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High precision measurements of 226 Ra– 230 Th– 238 U disequilibria and Ba concentrations are reported for samples from two chemically zoned trachyte deposits from Fogo volcano, São Miguel, Azores. High-precision U-series disequilibria measurements by plasma ionization multicollector mass spectrometry were performed on pumice lapilli and volcanic glass separates from Fogo 1563...
The widespread Pliocene (ca. 2 Ma) orthopyroxene-bearing tholeiites represent by far the most voluminous but short-lived magmatic phase of the Cenozoic Iblean volcanic province. We have studied major, volatile (H 2 O, S, and Cl), and light lithophile (Li, Be, and B) elements and 7 Li/ 6 Li and 11 B/ 10 B isotopic ratios of olivine- and orthopyroxene-hosted...
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