An aeromagnetic survey was flown over the offshore region northeast of Cape Adare and the magnetic
anomalies compared to onshore structures between Pennell Coast and Tucker Glacier. The magnetic anomalies show
two nearly orthogonal major trends. NNW-SSE trending anomalies northeast of Cape Adare represent seafloor
spreading within the Adare Trough. A connection of these anomalies to the Northern Basin of the Ross Sea is not clear.
Onshore faults are closely aligned to offshore anomalies. Main trends are NW-SE to NNW-SSE and NE-SW to NNESSW. NNW-SSE oriented dextral-transtensional to extensional faults parallel the Adare Peninsula and Adare Trough
anomalies. NE-SW trending normal faults appear to segment the main Hallett volcanic bodies.
Additional Publication Details
USGS Numbered Series
Magnetic anomalies northeast of Cape Adare, northern Victoria Land (Antarctica), and their relation to onshore structures