Titanium stable isotopic compositions of chondrites and ancient to modern terrestrial mantle-derived lavas
收藏Interdisciplinary Earth Data Alliance (IEDA)2023-05-26 更新2026-04-23 收录
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https://repo.astromat.org/view.php?id=2942&system=astro
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资源简介：
We report ultra-high precision 49Ti/47Ti ratios for chondrites, ancient terrestrial mantle-derived lavas ranging from 3.8 to 2.0 Ga and modern oceanic island basalts (OIBs). Our new Ti bulk silicate Earth (BSE) estimate based on chondrites is 0.052±0.006‰ heavier than the modern upper mantle sampled by normal-type mid-ocean ridge basalts (N-MORBs). The 49Ti/47Ti ratio of Earth’s upper mantle was chondritic before 3.5 Ga and evolved to a N-MORB-like composition between ~3.5-2.7 Ga. Modern OIBs record variable 49Ti/47Ti ratios ranging from chondritic to N-MORBs compositions.
提供机构：
Nikolajsen, Katrine; Huang, Dongyang; Pan, Lu; Schiller, Martin; Saji, Nikitha; Bizzarro, Martin; Millet, Marc-Alban; Jackson, Matthew; Deng, Zhengbin
创建时间：
2023-05-26
