闽西南推覆构造控矿的地质-地球物理模型  

Geological and Geophysical Model of Thrust Controlling on Iron Ore Deposits in the Southwestern Fujian Province

作　　者：张旭[1] 张达[1,2] 谭捍东[1] 林全胜[1] 狄永军[1] 吕良冀[1] 刘敏[1] 王改梅[1] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室,北京100083 [2]中国地质大学岩石圈构造、深部过程及探测技术教育部重点实验室,北京100083

出　　处：《地球科学（中国地质大学学报）》2012年第6期1243-1251,共9页Earth Science-Journal of China University of Geosciences

基　　金：地质调查项目“武夷山植被覆盖区成矿地质背景研究与成矿要素综合推断”(No.1212011085472);大学生创新性实验计划项目(No.51900265029);武夷山成矿带中生代推覆构造与铜多金属找矿方向研究(No.1212010813064);武夷山成矿带铜多金属成矿规律研究(No.1212010533105);“111”计划(No.B07011)

摘　　要：闽西南地区位于武夷山成矿带西南部,自元古宙以来经历了多期次的构造演化,推覆(滑脱)构造广泛发育,并对区内"马坑式"铁多金属矿床具有控制作用.通过对推覆构造特征、主要赋矿岩层和推覆界面的研究发现,闽西南地区主要的赋矿岩层为C2+3-P1q,主要沿AnD/C1l及C1l/C2+3+P1q这2个界面发生推覆,以上2个区域性的推覆构造面可以作为成矿热液的地球化学屏蔽层位.通过地表地质对深部赋矿岩层及推覆界面的分布和构造格局进行解析,结合可控源音频大地电磁法(CSAMT)进行的深部探测剖面解译,建立了闽西南推覆构造控矿的地质-地球物理模型,该模型在一定程度上可为该地区深部矿产预测提供依据.The southwestern Fujian is located in southwestern Wuyishan mineralization zone,where nappe（slippage）structures extensively developed after a multi-stage tectonic evolution since the Proterozoic,with control over＂Ma Keng＂-small,medium and large iron polymetallic deposits in the region.It is found in this study on nappe structures associated with ore-bearing rocks and nappe interfaces that the ore-bearing strata mainly consist of C2＋3-P1q;the nappe mainly occurred along the AnD/C1l and C1l/C2＋3＋P1qinterfaces;and these two regional nappe structures may be the geochemical shield of the hydrothermal ore-forming fluid.A ore-controlling geological-geophysical model of the nappe structure in southwestern Fujian is established by surface geological analysis of distribution and tectonic framework of the deep ore-bearing rock and nappe interface combining the interpretation of deep controlled source audio magnetotelluric method（CSAMT）,which will certainly facilitate deep prospecting.

关 键 词：推覆构造 铁多金属矿床 控矿特征 地质-地球物理模型 成矿预测 矿床 

分 类 号：P542[天文地球—构造地质学]