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Rare earth element patterns in Archean high-grade metasediments and their tectonic significanceREE data on metasedimentary rocks from two different types of high-grade Archean terrains are presented and analyzed. The value of REEs as indicators of crustal evolution is explained; the three geologic settings (in North America, Southern Africa, and Australia) from which the samples were obtained are described; and the data are presented in extensive tables and graphs and discussed in terms of metamorphic effects, the role of accessory phases, provenance, and tectonic implications (recycling, the previous extent of high-grade terrains, and a model of Archean crustal growth). The diversity of REE patterns in shallow-shelf metasediments is attributed to local provenance, while the Eu-depleted post-Archean patterns are associated with K-rich plutons from small, stable early Archean terrains.
Document ID
19870037625
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Taylor, Stuart Ross
(Australian National Univ. Canberra, Australia)
Rudnick, Roberta L.
(Australian National Univ. Canberra, Australia)
Mclennan, Scott M.
(Australian National University Canberra, United States)
Eriksson, Kenneth A.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1986
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 50
ISSN: 0016-7037
Subject Category
Geophysics
Accession Number
87A24899
Funding Number(s)
CONTRACT_GRANT: NAGW-488
Distribution Limits
Public
Copyright
Other

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