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Oxygen Isotope Geochemistry of Oceanic-Arc Lavas |
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| Authors: | EILER JOHN M; CRAWFORD ANTHONY; ELLIOTT TIM; FARLEY KENNETH A; VALLEY JOHN W; STOLPER EDWARD M |
| Institution: | 1DIVISION OF GEOLOGICAL AND PLANETARY SCIENCES, CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CA 91125, USA 2DEPARTMENT OF GEOLOGY, UNIVERSITY OF TASMANIA, GPO BOX 252C, HOBART, TAS. 7001, AUSTRALIA 3FACULTEIT AARDWETENSCHAPPEN, VRIJE UNIVERSITEIT, DE BOELELAAN 1085, 1081 HV AMSTERDAM, NETHERLANDS 4DEPARTMENT OF GEOLOGY AND GEOPHYSICS, UNIVERSITY OF WISCONSIN, MADISON, WI 53706, USA |
| Abstract: | Variations of oxygen isotope ratios in arc-related lavas canconstrain the contributions of subducted crustal igneous rocks,sediments, and fluids to the sub-arc mantle. We have measuredoxygen isotope ratios in 72 arc and back-arc lavas from fiveocean–ocean subduction zone systems using laser-fluorinationanalyses of olivine and other phenocrysts and glass. Eightypercent of our samples have |
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