Propagation of back-arc extension into the arc lithosphere in the southern New Hebrides volcanic arc
نویسندگان
چکیده
منابع مشابه
Morphology and Structure of the Southern Part of the New Hebrides Island Arc System
1) An accretionary prism with a constant width of approximately 75 km does exist; 2) The morphology of this prism varies rapidly along the arc and is linked, firstly to the morphology and structure of the upper part of the dipping plate and, secondly to the presence of volcanic island acting as sediment sources; The island arc and its connecting structural features such as troughs at the rear o...
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........................................................................................................................ 5 ACKNOWLEDGEMENTS ....................................................................................................... 6 INTRODUCTION ................................................................................................................... 7 GEOLOGICALSETTING .....
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Clustering of arc volcanoes in subduction zones indicates along-arc variation in the physical condition of the underlying mantle where majority of arc magmas are generated. The sub-arc mantle is brought in from the back-arc largely by slab-driven mantle wedge flow. Dynamic processes in the back-arc, such as small-scale mantle convection, are likely to cause lateral variations in the back-arc ma...
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In the Mariana convergent margin, large arc volcanoes disappear south of Guam even though the Pacific plate continues to subduct and instead, small cones scatter on the seafloor. These small cones could form either due to decompression melting accompanying back-arc extension or flux melting, as expected for arc volcanoes, or as a result of both processes. Here, we report the major, trace, and v...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2015
ISSN: 1525-2027
DOI: 10.1002/2015gc005717