Preprints
https://doi.org/10.5194/egusphere-2022-230
https://doi.org/10.5194/egusphere-2022-230
11 May 2022
 | 11 May 2022

Upper lithospheric structure of northeastern Venezuela from joint inversion of surface wave dispersion and receiver functions

Roberto Cabieces, Antonio Villaseñor, Elizabeth Berg, Andrés Olivar-Castaño, Mariano Arnaiz-Rodríguez, Sergi Ventosa, and Ana M. G. Ferreira

Abstract. We use 1.5 years of continuous recordings from an amphibious seismic network deployment in the region of northeast South America and southeast Caribbean to study the crustal and uppermost mantle structure through a joint inversion of surface wave dispersion curves determined from ambient seismic noise and receiver functions. The availability of both ocean bottom seismometers (OBSs) and land stations makes this experiment ideal to determine the best processing methods to extract reliable empirical Green’s functions (EGFs) and construct a 3D shear velocity model. Results show EGFs with high signal-to-noise ratio for land-land, land-OBS and OBS-OBS paths from a variety of stacking methods. Using the EGF estimates, we measure phase and group velocity dispersion curves for Rayleigh and Love waves. We complement these observations with receiver functions, which allow us to perform an H-k analysis to obtain Moho depth estimates across the study area. The measured dispersion curves and receiver functions are used in a Bayesian joint inversion to retrieve a series of 1D shear-wave velocity models, which are then interpolated to build a 3D model of the region. Our results display clear contrasts in the oceanic region across the border of the strike-slip fault system San Sebastian - El Pilar as well as a high velocity region that corresponds well with the continental craton of southeastern Venezuela. We resolve known geological features in our new model, including the Espino Graben and the Guiana Shield provinces, and provide new information about their crustal structures. Furthermore, we image the difference in the crust beneath the Maturin and Guárico Sub-Basin.

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Journal article(s) based on this preprint

18 Nov 2022
Upper-lithospheric structure of northeastern Venezuela from joint inversion of surface-wave dispersion and receiver functions
Roberto Cabieces, Mariano S. Arnaiz-Rodríguez, Antonio Villaseñor, Elizabeth Berg, Andrés Olivar-Castaño, Sergi Ventosa, and Ana M. G. Ferreira
Solid Earth, 13, 1781–1801, https://doi.org/10.5194/se-13-1781-2022,https://doi.org/10.5194/se-13-1781-2022, 2022
Short summary
Roberto Cabieces, Antonio Villaseñor, Elizabeth Berg, Andrés Olivar-Castaño, Mariano Arnaiz-Rodríguez, Sergi Ventosa, and Ana M. G. Ferreira

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-230', Anonymous Referee #1, 20 Jun 2022
    • AC1: 'Reply on RC1', Roberto Cabieces, 15 Oct 2022
  • RC2: 'Comment on egusphere-2022-230', Franck Audemard, 10 Aug 2022
    • AC2: 'Reply on RC2', Roberto Cabieces, 15 Oct 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-230', Anonymous Referee #1, 20 Jun 2022
    • AC1: 'Reply on RC1', Roberto Cabieces, 15 Oct 2022
  • RC2: 'Comment on egusphere-2022-230', Franck Audemard, 10 Aug 2022
    • AC2: 'Reply on RC2', Roberto Cabieces, 15 Oct 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Roberto Cabieces on behalf of the Authors (15 Oct 2022)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (24 Oct 2022) by Caroline Beghein
ED: Publish as is (25 Oct 2022) by CharLotte Krawczyk (Executive editor)
AR by Roberto Cabieces on behalf of the Authors (26 Oct 2022)

Journal article(s) based on this preprint

18 Nov 2022
Upper-lithospheric structure of northeastern Venezuela from joint inversion of surface-wave dispersion and receiver functions
Roberto Cabieces, Mariano S. Arnaiz-Rodríguez, Antonio Villaseñor, Elizabeth Berg, Andrés Olivar-Castaño, Sergi Ventosa, and Ana M. G. Ferreira
Solid Earth, 13, 1781–1801, https://doi.org/10.5194/se-13-1781-2022,https://doi.org/10.5194/se-13-1781-2022, 2022
Short summary
Roberto Cabieces, Antonio Villaseñor, Elizabeth Berg, Andrés Olivar-Castaño, Mariano Arnaiz-Rodríguez, Sergi Ventosa, and Ana M. G. Ferreira
Roberto Cabieces, Antonio Villaseñor, Elizabeth Berg, Andrés Olivar-Castaño, Mariano Arnaiz-Rodríguez, Sergi Ventosa, and Ana M. G. Ferreira

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Latest update: 28 Oct 2024
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The manuscript presents a new 3D shear wave velocity model of the lithosphere of northeastern Venezuela, including new Moho and Vp/Vs maps. Data were retrieved from land and broadband ocean bottom seismometers from the BOLIVAR experiment.