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Mafic Archean continental crust prohibited exhumation of orogenic UHP eclogite

Abstract:

The absence of ultrahigh pressure (UHP) orogenic eclogite in the geological record older than c. 0.6 Ga is problematic for evidence of subduction having begun on Earth during the Archean (4.0–2.5 Ga). Many eclogites in Phanerozoic and Proterozoic terranes occur as mafic boudins encased within low-density felsic crust, which provides positive buoyancy during subduction; however, recent geochemical proxy analysis shows that Archean continental crust was more mafic than previously thought, havin...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.gsf.2021.101225

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More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Earth Sciences
Oxford college:
St Cross College
Role:
Author
ORCID:
0000-0002-6959-0462
More by this author
Role:
Author
ORCID:
0000-0001-8912-2730
Publisher:
Elsevier Publisher's website
Journal:
Geoscience Frontiers Journal website
Volume:
12
Issue:
5
Article number:
101225
Publication date:
2021-05-21
Acceptance date:
2021-05-07
DOI:
ISSN:
1674-9871
Language:
English
Keywords:
Pubs id:
1169798
Local pid:
pubs:1169798
Deposit date:
2022-06-01

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