八寨火山角砾岩筒浅表难见金刚石原因分析

摘要

从岩筒地质特征、组成岩石和矿物的成因类型，对岩浆源区温压条件作出判断，并与含金刚石金伯利岩筒对比，认为该区火山角砾岩筒不完全具备金刚石成矿温压条件。%According to the geological characteristics of pipe, rock assemblage and genetic type of mineral, we have identified the T and P conditions of magmatic source area and had a comparison with those of the kimberlite pipe. We think that there aren＇t the enough conditions of diamond metallogenesis in this volcanic pipe area.