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When did plate tectonics begin? Evidence from the geologic record

Kent C. Condie and Alfred Kroener
When did plate tectonics begin? Evidence from the geologic record (in When did plate tectonics begin on planet Earth?, Kent C. Condie (editor) and Victoria Pease (editor))
Special Paper - Geological Society of America (2008) 440: 281-294

Abstract

Modern-style plate tectonics can be tracked into the geologic past with petrotectonic assemblages and other plate-tectonic indicators. These indicators suggest that modern plate tectonics were operational, at least in some places on the planet, by 3.0 Ga, or even earlier, and that they became widespread by 2.7 Ga. The scarcity of complete ophiolites before 1 Ga may be explained by thicker oceanic crust and preservation of only the upper, basaltic unit. The apparent absence of blueschists and ultrahigh-pressure metamorphic rocks before ca. 1 Ga may reflect steeper subduction geotherms and slower rates of uplift at convergent margins. It is unlikely that plate tectonics began on Earth as a single global "event" at a distinct time, but rather it is probable that it began locally and progressively became more widespread from the early to the late Archean.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 440
Title: When did plate tectonics begin? Evidence from the geologic record
Title: When did plate tectonics begin on planet Earth?
Author(s): Condie, Kent C.Kroener, Alfred
Author(s): Condie, Kent C.editor
Author(s): Pease, Victoriaeditor
Affiliation: New Mexico Institute of Mining & Technology, Department of Earth and Environmental Science, Socorro, NM, United States
Affiliation: New Mexico Institute of Mining and Technology, Department of Earth and Environmental Science, Socorro, NM, United States
Pages: 281-294
Published: 2008
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Meeting name: Penrose Conference
Meeting location: Lander, WY, USA, United States
Meeting date: 20060613June 14-18, 2006
References: 201
Accession Number: 2008-124325
Categories: Solid-earth geophysics
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: 2 tables
Secondary Affiliation: Stockholm University, SWE, SwedenInstitut fuer Geowissenschaften, DEU, Federal Republic of Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200848
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