Europium and strontium anomalies in the MORB source mantle
作者: Ming TangWilliam F. McDonoughRichard D. Ash
作者单位: 1Department of Geology, University of Maryland, College Park, MD 20742, USA
刊名: Geochimica et Cosmochimica Acta, 2017, Vol.197 , pp.132-141
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2016.10.025
关键词: Eu anomalySr anomalyPrimitive MORBDisequilibrium meltingLower crustal recycling
英文摘要: Abstract(#br)Lower crustal recycling depletes the continental crust of Eu and Sr and returns Eu and Sr enriched materials into the mantle (e.g., Tang et al., 2015, Geology). To test the hypothesis that the MORB source mantle balances the Eu and Sr deficits in the continental crust, we carried out high precision Eu/Eu ∗ and Sr/Sr ∗ measurement for 72 MORB glasses with MgO >8.5% from the Pacific, Indian, and Atlantic mid-ocean ridges. MORB glasses with MgO9wt.% have a mean Eu/Eu ∗ of 1.025±0.025 (2 σ m , n =46) and Sr/Sr ∗ of 1.242±0.093 (2 σ m , n =41) and these ratios are positively...
全文获取路径: Elsevier  (合作)
影响因子:3.884 (2012)