永梅凹陷带铁多金属矿成矿特征与找矿方向  

Prospecting Direction and Metallogenic Characteristics of Iron Polymetallic Ore in Yong'an-Meizhou Depression Belt

作　　者：周延[1] 武玲[1] 康丛轩[1] 范飞鹏[1] 陈乐柱[1] 骆学全[1] 

机构地区：[1]南京地质矿产研究所,江苏南京210016

出　　处：《金属矿山》2015年第9期85-89,共5页Metal Mine

基　　金：中国地质调查局地质调查项目(编号:12120113071400)

摘　　要：通过对永梅凹陷带内铁多金属矿床的赋矿层位、沉积特征、成矿物质来源以及燕山期中—酸性岩浆活动的叠加—改造作用进行研究,探讨了矿床成因和找矿方向。结果表明:1永梅凹陷带内铁多金属矿的赋矿层位以经畲组下部为主,其次为栖霞组上部,铁质主要来源于海相火山作用;2铅、锌、钨、锡等金属元素具有沉积和岩浆双来源;3燕山期中—酸性岩浆活动对铁多金属元素具有活化转移和叠加富集作用,空间上形成了铁-钼、铁-铅-锌多金属矿。基于上述结论,认为区内马坑式铁矿是海相火山沉积-岩浆热液叠加改造形成的,该区下一步找矿方向应为凹陷带东南部梅县玉水—龙岩马坑—德化阳山一线的超壳断裂带两侧,对于区内找矿工作具有一定的参考价值。The genesis and prospecting direction of the iron polymetallic deposits located in the Yong＇an-Meizhou depres- sion belt are discussed by analyzing the ore-bearing stratum, sedimentary characteristics, ore-forming material sources and the superimposition and reworking process caused by the Yanshanian intermediate-acidic magmatism of the iron polymetallic de- posits located in the YongJan-Meizhou depression belt. The research results show that ： （1）the lower Jingshe formation dominates major ore-bearing stratum of the iron polymetallic deposits, followed by the upper Qixia formation, iron is mainly derived from submarine volcanism ;（2）Pb, Zn, W, Sn and other metal elements derive from both sedimentation and magmatism; （3）the iron polymetallic elements are remobilized, superimposed and enriched by the intermediate-acidic magmatism intrusions of Yans- hanian, spatially forming the Fe-Mo and Fe-Pb-Zn polymetallic ore. Based on the above analysis results, it is considered that the ore-genesis of Makeng-type iron deposit is marine volcanic sedimentation-magmatic hydrothermal superimposition, the ore- prospecting should be oriented on both sides of ultra-crustal faults zone along Yushui-Makeng-Yangshan in the southeast Yong ＇an-Meizhou depression belt,therefore,it can provide some reference for the prospecting work in the research region.

关 键 词：马坑式铁矿 海相火山作用 成矿特征 矿床成因 找矿方向 

分 类 号：TD166[矿业工程—矿山地质测量] P611[天文地球—矿床学]