Other
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..37..401c&link_type=abstract
Earth and Planetary Science Letters, Volume 37, Issue 3, p. 401-408.
Other
23
Scientific paper
143Nd/144Nd ratios have been determined on Recent basic volcanics from two areas of continental volcanism, Roccamonfina in the Roman Province of Italy and Mt. Etna in Sicily. The 143Nd/144Nd ratios of Mt. Etna volcanics range from 0.51292 +/- 3 to 0.51298 +/- 2 and are similar to Icelandic and other oceanic volcanics. In contrast the 143Nd/144Nd ratios of Roccamonfina volcanics range from 0.51208 +/- 2 to 0.51240 +/- 2 and are the lowest yet recorded in Recent volcanics. These data together with 87Sr/86Sr ratios extend the range of covariation of Nd- and Sr-isotope compositions in basaltic rocks. Relative to average chondrite REE abundances, the Mt. Etna volcanics have been derived from sources with a time-integrated light-REE depletion, whereas the source regions of the Roccamonfina volcanics have a time-integrated light-REE enrichment. sThe light-REE-depleted character implied by the Nd-isotope data for the sources of the Mt. Etna tholeiites is in direct contrast with the light-REE enrichment in the tholeiites themselves. This discrepancy is most simply resolved by postulating an enrichment event in the source regions of the Mt. Etna tholeiites ca. 2-5 × 108 years ago. This event occurred sufficiently close in time to the present that the current light-REE-enriched character of the sources is not reflected in its Nd-isotope composition.
Carter S. R.
Evensen Norman M.
Hamilton J. P.
Keith O'Nions R.
No associations
LandOfFree
Continental volcanics derived from enriched and depleted source regions: Nd- and Sr-isotope evidence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Continental volcanics derived from enriched and depleted source regions: Nd- and Sr-isotope evidence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continental volcanics derived from enriched and depleted source regions: Nd- and Sr-isotope evidence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-944067