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[1]李永军,李甘雨,佟丽莉,等.玄武岩类形成的大地构造环境Ta、Hf、Th、La、Zr、Nb比值对比判别[J].地球科学与环境学报,2015,37(03):14-21.
 LI Yong-jun,LI Gan-yu,TONG Li-li,et al.Discrimination of Ratios of Ta, Hf, Th, La, Zr and Nb for Tectonic Settings in Basalts[J].Journal of Earth Sciences and Environment,2015,37(03):14-21.
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玄武岩类形成的大地构造环境Ta、Hf、Th、La、Zr、Nb比值对比判别(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第37卷
期数:
2015年第03期
页码:
14-21
栏目:
基础地质与矿产地质
出版日期:
2015-05-15

文章信息/Info

Title:
Discrimination of Ratios of Ta, Hf, Th, La, Zr and Nb for Tectonic Settings in Basalts
文章编号:
1672-6561(2015)03-0014-08
作者:
李永军李甘雨佟丽莉杨高学王冉
1. 长安大学 地球科学与资源学院,陕西 西安 710054; 2. 长安大学 西部矿产资源与地质工程教育部重点实验室,陕西 西安 710054
Author(s):
LI Yong-jun LI Gan-yu TONG Li-li YANG Gao-xue WANG Ran
1. School of Earth Science and Resources, Chang’an University, Xi’an 710054, Shaanxi, China; 2. Key Laboratory of Western Mineral Resources and Geological Engineering of Ministry of Education, Chang’an University, Xi’an 710054, Shaanxi, China
关键词:
玄武岩Ta/HfTh/TaTh/HfNb/ZrTh/NbLa/Nb比值判别构造环境
Keywords:
basalt Ta/Hf Th/Ta Th/Hf Nb/Zr Th/Nb La/Nb ratio discrimination tectonic setting
分类号:
P595
DOI:
-
文献标志码:
A
摘要:
玄武质岩浆见于板块构造演化的全过程和各个重要阶段,是所有火成岩中最主要的构造地球化学指示剂,因此,玄武岩类相关元素图解和比值成为研究火成岩成岩作用和形成构造环境判别的首选对象。Ta、Hf、Th、La、Zr、Nb都是高场强元素和较强不相容元素,由于地球化学性质的相似性和在玄武岩类成岩过程中的规律性变化,所以它们是玄武岩类成因研究和构造环境判别图解中使用频率最高的元素,而且两两元素含量之间的比值能较好地区分其形成时的构造环境。在前人发明的玄武岩类Th/Hf-Ta/Hf、Th/Zr-Nb/Zr及La/Zr-Nb/Zr双对数判别图解基础上,运用这6个元素两两组对的Ta/Hf、Th/Ta、Th/Hf、Nb/Zr、Th/Nb、La/Nb值,建立比值判别表,极好地区分了几乎最常见的各种构造环境中有关的玄武岩类。该比值判别表是对双对数判别图解的极好补充。
Abstract:
Basaltic magma, which is found in whole process of plate tectonic evolution and the critical stages, is a most important tectonogeochemical indicator in all igneous rocks. Therefore, the diagrams and ratios of related elements in basalts become the first choice to investigate the igneous diagenesis and tectonic setting. Ta, Hf, Th, La, Zr and Nb, which are high-field strength elements and stronger incompatible elements, have similar geochemical properties and regular changes in basaltic diagenesis, thus, they are most frequently used in basalt genesis and discrimination diagrams of tectonic setting. Moreover, the ratios of contents between the each one of elements can better distinguish the tectonic settings of formation. Based on the double-log discrimination diagrams of Th/Hf-Ta/Hf, Th/Zr-Nb/Zr and La/Zr-Nb/Zr in basalt yielded by previous research, the ratios of Ta/Hf, Th/Ta, Th/Hf, Nb/Zr, Th/Nb, La/Nb values were proposed to distinguish the basalts in various common tectonic settings, and the ratio discrimination table was put forward. The table extremely distinguishes basalt in most common variety of tectonic environments and is a great supplement for the double-log discrimination diagrams.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-02-02
基金项目:国家自然科学基金项目(41273033,41202044,40534020)
作者简介:李永军(1961-),男,甘肃天水人,教授,博士研究生导师,理学博士,E-mail:yongjunl@chd.edu.cn。
更新日期/Last Update: 2015-05-27