GEMOC ARC National Key CentrePalaeomagnetic Investigation of Late Palaeozoic Volcanic Units From the Northern New England Orogen, Queensland, Australia.
Lackie, M.A.
GEMOC, Macquarie
The New England Orogen of eastern Australia comprises a number of Palaeozoic and Mesozoic terranes. This paper presents the results of a paleomagnetic study of volcanic units from the southern part of the Connors-Camboon Province in Queensland. The age range of the Province is 320 - 280 Ma, with this study concentrating on the Late Carboniferous Torsdale Volcanics and the Early Permian Camboon Volcanics from the Cracow area. The Camboon Volcanics sampled were generally andesitic ignimbrites and lavas yielding a primary direction in both magnetite and haematite carriers. All directions were reversed and initial analysis of the data shows a southerly steep down direction consistent with other Australian Early Permian data. The Torsdale Volcanics sampled were generally silicic ignimbrites that yielded a primary direction in both magnetite and haematite carriers. Initial analysis shows that the directions are generally reversed, although some normal polarities are observed. The directions are not as steep as those observed for the Camboon Volcanics and show a more westerly character, consistent with the Late Carboniferous age of the unit.
