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Metadata
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ID
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W-1-06-MB
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Also Known As
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MBARI T971 to T979
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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, MBARI. Dive and Sampling data (ROV) of field
activity W-1-06-MB in Submarine canyons of the central
California coast from 04/27/2006 to 05/01/2006
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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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Chief Scientist
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Charlie Paull
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Activity Type
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Dive and Sampling
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Platform
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Western Flyer
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Area of Operation
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Submarine canyons of the central California coast
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Location map
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Bounding Coordinates
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37.52786
-123.21685 -121.74786
36.09080
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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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04/27/2006 (JD 117) to 05/01/2006 (JD 121)
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Analog Materials
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list
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Scanned Materials
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W-1-06-mb_equipmentlog log (pdf)
W-1-06-mb_opslog 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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Bill Ussler
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Patrick Whaling
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Doug Conlin
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Chris Preston
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Bill Normark
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Mary McGann
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Chris Gutmacher
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Anne Bernhardt
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Angela Hessler
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Buck Reynolds
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Mark Talkovic
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Randy Pricket
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Brian Schaefer
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Buzz Scott
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Ian Young
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Darrell Palmer
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Patt Duffy
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Matt Tanner
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Tim Chiefy
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Derek Greenwood
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Lance Wardle
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Aaron Glass
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Dan Chamberlin
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Dan Benvenuti
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Equipment Used
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Purpose
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Six dive days were planned in the axes of
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central coast canyons north and south of Monterey Canyon and its primary
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tributaries. The primary targets are Ano Nuevo, Pioneer, Lucia, Partington,
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and Sur canyons. The primary MBARI objective of these dives was to determine
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the recent sediment transport activity in each of these canyons with specific
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attention to tracking DDT residues. In addition, the USGS project interests
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were to determine which of the canyons, if any, show evidence for recent
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transport of coarse sediment and to examine the stratigraphy of the canyon
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walls on selected dives. Dive sites were based on MBARI and NOAA multibeam.
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The intention was to collect vibracore and push core along transects across
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the center of the axial channel and locally up the adjacent canyon walls.
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Mechanical problems with the Western Flyer limited the cruise to five days.
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Information to be Derived
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Extensive sea-floor video coverage to identify benthic fauna, active methane gas vents,
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etc. Sediment samples will be used for isotopic age determinations,
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stable-element isotopic studies, benthic-foraminifera populations, and
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sediment stratigraphy (for canyon/fan channel dive sites).
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Summary
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1730/JD117 R/V Western Flyer departs Moss Landing.
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~1830/JD117 Begin test of CTD/rosette sampler in upper Monterey Canyon (MBARI operation)
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2200/JD117 On station for the first ROV dive of the expedition TIBURON Dive
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T-971 in Ano Nuevo Canyon, one of the main tributaries to the Ascension
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Canyon
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0153/JD121 Complete final ROV Dive T979, in Partington Canyon.
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1430/JD121 A shaft seal leak on one of the main screws could not be fixed at
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sea. The ROV operations are suspended and the Western Flyer heads for Moss
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Landing to initiate repairs. This is the end of the science operations.
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The Western Flyer arrives in Moss Landing at 2245/JD121.
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Refer to the Operation Log for details.
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A total of 9 TIBURON ROV dives were completed by the end of the fourth day of
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operations on JD121. Of these dives, 1 was in Ano Nuevo Canyon, 4 were Pioneer
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Canyon, 1 was in a slope gulley north of Pioneer Canyon, 1 was in Sur Canyon,
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and 2 were in Partington Canyon. During these dives, 18 vibracores were
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obtained that will come to the USGS for MST logging, photography, description
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and archiving. Other cores that will come to the USGS are 4 vertical push
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cores for stratigraphic purposes that will be logged before splitting for
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photography and description.
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Push cores not saved in their original polycarbonate core liners include 12
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horizontal push cores, which were taken from vertical or near-vertical
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outcrops and 6 samples from vertical push cores whose upper sections were
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sampled for geochemical analyses. The bottom sections of these cores were
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split after extruding, photographed on board the vessel, and are stored in
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plastic ziplock bags.
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All primary objectives of the cruise were attained by dives in the canyons
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noted above, but the failure to sample Lucia Canyon and the Sur Canyon
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downstream of its confluence with Partington Canyon leaves an incomplete
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picture of the sediment transport history in these conduits.
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Notes
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(1) Station IDs reflect the Tiburon dive numbers set by MBARI.
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(2) Sample numbers for the push cores are generally not consecutive but
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reflect permanent labels on coring and other devices that are randomly chosen
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before each dive, and many of the push cores are reused in later dives.
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USGS sample protocol could not used during dives except for the Activity ID
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(W-1-05-SC).
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(3) Sample numbers recorded in FACS reflect only those samples that will be
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brought to the USGS for logging, description, and, in most cases, archiving.
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(4) Water samples collected by CTD/rosette sampler are not entered in FACS log
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because samples are processed on board for an MBARI program.
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ROV Tiburon and CTD/rosette sampler (all MBARI equipment). Tiburon will be used
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to map and sample the sea floor (see Purpose and Goals above). The CTD/rosette
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sampler is for detection of methane gas in the water column within the canyons
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generally at the ROV dive sites.
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Got Help?
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For W-1-06-MB, we would appreciate any information on -- contract, days at sea, dive count, funding, kms of navigation, national plan, NGDC Info, owner, project, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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