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DOI | 10.1029/2021GL096049 |
Significant increase of continental freeboard during the early Paleoproterozoic: Insights from metasediment-derived granites | |
Gui-Mei Lu; Christopher J. Spencer; Yang Tian; Wei Wang | |
2021-11-10 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Subaerial continental crust plays a fundamental role in modulating the composition of the ocean, atmosphere, and biosphere, but the timing and rate of continental emergence above sea level remain unclear. Here we use the zircon oxygen isotopic compositions of early Paleoproterozoic metasediment-derived granitoids from the southwestern Yangtze Craton to constrain the rapidity of continental emergence. Statistical analyses of compiled igneous and detrital zircon oxygen isotopic database show a rapid increase in zircon δ18O at ∼2.36 Ga. We suggest that this isotopic shift is best explained by a significant increase of continental freeboard between ∼2.43 Ga and ∼2.36 Ga due to the increasing strength of the continental lithosphere since the late Archean, concomitantly yielding a high-δ18O sedimentary reservoir. Subsequent melting of these high-δ18O sediments in a variety of tectonic regimes results in high zircon δ18O. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/340955 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Gui-Mei Lu,Christopher J. Spencer,Yang Tian,et al. Significant increase of continental freeboard during the early Paleoproterozoic: Insights from metasediment-derived granites[J]. Geophysical Research Letters,2021. |
APA | Gui-Mei Lu,Christopher J. Spencer,Yang Tian,&Wei Wang.(2021).Significant increase of continental freeboard during the early Paleoproterozoic: Insights from metasediment-derived granites.Geophysical Research Letters. |
MLA | Gui-Mei Lu,et al."Significant increase of continental freeboard during the early Paleoproterozoic: Insights from metasediment-derived granites".Geophysical Research Letters (2021). |
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