EW0501 Interpretation:Geologic

Moho interface models (netCDF format) from a 2005 Chicxulub Crater seismic study (EW0501)

These Moho interface models were derived from a seismic velocity model generated for the Chicxulub Crater. The data were acquired in 2005 using airgun shots from Maurice Ewing cruise EW0501 that were recorded by OBSs and land seismometers. The interface grids are in GMT-compatible netCDF format with grid x=latitude, y=longitude, z=depth in km. The grid called moho_flattest_masked_ll.grd represents the inversion for the flattest (most horizontal) interface that fits data. The grid called moho_smoothest_masked_ll.grd is the inversion for the smoothest interface that fits data. The data set was generated as part of the project called: Imaging and Modeling Impact Generated Deformation at the Chicxulub Crater, Joint US/UK/Mexico Investigation and IODP Site Survey. Funding was provided through NSF award OCE02-21101.

Christeson, Gail

Investigator

Gulick, Sean

Investigator

UTIG

Morgan, Joanna

Investigator

Imperial College London

Barton, Penny

Investigator

University of Cambridge

Device Info

Seismic:OBS

Platform

Maurice Ewing (Array)

LDEO

Awards

OCE02-21101

Data DOI

10.60521/331877

Quality

The data have been processed/modified to a level beyond that of basic quality control (e.g. final processed sonar data, photo-mosaics).

Report Incorrect Information

Data Files

References

Documents

Data Citation Information

ISO/XML Metadata

Seismic Acquisition Parameters

Download as Text: EW0501

EW0501_ACQ001 (Lines: 1R,2,2A(partial),2R,4A-4C,6,6A,8,10;Sequence 1-9(shotpoint 391))

Source Information

AirGun (BOLT:1500C)

Volume (cu in): 6947

Pressure (psi): 2000

Depth (m): 6

Shot Interval (m): 50

Distance to Near Channel (m): 180

Distance to Antenna (m): 55.3

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 480

Channels Recorded: 480

Group Spacing (m): 12.5

Cable Length (m): 6000

Cable Depth (m): 7

Near Channel Number: 480

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

TASMON P(Y)-code GPS

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 480

Sample Interval (msec): 2

Record Length (sec): 14.336

Details

Source Number = 20

There was a 25 min source ramp up from 1 to 20 guns at the start of each window of operation. See EW0501.cruiserpt.pdf for details

EW0501_ACQ002 (Lines: 2A(partial); Sequence 9(shotpoints 421-543))

Source Information

AirGun (BOLT:1500C)

Volume (cu in): 6947

Pressure (psi): 2000

Depth (m): 6

Shot Interval (m): 50

Distance to Near Channel (m): 12

Distance to Antenna (m): 55.3

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 480

Channels Recorded: 480

Group Spacing (m): 12.5

Cable Length (m): 6000

Cable Depth (m): 7

Near Channel Number: 480

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

TASMON P(Y)-code GPS

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 480

Sample Interval (msec): 2

Record Length (sec): 14.336

Details

Source Number = 20

There was a 25 min source ramp up from 1 to 20 guns at the start of each window of operation. See EW0501.cruiserpt.pdf for details.

EW0501_ACQ003 (Lines: 1,2B,3-3R,4D-4R,5-5R,6B-6RA,7R,9,11B-25,OBS; Sequences 10-40)

Source Information

AirGun (BOLT:1500C)

Volume (cu in): 6947

Pressure (psi): 2000

Depth (m): 6

Shot Interval (m): 50

Distance to Near Channel (m): 112.5

Distance to Antenna (m): 55.3

Number of Arrays: 1

Receiver Information

Hydrophone:Streamer

Number of Cables: 1

Channels Per Cable: 480

Channels Recorded: 480

Group Spacing (m): 12.5

Cable Length (m): 6000

Cable Depth (m): 7

Near Channel Number: 480

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

TASMON P(Y)-code GPS

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 480

Sample Interval (msec): 2

Record Length (sec): 14.336

Details

Source Number = 20

There was a 25 min source ramp up from 1 to 20 guns at the start of each window of operation. See EW0501.cruiserpt.pdf for details.

edu.utexas.ig:ew0501_acq001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: false

Used Compass Birds: false

Nav System

Tasmon P-Code GPS

WGS84

Acquisition System

Digital

Name: Syntrak

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: Syntrak

Acquisition System Type: digital

Seismic Nav System: Tasmon P-Code GPS

Survey Datum: WGS84

Source to Near Channel (m): 180: jan20-26, 15: 56 (1st part 2A); 13: for Jan 26, 16:07-16:56; 112.5: for Jan 26, 17:26-Feb 17. Note: Spectra calculated exact source receiver locations which were then recorded in UK00A format files

Antenna to Source (m): 55.3

Number of Channels Recorded: 480

Channel Length (m): 12.5

Cable Receiver Depth (m): 7

Source Volume (cubicInches): 6947

Source Pressure (bars): 138

Source Number: 20

Source Depth (m): 6

Shot Control: distance

Shot Interval (s or m): 50

Compass Birds: no

Tail Buoy Positioning: no

Recording Delay: no

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