陕西安康砂金矿物特征及地质找矿意义

通过对陕西安康地区大量砂金矿物的形态、显微结构及化学成分特征的研究,发现全区砂金按成色可明显划分为北、中、南三个分区,并与地质背景相印证;在形态特征上以其特有的镶嵌结构、蜂窝状结构及晶洞状结构等标型特征与原生自然金相区别。并总结出砂金矿物的不同形态、成色特征和空间变化及所反映的地质找矿意义。

MINERALOGIC CHARACTERISTICS AND EXPLORATION SIGNIFICANCE OF PLACER GOLD IN ANKANG,SHANXI

Based on the morphology,microscopic texture and chemical contents of placer gold with respect to the quality the area of Ankang can be divided into north,central and south subregions corresponding with their own geologic background. The placer gold is characterized by the mosaic, honeycomb and geode structure,and distinguished from the primary natural gold. Meanwhile,the relationship between morphologic and quality features and distribution with exploration significance of placer gold is also summarized.