www.elsevier.com/locate/epsl Slab devolatilization and Os and Pb mobility in the mantle wedge of the Kamchatka arc

• Main Authors: A. Saha A, A. R. Basu A, S. B. Jacobsen B, R. J. Poreda A, Q. -z. Yin B, G. M. Yogodzinski C, E. Boyle, Os
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2005
• Subjects: Os; Pb isotopes; slab devolatilization; mantle-wedge; arc volcanoes; Kamchatka Peninsula; Kamchatka
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.311; http://www.ees.rochester.edu/tims/publications/2005-EPSL-OsPbKamchatkaArc-AnikiBasuetal.pdf

Os-, Nd-, and Pb-isotope measurements were performed on a suite of eleven Kamchatka peridotite mantle xenoliths in volcanics from the southern (Avachinsky) and central (Sheveluch and Kharchinsky) segments of the Kamchatka peninsula. Peridotites with higher Os content (1.3–5.2 ppb) show a narrow 187 Os / 188 Os range between 0.1182 and 0.1272 while the xenoliths with lower Os content (b1 ppb) show a wider variation and more radiogenic 187 Os / 188 Os values (0.1287–0.1585).