豫西Au-Mo-W-Pb-Zn-Ag-Fe-铝土矿-石墨成矿带主要地质成矿特征及潜力分析

Metallogenic Characteristics and Potential Analysis of the Yuxi Au-Mo-W-Pb-Zn-Ag-Fe-Bauxite-Graphite Metallogenic Belt in Western Henan

随着地质大调查的开展,豫西地区新的找矿进展和预测成果不断涌现,使之成为我国重点找矿地区之一,需要对其开展系统的成矿区划和部署研究工作。本文以新的研究成果和找矿突破为基础,通过综合分析,在该地区划分新的重要成矿部署区带,厘定边界并将其命名为"豫西Au-Mo-W-Pb-Zn-Ag-Fe-铝土矿-石墨成矿带"。结合区域成矿地质背景的综合研究,在区内划分了10个成矿亚带,初步建立了Au-Mo-W-Pb-Zn-Ag-Fe-铝土矿-石墨成矿带成矿谱系,其成矿作用具有多期次发育和多系统控制的特点,在时间演化上表现为多旋回性、继承性、新生性和叠加性特点,主要成矿期有前寒武纪、寒武纪-早石炭世、晚石炭世-中三叠世和晚三叠世-早白垩世,其中晚侏罗世-早白垩世是内生金属矿床成矿大爆发期。研究区主要成矿类型为岩浆热液型金银铅锌矿、斑岩型-矽卡岩型钼钨矿、层控热液型和海相火山岩型铅锌矿、古风化壳残积型铝土矿、沉积-变质型铁铜石墨矿和伟晶岩型稀有金属矿等。结合区域找矿进展和潜力评价最新成果,认为本区金、钼钨、铅锌银、铝土矿、铁、石墨、煤矿潜力巨大,为下一步勘查部署的主攻矿种,同时在本区划分了25个远景区,其中14个为重点远景区,11个为一般远景区,对研究区下一步矿产勘查部署工作有一定指导意义。

Western Henan province has become one of the most important areas for exploration in the future,with the constant emergence of prospecting progress and assessment results,and systematic study on metallogenic planning and exploration deployment are on demand.Based on the prospecting progress and assessment results,this study has confirmed a new metallogenic belt,which was named the Yuxi Au-MoW-Pb-Zn-Ag-Fe-bauxite-graphite metallogenic belt after revision of its boundary.Combined with the analysis of regional geology setting and the previous work,we divided the study area into ten submetallogenic belts,and preliminarily established the metallogenic lineage of this metallogenic belt.The mineralization in this area is characterized by multiple stages and multiple ystems,multi-cycle,inheritance and superimposition in the time evolution.The main metallogenic epoches are Precambrian,Cambrianearly Carboniferous,late Carboniferous-Triassic and the late Triassic-early Cretaceous,of which the late Jurassic-early Cretaceous was the metallogenic outbreak period of endogenic ore deposits.The main metallogenic types in study area are：magmatic hydrothermal type gold-silver and lead-zinc mineralization,porphyry and skarn type molybdenum-tungsten mineralization,stratabound hydrothermal type and marine volcanic type lead-zinc mineralization,ancient weathering crust type residual bauxite,sedimentarymetamorphic iron copper graphite mineralization and pegmatite type rare metals mineralization.Combined with regional prospecting progress and the latest potential assessment results,gold, molybdenumtungsten,lead-zinc-silver,bauxite,iron,graphite and coal have huge potential and are the main targeting minerals in this area for next exploration deployment.Besides,this research also determined 25 prospecting areas in the Yuxi Au-Mo-W-Pb-Zn-Ag-Fe-Bauxite-Graphite metallogenic belt,with 14 of key prospecting areas.This study will be of big significance for the next exploration deployment.