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Metadata
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ID
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P-2-07-MB
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Also Known As
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MBARI V3029 to 3047
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Abstract
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Monterey Bay Aquarium Research Institute,United States
Geological Survey, Menlo Park, California. Chief Scientist:
Charlie Paull. Vibra-core sampling with the ROV Ventana data
(vibracore) of field activity P-2-07-MB in upper Monterey
Canyon from 06/26/2007 to 06/28/2007
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Organization
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Monterey Bay Aquarium Research Institute
United States Geological Survey, Menlo Park, California
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Project/Theme
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Urban Ocean
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Chief Scientist
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Charlie Paull
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Activity Type
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vibra-core sampling with the ROV Ventana
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Platform
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Point Lobos
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Area of Operation
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upper Monterey Canyon
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Location map
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Bounding Coordinates
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36.79334
-121.88607 -121.84338
36.79290
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Ports
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leave Moss Landing, CA
arrive Moss Landing, CA
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Dates
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06/26/2007 (JD 177) to 06/28/2007 (JD 179)
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Analog Materials
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list
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Scanned Materials
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P-2-07-mb.ops log (pdf)
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Index map
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Information Specialist
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Crew
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Charlie Paull
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Chief Scientist, MBARI
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Rendy Keaten
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Scientist, MBARI
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Bill Ussler
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Scientist, MBARI
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Jane Curtner
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Scientist (only 6/28/07), MBARI
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Michele Morselli
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Visiting scientist, Universita di Ferrara, Italy
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Julie
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MBARI summer intern (only 6/26/07), MBARI
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Katherine Maier
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Scientist (only 6/26/07), Stanford
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Jake Covault
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Scientist (only 6/27/07 and 6/28/07), Stanford
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Mark Talkovic
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ROV Ventana pilot, MBARI
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Knute Brekke
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ROV Ventana pilot (only 6/26/07 and 6/28/07), MBARI
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D. J. Osborne
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ROV Ventana pilot (only 6/26/07 and 6/27/07), MBARI
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Ian Young
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Point Lobos crew (Captain), MBARI
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Greg Maudlin
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Point Lobos crew, MBARI
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Mark Aiello
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Point Lobos crew , MBARI
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Erik Thunstrom
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Point Lobos crew , MBARI
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James Boedecker
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Point Lobos crew , MBARI
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Frank Flores
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Point Lobos crew (only 6/26/07 and 6/27/07), MBARI
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Perry Shoemake
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Point Lobos crew (only 6/28/07), MBARI
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Equipment Used
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Purpose
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Three days of vibracoring with the ROV Ventana's newly outfitted 14'
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aluminum cores were planned in the upper Monterey Canyon. The primary goal was
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to acquire an approximately 130-meter long transect of cores across the
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sediment waves in the Monterey Canyon floor at water depths of approximately
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285 meters. Processing and analysis of these cores will be used to study the
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origin of the sediment waves. High resolution AUV mapping of the canyon floor
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and sediment waves was acquired during a previous MBARI cruise on June 18, 2007.
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Information to be Derived
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Vibracores up to 14 feet in length with aluminum liners were obtained
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with the ROV Ventana. The cores were logged on a GeoTek whole-core-logger at
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USGS on the day following their collection so that results could be used to
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redirect the ongoing core collection. The cores will be used to study the
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origin of the sediment waves.
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Summary
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1400/JD177 R/V Point Lobos departs Moss Landing
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1610/JD177 ROV Ventana dives for first core
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2200/JD177 ROV Ventana dives for last core
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1630/JD177 R/V Point Lobos arrives in Moss Landing
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1400/JD178 R/V Point Lobos departs Moss Landing
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1515/JD178 ROV Ventana dives for first core
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2140/JD178 ROV Ventana dives for last core
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2245/JD178 R/V Point Lobos arrives in Moss Landing
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1400/JD179 R/V Point Lobos departs Moss Landing
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1510/JD179 ROV Ventana dives for first core
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2155/JD179 ROV Ventana dives for last core
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2300/JD179 R/V Point Lobos arrives in Moss Landing
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This cruise was the first use of a 14' aluminum core tube with the ROV
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Ventana's vibracoring system. A Homer Beacon was used to position the cores.
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The core sites within 60 meters of the beacon were selected by diving to the
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beacon, then moving off on a course of 290o or 110o to a pre-selected
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distance. Core sites further away were approached using ROV navigation to
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locate the general area (~10m) and using the beacon to record the range.
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Eighteen cores were collected along the transect. The last core was taken
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where the bottom was suspected to be softer sediment to test the full
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penetration of the 14' core tube. Cores recovered on the first day
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recovered a much shorter amount of sediment in the cores than was expected.
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Before each core was removed from the ROV Ventana, water was drained from the
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portion of the core tubing not filled with sediment by using a hacksaw to
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create a small hole in the core tube above the sediment. Cores were then
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capped, labeled, and split into sections (if core was over 1.5m). Alterations
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were made on the second and third days of coring to increase the penetration
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of and recovery in the core tube.
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Notes
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MBARI's remotely operated vehicle (ROV) Ventana was used to obtain
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vibracores. The ROV Ventana had a 14' aluminum core tube attached to the
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vibracoring system in addition to the underwater cameras it typically carries.
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The ROV Ventana is connected to the R/V Point Lobos by a surface slack cable
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through which it communicates with pilots in the onboard control room. The
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cores were positioned relative to a Homer Beacon that was placed at (36.7931N,
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121.8438 W) during the first dive and removed at the end of the third day of coring.
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Got Help?
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For P-2-07-MB, we would appreciate any information on -- crew, information to be derived, equipment used, information specialist, publications, purpose, summary.
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