Summary Information for Field Activity 1985-019-FA

Area of Operations: Carolina Trough, United States, North America, North Atlantic

Dates: June 09, 1985 to June 30, 1985

Chief scientist: Anne Trehu

Al Ballard - NORDA

Objectives: Determine the velocity structure of the crust at the continent-ocean boundary beneath the Carolina Trough. This information is needed to model the tectonic and thermal process of rifting. Cruise also included the first major deployment of OBSes designed by Bruce Ambuter, after fixing major problems identified in earlier experiments.

Type of Activity: Refraction profiling, OBSes;Refraction profiling, OBSes

Information to be derived: Airgun refraction profiles
Explosive refraction profiles
OBSes

Summary: Explosive refraction data: 465 km; airgun refraction and single-channel streamer data: 305 km; continuous wave source data: 340 km; 3.5 kHz data: 1500 km; USGS OBS stations: 19; Scripps OBS stations: 6; CTDs: 4.

Contact: Anne Trehu ()

InfoBank: uses the identifier L-4-85-SE. Visit this site for more information.

Related Links:

- Download 85019.kml to view this field activity in Google Earth

Platform Info:

LYNCH

Publications resulting from these data

Trehu, A. M., Miller, G. K., Gettrust, J. F., Ballard, A., Dorman, L. M., and Schreiner, T.,1986, Deep crustal structure beneath the Carolina Trough [abs.]: Eos, Transactions, American Geophysical Union, v. 67, no. 44: p. 1102

Trehu, Anne M., Ballard, A., Dorman, L. M., Gettrust, J. F., Klitgord, K. D., and Schreiner, A.,1989, Structure of the lower crust beneath the Carolina Trough, U.S. Atlantic continental margin: Journal of Geophysical Research, v. 94, no. B8: p. 10,585-10,600. (Also available at http://www.agu.org/journals/ABS/1989/JB094iB08p10585.shtml)

Data Types and Locations:

Bathymetry

Geochemistry

Geophysics

Navigation

Logs

Chief Scientist's report of ship movement, personnel, equipment and data acquisition notes, OBS and CTD locations, and trackmaps.

Navigation log describing line and diskette start and end times, shot times, ship speed, instrument configuration and data acquisition notes, and 2 area track maps.

Cruise Curator's inventory of data collected at sea.

Seismics