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COMPOSITIONS OF MINERALS,REEs,AND Sr,Nd ISOTOPES IN CORE CP25 FROM THE CENTRAL PACIFIC OCEAN-THE EVIDENCES FOR VOLCANIC PROCESS DURING LATE CENOZOIC
Author(s): 
Pages: 55-64
Year: Issue:  2
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY

Keyword:  中太平洋晚新生代火山活动证据;
Abstract: 中太平洋CP25岩心沉积物中钙十字沸石、蒙脱石/伊利石比值(M/I)、稀土元素含量、铈异常(δCe)、铕异常(δEu)及Sr、Nd同位素特征作为海底火山活动的证据,揭示了中太平洋海盆晚新生代以来火山活动和沉积的历史.其结果是,早中新世约20~17MaB.P.间,火山活动逐渐强烈,在17MaB.P.最强烈,使得沉积物具有高M/I和∈Nd、低δCe和87Sr/86Sr.17~1MaB.P.发生沉积间断.1MaB.P.至现代,火山活动较早中新世减弱.
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