An attempt was made to test the validity of the signatures of rare earth elements （REE） as a tool to judge the effect of diagenesis on fossil teeth. Sample REE contents and features of fossil teeth and sediments fro...An attempt was made to test the validity of the signatures of rare earth elements （REE） as a tool to judge the effect of diagenesis on fossil teeth. Sample REE contents and features of fossil teeth and sediments from Jinsha Relics, Sichuan, Southwest China were analyzed. The difference in REE content between fossil teeth is significantly greater than that between sediments at the Jinsha Relics. Chondrite-normalized REE patterns showed that obvious LREE enrichment and strong Ce and HREE depletion occurred in all fossil teeth samples. Meanwhile δCe and δEu values varied more dramatically in fossil teeth than in sediments. Accordingly, low content, LREE enrichment, strong Ce depletion, the significantly positive correlation between LREE/HREE and δCe, and unchanged （La/Yb）N demonstrated that the fossil teeth from Jinsha Relics have not been contaminated by diagenesis. The REE signature might be a potential proxy to assess the effect of diagenesis on fossil teeth.展开更多
The hominin record from southern Asia for the early Late Pleistocene epoch is scarce.Well-dated and well-preserved fossils older than 45.000 years that can be unequivocally attributed to H.sapiens are lacking.In a pap...The hominin record from southern Asia for the early Late Pleistocene epoch is scarce.Well-dated and well-preserved fossils older than 45.000 years that can be unequivocally attributed to H.sapiens are lacking.In a paper published October 15 online in Nature,Dr.LIU Wu from Institute of Vertebrate Paleontology and Paleoanthropology（IVPP）.CAS,and his international team announced the discovery of human teeth between 80.000 and120,000 years old from the newly excavated Fuyan Cave in Daoxian.southern China,展开更多
基金supported by the Program for New Century Excellent Talents in University (NCET-08-0379) the National Science and Technology Advancement of the Tenth Five-year Plan (2004BA810B05)
文摘An attempt was made to test the validity of the signatures of rare earth elements （REE） as a tool to judge the effect of diagenesis on fossil teeth. Sample REE contents and features of fossil teeth and sediments from Jinsha Relics, Sichuan, Southwest China were analyzed. The difference in REE content between fossil teeth is significantly greater than that between sediments at the Jinsha Relics. Chondrite-normalized REE patterns showed that obvious LREE enrichment and strong Ce and HREE depletion occurred in all fossil teeth samples. Meanwhile δCe and δEu values varied more dramatically in fossil teeth than in sediments. Accordingly, low content, LREE enrichment, strong Ce depletion, the significantly positive correlation between LREE/HREE and δCe, and unchanged （La/Yb）N demonstrated that the fossil teeth from Jinsha Relics have not been contaminated by diagenesis. The REE signature might be a potential proxy to assess the effect of diagenesis on fossil teeth.
文摘The hominin record from southern Asia for the early Late Pleistocene epoch is scarce.Well-dated and well-preserved fossils older than 45.000 years that can be unequivocally attributed to H.sapiens are lacking.In a paper published October 15 online in Nature,Dr.LIU Wu from Institute of Vertebrate Paleontology and Paleoanthropology（IVPP）.CAS,and his international team announced the discovery of human teeth between 80.000 and120,000 years old from the newly excavated Fuyan Cave in Daoxian.southern China,
