关键词: 金矿, 重砂异常, 形成机理, 找矿意义, 秦巴地区

Abstract:

Heavy mineral method is an ancient and effective prospecting method, it had been adopted since two thousand years ago. This paper based on Qinba’s primary gold deposits, placer gold deposits and gold heavy minerals data, analyzes goldbearing minerals, gold particle size, grade, and texture from placer gold deposit, primary gold deposit and gold heavy minerals, uses physical and chemical transportation, sedimentary mechanism to study the relation between flow speed and debris or natural gold particle size under water dynamics, formation, decomposition and sedimentary process of gold complex in oxidized environment or in chloride ion solution, and discusses the relation between gold minerals anomaly and gold deposits (goldbearing geological units), and classifies gold minerals anomaly types, providing references for predicting gold types.

Key words: gold deposit, heavy minerals anomal, formation mechanism, indication, Qinba area