峨眉山高钛玄武岩物源的不均一性研究

被引:6
作者
严再飞 [1 ]
黄智龙 [1 ]
程礼军 [2 ]
许成 [1 ]
陈觅 [3 ]
机构
[1] 中国科学院地球化学研究所矿床地球化学国家重点实验室
[2] 重庆煤田地质研究所
[3] 中国科学院研究生院
关键词
高钛玄武岩; 部分熔融程度; 结晶分异; Pb同位素; 源区不均一;
D O I
10.19719/j.cnki.1001-6872.2007.04.010
中图分类号
P588.145 [];
学科分类号
摘要
对二滩地区高钛玄武岩物源研究表明,该区岩石可分为高钛-1和高钛-2两种岩石类型。其反映了二滩高钛玄武岩浆物源的不均一性,这种不均一性主要表现在:1)微量元素Zr,Sr含量明显不同;2)部分熔融程度和熔融压力不同;3)岩浆的结晶分异不同;4)Pb同位素比值不同。这可能是深源地幔柱(来自核-幔边界或下地幔)在上升过程中携带的不同物质发生部分熔融所致。
引用
收藏
页码:60 / 65
页数:6
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