摘要
磷灰石广泛分布于各类岩石和矿石中,是岩浆-热液过程中的贯通矿物,其晶格能容纳不同含量和价态的硫元素。磷灰石的硫元素含量在约束岩浆氧逸度、估算母岩浆硫元素含量等方面已初步得到应用。近年来随着二次离子质谱(SIMS)和激光剥蚀多接收电感耦合等离子体质谱(LA-MC-ICP-MS)技术的发展,磷灰石微区原位硫同位素分析有助于进一步识别传统整体分析方法无法区分的成岩成矿信息,更加准确地示踪成岩成矿过程中硫的来源和氧化还原环境变化等。本文对比了SIMS和LA-MC-ICP-MS测定磷灰石硫同位素的分析方法,总结了磷灰石硫同位素在岩浆系统和沉积矿床研究中的应用,并展望了磷灰石微区原位硫同位素分析在地质学研究领域的应用前景。
Apatite is a ubiquitous accessory mineral in different types of rocks and mineral deposits,demonstrating remarkable persistence throughout the entire magmatic-hydrothermal process.The variability of sulfur concentration and the valence state occupying the crystal lattice could be influenced by relatively oxidizing conditions.The concentration of sulfur in apatite was initially applied in constraining the oxygen fugacity of magma and estimating the sulfur content of the parental magma.In recent years,with the development of in situ microanalysis techniques for sulfur isotopic ratios in apatite using Secondary Ion Mass Spectrometry(SIMS)and Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometry(LA-MC-ICP-MS),rapid analysis of apatite sulfur isotopes with high spatial resolution has become feasible.Compared to the traditional bulk analysis,the in situ analytical method eliminates the need for lengthy purification process and improves the efficiency of analyses.The in situ microanalysis of S isotopes in apatite has revealed the inter-and intra-crystalline isotopic variations of mineral grains on the scale of tens of microns,providing critical evidence for addressing geological problems such as formation and mineralization of rocks.This study reviewed recent advancements in methods for in situ microanalysis of S isotopic ratios in apatite using SIMS and LA-MC-ICP-MS,along with their geological applications.
作者
孟书元
陈蕾
杨莉
李秋立
刘宇
唐国强
凌潇潇
杨波
李献华
MENG ShuYuan;CHEN Lei;YANG Li;LI QiuLi;LIU Yu;TANG GuoQiang;LING XiaoXiao;YANG Bo;LI XianHua(School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;MNR Key Laboratory for Exploration Theory&Technology of Critical Mineral Resources,China University of Geosciences(Beijing),Beijing 100083,China;Mining Research Institute of Baotou Steel(Group)Corp.,Baotou 014060,China;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014060,China;State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《岩石学报》
北大核心
2025年第7期2539-2551,共13页
Acta Petrologica Sinica
基金
“战略性关键金属”重大研究计划集成项目(92262303)
国家重点研发计划项目(2023YFF0804200)
白云鄂博稀土资源研究与综合利用全国重点实验室项目(GZ-2023-1LH-001/002)
中央引导地方科技发展资金项目(24ZYQF001)联合资助.
