吉黑东部Au- Ag- Cu- Mo 石墨成矿带主要地质成矿特征及潜力分析

随着地质大调查的开展,吉黑东部地区新的找矿进展和预测成果不断涌现,使之成为我国下一步找矿的重要地区之一,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"吉黑东部Au-Ag-Cu-Mo-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3个III级成矿带,初步建立了Au-Ag-Cu-Mo-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,其中海西期与印支末期-燕山期是成矿大爆发期。研究区主要成矿类型为沉积变质型石墨铁金矿、海相火山气液型铜铅锌多金属矿、接触交代型、岩浆热液型多金属矿和岩浆型铜镍矿。结合区域找矿进展和潜力评价最新成果,认为本区Au、Ag、Cu、Mo、石墨潜力巨大,为下一步勘查部署的主攻矿种,同时在本区划分了13个远景区,其中7个为重点远景区,6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。

Geological Metallogenic Characteristics and Mineral Resource Potential of the Au-Ag-Cu-Mo Metallogenic Belt in Eastern Jilin Heilongjiang Provinces

Eastern Jilin Heilongjiang provinces have become the most important areas to 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 confirmed a new metallogenic belt, revised its boundary and named it the Jiheidong Jilin Heilongjiang Au-Ag-Cu-Mo metallogenic belt. Combined with the analysis about regional geology setting, we divided the study area into three III grade belts, and preliminarilyy established the metallogenic pdigree of this metallogenic belt based on the previous work. The mineralization in this area is characterized by multi phase and multisystem, and the show multi cycle, inheritance, and superimposition in the time evolution sequence.The Hercynian and The late Indosinian Yanshanian were the metallogenic outbreak period. The main metallogenic types in study area are: sedimentary metamorphic graphite-Fe-Au deposit, marine volcano gas hydrothermal Cu-Pb-Zn polymetallic deposit, contact metasomatic magmatic hydrothermal polymetallic deposit, and magmatic copper Nickel deposit. Bedides, this research also determined 13 prospect areas in eastern Jilin Heilongjiang provinces Au-Ag-Cu-Mo Metallogenic belt and 7 of those are the key areas, and this work may guide the next exploration deployment work effectively.