TAMARA Aeromagnetic Measurements and Ancillary Geologic Databases, Southern Victoria Land, Antarctica

The TAMARA (Transantarctic Mountains Aerogeophysical Research Activities) program acquired aeromagnetic measurements from a helicopter-towed magnetometer with coordinates (latitude, longitude, height) acquired with GPS. The survey was flown from December, 1997 to January, 1998 and 14,100 line kilometers of aeromagnetic data were collected over an area just under 30,000 square kilometers in size. The survey area extends southward from Ferrar Glacier to the Mulock Glacier Cook Mountains area, encompassing the Royal Society Range, Skelton Neve and the Morning and Discovery volcanoes, in southern Victoria Land, Antarctica. Over most areas, magnetic data were collected with 2.5 km spacing between ~east-west grid lines and with ~north-south tie lines every 25 km. The survey was flown in semi-draped mode, with terrain clearance of 300-500 meters in most places. Ground-based gravity measurements (65 points) were also collected at Skelton Neve. The aeromagnetic data are described at the USGS-Denver web site and the contact person is Dr. Carol Finn ([e-mail]). Parameters measured are LAT, LONG, BASE MAGNETIC INTENSITY, TOTAL FIELD MAGNETIC ANOMALY, BASE STATION CORRECTED MAGNETIC ANOMALY, INTERNATIONAL GEOMAGNETIC REFERENCE FIELD CORRECTED MAGNETIC ANOMALY, LEVELED MAGNETIC ANOMALY. Data available includes Line Data (both raw and processed fields in an ASCII file) and a grid of leveled aeromagnetic data (in ERMapper, Oasis and ASCII formats). Digital databases of bedrock geology, satellite imagery, surface and bedrock elevation, geographic features, and structural lineaments were developed and compiled in a GIS using ArcView software at Ohio State University, contact Dr. Terry J. Wilson for further information and access ([e-mail]).