Titanium isotopic evidence for felsic crust and plate tectonics 3.5 billion years ago

Greber, Nicolas; Dauphas, Nicolas; Bekker, Andrey; Ptáček, Matouš P.; Bindeman, Ilya N.; Hofmann, Axel (2017). Titanium isotopic evidence for felsic crust and plate tectonics 3.5 billion years ago. Science, 357(6357), pp. 1271-1274. American Association for the Advancement of Science 10.1126/science.aan8086

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The composition of continental crust far back in Earth's history gives us insight into when plate tectonics ramped up and has influenced ocean chemistry. Greber et al. looked at titanium isotopes in shales, which form from eroded continental crustal sediments, to estimate the composition 3.5 billion years ago, closer to the origins of Earth. They found a silica-rich composition, which indicates that plate tectonics was happening deep in our distant past. Other changes in crustal composition might be linked to changing ocean chemistry and major events such as the oxygenation of our atmosphere.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences

UniBE Contributor:

Greber, Nicolas

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

0036-8075

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Nicolas Greber

Date Deposited:

15 Aug 2019 11:43

Last Modified:

23 Oct 2019 11:12

Publisher DOI:

10.1126/science.aan8086

PubMed ID:

28935801

BORIS DOI:

10.7892/boris.131451

URI:

https://boris.unibe.ch/id/eprint/131451

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