In November 1958, whilst engaged on mapping the Willochra one mile sheet for the Department of Mines, the author and C. Von der Borch made a brief field inspection of the structure known as the Blinman Dome. Observations made on this inspection suggested that the Blinman Dome use a diapiric structure, related to diapiric phenomena mapped on the Willochra Sheet (Geological Survey South Australia). In July 1959, the Department of Mines undertook a gravity traverse across the structure, extending out into the neighbouring country for several miles. Subsequently, additional traverses were run to confirm the preliminary results, and at the same time an opportunity was taken to geologically map portion of the control part of the structure, and determine its relationships to the enclosing country rocks. The geophysical surveys were carried out by I. A. Mumme, and the author spent several days in the field on the geological investigation. Petrological examination of various rock samples were carried out by W. Fander of the Australian Mineral Development Laboratories.