Re-visiting barium isotope compositions of mid-ocean ridge basalts and the implications
2022-05-25 05:19XiaoyunNanHuiminYuJintingKangandFangHuang
中国科学技术大学学报 2022年3期
Xiaoyun Nan ✉, Huimin Yu, Jinting Kang, and Fang Huang
1CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;
2CAS Center for Excellence in Comparative Planetology, Hefei 230026, China
Graphical abstract
We estimate the average δ138/134Ba of the depleted MORB mantle (DMM) as +0.05‰±0.05‰ (2SD, n=16) based on D-MORBs.
Public summary
■ The δ138/134Ba of the global MORBs range from −0.06‰ to +0.15‰.
■ This study obtains the average δ138/134Ba of the DMM as +0.05‰±0.05‰ (2SD,n=16), which is much lower than the previous estimation.
■ Ba isotope compositions of the E-MORBs could be sourced by the incorporation of subducted AOC and/or sediments.
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