the southern margin of North China platform has been found and determined.This faulted zone was belonged to the suture in near EW direction with different time and characteristics in the southern margin of North China platform.The authors have considered that the fault and its subsidiary fracture are not only the important rock control ore pass host structures with long term and multiple activation but also the heat resource of multiple transformation superimposition enrichment for the deposits.This discovery is of great importance to the reconsideration of geotectonic evolution characteristics of West Henan,the establishment of new metallogenic model and openning up the prospecting vast vistas.

关 键 词：重力异常 断裂 地台 地缝合线 地质意义 

分 类 号：P542.3[天文地球—构造地质学] P544.1[天文地球—地质学]