摘要
历经４０多年的各种地质调查和普查勘探，云南硫化物型铜镍和铂族矿产的地质情况已比较清楚。它们绝大多数都产在铁质超镁铁岩中，少数产于镁铁岩中，是一种与铁质超镁铁岩和镁铁岩有密切成因联系的岩浆矿床。岩浆活动时期属华力西期。岩体和矿床是在一种相对比较稳定的张性环境中，由地幔分熔的岩浆，在深部岩浆房中进行分异后，沿深断裂一次或多次上侵至浅部，在上侵过程中和在浅部岩浆房中又进行了分异冷凝而形成。一般以镁铁质－超镁铁质复合杂岩体成矿较好，分异好者成富矿。
Abstract The geological situations of sulphide Cu-Ni and Pt mineral resources in Yunnan are shown clear by the various geological investigation, prospecting and exploration in more than 40 years. Most of them are occurred in Fe ultramafic rocks and a few of them are in mafic rocks. They are magmatic ore deposits closely related to Fe ultramafic or mafic rocks in genesis and the period of magmatic activity is Variscan, The rock bodies and ore deposits were formed by the anatexis magma from the mantle, which differentiated in the deep chamber, then rose up one time or more along the deep fault, re-differentiated in the rising and the upper chamber and condensed in the relatively stable and tensile environment. Generally speaking, the metallogenesis of mafic--ultramafic complex is better than those of others, and the good differentiation one could form the rich orebody whereas the bad one only formed the poor.
出处
《云南地质》
1999年第1期22-25,共4页
Yunnan Geology
