Journal
SCIENCE BULLETIN
Volume 65, Issue 11, Pages 958-964Publisher
ELSEVIER
DOI: 10.1016/j.scib.2020.03.023
Keywords
In situ; Supercritical CO2; Origin of life; Amino acid; Hydrothermal vents; Raman spectrum
Categories
Funding
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA22050100]
- National Natural Science Foundation of China (NSFC) [41822604, 41576104]
- National Key Research and Development Program of China [2016YFC0302103]
- Key Research Program of Frontier Sciences, of Chinese Academy of Sciences [QYZDB-SSW-DQC004]
- NSFC-Shandong Joint Fund for Marine Science Research Centers [U1606401]
- Young Taishan Scholars Program [tsqn201909158]
- Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao) [MGQNLM-TD201904]
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Supercritical CO2 appearing as bubbles in hydrothermal vents was identified in the south part of the Okinawa Trough using in situ Raman spectroscopy. Significantly, the N-2 peak in supercritical CO2 is much larger than those in seawater and vent fluids, indicating that supercritical CO2 enriches N-2 from the surrounding environment. Considering that the partial pressures of CO2 and N-2 in the Earth's protoatmosphere were similar to 10-20 MPa, supercritical CO2 with high N-2 was likely the dominant CO2 phase near the water-air interface in the early history of the Earth, which promoted the synthesis, pre-enrichment and preservation of amino acids and other organic matters that are essential to the origin of life. (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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