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Incorporating teleseismic tomography data into models of upper mantle slab geometry

Dates

Publication Date
Time Period
2014
Time Period
2015
Time Period
2016
Time Period
2017

Citation

Hayes, G., and Portner, D.E., 2018, Incorporating teleseismic tomography data into models of upper mantle slab geometry: U.S. Geological Survey data release, https://doi.org/10.5066/P98Z8OJ2.

Summary

Earthquake-based models of slab geometry are limited by the distribution of earthquakes within a subducting slab, which is often heterogeneous. The fast seismic velocity signature of slabs in tomography studies is independent of the distribution of earthquakes within the slab, providing a critical constraint on slab geometry when earthquakes are absent. In order to utilize this constraint, researchers typically hand-contour images of subducting slabs in tomography models, leading to a subjective final slab model. With this paper, we present an automated procedure for extracting slab geometry from teleseismic tomography volumes that limits this subjectivity and provides constraints on the structure of aseismic segments of slabs. This [...]

Contacts

Point of Contact :
Gavin Hayes
Originator :
Gavin Hayes, Daniel E Portner
Metadata Contact :
GHSC Data Steward
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Earthquake Hazards Program
USGS Mission Area :
Natural Hazards

Attached Files

Click on title to download individual files attached to this item.

Slab_geometry.xml
“Metadata record”
Original FGDC Metadata

View
7.67 KB
README.TXT
“readme file”
2.92 KB
cas_slabguide.grd
“slab guide for Cascadia”
311.91 KB
sam_slab1.0_augmented.grd
“slab guide for South America”
8.85 MB
BSL14_cas_gorda.par
“parameter file for tomographic model for the Gorda slab from Schmandt & Lin 2014”
485 Bytes
BSL14_cas_jdf.par
“parameter file for tomographic model for the Juan de Fuca slab from Schmandt & L”
486 Bytes
DEP17_sam_final.par
“parameter file for tomographic model for the South America slab from Portner et ”
495 Bytes
DNA13_cas.par
“parameter file for tomographic model for the Cascadia slab from Porritt et al. 2”
481 Bytes
MIT16_cas.par
“parameter file for tomographic model for the Cascadia slab from Burdick et al. 2”
492 Bytes
DNA13.tomo
“tomographic model for the Cascadia slab from Porritt et al. 2014”
15.22 MB
MITP_USA_2016MAY.tomo
“tomographic model for the Cascadia slab from Burdick et al. 2017”
58.75 MB
SAM4_P_2017.tomo
“tomographic model for the South America slab from Portner et al. 2017”
30.33 MB
US-SL-2014.tomo
“tomographic model for the Cascadia slab from Schmandt & Lin 2014”
4.52 MB

Purpose

The raw data (tomography models) were created to study mantle structure. The codes were written by the USGS to process these tomography models in order to identify subduction zone slab velocity anomalies.

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P98Z8OJ2

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