Dataset Information

Clustering of arc volcanoes caused by temperature perturbations in the back-arc mantle.

ABSTRACT: 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 mantle temperature. Here we use a simple three-dimensional numerical model to quantify the effects of back-arc temperature perturbations on the mantle wedge flow pattern and sub-arc mantle temperature. Our model calculations show that relatively small temperature perturbations in the back-arc result in vigorous inflow of hotter mantle and subdued inflow of colder mantle beneath the arc due to the temperature dependence of the mantle viscosity. This causes a three-dimensional mantle flow pattern that amplifies the along-arc variations in the sub-arc mantle temperature, providing a simple mechanism for volcano clustering.

SUBMITTER: Lee C

PROVIDER: S-EPMC5493751 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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Clustering of arc volcanoes caused by temperature perturbations in the back-arc mantle.

Lee Changyeol C Wada Ikuko I

Nature communications 20170629

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 mantle temperature. Here we use a simple three-dimensional numerical model to quantify the effects of bac ...[more]

PMID: 28660880

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Dataset Information

Clustering of arc volcanoes caused by temperature perturbations in the back-arc mantle.

Publications

Clustering of arc volcanoes caused by temperature perturbations in the back-arc mantle.

Similar Datasets

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