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ID
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N-1-81-AN
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Also Known As
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Survey_GA-33
SDLS-6
SDLS-7
SDLS-8
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Abstract
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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
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Organization |
Bureau of Mineral Resources (BMR) - now Geoscience Australia
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Project/Theme
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Antarctic Seismic Data Library System (SDLS)
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Chief Scientist
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Howard Stagg
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Activity Type
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Multichannel Seismic
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Platform
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Nella Dan
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Area of Operation
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Prydz Bay, Mac.Robertson Shelf & adjacent continental slope, Southern Ocean
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Bounding Coordinates
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-64.39307
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60.64913 77.92002 |
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-69.45613 |
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Ports
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LEAVE Hobart, Australia
ARRIVE Hobart, Australia
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Dates
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12/01/1981 (JD 335) to 03/31/1982 (JD 090)
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Analog Materials
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No analog holdings.
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Information Specialist
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Crew
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Pat Quilty
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Cruise leader (Australian Antarctic Division)
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Howard Stagg
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Chief scientist (BMR, now Geoscience Australia)
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J.B. Jensen
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Ship Captain
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B. Jones
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Technician (BMR)
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P. McCormack
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Technician (National Mapping Division)
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L. Miller
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Technician (BMR)
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S. Parker
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Technician (BMR)
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G. Price
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Technician (BMR)
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S. Scherl
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Geophysicist (BMR)
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Equipment Used
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Reflection seismic
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magnetometer
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echo-sounder
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transit satellite
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Purpose
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Understand geology of part of the margin of East Antarctica
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Information to be Derived
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The structure and origin of Prydz Bay and the MacRobertson Shelf.
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Summary
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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.
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Notes
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Reflection seismic, magnetics, bathymetry along regularly-spaced tracks on the
continental shelf and slope.
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Publications
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Stagg, H.M.J., 1985 - The structure and origin of Prydz Bay and the MacRobertson
Shelf, East Antarctica. Tectonophysics, 114, 315-40.
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Got Help?
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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.
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