Name: Raw high-resolution multi-channel seismic reflection (MCS) field data from the CORE-VTRCC cruise (2021)
Published: 2024
License: Creative Commons Attribution 4.0 International Public License [CC BY 4.0]

Citation:

Tagliaro, Gabriel, et al., (2024), Raw high-resolution multi-channel seismic reflection (MCS) field data from the CORE-VTRCC cruise (2021). Marine Geoscience Data System (MGDS). doi:10.26022/IEDA/331494

Title:

Raw high-resolution multi-channel seismic reflection (MCS) field data from the CORE-VTRCC cruise (2021)

Abstract:

This data set consists of raw high-resolution multi-channel seismic reflection (MCS) field data collected in 2021 over the Vitoria Trindade Ridge and Columbia Channel during research cruise CORE-VTRCC on naval vessel Nho Cruzeiro do Sul. The MCS data was acquired using a sparker seismic source with 800 tips model Geo-Source 800, up to 7 kJ energy power supply (GeoSpark 2000X) and a 48-channel streamer, all from the Geo Marine Survey Systems. Seismic acquisition and SEG-Y conversion was performed with the GeoRecorder software, also from Geo Marine Survey Systems. The Geo-Source 800 used a negative discharge for seismic pulse generation which results in a more stable seismic signature with a frequency range between 200 – 3000 Hz, centered at ~1 kHz. The streamer was composed of three hydrophones per channel, with a total active length of 150 m and 2 x 25 m cable stretches, to make a total of 200 m of streamer deployment. Channel distance in the streamer is 3.125 m and channel sampling occurred at 10 kHz. Geographic geometry was supplied by a DGPS antenna placed atop the seismic source configured with the WGS-84 ellipsoid and UTM projection zone 23S. Geometry distance averaged 5 m between source and streamer (dx) and ~20 m between source and first channel (dy). The source was placed at 1.5 m water depth and the streamer was at 0.5 m water depth. Energy levels and trigger interval for pulse generation varied across the survey depending on the bathymetric profile. Vessel velocity during seismic acquisition averaged 4 knots. See additional information in the associated Methodology report. These raw field MCS files are in SEG-Y format. Funding for this work was provided through FAPESP awards 2016/24946-9 and 2020/08847-6, and through the Brazilian Navy program PROAMAZONIA AZUL.

Creator(s):

Tagliaro, Gabriel

Gama, Mateus

Britzke, Adolfo

Louro, Vinicius

Bauli, Pedro

Patines, Gabriela

Bonifatto, Gabrielle

Vieira, Ana

Silva, Beatriz

Boni, Geandré

Silva, Luan

Sergipe, Paula

Silva, Raylla

Dos Santos, Sarah

Caram, Tainá

Pereira, Tayná

Jovane, Luigi

Date Available:

2024-01-22

Date Created:

2024-01-23

Data Type(s):

Seismic:Reflection:MCS

Resource Type:

Dataset

File Format(s):

application/seismic-segy

Data Curated by:

Marine Geoscience Data System (MGDS)

Version:

Language:

License:

Creative Commons Attribution 4.0 International Public License [CC BY 4.0] URI: https://creativecommons.org/licenses/by/4.0/

Data DOI: 10.26022/IEDA/331494

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