甘肃成矿系列研究及矿产勘查新突破  

Breakthrough in geological prospecting based on study of metallogenic regularity

作　　者：张新虎 任丰寿 余超[2] 刘建宏 赵彦庆[2] 张发荣[2] 贾志磊 

机构地区：[1]甘肃省地矿局,甘肃兰州730000 [2]甘肃省地质调查院,甘肃兰州730000

出　　处：《矿床地质》2015年第6期1130-1142,共13页Mineral Deposits

基　　金：中国地质调查局中国矿产地质与区域成矿规律综合研究项目"甘肃省矿产资源调查成果综合集成与服务产品开发(编号:12120114058501)"子项目资助

摘　　要：甘肃省地质环境复杂,成矿条件优越,矿产资源相对丰富,构造上位于古亚洲、滨太平洋、特提斯三大构造域的交接部位,有北山、祁连山、西秦岭3个北西-南东向造山带,其间夹持着敦煌、阿拉善、中-南祁连、鄂尔多斯等地块。根据甘肃省的构造演化、岩石建造组合及矿产分布规律,运用成矿系列理论,对全省各成矿单元成矿系列和谱系作了初步研究与梳理,重新划分出10个成矿系列组,54个成矿系列,42个成矿亚系列,82个矿床式。在此基础上,进一步归并出4个矿床成矿系列组合、16个矿床成矿系列类型。通过归纳总结祁连山-龙首山、秦岭成矿区矿床成矿谱系,依据甘肃主要成矿大区不同构造环境、成矿旋回和成矿系列发育特征,运用缺位找矿思维,调整对区域矿产勘查工作部署,开展新区域、新层位、新类型、新矿种勘查找矿,取得重要成果。西秦岭地区玛曲县大水金矿、夏河县加甘滩金矿找矿成果卓著,先后列为国土资源部2010年度、2014年度全国10大找矿成果,西成铅锌矿田厂坝老矿山深部勘查资源储量大幅度增加,发现大桥金矿新类型;北祁连西段卡瓦铁矿富集区评价取得新进展,将成为镜铁山铁矿资源接续区;阿尔金成矿带青砂沟锰矿勘查实现新层位找矿突破,显示出成矿系列理论在指导区域成矿规律研究方面具有强大的生命力和科学依据。甘肃省内已设置国家级整装勘查区5个,据《2012年全国主要矿产资源储量通报》,甘肃省金矿资源储量跃居全国第2位,锰矿居全国第8位,锌、铅矿分别位稳居全国第3、6位,找矿潜力巨大。Gansu Province is relatively rich in mineral resources thanks to the complicated geological environment and favorable mineralization condition which can be ascribed to its special location which is the connection between Paleo-Asia, marginal Pacific and Tethys tectonic domain and strides Beishan, Qilanshan and west Qinling inland orogenic belt that include some uplifts and blocks such as Dunhuang, Alxa, middle Qilian and Ordos. In this paper, the authors studied metallogenic series and pedigree of each mineralization unit in terms of tectonics, stratigraphic division, rock formation and mineral distribution, and summarized 10 groups of minerogenetic se- ries, 54 minerogenetic series, 42 minerogenetic sub-series and 82 deposit styles; on such a basis, the authors grouped them into 4 associations and 16 types of minerogenetic series. By studying the minerogenetic pedigree of Beishan-Altun, Qilianshan-Longshoushan, Qinling metallogenic provinces, the authors revealed the characteris- tics of tectonic environment, metallogenic cycles and main minerogenetic seiries of key metallogenic zones. Fol- lowing the thought of absence prospective idea, the authors adjusted regional mineral prospective plan, carried out prospecting in new regions and new horizons for new types and species of minerals and achieved obvious re- suits ： In West Qinling region, the Dashui gold deposit in Maqu County and the Jiagantan gold deposit in Xia- he County are listed as one of 10 key prospecting achievements of Ministry of Land and Resources in 2010 and 2013 respectively; In the Xihe-Chenxian Pb-Zn orefield, resource reserves of the Chanba mine has increased greatly, and a new type of gold deposit was discovered in Daqiao; In western segment of North Qilian, the Kawa iron concentration area will replace Jingteishan mine as the next resource mine; In Altun metallogenic zone, the Qingshagou manganese deposit is likely to be a breakthrough of manganese prospecting in the different strata. The gold reserves of Gansu possess the second place

关 键 词：地质学 构造演化 成矿旋回 区域成矿规律 成矿系列 成矿谱系 矿产勘查新突破 甘肃省 

分 类 号：P612[天文地球—矿床学]