利用黄土中碳同位素推断古植被类型  

Paleo-Vegetation Type Predicting by Experiment of Carbon Isotope in Loess

作　　者：卢玉东[1] 孙建中[1] 李佩成[1] Frakes L A 

机构地区：[1]长安大学 [2]澳大利亚阿德莱德大学

出　　处：《林业科学》2007年第8期134-137,共4页Scientia Silvae Sinicae

基　　金：中澳国际合作项目"黄土碳同位素;铁含量与古气候";长安大学校科技发展基金项目(06Z04)"土壤侵蚀空间变异性研究";国家科委项目(2002BA901A43)"中国西北不同生态地域山川秀美试验示范区建设与重大科技难题研究"资助

摘　　要：Carbon isotope of loess through S0 to S 11 at luochuan section in Shaanxi Province were experimented.The curve of δ 13C compares well to the oxygen isotope curves of deep sea sediments from DSDP607 drill.There is obviously negative peak of δ 13C within S5 paleosol where the content of δ 13C is-16.615‰,that shows the climatic optimum,and the vegetation during the period is likely forest.Comparing with the pollen analysis,the vegetation type of paleosol S0,S1,S4,S8,S9 which δ 13C content is-5.85‰～-10.00‰,is forest-grass.δ 13C content of paleosol S2、S3、S6、S7 is-8.72‰～-6.95‰,their vegetation is grass.The loess layer L1、L2、L5、L6、L8、L9 represent the severe cold-dry glacial period with δ 13C content of-3.7‰～-2.27‰,their vegetation belonging to steppe-desert.Carbon isotope of loess through S0 to S 11 at luochuan section in Shaanxi Province were experimented.The curve of δ^13C compares well to the oxygen isotope curves of deep sea sediments from DSDP607 drill.There is obviously negative peak of δ^13C within S5 paleosol where the content of δ^13C is-16.615‰,that shows the climatic optimum,and the vegetation during the period is likely forest.Comparing with the pollen analysis,the vegetation type of paleosol S0,S1,S4,S8,S9 which δ^13C content is-5.85‰～-10.00‰,is forest-grass.δ^13C content of paleosol S2、S3、S6、S7 is-8.72‰～-6.95‰,their vegetation is grass.The loess layer L1、L2、L5、L6、L8、L9 represent the severe cold-dry glacial period with δ^13C content of-3.7‰～-2.27‰,their vegetation belonging to steppe-desert.

关 键 词：黄土 碳同位素 古植被 孢粉 

分 类 号：P597[天文地球—地球化学]