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ID
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78015
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Also Known As
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78015
CAGR
C-1-78-NA
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Abstract
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United States Geological Survey, Woods Hole, Massachusetts.
Chief Scientists: John Grow, Bill Dillon, John Schlee.
Geophysical data (airgun, 48channel) of field activity 78015
(C-1-78-NA) in Northern Atlantic, Middle Atlantic, Southern
Atlantic from 05/29/1978 to 11/06/1978
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Organization |
United States Geological Survey, Woods Hole, Massachusetts
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Project/Theme
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RRiver
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Chief Scientist
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John Grow
Bill Dillon
John Schlee
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Activity Type
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Geophysical
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Platform
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Carino
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Area of Operation
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Northern Atlantic, Middle Atlantic, Southern Atlantic, North Atlantic Ocean
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Bounding Coordinates
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42.30671
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-77.65324 -65.78622 |
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32.34685 |
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Dates
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05/29/1978 (JD 149) to 11/06/1978 (JD 310)
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Analog Materials
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No analog holdings.
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Crew
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John Grow
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Chief Scientist, USGS Woods Hole
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Bill Dillon
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Chief Scientist, USGS Woods Hole
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John Schlee
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Chief Scientist, GSI
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Equipment Used
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Purpose
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To survey the geological framework of the United States coastal areas.
CDP-lines 18-38.
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Information to be Derived
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Seismic reflection profiles
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Summary
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CDP seismic reflection data for lines 18 through 38
from Atlantic coastal areas were collected as part of a program
by the U.S. Geological Survey (USGS) to survey the geological
framework of the United States coastal areas.
During 1978, USGS contracted with Geophysical Services, Inc.
(GSI), for GSI to collect 4,813 km of 48-channel seismic
reflection profiles along the continental margin between North
Carolina and Maine. Fifteen lines were acquired perpendicular to
the margin (lines 18 through 32) and six lines were acquired
parallel to the margin (lines 33 through 38). The data were
collected on the vessels CARINO and CECIL GREEN between May
and November 1978. Tuned airgun arrays totaling 2,000 and 1,400
cu. in. of air were used by the respective vessels. A 3,600-m-
long hydrophone streamer was used by both ships.
The profiles were stacked by GSI and displayed in conventional
time-variant scaled format to 12 sec of recording time with
vertical scales of 2.5 in/sec and horizontal scales of 1.2 km/in.
Additional processing was applied to Line 25 across the Baltimore
Canyon Trough and Line 32 across Carolina Trough. Data collected
along line 25 over the Outer Shelf, Slope, and Upper Rise were
restacked with 1 1/2-km spaced velocity analyses, signature
deconvolution, deep-water multiple deconvolution, velocity
filtering (on shelf only), and time migration. The restacked
part and remaining parts of Line 25 were converted to depth
sections having a vertical scale of 1.2 km/in (vertical
exaggeration: 2/1). Data collected along two parts of line 32
were also restacked with signature and deep-water multiple
deconvolution. Line 32 was also converted to a depth section
except for the first 80 km near shore.
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Notes
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CARINO used with CECIL GREEN.
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Publications
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Got Help?
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For 78015, we would appreciate any information on -- analog materials, contract, days at sea, dive count, funding, information specialist, kms of navigation, national plan, NGDC Info, owner, ports, project number, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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