USGS CMG L-9-81-AA Metadata

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DATA COLLECTION OVERVIEW  (use NGDC GEODAS CD to retrieve data)

MCG Data Collection ID ---         L981AA
Institution Data Collection ID --- L981AA
NGDC ID ---                        06050096
Funding ---                        (unspecified)
Project, Cruise & Leg ---          Tracy Vallier
Study region ---                   +55.00000,+50.00000,+173.00000,-165.00000
Chief Scientist(s) ---             Dave Scholl
Name of vessel ---                 Lee (surface ship)
Date field data collection started --- 07/19/81     LV DUTCH HARBOR, AK
Date field data collection ended ---   08/13/81     ARRIVE DUTCH HARBOR, AK
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 ---     06/17/87
Contributing institution ---       USGS Branch of Pacific Marine Geology
Country ---                        United States

Navigation instrumentation ---     (unspecified)
Position determination method ---  (unspecified)

Bathymetry instrumentation ---            (unspecified)
Additional forms of bathymetric data ---  (unspecified)
General rate of bathymetry in file ---    1.2 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 ---    1.1 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 ---            (unspecified)
Additional forms of gravity data ---   (unspecified)
General rate of gravity in file ---    1.0 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 --- (unspecified)
Formats of seismic data --- (unspecified)

Childs, Jonathan R., Scholl, David W., and Vallier, Tracy L., 1981, Onshore and 
offshore studies,
Amlia Island area, Aleutian Ridge, in Albert, N.R., and Hudson, Travis, eds., 
The United States
Geological Survey in Alaska; accomplishments during 1979: U.S. Geological Survey 
Circular 0823-B,
p. 134-137.


McCarthy, Jill, Stevenson, Andrew J., Scholl, David W., and Vallier, Tracy L., 
1984, Speculations on
the petroleum geology of the accretionary body; an example from the central 
Aleutians: Marine and
Petroleum Geology, v. 1, no. 2, p. 151-167. 


McCarthy, Jill, and Scholl, David W., 1985, Mechanisms of subduction accretion 
along the
central Aleutian Trench: Geological Society of America Bulletin, v. 96, no. 6, 
p. 691-701.


Harbert, W.P., Scholl, David W., Mann, D., Vallier, Tracy L., and Stevenson, 
Andrew J., 1982,
Geologic and tectonic history of Atka Basin, Aleutian Ridge, in American 
Geophysical Union
1982 fall meeting: American Geophysical Union Eos, Transactions, v. 63, no. 45, 
p. 1115.


McCarthy, J., Scholl, David W., Mann, D., Vallier, Tracy L., and Stevenson, Andrew J., 1982,
Mechanisms of accretion along the Aleutian Trench, in American Geophysical Union 
1982 fall
meeting: American Geophysical Union Eos, Transactions, v. 63, no. 45, p. 
1115.


Harbert, William, Scholl, David W., Vallier, Tracy L., Stevenson, Andrew J., and 
Mann, D.M., 1986,
Major evolutionary phases of a forearc basin of the Aleutian Terrace; relation 
to North Pacific
tectonic events and the formation of the Aleutian subduction complex: Boulder, 
CO, Geology,
v. 14, no. 9, p. 757-761.


McCarthy, Jill, Scholl, David W., and Sleep, Norman H., 1983, Accretionary structures along
the central Aleutian Trench: American Geophysical Union Eos, Transactions, v. 
64, no. 45, p. 870.


McCarthy, Jill, 1987, Seismic reflection imaging of plate boundaries; examples 
from the
central Aleutians, the North Atlantic, and the Basin and Range Province of the 
Western U.S.:
Stanford, CA, Stanford University Ph. D. Dissertation.


Geist, Eric L., Childs, Jonathan R., and Scholl, David W., 1987, Evolution and 
petroleum
geology of Amlia and Amukta intra-arc summit basins, Aleutian Ridge: Marine and 
Petroleum
Geology, v. 4, no. 4, p. 334-352.


Geist, Eric L., Childs, Jonathan R., and Scholl, David W., 1985, Extensional 
structures
on the Aleutian Ridge, Alaska: American Geophysical Union Eos, Transactions, v. 
66, no. 46,
p. 1072.


Geist, Eric L., Childs, Jonathan R., and Scholl, David W., 1988, The origin of 
summit
basins of the Aleutian Ridge; implications for block rotation of an arc massif: 
Tectonics,
v. 7, no. 2, p. 327-341.


Scholl, David W., Mann, Dennis M., Vallier, Tracy L., and Sliter, Ray W., 1988, 
Multichannel
seismic-reflection data collected in 1981 across the Aleutian Arc and Trench, 
Alaska:
U.S. Geological Survey Open-File Report 88-0592, 4 p. 2 sheets.