Introduction

A geophysical survey was made along part of Browning Pass (Figure 15) to determine the basement structure beneath the ice. The survey, not originally planned in the geophysics programme, was made following a decision to do work near Gondwana Station during periods of bad weather or when helicopters were not available to support planned surveys. Browning Pass was chosen for study because of the suggestion of a fault that extends along the pass, on the basis of differential folding of Priestley schist on each side of the pass (Skinner, 1983). The objective of the survey was to determine whether a fault could be detected using geophysical methods. The survey consisted of gravity magnetic, and radio echo-sounding measurements, but only the gravity survey is described below.