玄武岩类形成的大地构造环境的Th／Hf—Ta／Hf图解判别

汪云亮 张成江 等

玄武岩类形成的大地构造环境的Th／Hf—Ta／Hf图解判别

汪云亮张成江等

- 汪云亮（成都理工学院三系,成都,610059）　　　　　　张成江（成都理工学院三系,成都,610059）　　　　　　修淑芝（成都理工学院三系,成都,610059）
基金项目:
本文为四川省地学核技术重点实验室开放基金项目(HD-01)研究成果之一.

修回日期: 2000-07-14

刊出日期: 2001-08-31

Th/Hf-Ta/Hf identification of tectonic setting of basalts

WANG YunLiang,ZHANG ChengJiang and XIU ShuZhi3th Department of Chengdu University of Technology,Chengdu 610059,China

Revised Date: 14 July 2000

Publish Date: 31 August 2001

摘要

摘要: Th,Ta,Hf是一组耐熔强亲岩浆元素，由于地球化学性质的相似性，其相互之间的比值关系能将深部作用的地球化学过程较好地恢复出来，玄武岩类，是原始玄武岩浆形成的岩石的Ta/Hf及Th/Hf比值，能较好地反映其源区的Th,Ta,Hf之间的分异特征，在一般情况下，这一特征与某种确定的大地构造环境有密切关系和确定的因果联系，可用来判别玄武岩类形成的大地构造环境及其源区Th,Ta,Hf分异特征，本文根据典型大地构造环境玄武岩类的Th,Ta,Hf数据，提出了玄武岩类形成的大地构造环境判别的Th/Hf-Ta/Hf双对数图及判别方法。
- 玄武岩 /
- 大地构造环境 /
- Th／Hf－Ta／Hf判别图 /
- 花岗岩 /
- 岩浆岩 /
- 岩浆源区 /
- 钍／铪－钽／铪判别图
Abstract: Th, Ta and Hf are refractory strong magmatophile elements. Because that the geochemical behavior of Th, Ta and Hf is similar during magmatic action, the ratios of Th, Ta and Hf could restore processes of mantle partial, magmatic fractional crystallization, mantle fractionation and so on. The Th/Hf and Ta/Hf ratios of basalts, especially primary one, reflect the differentiation of Th, Ta and Hf of its source region. In general, there is a close relationship between these characteristics and tectonic setting. Based on the ratios among Th, Ta and Hf of basalts formed from typical tectonic setting of the world, we propose a new tectonic identification scheme of basalts on the Th/Hf and Ta/Hf double logarithmic plot.
- Basalt /
- Tectonic setting /
- Th/Hf Ta/Hf identification diagram. /

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玄武岩类形成的大地构造环境的Th／Hf—Ta／Hf图解判别

Th/Hf-Ta/Hf identification of tectonic setting of basalts

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