喜马拉雅构造-成矿域及其成矿效应初步分析

通过近年来的研究 ,提出了全新的喜马拉雅构造 -成矿域概念。从大喜马拉雅构造域及其成矿效应出发 ,通过构造域对矿集区的控制作用、成矿时代、成矿物质来源、深部过程与成矿效应的分析 ,从而较全面地评价了青藏高原及邻区的资源潜力和需要进一步工作的重要成矿带或矿集区。通过分析认为喜马拉雅构造 -成矿域内强烈的壳幔物质交换 ,下地壳翻天覆地的物质和流体交换 ,导致了在同一构造地质单元内可以有一个或多个超大型矿床的存在。并对多个重要矿床类型提出了更切合实际的观点 ,如西藏甲马铜钼银铅锌金多金属矿床属于矽卡岩 -斑岩复合型 ,云南羊拉铜钼金多金属矿床也属于矽卡岩 -斑岩复合型矿床等。在喜马拉雅构造域内形成的燕山晚期或喜马拉雅期矿床大多和大陆地壳深部复杂的动力学过程有关 ,所形成的矿床矿物组合及成矿元素组合复杂 ,特别是矿石中钴、银元素含量较高 ,许多矿床中银、钴已经作为主要成矿元素。最后明确提出了青藏高原主体及东缘重要矿集区的资源潜力

PRELIMINARY ANALYSIS ON HIMALAYAN TECTONIC-METAL-LOGENETICDOMAIN AND ITS MINERALIZATION EFFECT

Through the research in recent years, this paper put forth a fire new notion about Himalayan tectonic metallogenetic domain. Proceeding from Himalayan tectonic metallogenetic domain and its mineralization effect.Through studying the control effect of the tectonic metallogenetic domain on ore accumulation area, metallogenetic epoch, metallogenetic substance sources, plutonic processing and mineralization effect, we comprehensively evaluate the mineral resource potential of Qinghai Tibet Plateau and its adjecent area,and the important mineralization belts or ore accumulation area in which much more work needs to be done.We considered that the substance exchange between mantle and lower crust in Himalayan tectonic metallogenetic domain can produce one or several supper large deposits in a tectonic belt.Meanwhile ,the paper put forward some new practicable viewpoints for some important mineralization types,such as the Jama Cu Mo multimetal ore in Tibet and and the Yangla Cu Mo Au multimetal ore in Yunnan Province,which may belong to skarn pophyry type deposits.Most deposits formed in Himalayan tectonic metallogenetic domain in the Late Mesozoic and Cenozoic could be related to deep complicated dynamic process in Himalayan continental crust. The associations of mineral and metallogenic elements in those ore deposit are complex,characterized by high content of cobalt and silver in ore,which occurred as major mineralized elements in some deposits. Finally, the paper proposed the mineral resource potential of Qinghai Tibet Plateau and the important ore accumulation area in its eastern region.