A comparative review of magnesium isotope analysis methods for emerging geological applications:Double-spike vs.standard-sample-bracketing  

作　　者：Yi-Bo ZHAO Wen-Ning LU Jian-Bing XU Ming-Xing LING 

机构地区：[1]National Key Laboratory of Uranium Resource Exploration-Mining and Nuclear Remote Sensing,East China University of Technology,Nanchang,330013,China [2]State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang,330013,China [3]School of Earth Sciences,East China University of Technology,Nanchang,330013,China

出　　处：《Science China Earth Sciences》2025年第4期1213-1222,共10页中国科学(地球科学英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.42103016&42173024);the State Key Laboratory of Nuclear Resources and Environment(Grant No.2020Z20);the National Key R&D Program of China(Grant Nos.2021YFC2901705&2023YFC2906601);the Jiangxi Double Thousand Plan(Grant No.DHSQT22021005);the Doctoral Grant from East China University of Technology(Grant Nos.DHBK2020011&DHBK2019290)。

摘　　要：Given the significant isotopic information in nature,magnesium(Mg)isotopes have played a pivotal role in elucidating the underlying mechanisms of environmental and geological processes.Along with the advancement of multicollector inductively coupled plasma mass spectrometry(MC-ICP-MS),the application of the standard-sample-bracketing(SSB)method,especially the recently developed double-spike(DS)method in Mg isotopes,has significantly enhanced precision to levels as low as±0.03‰(2SD).This review primarily focuses on the comparative analysis of the above two methods,with special attention given to the DS method and its application in investigating intricate lithospheric processes with subtle Mg isotope fractionations.We first introduce the development of Mg isotopic analysis,followed by a detailed description of the basic principles of the SSB and DS methods.Subsequently,a comparative discussion of these two approaches is presented to assist researchers in choosing the preferred strategy for specific natural samples.Furthermore,we carefully discuss the more precise scales of equilibrium inter-mineral Mg isotopic fractionations through the DS method,emphasizing that with improved precision,a broader range of applications may emerge.This review ends with our insights and perspectives on this compelling topic,aiming to provide guidelines for advancing Mg isotopic analysis and inspiring researchers to explore various geo-environmental phenomena.

关 键 词：Mg isotopes Analysis methods Standard-sample-bracketing Double-spike Geological applications 

分 类 号：P597[天文地球—地球化学]