期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2012
卷号：109
期号：12
页码：4371-4376
DOI：10.1073/pnas.1115705109
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Oxygen and hydrogen isotope compositions of Earth's seawater are controlled by volatile fluxes among mantle, lithospheric (oceanic and continental crust), and atmospheric reservoirs. Throughout geologic time the oxygen mass budget was likely conserved within these Earth system reservoirs, but hydrogen's was not, as it can escape to space. Isotopic properties of serpentine from the approximately 3.8 Ga Isua Supracrustal Belt in West Greenland are used to characterize hydrogen and oxygen isotope compositions of ancient seawater. Archaean oceans were depleted in deuterium [expressed as{delta} D relative to Vienna standard mean ocean water (VSMOW)] by at most 25 {+/-} 5{per thousand
关键词：Archaean ; faint early sun ; hydrogen escape ; hydrosphere ; serpentine
