地质论评2026，Vol.72Issue(2)：470-488,19.DOI:10.16509/j.georeview.2025.08.022
土壤碳酸盐碳氧同位素特征及其在古环境重建中的应用
Review on C—O isotopic characterisitics of pedogenic carbonate and their applications in paleoenvironment reconstruction
摘要
Abstract
Objectives:As a product of pedogenic processes,pedogenic carbonate plays a vital role in both paleoenvironmental reconstruction and Earth's surface system study.The review begins by systematically examining the composition,classification,formation mechanism and environmental factors of pedogenic carbonate.And then,it synthesizes its C-O isotopic composition characteristics,applications in paleoenvironmental reconstruction,and advances in pedogenic carbonate chronology. Results:The C-O isotopic signatures of pedogenic carbonate are primarily controlled by key parameters such as soil-respired CO2 concentration,soil water and soil temperature,providing reliable foundation for the quantitative reconstruction of paleoatmospheric CO2 levels,paleo-C3/C4 biomass and paleoprecipitation,paleotemperature,paleoelevation.Integrating diverse chronometric methods,particularly high-precision U-series dating,soil carbonate C-O signatures enable quantitative reconstruction of multidimensional paleoenvironmental parameters,serving as a crucial terrestrial environmental proxy.Meanwhile,significant challenges persist due to the complexity of pedogenic processes,including pedogenic carbonate spatiotemporal heterogeneity,selective preservation of environmental signals and burial diagenetic overprinting isotopic systems etc. Conclusions:Future research on pedogenic carbonate,such as dynamic modeling of formation processes,constraining key parameters,and isotopic processes during diagenesis will further enhance its application and reliability in paleoenvironmental reconstruction.关键词
土壤碳酸盐/碳氧同位素/古环境重建/年代学Key words
pedogenic carbonate/C-O isotopes/paleoenvironmental reconstruction/Chronology引用本文复制引用
陈岩滨,管后春,徐锦龙..土壤碳酸盐碳氧同位素特征及其在古环境重建中的应用[J].地质论评,2026,72(2):470-488,19.基金项目
本文为安徽省公益性地质工作项目(编号:2016-g-3-32、2022-g-2-1)、安徽省自然资源科技项目(编号:2023-K-16)和自然资源部地层与古生物重点实验室开放研究课题(编号:SP202401)的成果. This paper is supported by the non-profit geological projects of Anhui Province(Nos.2016-g-3-32,2022-g-2-1),the natural resources science and technology projects of Anhui Province(No.2023-K-16)and the open fund of Key Laboratory of Stratigraphy and Palaeontology,Ministry of Natural Resources(No.SP202401) （编号:2016-g-3-32、2022-g-2-1）
