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Metadata
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ID
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T-1-96-NC
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Also Known As
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TN062
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Abstract
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Chief Scientist: Homa Lee. Mooring Redeployment and
Sampling data (boxcore, pistoncore, CTDmeter, multibeam) of
field activity T-1-96-NC in Eel River Margin, Northern
California from 07/13/1996 to 07/18/1996
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Project/Theme
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Strata Formations on Margins (Strataform)
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Chief Scientist
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Homa Lee
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Activity Type
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Mooring Redeployment and Sampling
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Platform
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Thomas G. Thompson
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Area of Operation
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Eel River Margin, Northern California
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Location map
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Bounding Coordinates
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41.75000
-125.75000 -122.25000
37.75000
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Dates
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07/13/1996 (JD 195) to 07/18/1996 (JD 200)
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Analog Materials
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list
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Index map
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Information Specialist
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Ken Israel, Multi-sensor Whole Core Logger And Box Core Subsampler
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Crew
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Homa Lee
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Chief Scientist, USGS Western Region
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Equipment Used
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boxcore
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pistoncore
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CTDmeter
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multibeam
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Purpose
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STRATA FORmation on Margins (STRATAFORM)
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was initiated in 1994 by the Office of Naval Research as a coordinated
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multi-investigator study of continental-margin sediment transport
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processes and stratigraphy. The program is investigating the stratigraphic
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signature of the shelf and slope portions of continental margins, and
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hopes to provide better understanding of the sedimentary record and
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better prediction of strata.
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Information to be Derived
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cores were analyzed using a multi-sensor core logger, yielding P-wave velocity, wet bulk density, and magnetic susceptibility data. Atlas Hydrosweep
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multibeam echosounder bathymetric data, gridded at 2.16" (~60m) resolution.
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This system is designed for surveys in continental shelf areas down to depths
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of 4000 m with a swath width of up to 6 times the water depth, with an operating
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frequency of kHz. It provides 160 beams.
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Summary
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20 box cores, 12 piston cores, and 3 Kasten cores, along with 4 CTD
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casts.
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Notes
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From Western Region Marine and Coastal Surveys Bulletin, July 12,
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1996...
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CORING ON THE HUMBOLDT SLUMP
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Ken Israel and Homa Lee are aboard the new (and big!!!) R/V Thomas Thompson
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on our way from San Diego to the STRATAFORM area on the Eel River Margin and
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then on to Eureka. Our plans are to take box and piston cores on the slope in an
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area that has been described as a giant submarine slump (Humboldt Slump). Last
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summer a beautiful swath-bathymetry map of the area was produced, and ever since
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we have been trying to explain all the features we observe on the map. We hope
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the coring will help.
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There are more ex-USGS employees on the cruise than present ones. Mark Holmes
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and Byron Ruple are aboard, and the ship's master is Captain Al.
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The weather is good and the whales are out. -- Homa Lee and Ken Israel
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From Western Region Marine and Coastal Surveys Bulletin, July 26, 1996...
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RECEIVED JULY 17 FROM THE THOMPSON
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We have just finished 4 days of intense box and piston coring in the
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STRATAFORM area off Eureka. We obtained 12 piston cores, each of which is about
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7 m long. We also obtained 21 box cores, one at each of the piston stations plus
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a few more. We are finding some turbidites and lots of gas in some of the piston
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cores.
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Mark Holmes has been a tremendous help to us. Food is good and the Thompson
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rides great.
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We are doing a one-day Hydrosweep survey of the deeper areas west of the
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STRATAFORM area today, and we go to Eureka to unload tomorrow.
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Cheers, Homa Lee and Ken Israel
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Publications
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Minasian, Diane L., Lee, Homa J., Locat, Jaques, Orzech, Kevin M., Martz,
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Gregory R., and Israel, Kenneth, 2001, The STRATAFORM Project: U.S. Geological
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Survey Geotechnical Studies: U.S. Geological Survey Open-File Report 01-190:
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geopubs.wr.usgs.gov/open-file/of01-190/of01-190/
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Mayer, Larry, Fonseca, Luciano, Pacheco, Miguel, Galway, Sean, Vicente Martinez,
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Jose, Hou, Tianhang, Orange, Dan, Gulick, Sean, Yun, Janet, Gardner, James V.,
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Dartnell, Pete, Lee, Homa, and Cutter, Randy, 200?, The STRATAFORM GIS:
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University of New Brunswick, Office of Naval Research.
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Got Help?
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For T-1-96-NC, we would appreciate any information on -- contract, days at sea, dive count, funding, kms of navigation, national plan, NGDC Info, organization, owner, ports, project number, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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