东天山-北山Cu- Ni- Au- Pb- Zn成矿带主要成矿地质特征及潜力分析

文章通过潜力评价成果汇总和综合分析,结合找矿新理论和该区找矿新进展,重新划定(修定)了东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带的边界。东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带位于西伯利亚板块和塔里木板块之间,在漫长的地质构造演化过程中经历了多次裂解、拼合、造山等构造运动,相应地发生过多期、多阶段的成矿作用,致使此带形成了众多不同矿种、不同类型的矿床,是矿产勘查突破的有利区带。作者从研究区构造演化历史出发,分析了该带区域成矿地质背景,结合带内最新的找矿进展,修订了东天山-北山Cu-Ni-Au-Pb-Zn重点成矿带的成矿谱系,深化了对本成矿带的成矿规律认识;新一轮矿产资源潜力评价证实,带内仍然具有极大的资源潜力,在此基础上,在本带划分了19个远景区,其中9个为重点远景区,10个为一般远景区;提出了带内可能发现新矿床类型(如:砂岩型铀矿、斑岩型金矿等)和新矿种(如稀有稀散金属等);建议本带下一步勘查部署的主攻矿种为Ni、Cu、Mo、Au、W,兼顾Pb、Zn、Ag、Fe和Mn;建议本带主攻类型为基性-超基性岩型镍铜矿、斑岩型铜(钼、金)矿、破碎蚀变岩型金矿、碳酸盐岩-细碎屑岩型铅锌银多金属矿、海相火山岩型铁矿、矽卡岩型银矿以及沉积型锰矿等。该项工作对指导本成矿带下一步矿产勘查部署工作有一定指导意义。

Geological Characteristics and Resource Potential Analysis of the Dongtianshan Beishan Cu- Ni- Au- Pb- Zn Metallogenic Belts

On the basis of compilation of assessment for mineral resources, new geological theory and our prospecting results, this study re defined the boundary of the Tianshan Beishan Cu- Ni- Au- Pb- Zn metallogenic belt, which is located between Siberian plate and Tarim plate. It has gone through multi stages tectonic activities, including several breakup, convergence and orogeny, resulting in the formation of many large and super large deposits with a variety of mineral species and types. Therefore, this belt should be the preferential areas for prospecting breakthrough. With the focus on the tectonic evolution and the latest prospecting progress, authors analyzed the regional geological background and summarized the metallogenic lineage of the Tianshan Beishan Cu- Ni- Au- Pb- Zn metallogenic belt. This has deepened our understanding of the metallogenic belt. A new round of assessment for resources potential confirms that it is of big resources potential. 19 prospective areas were defined, including nine key prospecting areas and 10 average areas. This study proposes the possibility to find new deposit type (such as sandstone type uranium ore deposits and porphyry type gold deposits) and new mineral species (rare metals). The area was found to enrich in elements such as Ni, Cu, Mo, Au and W, as well as Pb, Zn, Fe and Mn.It is suggested that the next prospecting should concentrate on mafic ultramafic Ni Cu deposits, porphyry type Cu (Mo Au) deposits, crushed alterated rock Au deposits, carbontic rock clastic rock Zn Pb Au deposits, marine volcanic iron deposits and skarn type gold deposits and sedimentary Mn deposits, and so on. This study will be of some guiding significance to next prospecting work plan in the Tianshan Beishan Cu- N-i Au- Pb- Zn metallogenic belt.