钾、钙同位素体系定年和示踪的研究进展

doi:10.11867/j.issn.1001-8166.2001.03.0367

地球科学进展 ›› 2001, Vol. 16 ›› Issue (3): 367 -373. doi: 10.11867/j.issn.1001-8166.2001.03.0367

钾、钙同位素体系定年和示踪的研究进展

彭子成,王俊新,刘桂建,张兆峰,贺剑峰

中国科学技术大学地球与空间科学系,安徽合肥 230026

收稿日期:2000-08-22 修回日期:2000-11-01 出版日期:2001-06-01
通讯作者: 彭子成(1939-),男,教授,主要从事环境地球化学研究. E-mail:pzc@ustc.edu.cn
基金资助:
国家自然科学基金项目“大别山超高压变质岩体矿物的钾钙同位素体系研究”(编号:49973011);国家重点基础研究发展规划项目“季风环境的自然变化规律和北方干旱化的历史过程研究”(编号:G1999043401);中科院知识创新工程重大项目“南海珊瑚气候环境信息的提取及其量化研究”(编号:KZCX1-Y-05)联合资助。

PROGESS IN THE DATING AND TRACING RESEARCH BY USING K-Ca ISOTOPIC SYSTEM

PENG Zi-cheng, WANG Jun-xin,LIU Gui-jian,ZHANG Zhao-feng,HE Jian-feng

Department of Earth and Space Sciences,University of Science and Technology of China,Hefei230026,China

Received:2000-08-22 Revised:2000-11-01 Online:2001-06-01 Published:2001-06-01

阐述了K-Ca同位素体系的分离和测定方法,以及对海洋火成岩、大陆和月球花岗岩、碳酸盐岩、化学和碎屑沉积矿物的定年和εCa示踪的研究结果。对比常用的微量元素构成的定年和示踪体系,如Rb-Sr、Sm-Nd、U-Pb,由主量元素K和Ca组成的同位素体系,有其特殊的地球化学行为,以至在岩石成因、物质来源、板块碰撞、壳幔作用、岩体折返等重要的化学地球动力学过程研究中,赋以新的信息和启示。随着测试技术的不断提高,K-Ca同位素体系可在探索相关的地质和环境科学的课题中,发挥积极的推动作用。

关键词: K-Ca体系, 分析测试, 定年研究, 示踪探索

The separation and purification of the K and Ca elements in the mineral and the rocks, dating and tracing marine igneous rocks, continental and lunar granites, carbonates, chemical and clastic sediments by using K-Ca system, were described and discussed in this paper. In comparison with the Rb-Sr, Sm-Nd and U-Th-Pb system, the K-Ca isotopic one has its own geochemical behaviors because K and Ca elements belong to the major ones. As mentioned in the text, the different characteristics between the major and trace element systems were shown in the geological process of petrogenesis, matter origin, plate collision, crust-mantle interaction and subduction/turn back,etc. The K-Ca system has already supplied a series of new information and inspiration. With the technological development, the K-Ca system has becomes a new approach to study chemical geodynamics.

Key words: K-Ca isotopic system, Analytical determination, Dating, Trace investigation.

中图分类号:

P597

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[1]	李朝阳. 对当前矿床地球化学研究的一点认识[J]. 地球科学进展, 1999, 14(6): 549-554.

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