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 mu...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.展开更多
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)+1 种基金the National Key R&D Program of China(Grant Nos.2021YFC2901705&2023YFC2906601)the Doctoral Grant from East China University of Technology(Grant Nos.DHBK2020011&DHBK2019290)。
文摘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.
