含金热液隐爆角砾岩的特征及研究意义

含金热液隐爆角砾岩可划分为岩浆热液隐爆角砾岩、岩浆一天水混合热液隐爆角砾岩和天水热液隐爆角砾岩。隐爆角砾岩最重要的特征为：形似厚板状、筒状，角砾岩中含有大量岩粉，矿物的快速沉淀。热液体系的减压扩容、流体的沸腾和去气（ＣＯ２）作用引起了隐爆角砾岩化．金常富集在隐爆中心附近。对隐爆角砾岩的研究将有助于判断金矿体的剥蚀程度、矿头和矿尾的位置，有助于布置勘探工程，有助于对金沉淀机制的研究和深部预测。

CHARACTERISTICS AND STUDY SIGNIFICANCE OF GOLD-BEARING HYDROTHERMAL CRYPTOEXPLOSION BRECCIAS

The gold-bearing hydrothermal cryptoexplosion breccias can be divided into three types ofmagmatic water,precipituted water,and mixed water. The important characteristics of cryptoexplosionbreccias are as a thick platy or tubular body,to contain a great quantity of rock meal in cryptoexplosion breccias,and to have a high-speed precipitation of minerals. The depressure and dilation of the hydrothermal system ,and the boiling and scavenging of the fluid resulted in cryptoexplosive brecciation.Gold is often concentrated in the vicinity of the cryptoc.xplosion centre. The study of cryptoexplosionbreccias will help people determine the denuded extent of a gold body .and the head and tail of the orebody,and will benefit the research on the gold precipitating mechanism and ore prospecting in depth.