Computer Science
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45..989w&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Issue 6, pp.989-995
Computer Science
14
Scientific paper
143 Nd / 144 Nd ratios measured in Quaternary lavas from Java and the Banda arc of Indonesia range from 0.51242 to 0.51280 and exhibit an inverse correlation with 87 Sr / 86 Sr . Isotopically, the Indonesian samples resemble Andean rather than island arc lavas. The samples from Java plot either within, or adjacent to the mantle array, towards higher 87 Sr / 86 Sr ratios. Samples from the Banda arc and the anomalous calc-alkaline volcano Papandajan are characterized by relatively low 143 Nd / 144 Nd and high 87 Sr / 86 Sr ratios. These characteristics are consistent with the interpretation that subducted terrigenous material was involved in the genesis of these lavas. Furthermore the Banda arc samples appear to lie on a mixing line between isotopic compositions characteristic of the mantle and upper continental crust. A high-K trachyte from the alkaline volcano Muriah, Java, has isotopic characteristics of the mantle ( 143 Nd / 144 Nd = 0.51270, 87 Sr / 86 Sr = 0.70424), which implies that the extreme enrichment in large-ion-lithophile elements in its source must have occurred only shortly before its formation. The inferred 143 Nd / 144 Nd ratio of the unmodified mantle beneath Java and the Banda arc is lower than that observed in mid-ocean ridge basalt, which may have important implications for a better understanding of the geochemical structure of the mantle.
Jezek Peter A.
White William M.
Whitford David J.
No associations
LandOfFree
Neodymium isotopic composition of Quaternary island arc lavas from Indonesia 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 Neodymium isotopic composition of Quaternary island arc lavas from Indonesia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neodymium isotopic composition of Quaternary island arc lavas from Indonesia will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-993889