Nathaniel B. Palmer 0102 - underway geophysical data

We collected gravity data using a shipboard Lacoste-Romberg gravimeter, magnetic field data using a proton precession magnetometer towed behind the ship, and centerbeam depth (bathymetry beneath the ship). IGRF2000, calculated for the appropriate date and location, was subtracted from the observed magnetic field to yield the total field magnetic anomaly.

The major scientific objectives of the cruise were: a) survey a flowline between the South America and Africa plates just north of the Falkland-Agulhas fracture zone, including across the modern spreading axis, to obtain the magnetic anomaly sequence of the Cretaceous-Cenozoic mixed polarity superchron b) survey a small section of the Agulhas FZ with single-channel seismic data c) survey the northern edge of the Falkland Plateau with swath bathymetry d) collect ADCP data along the track A related data sets that cannot currently be archived at NGDC is single-channel seismic data, which is available from the chief scientist.