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Metadata
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ID
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E-1-94-AN
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Also Known As
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94039
ACRUP
EXPLPRNA-94
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Abstract
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Osservatorio Geolisco Sperimentate, Italy. Chief Scientists:
Alan Cooper, G. Brancolini. Geophysical data
(bottomseismometer, 48channel) of field activity E-1-94-AN in
Ross Sea and adjacent Transantarctic Mountains, Antarctica
from 01/07/1994 to 03/03/1994
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Organization
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Osservatorio Geolisco Sperimentate, Italy
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Project/Theme
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Antarctic Crustal Profile Seismic Project (ACRUP)
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Chief Scientist
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Alan Cooper
G. Brancolini
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Activity Type
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Geophysical
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Platform
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Explora
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Area of Operation
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Ross Sea and adjacent Transantarctic Mountains, Antarctica
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Location map
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Bounding Coordinates
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-77.07168
-179.93667 -169.22550
-77.12175
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Dates
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01/07/1994 (JD 007) to 03/03/1994 (JD 062)
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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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Alan Cooper
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Chief Scientist, USGS Western Region
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G. Brancolini
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Chief Scientist, Osservatorio Geolisco Sperimentate, Italy
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M. Bahnhoff
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Unspecified, Inst. Geophys., University of Hamburg, Germany
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G. Pellis
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Unspecified, University of Trieste, Italy
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Greg Miller
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Unspecified, USGS Woods Hole
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Equipment Used
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bottomseismometer
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48channel
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Purpose
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The objective of the ACRUP project is to study the structure of the
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crust and upper mantle of the Ross Sea region using geophysical measurements
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along onshore and offshore transects. The Ross Sea is part of the West Antarctic
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Rift system (WRS). The WRS has a 2500 to 5000-m-high rift shoulder
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(Transantarctic Mountains (TAM)) on the west, and is underlain in the Ross Sea
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by numerous large rift basins now filled with thick sedimentary sections. A deep
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sedimentary basin, the Victoria Land basin, and an active rift (Terror rift) are
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mapped along the western side of the Ross Sea adjacent to the TAM. The rift
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structures of the Ross Sea are believed to have formed initially with the
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Mesozoic breakup of Gondwana, and later with late Mesozoic and Cenozoic
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extension across the Ross Sea and uplift of the Transantarctic Mountains. The
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age of the Mesozoic and Cenozoic rifting is poorly known because rocks from deep
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within the rift basins have not been sampled . Also, the crustal structure and
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mechanism(s) of rifting are not known because few refraction data exist,
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although many models for the evolution of the WRS and uplift of the TAM have
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been proposed. The ACRUP experiments are designed to determine deepcrustal
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structures in the Ross Sea region to help resolve the mechanisms, and relative
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timings, of rifting events.
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Notes
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See online cruise report at http://obs.er.usgs.gov/acrup94.html#data
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Publications
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Cruise Report exists at Woods Hole
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Got Help?
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For E-1-94-AN, we would appreciate any information on -- information to be derived, equipment used, information specialist, ports, publications, purpose, summary.
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