挪威中部双峰态火山岩系地质,地球化学特征及其成因
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

P588.14

基金项目:


Geology,Geochemistry and Genesis of the Bimodal Volcanic series in Central Norway
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    挪威中部Gjersvik地区加里东造山带由一系列地体组成。Gjersvik地体内的火山岩系具有明显的双峰态特征,主要由深色和浅色拉斑玄武质绿岩以及石英角斑质火山碎屑岩组成。火山活动分为三个阶段,各阶段火山活动特征与裂谷构造演化息息相关。地质和地球化学证据表明,裂谷演化早期形成来源于亏损地幔未分异型拉斑玄武岩,中期形成由玄武岩或辉长岩局部重熔产生的长英质火山岩,晚期则形成来源于更深部的富集地幔分异型拉斑玄武岩。Gjersvik地体内已发现一系列的与火山活动有关、空间上与长英质火山碎屑岩紧密共生的块状硫化物矿床。

    Abstract:

    The Caledonian orogenic belt in Gjersvik area of Central Norway is composed of a series of terranes,and the volcanic rocks in the Gjersvik terrane consisting mainly of dark and light-colored tholeiitic greenstone and quartz keratophyric pyroclastic rocks exhibit an obvious bimodal pattern.Volcanic activities can be divided into three stages which were closely asso-ciated with the evolution of rift structure. Undifferentiated tholeiite derived from the depleted mantle was formed at the early stage of rift evolution,felsic volcanic rocks from partial melting of basalt or gabbro were produced at the middle stage,and differential tholeiite derived from the deeper enriched mantle came into being at the late stage.A series of massive sulfide deposits have been found within the Gjersvik terrane,which were related to volcanic activities and are spatially in close association with felsic pyroclastic rocks.Studies show that the formation of these deposits was related to the submarine hydrothermal system accompanying the volcanic activity.

    参考文献
    相似文献
    引证文献
引用本文

孙海田,F. M. Vokes, A. Reinsbakken,1994,挪威中部双峰态火山岩系地质,地球化学特征及其成因[J].岩石矿物学杂志,13(1):42~50. Sun Haitian,1994,Geology, Geochemistry and Genesis of the Bimodal Volcanic series in Central Norway[J]. Acta Petrologica et Mineralogica,13(1):42~50.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期:
  • 出版日期: