Titanium isotopic evidence for felsic crust and plate tectonics 3.5 billion years ago-Reference-Cited by-同舟云学术

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

Published:2017-09-22 Issue:6357 Volume:357 Page:1271-1274
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Greber Nicolas D.¹^ORCID,Dauphas Nicolas¹^ORCID,Bekker Andrey²³,Ptáček Matouš P.¹^ORCID,Bindeman Ilya N.⁴^ORCID,Hofmann Axel³^ORCID

Affiliation:

1. Origins Laboratory, Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60615, USA.

2. Department of Earth Sciences, University of California, Riverside, CA 92521, USA.

3. Department of Geology, University of Johannesburg, Post Office Box 524, Auckland Park, 2006, Republic of South Africa.

4. Department of Geological Sciences, 1272 University of Oregon, Eugene, OR 97403, USA.

Abstract

An early call for plate tectonics 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. Science , this issue p. 1271

Funder

National Science Foundation

National Aeronautics and Space Administration

National Research Foundation

NSERC Discovery and Accelerator program

Swiss National Science Foundation

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference89 articles.

1. Two-step rise of atmospheric oxygen linked to the growth of continents