Open AccessRise of atmospheric oxygen and the “upside‐down” Archean mantle
Author(s) -
Kump Lee R.,
Kasting James F.,
Barley Mark E.
Publication year - 2001
Publication title -
geochemistry, geophysics, geosystems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.928
H-Index - 136
ISSN - 1525-2027
DOI - 10.1029/2000gc000114
Subject(s) - archean , geology , mantle plume , early earth , volcano , earth science , banded iron formation , snowball earth , mantle (geology) , proterozoic , atmospheric oxygen , geochemistry , precambrian , astrobiology , oxygen , glacial period , lithosphere , paleontology , tectonics , chemistry , physics , organic chemistry
The establishment of an oxygen‐rich atmosphere dramatically altered the evolution of life on Earth. Most of the recent discussion of the topic has been focused on the timing of the event rather than on its mechanism. Here we draw upon recent developments in the understanding of Earth's interior to propose that the rise of oxygen followed a geologically abrupt period of mantle overturn and/or intense plume activity near the Archean‐Proterozoic transition, 2470–2450 million years ago. The magmatic event has already been linked to the widespread deposition of oxide‐facies banded iron formation, and the rise of oxygen has been implicated as the trigger for iron deposition and Earth's first major glaciation. We argue that these events are all related to a change in redox state of volcanic gases brought about by deep‐seated Late Archean and earliest Paleoproterozoic magmatism.