Crustal influence in the generation of continental flood basalts

Details Crustal influence in the generation of continental flood basalts Crustal influence in the generation of continental flood basalts

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.289..160c&link_type=abstract

Nature, vol. 289, Jan. 15, 1981, p. 160-162.

Mathematics

Logic

23

Basalt, Continents, Earth Crust, Earth Mantle, Neodymium Isotopes, Abundance, Geological Surveys, Meteoritic Composition, Rocks, Strontium Isotopes

Scientific paper

The suggestion that primordial undifferentiated material may exist in the earth's mantle has recently been revived on the strength of Nd isotope data for two types of young continental rocks - flood basalts and kimberlites. The limited published data show a clustering of Nd isotopic compositions close to those for meteorites with chondritic relative rare-earth (REE) abundance. In contrast, data are presented for samples from the Columbia flood basalt province of the northwestern United States which show large isotopic variability suggestive of mixing processes acting after the separation of the primary magmas from their mantle source.

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