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A record of deep-ocean dissolved O2 from the oxidation state of iron in submarine basalts.
Nature. 2018 01 18; 553(7688):323-327.Nat

Abstract

The oxygenation of the deep ocean in the geological past has been associated with a rise in the partial pressure of atmospheric molecular oxygen (O2) to near-present levels and the emergence of modern marine biogeochemical cycles. It has also been linked to the origination and diversification of early animals. It is generally thought that the deep ocean was largely anoxic from about 2,500 to 800 million years ago, with estimates of the occurrence of deep-ocean oxygenation and the linked increase in the partial pressure of atmospheric oxygen to levels sufficient for this oxygenation ranging from about 800 to 400 million years ago. Deep-ocean dissolved oxygen concentrations over this interval are typically estimated using geochemical signatures preserved in ancient continental shelf or slope sediments, which only indirectly reflect the geochemical state of the deep ocean. Here we present a record that more directly reflects deep-ocean oxygen concentrations, based on the ratio of Fe3+ to total Fe in hydrothermally altered basalts formed in ocean basins. Our data allow for quantitative estimates of deep-ocean dissolved oxygen concentrations from 3.5 billion years ago to 14 million years ago and suggest that deep-ocean oxygenation occurred in the Phanerozoic (541 million years ago to the present) and potentially not until the late Palaeozoic (less than 420 million years ago).

Authors+Show Affiliations

Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA.Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA. Berkeley Geochronology Center, Berkeley, California 94720, USA.

Pub Type(s)

Historical Article
Journal Article

Language

eng

PubMed ID

29310121

Citation

Stolper, Daniel A., and C Brenhin Keller. "A Record of Deep-ocean Dissolved O2 From the Oxidation State of Iron in Submarine Basalts." Nature, vol. 553, no. 7688, 2018, pp. 323-327.
Stolper DA, Keller CB. A record of deep-ocean dissolved O2 from the oxidation state of iron in submarine basalts. Nature. 2018;553(7688):323-327.
Stolper, D. A., & Keller, C. B. (2018). A record of deep-ocean dissolved O2 from the oxidation state of iron in submarine basalts. Nature, 553(7688), 323-327. https://doi.org/10.1038/nature25009
Stolper DA, Keller CB. A Record of Deep-ocean Dissolved O2 From the Oxidation State of Iron in Submarine Basalts. Nature. 2018 01 18;553(7688):323-327. PubMed PMID: 29310121.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A record of deep-ocean dissolved O2 from the oxidation state of iron in submarine basalts. AU - Stolper,Daniel A, AU - Keller,C Brenhin, Y1 - 2018/01/03/ PY - 2017/07/10/received PY - 2017/11/02/accepted PY - 2018/1/9/pubmed PY - 2018/6/5/medline PY - 2018/1/9/entrez SP - 323 EP - 327 JF - Nature JO - Nature VL - 553 IS - 7688 N2 - The oxygenation of the deep ocean in the geological past has been associated with a rise in the partial pressure of atmospheric molecular oxygen (O2) to near-present levels and the emergence of modern marine biogeochemical cycles. It has also been linked to the origination and diversification of early animals. It is generally thought that the deep ocean was largely anoxic from about 2,500 to 800 million years ago, with estimates of the occurrence of deep-ocean oxygenation and the linked increase in the partial pressure of atmospheric oxygen to levels sufficient for this oxygenation ranging from about 800 to 400 million years ago. Deep-ocean dissolved oxygen concentrations over this interval are typically estimated using geochemical signatures preserved in ancient continental shelf or slope sediments, which only indirectly reflect the geochemical state of the deep ocean. Here we present a record that more directly reflects deep-ocean oxygen concentrations, based on the ratio of Fe3+ to total Fe in hydrothermally altered basalts formed in ocean basins. Our data allow for quantitative estimates of deep-ocean dissolved oxygen concentrations from 3.5 billion years ago to 14 million years ago and suggest that deep-ocean oxygenation occurred in the Phanerozoic (541 million years ago to the present) and potentially not until the late Palaeozoic (less than 420 million years ago). SN - 1476-4687 UR - https://www.unboundmedicine.com/medline/citation/29310121/A_record_of_deep_ocean_dissolved_O2_from_the_oxidation_state_of_iron_in_submarine_basalts_ L2 - https://doi.org/10.1038/nature25009 DB - PRIME DP - Unbound Medicine ER -