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Supporting Information: Upper Plate Stress Controls the Distribution of Mariana Arc Volcanoes [dataset] Open Access

We present a spatial analysis of volcano distribution and morphology in the young, intra-oceanic Mariana Arc. Both the quality of fit to and the divergence from idealised models indicate that volcanic centres are arranged into five great circle segments, rather than a single or multiple small circles. The alignment of magmatic centres suggests that magma transport is controlled by the stress regime in the deep crust and shallow lithospheric mantle of the Philippine Sea Plate, into which the arc is emplaced, and that arc-normal tension is the dominant process operating at such depths along the whole arc. Volcano morphologies indicate that the stress regime in the shallow crust varies between arc-normal extension and compression, which also implies that the stress field can vary with depth in the arc lithosphere. We show that this vertical stress partitioning can be related to the changing dip of the subducting Pacific Plate and its coupling distance with the Philippine Sea Plate. The variation in stress regime is consistent with both the distribution of seismicity in the Philippine Sea Plate and with the structural fabrics of the non-volcanic part of the plate margin to the south. Our analysis suggests that the upper plate exerts the principal control on the distribution of volcanoes in the Mariana Arc. Where the stress regime in the deep crust and shallow lithospheric mantle is sufficiently concentrated then a distinct volcanic front is produced.

Descriptions

Resource type
Dataset
Contributors
Creator: Andikagumi, Harisma 1
Creator: Macpherson, Colin G. 1
Contact person: Macpherson, Colin G. 1
Creator: McCaffrey, Kenneth J. W. 1
1 Durham University, UK
Funder
Indonesia Endowment Fund for Education
Research methods
Other description
Keyword
Mariana Arc
Volcanoes
Lithosphere
Stress controls
Subject
Mariana Arc--Volcanoes
Plate tectonics--Stress
Location
Language
English
Cited in
Identifier
ark:/32150/r179407x18p
Rights
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA)

Publisher
Durham University
Date Created

File Details

Depositor
H. Andikagumi
Date Uploaded
Date Modified
30 May 2019, 11:05:26
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Characterization
File format: zip (ZIP Format)
Mime type: application/zip
File size: 9135
Last modified: 2019:05:28 10:59:07+01:00
Filename: Supporting_Information-Upper_Plate_Stress_Controls_the_Distribution_of_Mariana_Arc_Volcanoes.zip
Original checksum: 8b12bb269c63527c7048604c20d172fa
Activity of users you follow
User Activity Date
User N. Syrotiuk has updated Supporting Information: Upper Plate Stress Controls the Distribution of Mariana Arc Volcanoes [dataset] about 1 year ago
User N. Syrotiuk has updated Upper Plate Stress Controls: the Distribution of Mariana Arc Volcanoes [dataset] about 1 year ago
User N. Syrotiuk has updated Upper Plate Stress Controls: the Distribution of Mariana Arc Volcanoes [dataset] about 1 year ago