Antarctic CRUstal Profile (ACRUP)

PI: Dr. Uri S. ten Brink 
(USGS, Woods Hole, MA 02543)

Field technician: Jie Zhang 
(USGS contractor; currently at MIT, Cambridge, MA 02142)

The Antarctic Crustal Profile (ACRUP) is a multidisciplinary research
project that was carried out in the Ross Sea area under the auspices 
of the Italian National Research Antarctic Program (PNRA), by a number 
of universities and research institutes in Italy, Germany and the U.S. 
during the austral summer of 1993/1994.  The project included offshore 
and onshore seismic experiments, integrated by geological and geophysical 
investigation along a traverse about 200 km long from the Victoria Land 
basin to the Polar Plateau across the Transantarctic Mountains (TAM).  
The United States Geological Survey deployed 12 portable broadband seismic 
stations (Reftek) during the land refraction and wide-angle reflection 
experiment with instrumentation available through the IRIS' PASSCAL 
program.  The onshore data were collected along a 150-km-long E-W profile 
by 58 seismometers at 3-km interval.  The energy sources for this experiment 
were four land explosions (530 kg dynamite, 80, 150 and 300 kg pentrite).

In this data set, we include records for the four shots collected by the
PASSCAL stations in SAC format.  Unfortunately, records from Italian
and German stations are not allowed to release.  For the entire seismic
array, the station spacing is about 3 km.  Shooting times of all four shots
have been corrected on the basis of the GPS control time and the first 
arrival traveltime to the near-shot station.  The overall waveform quality
is poor because of strong attenuation in the firn and ice.

A map in Postcript format (map_ACRUP.ps) shows the survey area.  The detailed
station coordinates are given in the plain text file (cood_ACRUP).  Another
Postcript file (sta_ACRUP.ps) shows the station locations and the ice thicknesses
beneath the stations, which were resolved from a radar survey.

The following list consists of the published abstracts or papers regarding
the ACRUP project.

Zhang, J., U. S. ten Brink, A. K. Cooper, B. Della Vedova, 1994, Seismic wave
propagation through the firn and ice near Starr Nunatak, Antarctica, EOS,
Transactions, American Geophysical Union, 75, No.20, 239.

Zhang, J., U. S. ten Brink, B. Della Vedova, 1995, Nonlinear refraction travelti
me tomography: imaging upper crustal structure of the Transantarctic Mountains,
EOS, Transactions, American Geophysical Union,76, No.46, 388

Della Vedova, B., J. Makris, U. S. ten Brink, and J. Zhang, 1995,
Crustal transect of the Transantarctic Mountains in the western Ross Sea
area, Antarctica, EOS, Transactions, American Geophysical Union, 76, No.46, 551.

Cooper, A. K., Cochrane, G., Zhang, J., Brancolini, G., Pellis, G., and F.
Egloff, 1995, The Antarctic crustal profile seismic project, Ross Sea, Antarctic
a, Antarctic Journal, 29(5), 15-18.

Della Vedova, B.,  G. Pellis, H. Trey, J. Zhang, A. K. Cooper, J. Makris,
ACRUP working group, 1996, Crustal structure of the Transantarctic Mountains,
Western Ross Sea, VII ISAES Proceedings.