根管石地球化学研究进展  

Progresses on geochemistry of rhizoliths

作　　者：王超[1] 葛璐[1] 陈建生[1,2] 赵智[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098 [2]河海大学土木工程与交通学院,南京210098

出　　处：《地质科学》2015年第4期1280-1292,共13页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中央高校基本科研业务费项目（编号：2014817514）资助.

摘　　要：根管石是高等植物的化石遗迹,是陆地生态系统的敏感指示剂.根管石及其相关特征不仅证实了古土壤的存在并反映出古代陆地渗流环境的演化,同时为研究古地理、古气候以及植物古生态提供了重要信息.近几十年来,国际上对黄土—古土壤序列、海岸带和蒸发盐湖等环境中根管石的地球化学特征、成因和形成环境等已经进行了一系列研究并取得了一定的成果.本文总结了根管石的地球化学研究进展,概括了不同环境中根管石的形态、矿物组成、碳氧同位素组成以及碳同位素定年等特征,论述了根管石的形成过程及其对环境的指示意义。Defined as fossil remains of higher plants, rhizoliths are the best fingerpost for studying terrestrial ecosystems changes. Rhizoliths with their related features are also indicators of incidence of palaeosols and subaerialvadose environments in ancient successions. In recent decades, the classification, genesis, geochemistry and significance of rhizoliths have been widely researched at environments such as loess, coastal zone and saline lake, for they can provide important information on paleogeography, paleoclimate, and plant paleoecology. Rhizolith has important significance. In this paper, we summarized the research progresses on rhizoliths at different environments, including their morphology, mineral compositions, carbon and oxygen isotopes, carbon dating and other information in hopes of giving a clear understanding of the formation process of rhizoliths and their significance to environment.

关 键 词：根管石 碳氧同位素 古环境 古植被 古气候 

分 类 号：P588.24[天文地球—岩石学] P597[天文地球—地质学]