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Mapping geologic features onto subducted slabs
- Source :
- Geophysical journal international, 2019, Vol.219(2), pp.725-733 [Peer Reviewed Journal], Geophysical Journal International
- Publication Year :
- 2019
- Publisher :
- Oxford Academic, 2019.
-
Abstract
- SUMMARY Estimating the location of geologic and tectonic features on a subducting plate is important for interpreting their spatial relationships with other observables including seismicity, seismic velocity and attenuation anomalies, and the location of ore deposits and arc volcanism in the over-riding plate. Here we present two methods for estimating the location of predictable features such as seamounts, ridges and fracture zones on the slab. One uses kinematic reconstructions of plate motions, and the other uses multidimensional scaling to flatten the slab onto the surface of the Earth. We demonstrate the methods using synthetic examples and also using the test case of fracture zones entering the Lesser Antilles subduction zone. The two methods produce results that are in good agreement with each other in both the synthetic and real examples. In the Lesser Antilles, the subducted fracture zones trend northwards of the surface projections. The two methods begin to diverge in regions where the multidimensional scaling method has its greatest likely error. Wider application of these methods may help to establish spatial correlations globally.
- Subjects :
- Geochemistry & Geophysics
010504 meteorology & atmospheric sciences
Seamount
Volcanism
0404 Geophysics
Induced seismicity
010502 geochemistry & geophysics
DEPOSITS
01 natural sciences
FRACTURE-ZONES
Plate motions
CENTRAL ATLANTIC
Geochemistry and Petrology
0909 Geomatic Engineering
Subduction zone processes
KINEMATICS
TECTONIC EVOLUTION
0105 earth and related environmental sciences
geography
geography.geographical_feature_category
Science & Technology
Subduction
Oceanic transform and fracture zone processes
Tectonics
INSIGHTS
RIDGE
Geophysics
0403 Geology
Ridge
PLATE
Physical Sciences
Slab
Fracture (geology)
Geology
Seismology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Geophysical journal international, 2019, Vol.219(2), pp.725-733 [Peer Reviewed Journal], Geophysical Journal International
- Accession number :
- edsair.doi.dedup.....d1d4d51864cbfbbb3ae22271b745031f