贵州罗甸和田玉的矿床成因与成矿规律

Genesis and Metallogenic Regularities of Luodian Nephrite Deposit in Guizhou Province

摘要:

贵州省罗甸县首次发现的大型和田玉矿床，是我国和田玉找矿勘探历史上的重大发现和新突破。已有研究表明该矿床与国内外已知和田玉矿床相比均具有明显的特殊性和差异性。为揭示该矿床成因新类型，通过贵州罗甸和田玉围岩、岩浆岩体及矿体岩石地球化学和稳定同位素分析方法，确定成矿所需Si及Ca的来源，综合矿区地质特征、成矿物质来源和成矿物理化学条件研究，确定矿床成因，建立成矿模式，从而为合理开发利用罗甸和田玉矿床及在邻区开展和田玉矿床成矿预测、找矿勘探和开发利用提供科学依据。

Abstract:

The large nephrite deposit recently discovered in Luodian， Guizhou Province represents a major breakthrough in the exploration history of nephrite in China. Previous studies have shown that this deposit has obvious particularity and difference compared with other known nephrite deposit， both domestically and internationally. To reveal the new genetic type of the deposit， this paper analyzes the source of Si and Ca essential for mineralization. By integrating the geological characteristics of the mining area with the sources of metallogenic materials and the physicochemical conditions of mineralization， the deposit’s genesis was determined， and a metallogenic model was established. This provides a scientific basis for the rational exploitation of the Luodian nephrite deposit and supports mineralization prediction， exploration， and development of nephrite deposits in neighboring areas.