MGL0812 Data - Marine Geoscience Data System

Marine Geoscience Data System

MGL0812 Interpretation:Geologic

Ridge2000:Funded

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Axial Magma Lens horizon from a 3-D seismic volume for the segment south of the East Pacific Rise 9º50'N eruption area

The data set contains gridded picks of the Axial Magma Lenses (AMLs) located south of the East Pacific Rise 9º50'N eruption area. The horizons are extracted from the pre-stack depth migrated seismic volume collected during the MGL0812 experiment. The details on the processing are provided in Marjanovic et al., 2023; 2024. The points are provided on a 25m by 25 m grid. The file is given in ASCII format and contains three columns: longitude and latitude in decimal degrees and depth below the sea surface to AML in meters. The data are picked in OpendTect (open source software).

Marjanovic, Milena

Investigator

IPGP

Device Info

Seismic:MCS

Platform

Marcus G. Langseth (Array)

LDEO

Data DOI

10.60521/331596

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).

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Data Files

References

Documents

Data Citation Information

Related Data Sets

ISO/XML Metadata

Seismic Acquisition Parameters

Download as Text: MGL0812

MGL0812_ACQ001 (Lines: )

Source Information

AirGun (BOLT:1500LL)

Source Number: 18

Volume (cu in): 3300

Pressure (psi): 2000

Depth (m): 7.5

Shot Interval (m): 37.5

Distance to Near Channel (m): 200

Distance to Antenna (m): 299.57

Number of Arrays: 2

Source Array Separation (m): 75

Receiver Information

Hydrophone:Streamer (SERCEL:Sentry)

Number of Cables: 4

Channels Per Cable: 468

Channels Recorded: 1872

Group Spacing (m): 12.5

Cable Spacing (m): 150

Cable Length (m): 5850

Cable Depth (m): 10

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

Cnav-primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Sample Interval (msec): 2

Record Length (sec): 10

Details

18 guns each source array

Near Channel Number for each streamer is 468, 936, 1404, 1872

Record Length for Sequence 1 (AXIS1) is 8 seconds. The rest of the lines were recorded for 10 seconds. Cable Depth is 7.5m for Sequence 1, 2, 3, 4 (AXIS1, AXIS2, AXIS3, AXIS2R1), 15m for Sequence 5 (Transit1). Cable Depth was 10m for the rest of the lines

Source to Near Channel Distance is given as an approximation, use P1/P2 files for greater accuracy.

org.marine-geo:MGL0812_ACQ001 (Lines: )

Source Information

AirGun

Receiver Information

Hydrophone:Streamer

Used Active Tail Buoy: true

Used Compass Birds: true

Nav System

Cnav-primary

WGS84

Acquisition System

Digital

Name: Syntron Syntrak 960

Details

Receiver Type: Hydrophone_Streamer

Source Type: SeismicSource_Gun_Air

Acquisition System Name: Syntron Syntrak 960

Acquisition System Type: digital

Seismic Nav System: Cnav-primary

Survey Datum: WGS84

Source to Near Channel (m): null

Antenna to Source (m): 299.57

Number of Channels Recorded: 1872

Channel Length (m): 12.5

Cable Receiver Depth (m): 7.5: sequence 1, 2, 3, 4 (AXIS1, AXIS2, AXIS3, AXIS2R1); 15: sequence 5 (Transit1); 10: rest of lines

Source Volume (cubicInches): 3300

Source Pressure (bars): 138

Source Number: 36

Source Depth (m): 7.5

Shot Control: distance

Shot Interval (s or m): 37.5

Compass Birds: yes

Tail Buoy Positioning: yes

Recording Delay: no

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