Data · collection · 2006
High-resolution chirp seismic reflection data acquired from the Cap de Creus shelf and canyon area, Gulf of Lions, Spain in 2004
Listed in NASA Earthdata CMR
This report consists of high-resolution chirp seismic reflection profiledata from the northern Gulf of Lions, Spain.
Description
These data were acquired in2004 using the Research Vessel Oceanus (USGS Cruise ID: O-1-04-MS). Thedata are available in binary and JPEG image formats.
Binary data arein Society of Exploration Geologists (SEG) SEG-Y format and may bedownloaded for further processing or display. Reference maps andJPEG images of the profiles may be viewed with your Web browser. Marine seismic reflection data are used to image and mapsedimentary and structural features of the seafloor and subsurface.These data were acquired across the shelf and canyon area of the Gulfof Lions, Spain as part of a multinational effort to characterize thegeologic framework and sedimentary environment of the region.The specific objective of this seismic survey is to provide seismicreflection images of the depositional geometry of the upper 50 meters ofsubbottom stratigraphy in order to better understand the mechanisms ofsediment transport and deposition.
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These chirp seismic profiles providehigh-quality images with approximately 20 cm of verticalresolution and up to 80 m of subbottom penetration. Chirp seismic reflection profiles are acquired by means of anacoustic source and a hydrophone array, both contained in a single unittowed in the water behind a survey vessel. The sound source emits ashort (30 ms) swept-frequency (500 to 7200 Hz)acoustic pulse,which propagates through the water and sediment columns.
The acousticenergy is reflected at density boundaries (such as the seafloor orsediment layers beneath the seafloor), and detected by the hydrophonearray, and digitally recorded by the onboard PC-based acquisition system.As the vessel moves, this process is repeated multiple times per second,producing a two-dimensional image of the shallow geologic structurebeneath the ship track. [Summary provided by the USGS.]
Links
Get the data
- pubs.usgs.gov /of/2006/1247/data_table.html ↗
Data tables for the High-resolution chirp seismic reflection data acquired from the Cap de Creus shelf and canyon area, Gulf of Lions, Spain in 2004 data set.
download · from NASA CMR
Documentation and papers
- pubs.usgs.gov /of/2006/1247/interactive_map.html ↗
Download a map service file that you can view in Google Earth for the High-resolution chirp seismic reflection data acquired from the Cap de Creus shelf and canyon area, Gulf of Lions, Spain in 2004 d
documentation · from NASA CMR
- pubs.usgs.gov /of/2006/1247/metadata.html ↗
FGDC metadata for the High-resolution chirp seismic reflection data acquired from the Cap de Creus shelf and canyon area, Gulf of Lions, Spain in 2004 data set.
documentation · from NASA CMR
- pubs.usgs.gov /of/2006/1247/data_aquisition_processing.html ↗
Data Acquisition and Processing information for the for the High-resolution chirp seismic reflection data acquired from the Cap de Creus shelf and canyon area, Gulf of Lions, Spain in 2004 data set.
documentation · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2231550660-CEOS_EXTRA.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2231550660-CEOS_EXTRA.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Sedimentation · Seismic Reflection · SEISMIC REFLECTION PROFILERS · SHIPS
- Inferred from text
- Image 75% · Oceanography 72%
Provenance · 1 source records, 14 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2231550660-CEOS_EXTRA | 10 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3708 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| concepts[instrument].gcmd_instrument:seismic-reflection-profilers | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/coastal-processes/sedimentation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/tectonics/earthquakes/seismic-profile/seismic-reflection | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:ships | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |