无机地球化学指标在古盐度恢复中的应用及展望

Application and Outlook of Inorganic Geochemical Indexes in Reconstruction of Palaeosalinity

古盐度是古环境研究中的热点问题之一,无机地球化学指标在古盐度的恢复中起着重要的作用。本文通过对沉积磷酸盐法、硼元素法、同位素法、稀有气体元素法、元素比值法、Na+浓度法进行归纳与总结,结合地质实际,简述各方法在古盐度重建中的应用及注意事项,并根据各方法的研究现状及局限性,对无机地球化学方法的发展作出展望,为海陆相划分、古环境恢复以及新方法的探索等提供参考。

Palaeosalinity is a hotspot in palaeoenvironment research and the indexes of inorganic geochemistry play a significant part in the reconstruction of palaeosalinity.This paper first summarized the methods used in the reconstruction of palaeosalinity,including the sedimentary phosphate method,boron element methods,isotope methods,noble gas methods and Na+concentrations method.Then it sketched the applications of these methods and corre-sponding precautions based on geological evidence.Finally,it gave the outlook of the development of inorganic geochemistry method according to the research status and limitations of these methods.This study could provide some references for the division of marine facies and continental facies,the reconstruction of palaeoenvironment,and the exploration of new methods.