福建同安角闪辉长岩的矿物化学、40Ar-39Ar年龄及地质意义

被引：11

作者：

陈荣

周金城

机构：

[1] 南京大学地球科学系,南京大学地球科学系南京大学成矿国家重点实验室,,南京大学成矿国家重点实验室,

来源：

地质论评 | 2001年 / 06期

关键词：

(40)Ar-(39)Ar年龄; 矿物化学; 角闪辉长岩; 同安; 福建;

D O I：

10.16509/j.georeview.2001.06.012

中图分类号：

P588.124 [];

学科分类号：

摘要：

福建同安角闪辉长岩的岩石化学成分具有低MgO高铝玄武岩的特征,其中的角闪石是富钙钙镁闪石,斜长石是An=91～95的钙长石。在基性的弧岩浆中,低MgO高铝玄武岩浆富水是导致结晶出高钙斜长石的关键因素。钙镁闪石的40Ar-39Ar年龄为129.62±0.15Ma,说明同安角闪辉长岩是东南沿海早白垩世“初始引张阶段”岩浆活动的产物。

引用

页码：602 / 607

页数：6

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