中蒙边境及邻区典型斑岩型铜矿地球化学特征概述

依据前人对中蒙边境各典型斑岩型铜矿床的研究成果,对中蒙边境古亚洲洋成矿域内典型斑岩型铜矿床的含矿岩体进行了地球化学探讨,结果表明:1)区内岩石属于钙碱性-高钾钙碱性系列、低铝质岩石;2)岩石均呈现出轻稀土富集的右倾型模式,重稀土分布平坦,岩石矿化蚀变后出现明显的负Eu异常,同位素结果表明均来自地幔的部分熔融;3)区内矿床均形成于岛弧环境,矿床的形成具有多期、多源、多构造变化特征,是特定时期地壳演化阶段构造-岩浆-热液活动的产物.通过对中蒙边境典型斑岩铜矿床地球化学的探讨,以期为区内斑岩型铜矿床的找寻和评价提供参考.

Geochemical Features of the Typical Porphyry Copper Deposits in China-Mongolia Border and Its Neighbor Areas

According to the study on the porphyry copper deposits in China-Mongolia border region,the authors try to summarize and study the typical porphyry copper deposits in the Paleoasian metallogenic domain through geochemistry method.It is sugeested that: 1) the rocks in the region belonged to the series rocks of calc-alkaline to high-K calc-alkaline and low-aluminium.2) The rocks showChondrite-normalized REE patterns are oblique to right side and enriched in LREE,flat HREE distribution patterns with obvious Eu...