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考查长江中下游玢岩铁矿围岩蚀变的地质条件,充分研究矿化蚀变的矿物平衡,交代作用中的化学组分和矿物相的关系及矿物组成和结晶习性(类质同象和同质多型)在蚀变分带中的演化,是一个由表及里、由此及彼和去伪存真地认识事物本来面目的过程。这里,就是在这个基础上探讨蚀变分带的形成机理:首先发现蚀变作用中存在浓度梯度和
Examining the geological conditions of wall rock alteration in the Yan rock in the middle and lower reaches of the Yangtze River, fully studying the mineral balance of mineralization and alteration, the relationship between chemical composition and mineral facies, and mineral composition and crystallization habit Homomorphic polygamy) in the evolution of alteration zoning is a process by which we can know the true nature of things from the perspectives of both ourselves and ourselves. Here, it is on this basis to explore the formation mechanism of alteration zoning: First, we found that there is concentration gradient in the alteration and