Abstract:
This data set contains underway geophysical data that were collected on NBP0701. The project consisted of a transit from Lyttelon, New Zealnd to the work are off of Cape Adare, Antarctica and then a transit from Cape Adare to McMurdo Base, Antarctica. Underway marine geophysical data (magnetics, gravity, Simrad EM120 swathmap bathymetry, and Bathy2000 3.5 KHz bathymetry), were collected during
... the entire cruise including on the transits. In addition, roughly 2000 kms of 48 Channel multi-channel seismic reflection data and 78 seismic refraction lines were collected in the work area off of Cape Adare. ADCP, temperature and salinity data were also collected along the entire track.
The main objective of the cruise was to study the geological transition between the deep water Adare Basin and the shallow water Northern Basin in the western Ross Sea. For this purpose, we studied the sedimentary sequences in both the Adare and Northern Basin as imaged in the seismic reflection and refraction data. The magnetic anomaly data were used to study the opening of the Adare Basin and Northern Basin in the late Eocene and Oligocene. In addition the underway geophysical data collected during the transit from Lyttelton to Cape Adare was used to study the pattern of seafloor spreading on the Pacific Antarctic ridge.
The underway geophysical data, including the magnetics, gravity, Simrad EM120 Sawthmap bathymetry and 3.5 kHz Bathy 2000 data, as well as the ADCP, temperature and salinity data have been submitted to the Marine Geoscience Data System (MGDS) archive at Lamont-Doherty Earth Observatory where the data are archived as part of the NSF funded Antarctic and Southern Ocean Data Synthesis. The magnetic, gravity, centerbeam bathymetry and Simrad EM120 swathmap bathymetry will be sent from the MGDS archive to the NGDC archive in Boulder, Colorado. The ADCP data will be sent from MGDS to NOAA archive in Honolulu. The seismic reflection data currently cannot be archived at a national facility; however they will be submitted to the Antarctic Seismic Data Library System (SDLS) located at the USGS in Menlo Park, CA and in Trieste, Italy. 
