Isotopic age of the Tollu Volcanics, W.A.
- 1 January 1967
- journal article
- research article
- Published by Taylor & Francis in Journal of the Geological Society of Australia
- Vol. 14 (2) , 235-238
- https://doi.org/10.1080/00167616708728661
Abstract
The Tollu Volcanics have been dated by the Rb ‐ Sr isochron method at 1060 ± 140 million years (95% certainty limit). The folded volcanics have an initial 87Sr/86Sr ratio of 0.705 and the scatter of the total‐rock points about the isochron is ascribed to post‐crystallisation redistribution of Rb and Sr. A rhyolite specimen from the Warburton area to the west fits on the isochron without significantly increasing the statistical error. The geological setting of the volcanics is briefly described. The importance of this age to the dating of the Late Proterozoic sedimentary sequence of the region is pointed out.Keywords
This publication has 4 references indexed in Scilit:
- The giles igneous province, central Australia. An example of an erolded volcanic zoneBulletin of Volcanology, 1966
- A proposal for time‐stratigraphic subdivision of the Australian PrecambrianJournal of the Geological Society of Australia, 1966
- The lower boundary of the Adelaide system and older basement relationships in south Australia∗Journal of the Geological Society of Australia, 1966
- The layered basic and ultrabasic intensives of the Giles Complex, Central AustraliaContributions to Mineralogy and Petrology, 1966