Volume 97, Issue 1 pp. 316-326
Special Section

The Paleoproterozoic and Neoproterozoic Carbon Cycle Promoted the Evolution of a Habitable Earth

Zhicheng LIU

Zhicheng LIU

Key Laboratory of Orogenic Belt and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing, 100871 China

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Lifei ZHANG

Corresponding Author

Lifei ZHANG

Key Laboratory of Orogenic Belt and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing, 100871 China

Corresponding author. E-mail: [email protected]Search for more papers by this author
First published: 15 March 2023
Citations: 2

About the first author:

LIU Zhicheng, male, born in 1992 in Shandong Province; Ph.D. candidate at the School of Earth and Space Sciences, Peking University. He is currently engaged in research on the carbon cycle of the Paleoproterozoic and evolution of the habitable Earth. E-mail: [email protected].

About the corresponding author:

ZHANG Lifei, male, born in 1963 in Lishu County, Jilin Province; Ph.D. in geology; graduated from Peking University; professor of School of Earth and Space Sciences, Peking University. He is now interested in the study on metamorphic geology and deep carbon cycle in subduction zone. E-mail: [email protected].

Abstract

The carbon cycle is an important process that regulates Earth's evolution. We compare two typical periods, in the Paleoproterozoic and Neoproterozoic, in which many geological events occurred. It remains an open question when modern plate tectonics started on Earth and how it has influenced the carbon cycle through time. In the Paleoproterozoic, intense weathering in a highly CO2 and CH4 rich atmosphere caused more nutritional elements to be carried into the ocean. Terrestrial input boosted high biological productivity, deposition of sediments and the formation of an altered oceanic crust, which may have promoted an increase in the oxygen content. Sediment lubrication and a decrease in mantle potential temperature made cold and deep subduction possible, which carried more carbon into the deep mantle. Carbon can be stored in the mantle as diamond and carbonated mantle rocks, being released by arc and mid-ocean ridge outgassing at widely different times. From the Paleoproterozoic through the Neoproterozoic to the Phanerozoic, the carbon cycle has promoted the evolution of a habitable Earth.

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