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USGS CMG N-1-81-AN Metadata

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ID N-1-81-AN
Also Known As Survey_GA-33
SDLS-6
SDLS-7
SDLS-8
Abstract Bureau of Mineral Resources (BMR); now Geoscience Australia. Chief Scientist: Howard Stagg. Multichannel Seismic data (Reflection seismic, magnetometer, echo-sounder, transit satellite) of field activity N-1-81-AN in Prydz Bay, Mac.Robertson Shelf & adjacent continental slope from 12/01/1981 to 03/31/1982
Organization Bureau of Mineral Resources (BMR) - now Geoscience Australia
Project/Theme Antarctic Seismic Data Library System (SDLS)
Chief Scientist Howard Stagg
Activity Type Multichannel Seismic
Platform Nella Dan
Area of Operation Prydz Bay, Mac.Robertson Shelf & adjacent continental slope, Southern Ocean
Bounding Coordinates
-64.39307
60.64913     77.92002
-69.45613
Ports LEAVE Hobart, Australia
ARRIVE Hobart, Australia
Dates 12/01/1981 (JD 335) to 03/31/1982 (JD 090)
Analog Materials No analog holdings.
Information Specialist
Howard Stagg
Crew
Pat Quilty Cruise leader (Australian Antarctic Division)
Howard Stagg Chief scientist (BMR, now Geoscience Australia)
J.B. Jensen Ship Captain
B. Jones Technician (BMR)
P. McCormack Technician (National Mapping Division)
L. Miller Technician (BMR)
S. Parker Technician (BMR)
G. Price Technician (BMR)
S. Scherl Geophysicist (BMR)
Equipment Used
Reflection seismic
magnetometer
echo-sounder
transit satellite
Purpose
Understand geology of part of the margin of East Antarctica
Information to be Derived
The structure and origin of Prydz Bay and the MacRobertson Shelf.
Summary
Approximately 5000 km of 3-fold and 6-fold seismic
reflection data, as well as magnetic and gravity data were
acquired along profiles of the Antarctic continental shelf and
upper slope from 60-77 deg E, and south of 66 deg S.

The seismic source consisted of a single 500 cu in Bolt airgun pressurised to 2000 psi fired at an interval of 25 or 50 metres.

The receiver consisted of a Fairfield Industries 6-channel hydrophone streamer with 6 x 50 metre groups.

The data were recorded on a BMR-designed and built recording system in SEG-Y format. The record length was 8 seconds.

The seismic data are available through the SCAR (Scientific Committee on Antarctic Research) Seismic Data Library System, or from Geoscience Australia.

Magnetic data were recorded from a single channel proton precession magnetometer.

Bathymetric data were recorded from a 3.5 kHz echo-sounder.

Navigation data were recorded directly from a Tracor navigation system which uses the TRANSIT navigation satellites.

Magnetic, bathymetry and navigation data were recorded at a 10 second acquisition rate, with data being processed post-survey and saved at a 1 minute interval.

Notes
Reflection seismic, magnetics, bathymetry along regularly-spaced tracks on the 
continental shelf and slope.
Publications
Stagg, H.M.J., 1985 - The structure and origin of Prydz Bay and the MacRobertson 
Shelf, East Antarctica.  Tectonophysics, 114, 315-40.
Got Help? For N-1-81-AN, we would appreciate any information on -- analog materials, contract, days at sea, dive count, funding, kms of navigation, national plan, NGDC Info, owner, project number, scanned materials, seismic description, station count, station description, submersible, tabulated info.
Type Webpage KMZ Arc         Metadata        
Metadata data     txt  data  FAQ  xml
Navigation data nav    
Times   050.times    

N-1-81-AN location map of where navigation 

equipment operated
N-1-81-AN location map of where navigation 

equipment operated

 
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