Lithospheric Contributions to Arc Magmatism: Isotope Variations Along Strike in Volcanoes of Honshu, Japan

Major chemical exchange between the crust and mantle occurs in subduction zone environments, profoundly affecting the chemical evolution of Earth. The relative contributions of the subducting slab, mantle wedge, and arc lithosphere to the generation of island arc magmas, and ultimately new continent...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1996-06, Vol.272 (5267), p.1464-1468
Main Authors: Kersting, Annie B., Arculus, Richard J., Gust, David A.
Format: Article
Language:English
Subjects:
Basalt
Crystalline rocks
Earth
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geology
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Isotope geochemistry
Isotope geochemistry. Geochronology
Isotopes
Lava
Lithospheres
Magma
Magmatism
Mantle
Organic Chemistry
Petrology
Plate tectonics
Sediments
Strikes
Tectonics
Volcanoes
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Summary:Major chemical exchange between the crust and mantle occurs in subduction zone environments, profoundly affecting the chemical evolution of Earth. The relative contributions of the subducting slab, mantle wedge, and arc lithosphere to the generation of island arc magmas, and ultimately new continental crust, are controversial. Isotopic data for lavas from a transect of volcanoes in a single arc segment of northern Honshu, Japan, have distinct variations coincident with changes in crustal lithology. These data imply that the relatively thin crustal lithosphere is an active geochemical filter for all traversing magmas and is responsible for significant modification of primary mantle melts.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.272.5267.1464