Marjanovic, Milena; Satish, Singh; Grevemeyer, Ingo (2020): Bathymetry, gravity, seismic reflection and refraction datasets, and velocity model crossing the Chain Fracture Zone [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.922331
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Abstract:
We provide processed bathymetry and gravity (Free-air anomaly) datasets collected in the equatorial Atlantic during ILAB-SPARC experiment conducted aboard N/O Pourquoi Pas? in Fall 2018. The seismic data sample the oceanic lithosphere extending between the Romanche Transform Fault to the Charcot Fracture Zone.
Refraction data were collected during the ILAB-SPARC experiment. The provided refraction data were recorded on 25 Ocean Bottom Seismometer (OBS data) instruments (from 25 to 50) and span source-receiver offsets from ~-100 km to 100 km.
Reflection (multichannel seismic - MCS data), we provide are sorted as CMP gathers that were used to produce seismic sections for imaging layer 2A. The data were collected during two experiments, using different survey geometries:
1) ILAB_SPARC_CMP.segy (in 5 parts): collected during ILAB_SPARC experiment in 2018, sample the region south of the Chain Fracture Zone. The maximum source-receiver offset is ~6 km. Note that the provided data were interpolated only in the shot domain (data fold 40).
2) TransAtlantic_CMP.segy (provided in two parts): collected during iLAB TransAtlantic survey aboard M/V Western Trident in Spring 2015. The data sample the region between the Chain Fracture ZOne and Romanche Transform Fault. The maximum source-receiver offset provided is ~ 6 km. Finally, we provide our final velocity model obtained by analyzing the OBS data (the data are provided in ascii format (horizontal and vertical grid sizes are 200 m and 50 m, respectively).
Supplement to:
Marjanovic, Milena; Singh, Satish C; Gregory, Emma P M; Grevemeyer, Ingo; Growe, Kevin; Wang, Z; Vaddineni, Venkata; Laurencin, Muriel; Carton, Helene; Gómez de la Peña, Laura; Filbrandt, Christian (2020): Seismic Crustal Structure and Morphotectonic Features Associated With the Chain Fracture Zone and Their Role in the Evolution of the Equatorial Atlantic Region. Journal of Geophysical Research: Solid Earth, 125(10), https://doi.org/10.1029/2020JB020275
Coverage:
Median Latitude: -0.672359 * Median Longitude: -17.405559 * South-bound Latitude: -3.599950 * West-bound Longitude: -18.172321 * North-bound Latitude: 3.899913 * East-bound Longitude: -16.595500
Date/Time Start: 2018-08-26T00:00:00 * Date/Time End: 2018-10-01T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
4 datasets
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Datasets listed in this bundled publication
- Marjanovic, M; Satish, S; Grevemeyer, I (2020): Bathymetry grid of Pourquoi Pas? cruise ILAB-SPARC, Chain Fracture Zone. https://doi.org/10.1594/PANGAEA.922975
- Marjanovic, M; Satish, S; Grevemeyer, I (2020): Free-air anomaly data along profile 1A during cruise ILAB-SPARC, Chain Fracture Zone. https://doi.org/10.1594/PANGAEA.923806
- Marjanovic, M; Satish, S; Grevemeyer, I (2020): Seismic refraction datasets and velocity model during cruise ILAB-SPARC, Chain Fracture Zone. https://doi.org/10.1594/PANGAEA.922330
- Marjanovic, M; Satish, S; Grevemeyer, I (2020): Seismic reflection datasets during cruise ILAB-SPARC and iLAB TransAtlantic, Chain Fracture Zone. https://doi.org/10.1594/PANGAEA.922325