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Metadata
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ID
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I-7-90-AT
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Also Known As
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AMASSEDS
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Abstract
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University of South Carolina,Universidade Federal
Fluminense,State University of New York,North Carolina State
University,Federal University of Rio De Janeiro,Federal
University of Para. Chief Scientists: Chuck Nittrouer,
Alberto Figueiredo. Geological and Geophysical data (boxcore,
Kastencore, pistoncore, Shipekgrab, CTDmeter, 3dot5khz,
seismic, planktonnet, watersamples) of field activity
I-7-90-AT in Amazon Shelf, Atlantic Ocean from 05/08/1990 to
05/20/1990
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Organization
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University of South Carolina
Universidade Federal Fluminense
State University of New York
North Carolina State University
Federal University of Rio De Janeiro
Federal University of Para
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Chief Scientist
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Chuck Nittrouer
Alberto Figueiredo
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Activity Type
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Geological and Geophysical
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Platform
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Columbus Iselin
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Area of Operation
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Amazon Shelf, Atlantic Ocean
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Location map
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Bounding Coordinates
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19.75000
-59.75000 -29.75000
-9.75000
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Dates
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05/08/1990 (JD 128) to 05/20/1990 (JD 140)
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Analog Materials
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list
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Index map
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Crew
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Chuck Nittrouer
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Chief Scientist, MSRC, SUNY
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Robert Aller
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Scientist, MSRC, SUNY
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Jim Mackin
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Scientist, MSRC, SUNY
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Steve Kuehl
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Scientist, USC
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Neil Blair
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Scientist, NCSU
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Mead Allison
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Graduate Student, MSRC, SUNY
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William Wallace
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Graduate Student, MSRC, SUNY
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Mark Green
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Graduate Student, MSRC, SUNY
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Tom Pacioni
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Graduate Student, USC, SC
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Heidi Vigil
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Graduate Student, MSRC, SUNY
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Mardi Montague
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Student, MSRC, SUNY
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Alberto Figueiredo
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Co-chief Scientist, UFF
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Heloisa Varges
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Graduate Student, UFF
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Carlos Beisl
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Student, UFF
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Julio Faleiro
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Student, UFF
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Soraya Patchneelam
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Graduate Student, UFF
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Ricardo Silva
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Graduate Student, UFF
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Hsambasiva Patchneelam
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Scientist, UFF
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Debora Peixoto
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Graduate Student, UFF
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Ercilio Faria
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Jr., Scientist, UFPA
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Mauro Ferreira
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Student, UFPA
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Almicar Mendes
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Student, UFPA
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Ismar Carvalho
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Student, UFRJ
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Renato Cruz
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Scientist, UFRJ
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Paulino Souza
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Student, UFRJ
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Marcio Brum
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Student, UFF
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Dennis Guffey
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Technician, TAMU, Tx
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Nelson Carnerro
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Naval Observer, DHN
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Equipment Used
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boxcore
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Kastencore
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pistoncore
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Shipekgrab
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CTDmeter
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3dot5khz
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seismic
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planktonnet
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watersamples
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Purpose
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To study the movement of sediment particles in the water column, the
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accumulation of sediment particles on the seabed, and the effects that sediment
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particles have on geochemical processes in the water column and seabed.
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Information to be Derived
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Stratigraphic analysis, sedimentary structures, radiochemistry, bulk
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density, mineralogy and texture, infaunal assemblages present on the Amazon
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shelf, bottom profiles, high-resolution reflection seismic profiles, control of
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redox reactions by iron oxides in the seabed.
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Summary
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Measurements and samples were collected at 42 different stations on the
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continental shelf. Of these 42 stations, 35 were examined in detail by multiple
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coring. As many as 8 cores were taken at sites where smaples were required for
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geochemistry, biology and stratigraphy. Cores taken primarily for stratigraphic
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analysis were box cores (23), kasten cores (53), and one piston core (1). In
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addition, 11 stations were sampled with Shipek grab sampler. Cores were
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radiographed to document sedimentary structures and the majority were subsampled
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for laboratory analysis involving radiochemistry, bulk density, mineralogy and
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texture. Box core or grab samples were analyzed from a majority of stations by
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scientists from UFRJ as a survey of infaunal assemblages present on the Amazon
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shelf. In addition to sea bottom campling, 3.5 kHz profiles were obtained along
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the transit lines connecting each station and approximately 100 km of GEOPULSE
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high-resolution reflection seismic profiles were collected. During this leg two
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coastal sampling trips were made to the Cabo Cassipore and Ponta do Costa areas
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with small boats by scientists from UFPA, UFF and the USA.
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The control of redox reactions by iron oxides in the seabed was examined at 6
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stations by sampling sediment-water solute fluxes and interstitial water
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chemistry and by monitoring reaction rate experiments, authigenic mineral
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formation, and benthic community activity (stations 3204, 3205, 3211, 3216,
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3221, and 3226). Two stations (3201 and 3209) were sampled in the southern
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portion of the study area for measurement of sediment-water fluxes and
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benthic-community characteristics. Grab samples were taken in sands at the
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seaward-most station, 3229. Water column samples and CTD profiles were obtained
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at all the seabed geochemistry/benthic biology stations (3201, 3204, 3205, 3209,
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3211, 3216, 3221, and 3226). Surface plankton tows and bottom water samples were
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taken at stations 3201, 3204, 3211, 3209, 3216, and 3221.
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Publications
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Rine, James M. and Nittrouer, Charles A. 1990. Report on field measurements and
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sampling during AmasSeds Cruise III - CI9004. Marine Sciences Research Center,
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State University of New York, NY. November 1990. 135 p.
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Got Help?
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For I-7-90-AT, we would appreciate any information on -- contract, days at sea, dive count, funding, information specialist, kms of navigation, national plan, NGDC Info, notes, owner, ports, project, project number, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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