西藏拿若铜矿床安山岩元素地球化学特征研究

何阳阳; 温春齐; 刘显凡

doi:10.13568/j.cnki.651094.2018.02.002

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西藏拿若铜矿床安山岩元素地球化学特征研究

更新时间：2026-01-21

- 西藏拿若铜矿床安山岩元素地球化学特征研究
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 35, Issue 2, Pages: 131-136(2018)
- 作者机构：
  
  1. 内江师范学院地理与资源科学学院
  2. 成都理工大学地球科学学院
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.2018.02.002
  CLC： P618.41
- Published：2018
- 稿件说明：
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[1]何阳阳,温春齐,刘显凡.西藏拿若铜矿床安山岩元素地球化学特征研究[J],2018,35(02):131-136.
[1]何阳阳,温春齐,刘显凡.西藏拿若铜矿床安山岩元素地球化学特征研究[J],2018,35(02):131-136. DOI： 10.13568/j.cnki.651094.2018.02.002.

DOI：10.13568/j.cnki.651094.2018.02.002.

摘要

产于拿若矿区美日切错组地层中的安山岩对矿床的形成及成因认识具有重要作用

笔者选择4件安山岩样品

测试其主量元素、稀土元素及痕量元素组成.研究表明

拿若安山岩具有大离子亲石元素K、Th、Rb相对富集

高场强元素Ta、Nb、Ti相对亏损

轻稀土元素相对富集

重稀土元素相对亏损的特点

属于高钾钙碱性系列

形成于大陆弧环境

安山质岩浆来源于MORB型亏损地幔.拿若矿区出现小岩体成大矿的现象

且具有多不杂铜矿床相似的成岩成矿环境以及相近的成岩成矿年龄

同样满足地幔流体作用成矿的条件

初步揭示出地幔流体作用导致壳幔物质混染叠加成矿的成因机制.

Abstract

The discovery of the Naruo copper deposit in the Duolong ore deposit area of Tibet is another major breakthrough in the geological prospecting work. The andesite in the meiriqiecuo formation of the mining area plays an important role in the formation and genesis of the deposit. 4 samples of andesite were selected to test the main elements

rare earth elements and trace elements. The results show that Naruo andesite has the relative enrichment of K

Th and Rb and the relative loss of high field strength elements Ta

Ti. The relative enrichment of LREE and the relative loss of HREE. It belongs to high-k calc alkaline series and formed in the continental arc environment. Andesitic magma derived from MORB depleted mantle. In the Naruo mining area

a small rock mass becomes a large ore. It is similar to the diagenetic and metallogenic ages of the Duobuza copper deposit. It also satisfies the conditions of mantle fluid mineralization

and preliminarily reveals the mechanism of mantle fluid interaction leading to the crust mantle material mixed and superimposed mineralization.

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