青藏高原及邻区重要成矿带矿产资源基地调查与研究进展  

Mineral resources base investigation and research status of the Tibet Plateau and its adjacent major metallogenic belts

作　　者：唐菊兴[1] TANG JuXing(MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China)

机构地区：[1]中国地质科学院矿产资源研究所自然资源部成矿作用与矿产资源评价重点实验室,北京100037

出　　处：《岩石学报》2019年第3期617-624,共8页Acta Petrologica Sinica

基　　金：国家重点研发计划项目(2018YFC0604101);中国地质调查局二级项目(DD20160026)联合资助

摘　　要：西藏四大成矿带是特提斯洋漫长演化的产物,尤其近年来一系列超量富集铜金矿床的发现和勘查评价的成果,使得西藏不仅成为我国最重要的资源储备和开发基地之一,更是国家资源安全保障基地。然而,由于自然环境恶劣、地质工作艰辛、工作程度较低等原因导致带内众多关键地质问题仍未解决,尤其是被称为"世界屋脊的屋脊"的班公湖-怒江成矿带(简称班-怒带)的地质调查和矿产勘查评价工作受到严重制约。针对上述问题,由中国地质科学院矿产资源研究所牵头和主导的多个项目,与国内外12个高校、研究所、地勘单位、企业开展"产学研用"合作,以1∶5万区域(矿产)地质调查和综合研究为技术手段,以解决制约找矿突破的关键性科学问题为目标,取得了一系列重要认识:(1)从青藏高原中部构造、沉积、岩浆耦合等多方位出发,对晚三叠世-早白垩世的特提斯洋演化进行了深入的研究,提出了全新的认识,为找矿突破奠定了基础。(2)对多龙矿集区铜金矿床地质特征、矿床类型厘定、成矿动力学机制及矿床保存条件进行了细致的刻画,建立了斑岩-高硫化浅成低温热液型铜金矿的成矿模式和勘查模型,深化了多龙铜资源基地成岩成矿作用和成矿规律的认识,进一步指出多龙矿集区作为藏北"明珠"般地潜力及特色,做实了藏西国家级有色金属储备基地。(3)对班公湖-怒江成矿造山带野外填图工作方法进行了摸索,总结出一套符合班-怒混杂岩带的1∶5万岩性+构造填图理论和方法,并付诸实践。同时研发的"短红外光谱+高精度AMT+高精度磁法+土壤(岩石)地球化学测量"勘查技术方法组合在多个矿床的勘查评价中得到了有效的应用。(4)对班-怒带、冈底斯带新发现、新突破矿床的成岩成矿作用进行了深入研究,完善和丰富了大洋俯冲-大陆碰撞的矿床成矿系列,识别出多种新矿�The four metallogenic belts in Tibet were the products of the long evolutionary progress of the Tethyan Ocean. A series discoveries of super-giant high grade copper-gold deposits belts make the belt not only one of the most important resource reserves, but also the resource security base of China. However, due to the harsh work environment and the lack of research work, many key geological questions remain unsolved. In particular, the geological survey and mineral exploration of the Bangong Co-Nujiang Metallogenic Belt, which is called "the roof of the world ridge", has been seriously restricted. Aim at the above questions, the Institute of Mineral Resources, Chinese Academy of Geological Sciences, in cooperation with 12 universities, institutes, geological exploration units and industries on the focus of "multi-levels from exploitation to research, and to application", by taking the 1:50000 geological survey and integrated study as methods, and aimed to solve the key scientific problems that restrict the breakthrough of prospecting, and achieved a series of significant outcomes as follows:(1) The advanced understandings of the Late Triassic-Early Cretaceous stage evolution of the Tethyan Ocean, based on comprehensively studies of tectonics, sedimentation and magmatic coupling process in the Central Tibetan Plateau that will aid to the future prospecting breakthrough.(2) There are many important research progress including the geology, type, the metallogeny and the preservation condition of the Duolong copper-gold deposit have been defined;the regional metallogenic and exploration model of porphyry-high sulfidation epithermal copper-gold deposit have been established;the understanding on the diagenesis, mineralization and metallogenic regularity of the Duolong copper-gold resources base have been deepened, the prospecting potential of the Duolong copper-gold deposit has been indicated, all of which are shows that Dulong copper-gold deposit is an important national non-ferrous metal reserve base in western Tibet.(

关 键 词：青藏高原 成矿带 斑岩矿床 矿产资源基地 

分 类 号：P612[天文地球—矿床学]