Li同位素示踪作用及其在凝灰岩鉴别中的应用  

Lithium isotope tracing and its application in tuff identification

作　　者：刘佳宜 刘全有 朱东亚[1,2] 孟庆强 李鹏[1,2] 梁新平 LIU Jia-yi;LIU Quan-you;ZHU Dong-ya;MENG Qing-qiang;LI Peng;IANG Xin-ping(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 102206,China;Research Institute of Petroleum Exploration and Production,SINOPEC,Beijing 102206,China;Peking University,Beijing 100871,China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京102206 [2]中国石化石油勘探开发研究院,北京102206 [3]北京大学,北京100871

出　　处：《天然气地球科学》2021年第4期529-539,共11页Natural Gas Geoscience

基　　金：国家重点研发计划项目“有机-无机相互作用影响下生烃母质生烃过程及机理研究”(编号:2017YFC0603102);中国科学院战略性先导科技专项(A类)项目(编号:XDA14010404)联合资助。

摘　　要：近年来,随着同位素分析手段的不断进步,Li同位素广泛应用于多种地质研究过程的示踪研究中。简要介绍了Li元素独特的地球化学性质和自然界各地质储库中的Li含量及同位素特征,分析了地球表层和地下深部地质过程中Li同位素的分馏机制,总结了Li同位素在示踪大陆化学风化和板片俯冲过程中的应用进展,讨论了在表层和深部物质循环过程中Li在各储库间的分配。最后,结合火山活动对沉积盆地有机质富集的影响等相关问题的研究,提出Li同位素在鉴别"水携型"和"空降型"凝灰岩中具有较大潜力。Recent years,as the improvement of isotopic analysis technique,lithium isotopes are widely used in tracing various geologic evidences.This paper gave a short introduction about the unique geochemistry character of lithium and lithium isotope of all kinds of lithium reservoir in nature.Besides,we analyze the fractionation mechanisms of lithium isotope during the geologic process under deep environment,summary the advance of lithium isotope in tracing weathering and subduction process,as well as,we also give a discussion about the distribution of lithium in various reservoir during the circulation of deep substance.Finally,combining the research of the influence that volcanic activity exerted on organic matter enrichment,this paper proposed that lithium may have great potential in identifying"water-carrying type"tuff and"airborne type"tuff.

关 键 词：Li同位素 示踪 大陆风化 洋壳俯冲 水携型 空降型 

分 类 号：TP122.113[自动化与计算机技术—控制理论与控制工程]