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Metadata
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ID
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L-2-84-AN
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Abstract
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United States Geological Survey, Menlo Park, California.
Chief Scientists: Alan Cooper, Fred Davey. Geological and
Geophysical data (3dot5khz, 12khz, gradiometer, uniboom,
airgunmonitor, airgun, sonobuoy, gravitycore, chaindredge,
dartcore, magnetics, Digitrack, heatflow,
integratednavigation, transitsatellite, 24channel) of field
activity L-2-84-AN in Antarctica from 02/03/1984 to
03/03/1984
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Organization
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United States Geological Survey, Menlo Park, California
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Chief Scientist
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Alan Cooper
Fred Davey
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Activity Type
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Geological and Geophysical
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Platform
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Samuel Phillips Lee
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Area of Operation
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Antarctica
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Location map
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Bounding Coordinates
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-43.59192
163.00166 -173.37114
-77.64513
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Dates
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02/03/1984 (JD 034) to 03/03/1984 (JD 063)
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Analog Materials
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list
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Index maps
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Information Specialist
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Crew
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Aaron Dunwald
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Chief Engineer
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Al McClenaghan
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Ship Captain
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Alan Cooper
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Chief Scientist
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Andy Stevenson
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Geologist
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Brian Edwards
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Geologist
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Dave Howell
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Geologist
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Dennis Mann
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Chief Watchstander
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Donna Blackman
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Watchstander
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Erk Reimnitz
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Geologist
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Fred Davey
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Chief Scientist
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Herman Karl
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Geologist
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Holly Ryan
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Watchstander
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Jim Vaughan
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Chief Engineer
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Joe Edwards
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Mechanical Technician
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John Behrendt
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Geophysicist
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John Rapp
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Geochemist
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Kaye Kinoshita
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Navigator
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Kevin O'Toole
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Mechanical Technician
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Pat Moore
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Chief Mate
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Roy Fields
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Electronics Technician
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Shawn Dadisman
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Dafe Curator
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Skip Pelletier
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Watchstander
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Equipment Used
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3dot5khz
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12khz
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gradiometer
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uniboom
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airgunmonitor
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airgun
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sonobuoy
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gravitycore
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chaindredge
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dartcore
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magnetics
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Digitrack
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heatflow
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integratednavigation
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transitsatellite
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24channel
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Information to be Derived
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Seismic reflection profiles, gravity, magnetics, lithology,
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and bathymetry.
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Summary
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Approximately 2,350-line km of multichannel
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seismic-reflection data, as well as 4,500 km of other geophysical
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profile data including gravity, magnetic gradiometer, and
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echo-sounding profiles for the western Ross Sea, Antarctica
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were collected.
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The seismic source consisted of a tuned five-airgun array
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totaling 1,311 cu.in. pressurized to 1,900 psi, towed at a
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depth of 10.5 m.
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The receiver consisted of a 24-channel
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hydrophone streamer, with 100-m group lengths containing 60
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hydrophones in each group.
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The streamer was towed at a
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depth of 12.5 m.
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The data were recorded with a GUS Model
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HDDR-4200 recording system.
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All lines were recorded to 12
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sec, with exception of Line 407 (15 sec) and Line 419 (8
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sec).
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Magnetic data were recorded continuously with a
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Geometrics proton-procession gradiometer to remove the large
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temporal magnetic variations commonly recorded at polar
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latitudes.
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The gradiometer system consisted of two proton-precession
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magnetometers separated horizontally by 500 ft
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(152 m) with the forward sensor lying 225 m aft of the ship.
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Both sensors were towed at a depth of approximately 20-40m.
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Data were sampled at 4-sec intervals.
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Gravity data were
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recorded continuously with a LaCoste and Romberg sea
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gravimeter (S53) on a two-axis stabilized platform.
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The data were collected at 20-sec intervals and subsequently
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desampled to 2 min or greater for plotting and modeling.
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NGDC Overview
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! Converted to time format with year at start.
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!
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DATA COLLECTION OVERVIEW (use NGDC GEODAS CD to retrieve data)
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MCG Data Collection ID --- L284AN
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Institution Data Collection ID --- L284AN
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NGDC ID --- 06050069
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Funding --- (unspecified)
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Project, Cruise & Leg --- ANTARCTICA - ROSS SEA
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Study region --- -43.00000,-78.00000,+163.00000,-173.00000
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Chief Scientist(s) --- ALAN COOPER,FRED DAVEY
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Date field data collection started --- 02/03/84 LV MCMURDO
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Date field data collection ended --- 03/03/84 ARRIVE LYTTLETON, N.Z.
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Parameters surveyed ---
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Bathymetry: surveyed, contained in data file
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Magnetics: surveyed, contained in data file
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Gravity: surveyed, contained in data file
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High-resolution seismics: (unspecified)
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Deep penetration seismics: (unspecified)
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Format --- (I1,A8,F5.2,4I2,F5.3,F8.5,F9.5,I1,F6.4,F6.1,I2,i1,3F6.1,I1,F5.1,F6.0,F7.1,F6.1,F5.1,A8,4I1)
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Date of data input to NGDC --- 08/05/87
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Contributing institution --- USGS Branch of Pacific Marine Geology
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Country --- United States
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Navigation instrumentation --- NAV SATELLITE / INTEGRATED NAV
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Position determination method --- (unspecified)
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Bathymetry instrumentation --- 12KHZ
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Additional forms of bathymetric data --- ANALOG
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General rate of bathymetry in file --- 0.9 minutes
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General collection rate of bathymetry --- (unspecified)
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Assumed sound velocity --- (unspecified)
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Bathymetric datum code --- No correction applied (sea level)
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Bathmetry interpolation scheme --- (unspecified)
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Magnetics instrumentation --- (unspecified)
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Additional forms of magnetics data --- (unspecified)
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General rate of magnetics in file --- 0.9 minutes
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General collection rate of magnetics --- (unspecified)
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Magnetic sensor tow distance --- (unspecified)
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Magnetic sensor depth --- (unspecified)
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Two sensor horizontal separation --- (unspecified)
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Residual magnetics reference field --- (unspecified)
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Method of applying residual field --- (unspecified)
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Gravity instrumentation --- SHIPBOARD GRAVITY METER
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Additional forms of gravity data --- ANALOG RECORDS
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General rate of gravity in file --- 0.7 minutes
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General collection rate of gravity --- (unspecified)
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Theoretical gravity formula --- (unspecified)
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Reference system --- (unspecified)
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Corrections applied --- (unspecified)
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Starting land tie --- (unspecified)
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Ending land tie --- (unspecified)
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Seismic instrumentation --- 3.5KHZ,24 CHAN,SNGL CHAN AIRGUN,UNIBOOM
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Formats of seismic data --- ANALOG
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Notes ---
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SONOBOUY
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Publications
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Davey, F.J., and Cooper, A.K., 1984, U.S.G.S. geoscience survey; Ross Sea, Antarctica:
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New Zealand Antarctic Record, v. 5, no. 3, p. 41-43.
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Cooper, Allen K., 1984, Geophysical and geologic studies of Ross Sea continental margin,
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Antarctica, in 1984 American Association of Petroleum Geologists annual convention with
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divisions, Society For Sedimentary Geology/EMD/DPA: American Association of Petroleum
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Geologists Bulletin, v. 68, no. 4, p. 465.
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Cooper, A.K., and Davey, F.J., 1985, Marine geological and geophysical investigations in
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the Ross Sea, Antarctica: Antarctic Journal of the United States, v. 19, no. 5, p. 80-82.
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Cooper, Alan K., and Davey, F.J., 1985, Episodic rifting of Phanerozoic rocks in the
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Victoria Land Basin, western Ross Sea, Antarctica: Science, v. 229, no. 4718, p. 1085-1087.
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Cooper, Alan K., Mann, D.M., Childs, Jonathan R., and Davey, F.J., 1986, Marine geophysical
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data from the western Ross Sea, Antarctica: U.S. Geological Survey Open-File Report 86-0634, 14 p.
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Dadisman, S.V., Ryan, H.F., and Mann, D.M., 1987, Recording and processing procedures for
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multichannel seismic-reflection data collected in the western Ross Sea, Antarctica, in Cooper, Alan
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K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the
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western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series,
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v. 5B, p. 17-26.
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Hansen, R.O., and Childs, J.R., 1987, The Antarctic continental margin magnetic gradiometer data;
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suppression of time variations, in Cooper, Alan
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K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the
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western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series,
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v. 5B, p. 139-153.
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Behrendt, J.C., Cooper, Alan K., and Yuan, A., 1987, Interpretation of marine magnetic gradiometer
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and multichannel seismic-reflection observations over the western Ross Sea shelf, Antarctica, in
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Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and
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geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources,
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Earth Science Series, v. 5B, p. 155-177.
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Barron, J.A., and Burckle, L.H., 1987, Diatoms from the 1984 USGS Antarctic cruise in the Ross
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Sea, in Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology
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and geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources,
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Earth Science Series, v. 5B, p. 225-230.
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Wong, F.L., Barrett, P.J., Gamble, J., and Howell, D.G., 1987, Petrography of rock samples
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dredged from Iselin Bank, Ross Sea, Antarctica, in Cooper, Alan
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K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the
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western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series,
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v. 5B, p. 231-253.
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Wold, Richard J., and Cooper, Alan K., 1989, Marine magnetic gradiometer; a tool for the
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seismic interpreter: Geophysics: The Leading Edge of Exploration, v. 8, no. 8, p. 22-27.
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Bartek, Louis R., and Anderson, John B., 1990, Neogene stratigraphy of the Ross Sea continental
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shelf; revelations from Leg 2 of the 1990 Ross Sea expedition of the R/V Polar Duke, in
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Cooper, Alan K., and Webb, Peter N., eds., International workshop on Antarctic offshore acoustic
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stratigraphy (Antostrat); overview and extended abstracts: U.S. Geological Survey Open-File Report
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90-0309, p. 53-62.
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Childs, Jonathan R., and Cochrane, Guy R., 1990, Sonobuoy seismic data over the Ross Sea and Wilkes
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Land continental margins, in Cooper, Alan K., and Webb, Peter N., eds., International workshop on
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Antarctic offshore acoustic stratigraphy (Antostrat); overview and extended abstracts: U.S.
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Geological Survey Open-File Report 90-0309, p. 97-101.
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Cochrane, Guy R., Cooper, Alan K., Childs, Jonathan R., and Hart, Patrick E., 1992,
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USGS seismic refraction surveys in the Ross Sea, 1984-1990: U.S. Geological Survey
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Open-File Report 92-0556, 17 p.
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http://www.ngdc.noaa.gov/mgg/fliers/87-MGG-09
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Got Help?
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For L-2-84-AN, we would appreciate any information on -- contract, days at sea, dive count, funding, kms of navigation, national plan, notes, owner, ports, project, project number, purpose, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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