Mathematics – Logic
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.2267t&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 50, Oct. 1986, p. 2267-2279. Research supported by the Geological Survey
Mathematics
Logic
15
Metamorphic Rocks, Petrology, Rare Earth Elements, Sedimentary Rocks, Tectonics, Abundance, Australia, Canada, Geological Surveys, Republic Of South Africa
Scientific paper
REE 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.
Eriksson Kenneth A.
McLennan Scott M.
Ross Taylor Stuart
Rudnick Roberta L.
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