The geologic history of seawater oxygen isotopes from marine iron oxides; Science; Vol. 365, iss. 6452

The geologic history of seawater oxygen isotopes from marine iron oxides; Science; Vol. 365, iss. 6452

Библиографические подробности
Источник:Science
Vol. 365, iss. 6452.— 2019.— [P. 469-473]
Автор-организация: Национальный исследовательский Томский политехнический университет Инженерная школа природных ресурсов Отделение геологии
Другие авторы: Galili N. Nir, Shemesh A. Aldo, Yam R. Ruth, Brailovsky I. Irena, Sela-Adler M. Michal, Rudmin M. A. Maksim Andreevich
Примечания:Title screen
The oxygen isotope composition (δ18O) of marine sedimentary rocks has increased by 10 to 15 per mil since Archean time. Interpretation of this trend is hindered by the dual control of temperature and fluid δ18O on the rocks' isotopic composition. A new δ18O record in marine iron oxides covering the past ~2000 million years shows a similar secular rise. Iron oxide precipitation experiments reveal a weakly temperature-dependent iron oxide-water oxygen isotope fractionation, suggesting that increasing seawater δ18O over time was the primary cause of the long-term rise in δ18O values of marine precipitates. The 18O enrichment may have been driven by an increase in terrestrial sediment cover, a change in the proportion of high- and low-temperature crustal alteration, or a combination of these and other factors.
Язык:английский
Опубликовано: 2019
Предметы:
электронный ресурс
труды учёных ТПУ
изотопы
кислород
морские воды
оксид железа
Online-ссылка:https://doi.org/10.1126/science.aaw9247
Формат: Электронный ресурс Статья
Запись в KOHA:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=661361

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