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《Marine Geology & Quaternary Geology》 2001-01
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REE GEOCHEMISTRY OF LATE CENOZOIC EOLIAN SEDIMENTS AND THE PALEOCLIMATE SIGNIFICANCE

CAO Jun ji,ZHANG Xiao ye,WANG Dan,ZHOU Jie (State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,CAS,Xi’an 710054,China)  
Reported in this paper are the REE geochemistry,distribution patterns and character parameters in late Cenozoic eolian sediments of Bajiazui section at Xifeng City.Also we compare the REE characteristics with other eolian samples from the late Tertiary red desert,late Tertiary fluvial sandstone,Quaternary desert,modern dust storm dust,China loess and remote source westerly dust.All these eolian deposits have similar REE distribution patterns,which are moderately rich in Ce family elements,with negative slopes and negative Eu anomaly.The late Tertiary red desert is one of the major sources of red clay.The red clay has similar material sources and formation to typical eolian deposits such as modern dust storm and China loess.And its REE characters have obvious differences from the fluvial sandstone.These results provide clear evidences for eolian origin of the red clay.The red clay in Bajiazui section was from dust transported by east Asia monsoon circulation rather than westerly circulation from North China desert source areas between 6 5 MaBP and 2 5 MaBP.
【Fund】: 国家自然科学基金资助项目 !(49894170 ;4982 5 10 5 )
【CateGory Index】: P595
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