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GSA Special Papers
Formation and Applications of the Sedimentary Record in Arc Collision Zones
Author(s)
Geological Society of America

Volume
436
Copyright:
Geological Society of America
ISBN print:
9780813724362
Publication date:
January 01, 2008
Book Chapter
Basin formation by volcanic arc loading
Author(s)
Dave Waltham
SE Asia Research Group, Department of Geology, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
;
Dave Waltham
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Robert Hall
SE Asia Research Group, Department of Geology, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
;
Robert Hall
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Helen R. Smyth
SE Asia Research Group, Department of Geology, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
;
Helen R. Smyth
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Cynthia J. Ebinger
SE Asia Research Group, Department of Geology, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
Cynthia J. Ebinger
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Published:January 01, 2008
This paper quantifies the flexural subsidence expected from loading by a volcanic arc. The resulting mathematical model shows that the arc width should grow with time and that the subsidence beneath the load can be estimated from the observed arc width at the surface. Application of this model to the Halmahera Arc in Indonesia shows an excellent fit to observations if a broken-plate model of flexure is assumed. The model also gives an excellent fit to data from East Java, also in Indonesia, where it is possible to forward model gravity anomalies. In particular, the depth, location, and width of...
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Index Terms/Descriptors
- Asia
- back-arc basins
- basin analysis
- basins
- Celebes
- Cenozoic
- deposition
- Far East
- flexure
- fore-arc basins
- geophysical methods
- geophysical profiles
- geophysical surveys
- gravity anomalies
- Indonesia
- island arcs
- Java
- loading
- mathematical methods
- mathematical models
- Miocene
- models
- Neogene
- plate tectonics
- sedimentary rocks
- sedimentation
- seismic methods
- seismic profiles
- seismic stratigraphy
- stratigraphic units
- subduction
- subsidence
- surveys
- symmetry
- Tertiary
- volcaniclastics
- volcanoes
- Halmahera Arc
- Halmahera Indonesia
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