Archive · dataset · 2020
Bathymetry, gravity, seismic reflection and refraction datasets, and velocity model crossing the Chain Fracture Zone
Listed in PANGAEA
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.
Description
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.
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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).
Links
Where it is published
- DOI doi.org/10.1594/pangaea.922331 ↗
DOI / persistent id · from PANGAEA
Catalogue records · 1
- OAI-PMH record ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=oai_dc&identifier=o… ↗
metadata API · from PANGAEA
Topics
- From keywords
- Earth & Environmental Science
- Inferred from text
- Imaging 75%
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| PANGAEA | oai:pangaea.de:doi:10.1594/PANGAEA.922331 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · PANGAEA | connector:pangaea@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · PANGAEA | connector:pangaea@1.0.0 | |
| concepts[modality].local:modality:imaging | enrichment · PANGAEA | keyword-concept-rules@1.0.0 | title+description (75%) |
| description | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/description |
| license | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/rights |
| publication_date | source · PANGAEA | connector:pangaea@1.0.0 | |
| spatial | source · PANGAEA | connector:pangaea@1.0.0 | |
| title | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/title |