广西河塘岩体地质地球化学特征及成矿作用

河塘杂岩体的组成由早而晚为:早期侵入相石英闪长岩→主体侵入相花岗闪长岩→补充侵入相二长花岗岩.岩石化学体现出由基→酸的变化规律;稀土配分模式形态相似,Eu轻、中亏损,反映了杂岩体各类岩石之间成因上不可分割的内在联系.在岩体及接触带主要形成Au、Cu、Fe多金属矿化,表现为具有两类不同性质的成矿作用,即岩浆自源成矿作用和岩浆他源成矿作用,并共同构成一个时空上规律组合的成矿系统.

GEOLOGICAL-GEOCHEMICAL CHARACTERISTICS AND METALLOGENESIS OF HETANG ROCK BODY, GUANGXI

Hetang complex rock body is composed, from early to late, of early intrusive quartz diorite, main intrusive granodiorite and late intrusive monzonitic granite. Its petroehemistry is characterized with the variation from basic to acid. The REE distribution patterns are similar to each other, i. e. , the Eu is weak to moderate depletion, which reflected the indivisible genesis interrelationship among all rock types of the complex body. Mineralization of Au, Cu and Fe is mainly formed within the rock body and the contact zone. There are two different ore - formations, the magma hydrothermal mineralization and the superimposition-reformed mineralization, which constitute a regular ore-forming system in time space.