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Processed multichannel seismic data from the Galicia Bank and Iberia Abyssal Plain, acquired during the R/V Maurice Ewing survey EW9705 (1995) as part of a joint US-German MCS and wide-angle seismic experiment (ISE 97)
This cruise was part of a joint US-German MCS and wide-angle seismic experiment (ISE 97). The plan was to use a dense instrumented MCS/OBS wide angle seismic profile (56 OBS deployments) and 12 deep-penetrating MCS profiles to study the Galicia Interior Basin/Galicia Bank rifted continental margin and transform boundary with Iberia Abyssal Plain margin segment to the south. Funded by NSF grant OCE9521517.
Sawyer, Dale
Investigator
Rice
Quality
2
The data have been processed/modified to a level beyond that of basic quality control (e.g. final processed sonar data, photo-mosaics).
Data Files
References
Acquisition Information
Documents
Related Data Sets
ISO/XML Metadata
References
Clark, 1999 Along-Strike Variation of a Non-volcanic Rifted Margin: A Concurrent MCS and OBS Investigation of Galicia Bank and the Iberia Abyssal Plain M.S. Thesis .
Henning, 2005 Tectonics of the West Iberia Continental Margin From Seismic Reflection Data Ph.D. Dissertation .
Henning et al., 2004 Exhumed upper mantle within the ocean-continent transition on the northern west Iberia margin: Evidence from prestack depth migration and total tectonic subsidence analyses J. Geophys. Res. 109, B05103. doi: 10.1029/2003JB002526
Perez-Gussinye et al., 2003 Mechanisms of extension at nonvolcanic margins: Evidence from the Galicia interior basin, west of Iberia J. Geophys. Res. 108(B5). doi: 10.1029/2001JB000901
Reston, 2005 Polyphase faulting during the development of the west Galicia rifted margin Earth and Planetary Science Letters 237(3-4). doi: 10.1016/j.epsl.2005.06.019
Zelt et al., 2003 Assessment of crustal velocity models using seismic refraction and reflection tomography Geophys. J. Int. 153(3). doi: 10.1046/j.1365-246X.2003.02027.x
Unger, 2001 Structural and Tectonic Interpretation of Deep Seismic Reflection Data Offshore Spain and Portugal: A Tectonic Rifting Model Ph.D. Dissertation .
Clark et al., 2007 Characterizing the Galicia Bank-Southern Iberia Abyssal Plain rifted margin segment boundary using multichannel seismic and ocean bottom seismometer data J. Geophys. Res. 112. doi: 10.1029/2006JB004581
Download Data Set Metadata Report
XML
MGDS formatted data set xml report containing verbose file and data set level metadata
ISO XML
ISO 19115-compliant xml report containing general data set level metadata
Related Acquisition Information
Seismic Acquisition Parameters
Download as Text: EW9705
EW9705_ACQ001 (Lines: Sequences 1-8)
Source Information
AirGun (BOLT:1500C)
Source Number: 20
Volume (cu in): 8385
Pressure (psi): 2000
Depth (m): 8.5
Distance to Near Channel (m): 37.9
Distance to Antenna (m): 87.4
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 168
Group Spacing (m): 25
Cable Length (m): 4000
Near Channel Number: 160
Nav System
DGPS Magnovox 4200D
WGS84
Acquisition System
Digital
Name: DMS2000
Sample Interval (msec): 2
Details
For Sequences 1 and 7, the Shot Interval was 60s and the Record Length was 25s
For Sequences 2,5,6,8, the Shot Interval was 20s and the Record Length was 16s
For Sequences 3 and 4, the Shot Interval was 40s and the Record Length was 25s
168 channels were originally recorded, 160 channels were MCS, 168 were archived.
EW9705_ACQ002 (Lines: Sequences 9,15-25)
Source Information
AirGun (BOLT:1500C)
Source Number: 20
Volume (cu in): 8385
Pressure (psi): 2000
Depth (m): 8.5
Distance to Near Channel (m): 37.9
Distance to Antenna (m): 87.4
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 172
Group Spacing (m): 25
Cable Length (m): 4100
Near Channel Number: 164
Nav System
DGPS Magnavox 4200D
WGS84
Acquisition System
Digital
Name: DMS2000
Sample Interval (msec): 2
Details
For Sequence 19 (shots 100-441), the Shot Interval was 60s and the Record Length was 25s
For Sequences 17,18,20,21 (shots 101-825),22-25, the Shot Interval was 20s and the Record Length was 16s
For Sequences 9,15,16,19 (shots 442-1269), the Shot Interval was 40s and the Record Length was 25s
For Sequence 21 (shots 826-2616), the Shot Interval was 60s and the Record Length was 16s
172 channels were originally recorded, 164 channels were MCS, 172 were archived.
EW9705_ACQ003 (Lines: Sequences 10-14)
Source Information
AirGun (BOLT:1500C)
Source Number: 20
Volume (cu in): 8385
Pressure (psi): 2000
Depth (m): 8.5
Distance to Near Channel (m): 63.9
Distance to Antenna (m): 87.4
Number of Arrays: 1
Receiver Information
Hydrophone:Streamer
Number of Cables: 1
Channels Per Cable: 40
Group Spacing (m): 25
Cable Length (m): 1000
Near Channel Number: 40
Nav System
DGPS Magnovox 4200D
WGS84
Acquisition System
Digital
Name: DMS2000
Sample Interval (msec): 2
Details
For Sequences 10,12,14, the Shot Interval was 40s and the Record Length was 25s
For Sequences 11 and 13, the Shot Interval was 20s and the Record Length was 16s
172 channels were originally recorded, 40 channels were MCS, 172 were archived.
edu.utexas.ig:ew9705_acq001 (Lines: )
Source Information
AirGun
Receiver Information
NotApplicable
Used Active Tail Buoy: false
Used Compass Birds: false
Nav System
GPS
WGS84
Acquisition System
Digital
Name: DSS 240
Details
Receiver Type: Hydrophone_Streamer; Seismometer_OceanBottom
Source Type: SeismicSource_Gun_Air
Acquisition System Name: DSS 240
Acquisition System Type: digital
Seismic Nav System: GPS
Survey Datum: WGS84
Source to Near Channel (m): null
Antenna to Source (m): 88.7
Number of Channels Recorded: 160
Channel Length (m): 25
Cable Receiver Depth (m): null
Source Volume (cubicInches): 8400
Source Pressure (bars): null
Source Number: 20
Source Depth (m): 8.5 meters
Shot Control: time
Shot Interval (s or m): 40: corresponding to a shot spacing of 100 m.
Compass Birds: no
Tail Buoy Positioning: no
Recording Delay: no
Data Set Documents
OBS
ew9705.OBS_info.csv (1.0kB)
ASCII
Cruise
ew9705.cruiserpt.pdf (2.0MB)
PDF
Data Processing
ew9705.line9ProcessingScheme.pdf (4.7MB)
PDF
EW9705 Documents
Seismic recording log
EW9705_seismic_recording_log.pdf (15.4MB)
PDF
UTIG OBS processing plans
EW9705_OBS_UTIG_processing.pdf (112.0kB)
PDF
Cruise
ew9705.cruiserpt.pdf (2.0MB)
PDF
OBS cruise report by Yosio Nakamura
EW9705.OBScruiserpt_Nakamura.pdf (2.0MB)
PDF
Science cruise report by Dale Sawyer
EW9705_cruise_report_Sawyer.pdf (1.7MB)
PDF
Science party watchstander log
EW9705_sci_watchstander_log.pdf (14.9MB)
PDF
Related Data Sets
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Seismic:Reflection:MCS
Data DOI:
10.1594/IEDA/500143
Processed multichannel seismic data from the Galicia Bank and Iberia Abyssal Plain, acquired during the R/V Maurice Ewing survey EW9705 (1995) as part of a joint US-German MCS and wide-angle seismic experiment (ISE 97)
Locale
File Format
SEGY
Quality
2
Sawyer, Dale
Rice
Clark, 1999
Henning, 2005
Unger, 2001
Processed multichannel seismic data from the Galicia Bank and Iberia Abyssal Plain, acquired during the R/V Maurice Ewing survey EW9705 (1995) as part of a joint US-German MCS and wide-angle seismic experiment (ISE 97)
Locale
File Format
PDF
Quality
2
Sawyer, Dale
Rice
Clark, 1999
Henning, 2005
Unger, 2001
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