成矿系列研究问题

SOME PROBLEMS ON THE STUDY OFMETALLOGENIC SERIES

成矿系列研究正处于兴起阶段。研究成矿系列的思路是:以区域构造一地球化学为环境背景,以构造-成岩-成矿为统一体系,以矿床的时空演化为主线,探讨成矿系列的形成、分布和演化规律。成矿系列的结构指各矿床类型间的时间、空间、物质和成因上的联系,包括“共生性”、“连续性”、“分带性”、“重叠性”、“过渡性”和“互补性”。研究这些性质有重要的理论和实际意义。不同成矿时代生成的成矿系列间存在复合关系。成矿系列的复合是产生“多成因、多矿源、多阶段矿床”的重要原因。我国大地构造具多旋回特点,因而成矿系列复合具有普遍意义。

This paper discusses mainly three problems : 1. How to study the metallogenic series? According to the author's experience, the study of the metallogenic series should be based on the comprehensive study of the regional tectonic, magmatism, sedimentation and ore-formation, The spatio-temporal distribution and evolution of different metallogenic series are the main subjects of this study. The development trend of this study is to establish the geologic-dynamic model of the formation of the metallogenic series. The aim of this research is the predication of unknown mineral deposits. 2. The structure of the metallogenic series is the relationship among the different types of mineral deposits which exist in a metallogenic series. Based on the research works on many ore deposits in Eastern China, the author have propounded six main relationships : (1) co-existence. (2) continuum, (3) zoning, (4) superposition, (5) transitivity and (6) compensation. These relationships are of great significance both theoretically and practically. 3. Compounding of metallogenic series, which is made up of two or more combined metallogenic series, is one of the outstanding features of the Eastern China Metallogenic Province. For example, in the Dabaoshan Orefield. Guangdong Province, the Paleozoic sedimentary Fe-S-Cu metallogenic series and the Mesozoic (Yanshan Epoch) magmatic-hy-drothermal W-Mo metallogenic series are compounded. So that the composite ore deposits are wide spread in this region.