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USGS CMG L-2-84-AN Metadata

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ID L-2-84-AN
Abstract 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
Organization United States Geological Survey, Menlo Park, California
Chief Scientist Alan Cooper
Fred Davey
Activity Type Geological and Geophysical
Platform Samuel Phillips Lee
Area of Operation Antarctica, Southern Ocean
Bounding Coordinates
-43.59192
163.00166    -173.37114
-77.64513
Dates 02/03/1984 (JD 034) to 03/03/1984 (JD 063)
Analog Materials list
Information Specialist
Shawn Dadisman
Crew
Aaron Dunwald Chief Engineer
Al McClenaghan Ship Captain
Alan Cooper Chief Scientist
Andy Stevenson Geologist
Brian Edwards Geologist
Dave Howell Geologist
Dennis Mann Chief Watchstander
Donna Blackman Watchstander
Erk Reimnitz Geologist
Fred Davey Chief Scientist
Herman Karl Geologist
Holly Ryan Watchstander
Jim Vaughan Chief Engineer
Joe Edwards Mechanical Technician
John Behrendt Geophysicist
John Rapp Geochemist
Kaye Kinoshita Navigator
Kevin O'Toole Mechanical Technician
Pat Moore Chief Mate
Roy Fields Electronics Technician
Shawn Dadisman Dafe Curator
Skip Pelletier Watchstander
Equipment Used
3dot5khz
12khz
gradiometer
uniboom
airgunmonitor
airgun
sonobuoy
gravitycore
chaindredge
dartcore
magnetics
Digitrack
heatflow
integratednavigation
transitsatellite
24channel
Information to be Derived
Seismic reflection profiles, gravity, magnetics, lithology,
and bathymetry.
Summary
Approximately 2,350-line km of multichannel
seismic-reflection data, as well as 4,500 km of other geophysical
profile data including gravity, magnetic gradiometer, and
echo-sounding profiles for the western Ross Sea, Antarctica
were collected.

The seismic source consisted of a tuned five-airgun array totaling 1,311 cu.in. pressurized to 1,900 psi, towed at a depth of 10.5 m.
The receiver consisted of a 24-channel hydrophone streamer, with 100-m group lengths containing 60 hydrophones in each group.
The streamer was towed at a depth of 12.5 m.
The data were recorded with a GUS Model HDDR-4200 recording system.
All lines were recorded to 12 sec, with exception of Line 407 (15 sec) and Line 419 (8 sec).

Magnetic data were recorded continuously with a Geometrics proton-procession gradiometer to remove the large temporal magnetic variations commonly recorded at polar latitudes.
The gradiometer system consisted of two proton-precession magnetometers separated horizontally by 500 ft (152 m) with the forward sensor lying 225 m aft of the ship.
Both sensors were towed at a depth of approximately 20-40m. Data were sampled at 4-sec intervals.

Gravity data were recorded continuously with a LaCoste and Romberg sea gravimeter (S53) on a two-axis stabilized platform.
The data were collected at 20-sec intervals and subsequently desampled to 2 min or greater for plotting and modeling.

NGDC Overview
! Converted to time format with year at start.
!
DATA COLLECTION OVERVIEW  (use NGDC GEODAS CD to retrieve data)

MCG Data Collection ID ---         L284AN
Institution Data Collection ID --- L284AN
NGDC ID ---                        06050069
Funding ---                        (unspecified)
Project, Cruise & Leg ---          ANTARCTICA - ROSS SEA
Study region ---                   -43.00000,-78.00000,+163.00000,-173.00000
Chief Scientist(s) ---             ALAN COOPER,FRED DAVEY
Date field data collection started --- 02/03/84     LV MCMURDO
Date field data collection ended ---   03/03/84     ARRIVE LYTTLETON, N.Z.
Parameters surveyed ---
   Bathymetry:                     surveyed, contained in data file
   Magnetics:                      surveyed, contained in data file
   Gravity:                        surveyed, contained in data file
   High-resolution seismics:       (unspecified)
   Deep penetration seismics:      (unspecified)
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)
Date of data input to NGDC ---     08/05/87
Contributing institution ---       USGS Branch of Pacific Marine Geology
Country ---                        United States

Navigation instrumentation ---     NAV SATELLITE / INTEGRATED NAV
Position determination method ---  (unspecified)

Bathymetry instrumentation ---            12KHZ
Additional forms of bathymetric data ---  ANALOG
General rate of bathymetry in file ---    0.9 minutes
General collection rate of bathymetry --- (unspecified)
Assumed sound velocity ---                (unspecified)
Bathymetric datum code ---                No correction applied (sea level)
Bathmetry interpolation scheme ---        (unspecified)

Magnetics instrumentation ---            (unspecified)
Additional forms of magnetics data ---   (unspecified)
General rate of magnetics in file ---    0.9 minutes
General collection rate of magnetics --- (unspecified)
Magnetic sensor tow distance ---         (unspecified)
Magnetic sensor depth ---                (unspecified)
Two sensor horizontal separation ---     (unspecified)
Residual magnetics reference field ---   (unspecified)
Method of applying residual field ---    (unspecified)

Gravity instrumentation ---            SHIPBOARD GRAVITY METER
Additional forms of gravity data ---   ANALOG RECORDS
General rate of gravity in file ---    0.7 minutes
General collection rate of gravity --- (unspecified)
Theoretical gravity formula ---        (unspecified)
Reference system ---                   (unspecified)
Corrections applied ---                (unspecified)
Starting land tie ---                  (unspecified)
Ending land tie   ---                  (unspecified)

Seismic instrumentation --- 3.5KHZ,24 CHAN,SNGL CHAN AIRGUN,UNIBOOM
Formats of seismic data --- ANALOG

Notes ---
SONOBOUY
Publications
Davey, F.J., and Cooper, A.K., 1984, U.S.G.S. geoscience survey; Ross Sea, 
Antarctica:
New Zealand Antarctic Record, v. 5, no. 3, p. 41-43. 

Cooper, Allen K., 1984, Geophysical and geologic studies of Ross Sea continental margin, Antarctica, in 1984 American Association of Petroleum Geologists annual convention with divisions, Society For Sedimentary Geology/EMD/DPA: American Association of Petroleum Geologists Bulletin, v. 68, no. 4, p. 465.

Cooper, A.K., and Davey, F.J., 1985, Marine geological and geophysical investigations in the Ross Sea, Antarctica: Antarctic Journal of the United States, v. 19, no. 5, p. 80-82.

Cooper, Alan K., and Davey, F.J., 1985, Episodic rifting of Phanerozoic rocks in the Victoria Land Basin, western Ross Sea, Antarctica: Science, v. 229, no. 4718, p. 1085-1087.

Cooper, Alan K., Mann, D.M., Childs, Jonathan R., and Davey, F.J., 1986, Marine geophysical data from the western Ross Sea, Antarctica: U.S. Geological Survey Open-File Report 86-0634, 14 p.

Dadisman, S.V., Ryan, H.F., and Mann, D.M., 1987, Recording and processing procedures for multichannel seismic-reflection data collected in the western Ross Sea, Antarctica, in Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 5B, p. 17-26.

Hansen, R.O., and Childs, J.R., 1987, The Antarctic continental margin magnetic gradiometer data; suppression of time variations, in Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 5B, p. 139-153.

Behrendt, J.C., Cooper, Alan K., and Yuan, A., 1987, Interpretation of marine magnetic gradiometer and multichannel seismic-reflection observations over the western Ross Sea shelf, Antarctica, in Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 5B, p. 155-177.

Barron, J.A., and Burckle, L.H., 1987, Diatoms from the 1984 USGS Antarctic cruise in the Ross Sea, in Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 5B, p. 225-230.

Wong, F.L., Barrett, P.J., Gamble, J., and Howell, D.G., 1987, Petrography of rock samples dredged from Iselin Bank, Ross Sea, Antarctica, in Cooper, Alan K., and Davey, Frederick J., eds., The Antarctic continental margin; geology and geophysics of the western Ross Sea: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 5B, p. 231-253.

Wold, Richard J., and Cooper, Alan K., 1989, Marine magnetic gradiometer; a tool for the seismic interpreter: Geophysics: The Leading Edge of Exploration, v. 8, no. 8, p. 22-27.

Bartek, Louis R., and Anderson, John B., 1990, Neogene stratigraphy of the Ross Sea continental shelf; revelations from Leg 2 of the 1990 Ross Sea expedition of the R/V Polar Duke, in Cooper, Alan K., and Webb, Peter N., eds., International workshop on Antarctic offshore acoustic stratigraphy (Antostrat); overview and extended abstracts: U.S. Geological Survey Open-File Report 90-0309, p. 53-62.

Childs, Jonathan R., and Cochrane, Guy R., 1990, Sonobuoy seismic data over the Ross Sea and Wilkes Land continental margins, in Cooper, Alan K., and Webb, Peter N., eds., International workshop on Antarctic offshore acoustic stratigraphy (Antostrat); overview and extended abstracts: U.S. Geological Survey Open-File Report 90-0309, p. 97-101.

Cochrane, Guy R., Cooper, Alan K., Childs, Jonathan R., and Hart, Patrick E., 1992, USGS seismic refraction surveys in the Ross Sea, 1984-1990: U.S. Geological Survey Open-File Report 92-0556, 17 p.

http://www.ngdc.noaa.gov/mgg/fliers/87mgg09.html
Got Help? 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.
Type Webpage KMZ Arc         Metadata        
Bathymetry data bath    
Gravity data grav    
Imagery data photos    
Magnetics data mag    
Metadata data     txt  data  FAQ  xml
Sensors data sensors    
Navigation data nav    
Samples data samp    
Seismic data seis    
Times   070.times    

L-2-84-AN location map of where navigation 

equipment operated
L-2-84-AN location map of where navigation 

equipment operated

 
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