河南官坡花岗伟晶岩地质与地球化学特征  

Geological and geochemical characteristics of granitic pegmatite in Guanpo,Henan Province

作　　者：王盘喜[1,2,3] 朱黎宽 刘璐[1,3] 郭俊刚 武秋杰[1,3] 

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心,郑州450006 [3]国土资源部多金属矿评价与综合利用重点实验室,郑州450006

出　　处：《中国地质调查》2017年第6期40-49,共10页Geological Survey of China

基　　金：中国地质调查局"青海祁漫塔格金属矿集区综合地质调查(编号:DD20160073)";"河南卢氏稀有多金属矿地质勘查与综合利用评价(编号:12120113061200)"项目联合资助

摘　　要：河南省官坡镇境内出露大量花岗伟晶岩脉,部分花岗伟晶岩脉发育稀有金属或稀有多金属矿化,具有稀有金属找矿潜力和研究价值。通过野外地质调查、岩相学观察和元素地球化学分析,对官坡花岗伟晶岩的特征和成因进行研究。结果显示:官坡花岗伟晶岩脉具有分布集中、延伸稳定、规模较大、结构带发育完整、物质组成复杂的特点;花岗伟晶岩主量元素具有高硅、富碱、过铝质及低铁、镁、钙和钛的特点,在成因上可能与灰池子花岗岩具有亲缘性,推测是该花岗岩高度演化后的产物。该研究进一步提高了对该区花岗伟晶岩的研究程度,为区内稀有金属矿勘查提供借鉴。Granitic pegmatite veins outcropped widely and some veins developed rare metal or rare polymetal mineralization in Guanpo of Henan Province,which possess great research value and prospecting potential. The authors researched the features and origins of the granitic pegmatite through field geological survey,petrographic observation and element geochemistry analysis. The results show that granitic pegmatite veins have the characteristics of centralized distribution,relatively stable extension,large scale,completely developed structural belt and complicated mineralogy. The granitic pegmatite veins have high silica content,rich alkali and peraluminous,and they also have low iron,magnesium,calcium and titanium content. They may have good affinity to Huichizi granite in the aspect of origin,and thus the authors speculated that they could be the products of the highly evolved granite.This study further improved the research level of the granitic pegmatite,and provided references for the prospecting of rare metal deposits in the study area.

关 键 词：花岗伟晶岩 伟晶岩脉 地球化学特征 

分 类 号：P588.12[天文地球—岩石学] P595[天文地球—地质学]