秦岭Au- Pb- Zn成矿带成矿地质特征及潜力分析

地质大调查开展以来,秦岭地区地质调查和找矿勘探取得了重要进展,已成为我国重要的找矿远景区之一。为了更好地部署下一步找矿工作,开展了区域成矿规律总结研究、成矿远景区划分和找矿工作部署。本文重新划定了(修定)秦岭Au-Pb-Zn成矿带的边界。建立了秦岭成矿带的成矿系列组合,其中印支期是金铅锌大规模成矿的爆发期,区内矿床主要发育有卡林型金矿、造山型金矿、海底喷流-沉积-改造型铅锌矿、VMS型铜多金属矿、低温热液脉状汞锑矿、岩浆期后热液型铜金多金属矿等类型,带内仍具有极大的找矿潜力。结合区域找矿进展和潜力评价的最新成果,在该带内圈定了20处找矿远景区,其中8处为重点远景区,12处为一般远景区,建议下一步找矿勘查部署的主攻矿种为Au、Pb、Zn、Cu,主攻矿床类型为卡林型金矿、造山型金矿、海底喷流-沉积-改造型铅锌矿和岩浆期后热液型铜金多金属矿。该项成果对指导本成矿带下一步矿产勘查部署具有重要的意义。

Geological Characteristics of Minerogenesis and Prospecting of Qinling Au Pb Zn Metallogenic Belt

Major breakthroughs of geological survey and mineral explorations have been made in the Qinling region since the beginning of comprehensive geological survey, and Qinling region has became a promising mineral exploration region inChina. In order to have a better deployment for future works and promote the integrated studies of regional metallogenic regularities, as well as outline the metallogenic regions, this paper revised the boundary of Au- Pb- Zn metallogenic belt in the Qinling region, and established the metallogenic series and association in this region. In the Indosinian, Au, Pb, and Zn deposits formed abundantly. Carlin gold deposits, Orogenic gold deposits, Sedimentary exhalative and deformed Pb- Zn deposits, VMS Cu polymetallic deposits, epithermal vein type Hg- Sb deposits, and intrusion related hydrothermal Cu pllymetallic deposits have been collectively considered as major deposit types to be discovered in the future. Combined with the latest findings of assessment of mineral exploration potentials and development of regional exploration, we have outlined 20 places with well exploration potential, eight of which should be given major concerns, the rest deserves less but still certain attentions. We propose the Au, Pb, Zn, and Cu, and Carlin deposits, Orogenic gold deposits, Sedimentary exhalative and deformed Pb- Zn deposits, and intrusion related hydrothermal Cu pllymetallic deposits should be given priorities in the next stage of geological survey of mineral deposits.