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在适当的古地理、古气候条件下,沉积作用可以形成具有一定层位或岩相的同生铜矿化,分布于面积广大的成矿带中,如我国的川滇铜矿带.区域变质往往在同生沉积的基础上,迭加以不同程度的“变质热液”改造,使其具有外生层状为主、“内生”脉状为辅的双重特征,表现出复杂的面貌.氧化作用导致部分铜质的淋滤,当氧化速度稍大于剥蚀速度时,也能形成铜的氧化矿床.次生富集作用则可使贫矿变富,增加其工业意义.
Under proper palaeogeography and palaeoclimate conditions, sedimentation can form a copper mineralization with some layers or lithofacies, which are distributed in a large area of metallogenic belt, such as the Sichuan-Yunnan copper belt in China. Often in the same deposition on the basis of the superposition of varying degrees of “metamorphic hydrothermal ” transformation, so that it has a mainly exogenous stratigraphic, “endogenous ” vein-like double features, showing complex Oxidation leads to partial leaching of copper, which also forms oxidized copper deposits when the oxidation rate is slightly greater than the rate of denudation. Secondary enrichment can enrich lean ore and increase its industrial significance.