Cordell, Darcy; Unsworth, Martyn J; Diaz, Daniel; Reyes-Wagner, Valentina; Currie, Claire A; Hicks, Stephen P (2019): Maule MT EDI data and resistivity model profile [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.899725, Supplement to: Cordell, D et al. (2019): Fluid and Melt Pathways in the Central Chilean Subduction Zone Near the 2010 Maule Earthquake (35–36°S) as Inferred From Magnetotelluric Data. Geochemistry, Geophysics, Geosystems, 20(4), 1818-1835, https://doi.org/10.1029/2018GC008167
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The subduction zone of central Chile (36° S) has produced some of the world's largest earthquakes and significant volcanic eruptions. Understanding the fluid fluxes and structure of the subducting slab and over-riding plate can provide insight into the tectonic processes responsible for both seismicity and magmatism. Magnetotellurics (MT) is a geophysical method which is sensitive to conductive anomalies (e.g. partial melt and brines) in the subsurface. This dataset includes MT EDI data files for 38 sites collected along a profile in central Chile and western Argentina in 2016 and 2017. It includes 19 long period (10 s to 10000 s) MT stations and 19 broadband (0.001 s to 1000 s) MT stations. Four of the broadband MT sites were collected by Alterra Power Corp (now Innergex Renewable Energy Inc.) labelled MU-002, MU-003, MU-011, and MU-019 (Hickson et al., 2011). Four of the long period sites in Argentina are taken from Burd et al. (2014). This dataset also includes two geo-referenced 2-D resistivity models and the inversion parameters used to produce the model. The nonlinear conjugate gradient algorithm of Rodi and Mackie (2001) was used to produce this model. The first is the unconstrained case where no slab tear was imposed (MODEL_UNCONSTRAINED). In this folder is the geo-referenced model (longitude, latitude, depth (km b.s.l.), resistivity) as well as a folder containing the inversion input files. The second is the constrained case where a slab tear was imposed (MODEL_CONSTRAINED). This also includes a geo-referenced model (longitude latitude depth resistivity) text file and a folder containing the inversion input files.
Related to:
Burd, A I; Booker, J R; Mackie, Randall L; Favetto, A (2014): Three-dimensional electrical conductivity in the mantle beneath the Payún Matrú Volcanic Field in the Andean backarc of Argentina near 36.5°S: evidence for decapitation of a mantle plume by resurgent upper mantle shear during slab steepening. Geophysical Journal International, 198(2), 812-827, https://doi.org/10.1093/gji/ggu145
Hickson, C F; Ferraris, F; Rodriquez, C; Sielfeld, G; Henriquez, R; Gislason, T; Selters, J; Benoit, D; White, P; Southon, J; Ussher, G; Charroy, J; Smith, Andrew; Lovelock, B; Lawless, J; Quinlivan, P; Smith, L (2011): The Mariposa Geothermal System, Chile. GRC Trans., 35, 817-826
Rodi, William; Mackie, Randall L (2001): Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion. Geophysics, 66, 174-187, https://doi.org/10.1190/1.1444893
Coverage:
Latitude: -36.000000 * Longitude: -70.000000
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File name | File name | Cordell, Darcy | |||
| 2 | File format | File format | Cordell, Darcy | |||
| 3 | File size | File size | kByte | Cordell, Darcy | ||
| 4 | Uniform resource locator/link to file | URL file | Cordell, Darcy |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
12 data points