The nonmarine environment of Quaternary foraminifers in Yanghuzhuang, China: Evidence from boron and strontium isotopes  

作　　者：XIAO YingKai XIAO Jun ZHAO ZhiQi HE MaoYong LI ShiZhen 

机构地区：[1]Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China [2]Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China [3]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China [4]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2008年第14期2200-2206,共7页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40373006 and 40573013)

摘　　要：The concentrations and isotopic compositions of boron and strontium of Quaternary foraminifers and bivalve fossils collected in the Yanghuzhuang section of Yanqing, Beijing and of modern gastropods living in the Guishui River and of river water were measured. The concentrations and isotopic compo- sitions of Quaternary foraminifers and bivalve fossils differed from those of modern marine fo- raminifers and were similar to those of modern terrestrial gastropods from the Guishui River. These results indicate that early Quaternary foraminifers in the Yanghuzhuang section inhabited a nonmarine environment and that these foraminifers were not the result of a transgression or sea flooding. The foraminifers were not special halobios and can survive in the terrestrial condition that resembled those of the ocean.The concentrations and isotopic compositions of boron and strontium of Quaternary foraminifera and bivalve fossils collected in the Yanghuzhuang section of Yanqing, Beijing and of modern gastropods living in the Guishul River and of river water were measured. The concentrations and isotopic compositions of Quaternary foraminifera and bivalve fossils differed from those of modern marine foraminifers and were similar to those of modern terrestrial gastropods from the Guishui Riven These results Indicate that early Quaternary foraminifera in the Yanghuzhuang section inhabited a nonmarine environment and that these foraminifera were not the result of a transgression or sea flooding. The foraminifera were not special halobios and can survive in the terrestrial condition that resembled those of the ocean.

关 键 词：硼 锶 同位素组成 堆积物 有孔虫 海洋环境 

分 类 号：X32[环境科学与工程—环境工程]