Pre-Cenozoic geology of the Latrobe Valley Area-onshore Gippsland Basin, SE Australia
GR Holdgate, MW Wallace, S Forbes
Australian Journal of Earth Sciences | TAYLOR & FRANCIS LTD | Published : 2015
In 2010–2011, a well on the uplifted northern edge of the Latrobe Valley (Yallourn North-1A) cored a 550 m section of mostly arenaceous sediments from the Lower Cretaceous Tyers River Subgroup. A follow-up core-hole (Yallourn Power-1) aimed at extending the Tyers River Subgroup section some 5 km south into the Latrobe Valley instead encountered Paleozoic basement rocks immediately below Cenozoic coal measures. From a re-examination of earlier coal and groundwater bore results, and new interpretations from gravity, seismic and magneto-telluric (MT) surveys, there is a significant area of Paleozoic basement rock that may underlie the whole northern Latrobe Valley area. The uplifted Yallourn No..View full abstract
Acknowledgement must go first and foremost to my colleagues Ingrid Campbell, Tim O'Brien, Sharwon Sun, and James Martindale in Lakes Oil N.L., and in particular Robert Annells (MD), who has the courage to pursue the Strzelecki Group petroleum prospects in onshore Gippsland. Thanks to Richard Macrae (formerly Greenearth Energy) for producing the gravity and MT results, and to Alan Partridge for allowing use of the Yallourn North-1A palynology results. Insightful discussions on petrology, maturation and radiometric data from Ian Duddy of Geotrack are gratefully acknowledged. Our thanks also go to the reviewers of the manuscript David Taylor (GSV) and Mike Hall (Monash Geology) for their reviews and suggestions for improvements. Sade Forbes' MSc project at Melbourne University was sponsored by the Geological Survey Victoria.