Hydrothermal activities and seawater acidification in the Late Devonian F-F transition： Evidence fr

• 作 者: ZENG JianWei XU Ran GONG YiMin
• 机 构: KeyLaboratoryofBiogeologyandEnvironmentalGeologyofMinistryofEducation&,StateKeyLaboratoryofGeolog
• 出 处: 中国科学：地球科学英文版
• 发表日期: 2011年4期
• 关键词: 稀土元素地球化学 晚泥盆世 酸化 海水 热液活动 分析样品 跃迁 ff Devonian mass extinction REE hydrothermal
• 基金项目: This work was financially supported by Natural Science Foundation of China （Grant Nos. 40730209, 40802005, 40872001, 40921062）, the ＂111 ＂ Project （Grant No. B08030） and the MOST Special Fund from the

Rare-earth elements(REE) in limestones were measured by ICP-MS from the Yangdi section across the Frasnian-Famennian(F-F) transition in Guilin,Guangxi of South China.The averageΣREE contents of measured samples are 33.32 ppm.The average LREE/HREE ratio is