摘要
本文根据滇西陆壳演化的历史，论述了滇西铀矿在矿化类型，成矿时代及空间分布等地质特征，总结了铀成矿的规律。认为板块敛合边界上的古岛孤带（或山孤带）是铀成矿最有利的地质环境。铀矿田明显的分布于壳内构造的硅镁层凹陷带及区域大地热流值的异常区，同时，区域性断裂及其次级构造控制了铀矿田及矿床的产出部位。滇西铀矿的三个矿化期正好与三个微板块的碰撞、拼合和陆壳发育的时期相一致。
The geological characteristics such as mineralization type, metallogenetic time and regional distribution ,etc. of U ore deposits in West Yunnan are discussed and the metallogenetic law of them is summarized according to the evolution history of the continental crust in West Yunnan in this paper. We believe that the palaeo-island are zone along the plate convergence boundary is the most favourable geological environment of the U metallogenesis. The U ore field is obviously distributed in the sima depression belt within the crust structure and in the area with regional geothermal anomalous value. And the regional fault and its subsidiary structure control the occurrence location of the U ore field and deposit. The three U metallogenetic periods in West Yunnan are just consistent with those of the collision, matching of three microplates and the development of continent ctust.
出处
《云南地质》
1995年第2期109-118,共10页
Yunnan Geology
