| Identifier | I790AT | ||||||||
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| Alternate names | I-7-90-AT,AMASSEDS | ||||||||
| Purpose | To study the movement of sediment particles in the water column, the accumulation of sediment particles on the seabed, and the effects that sediment particles have on geochemical processes in the water column and seabed. | ||||||||
| Description | 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 | ||||||||
| Location | Atlantic Ocean | ||||||||
| Summary | Measurements and samples were collected at 42 different stations on the continental shelf. Of these 42 stations, 35 were examined in detail by multiple coring. As many as 8 cores were taken at sites where smaples were required for geochemistry, biology and stratigraphy. Cores taken primarily for stratigraphic analysis were box cores (23), kasten cores (53), and one piston core (1). In addition, 11 stations were sampled with Shipek grab sampler. Cores were radiographed to document sedimentary structures and the majority were subsampled for laboratory analysis involving radiochemistry, bulk density, mineralogy and texture. Box core or grab samples were analyzed from a majority of stations by scientists from UFRJ as a survey of infaunal assemblages present on the Amazon shelf. In addition to sea bottom campling, 3.5 kHz profiles were obtained along the transit lines connecting each station and approximately 100 km of GEOPULSE high-resolution reflection seismic profiles were collected. During this leg two coastal sampling trips were made to the Cabo Cassipore and Ponta do Costa areas with small boats by scientists from UFPA, UFF and the USA. The control of redox reactions by iron oxides in the seabed was examined at 6 stations by sampling sediment-water solute fluxes and interstitial water chemistry and by monitoring reaction rate experiments, authigenic mineral formation, and benthic community activity (stations 3204, 3205, 3211, 3216, 3221, and 3226). Two stations (3201 and 3209) were sampled in the southern portion of the study area for measurement of sediment-water fluxes and benthic-community characteristics. Grab samples were taken in sands at the seaward-most station, 3229. Water column samples and CTD profiles were obtained at all the seabed geochemistry/benthic biology stations (3201, 3204, 3205, 3209, 3211, 3216, 3221, and 3226). Surface plankton tows and bottom water samples were taken at stations 3201, 3204, 3211, 3209, 3216, and 3221. | ||||||||
| Info derived | Stratigraphic analysis, sedimentary structures, radiochemistry, bulk density, mineralogy and texture, infaunal assemblages present on the Amazon shelf, bottom profiles, high-resolution reflection seismic profiles, control of redox reactions by iron oxides in the seabed. | ||||||||
| Comments | Staff information imported from InfoBank Chuck Nittrouer (MSRC, SUNY) - Chief Scientist Robert Aller (MSRC, SUNY) - Scientist Jim Mackin (MSRC, SUNY) - Scientist Steve Kuehl (USC) - Scientist Neil Blair (NCSU) - Scientist Mead Allison (MSRC, SUNY) - Graduate Student William Wallace (MSRC, SUNY) - Graduate Student Mark Green (MSRC, SUNY) - Graduate Student Tom Pacioni (USC, SC) - Graduate Student Heidi Vigil (MSRC, SUNY) - Graduate Student Mardi Montague (MSRC, SUNY) - Student Alberto Figueiredo (chief Scientist, UFF) - Co Heloisa Varges (UFF) - Graduate Student Carlos Beisl (UFF) - Student Julio Faleiro (UFF) - Student Soraya Patchneelam (UFF) - Graduate Student Ricardo Silva (UFF) - Graduate Student Hsambasiva Patchneelam (UFF) - Scientist Debora Peixoto (UFF) - Graduate Student Ercilio Faria (Scientist, UFPA) - Jr. Mauro Ferreira (UFPA) - Student Almicar Mendes (UFPA) - Student Ismar Carvalho (UFRJ) - Student Renato Cruz (UFRJ) - Scientist Paulino Souza (UFRJ) - Student Marcio Brum (UFF) - Student Dennis Guffey (TAMU, Tx) - Technician Nelson Carnerro (DHN) - Naval Observer | ||||||||
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| Activity | Geological and Geophysical |
| Organization |
University of South Carolina
, SC
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| Organization | Universidade Federal Fluminense |
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State University of New York
, NY
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North Carolina State University
Raliegh, NC
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| Organization | Federal University of Rio De Janeiro |
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| Organization | Universidade Federal Do Para |
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| Affiliate principal | Chuck Nittrouer (MSRC, SUNY), Alberto Figueiredo | ||
| Affiliate staff | Robert Aller (MSRC, SUNY) - Scientist,Jim Mackin (MSRC, SUNY) - Scientist,Steve Kuehl (USC) - Scientist,Neil Blair (NCSU) - Scientist,William Wallace (MSRC, SUNY) - Graduate Student,Mark Green (MSRC, SUNY) - Graduate Student,Tom Pacioni (USC, SC) - Graduate Student,Heidi Vigil (MSRC, SUNY) - Graduate Student,Mardi Montague (MSRC, SUNY) - Student,Alberto Figueiredo (chief Scientist, UFF) - Co,Heloisa Varges (UFF) - Graduate Student,Carlos Beisl (UFF) - Student,Julio Faleiro (UFF) - Student,Soraya Patchneelam (UFF) - Graduate Student,Ricardo Silva (UFF) - Graduate Student,Hsambasiva Patchneelam (UFF) - Scientist,Debora Peixoto (UFF) - Graduate Student,Ercilio Faria (Scientist, UFPA) - Jr.,Mauro Ferreira (UFPA) - Student,Almicar Mendes (UFPA) - Student,Ismar Carvalho (UFRJ) - Student,Renato Cruz (UFRJ) - Scientist,Paulino Souza (UFRJ) - Student,Marcio Brum (UFF) - Student,Dennis Guffey (TAMU, Tx) - Technician,Nelson Carnerro (DHN) - Naval Observer |
| Data category: | Sampling, Environmental Data, Seismics |
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| Data type: | Biology, Geology, CTD, Sub Bottom Profiler, Conductivity, Dissolved Oxygen, Fluorescence, Nitrate, Temperature, pH |
| Equipment | Usage description | Data types | Datasets |
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| boxcore | Biology, Geology | (no data reported) | |
| Kastencore | Geology | (no data reported) | |
| pistoncore | Geology | (no data reported) | |
| Shipekgrab | Geology | (no data reported) | |
| CTD | Surveys (geochemical), Experiments (geochemical), CTD | (no data reported) | |
| 3.5khz | Sub Bottom Profiler | (no data reported) | |
| seismic | Sub Bottom Profiler | (no data reported) | |
| planktonnet | Biology | (no data reported) | |
| watersamples | Conductivity, CTD, Dissolved Oxygen, Fluorescence, Nitrate, pH, Temperature, Turbidity, Wave | (no data reported) |
