中国东北部陆缘成矿地质背景与有色金属贵金属成矿系统划分

中国东北部陆缘区是古亚洲洋构造域与滨太平洋构造域叠加复合部位.区内构造、岩浆与成矿作用复杂,是我国重要的有色金属、贵金属矿产地之一.在总结研究该区成矿地质背景和成矿特征的基础上,运用成矿系统理论,划分了区内有色金属、贵金属成矿系统类型.

GEOLOGICAL BACKGROUND AND METALLOGENIC TYPES OF NONFERROUS AND NOBLE METAL RESOURCES IN THE EPICONTINENTAL LITHOSPHERE IN NORTHEAST CHINA

The epicontinental region of Northeast China in the compounding part of Paleo-Asia Ocean and marginal-Pacific tectonic domain, where the tectonics and magmatism were intensively developed, is one of the significant sources for nonferrous and noble metal deposits of the country. Based on a detailed study on geology, geochemistry and metallogenic background of typical ore deposits, combining modern metallogenic theories, a classification system is established for the nonferrous and noble metal ores in the region. Through the division to the tectonic elements and the establishment of evolving sequence of regional tectonic thermal events, four stages of the regional tectonic evolution are recognized. The mineral resources of nonferrous and noble metals richly conserved in the region are generally classified into two systems, i.e. the simple metallogenic system and the compounding metallogenic system, which are further divided into various subsystems under different tectonic backgrounds.