Journal article

Cenozoic fault control on 'deep lead' palaeoriver systems, Central Highlands, Victoria

GR Holdgate, MW Wallace, SJ Gallagher, RB Witten, B Stats, RE Wagstaff

AUSTRALIAN JOURNAL OF EARTH SCIENCES | TAYLOR & FRANCIS LTD | Published : 2006

Abstract

Basaltic eruptions across the Central Highlands of Victoria have sealed in-place Early to middle Cenozoic palaeodrainage systems (also known as deep leads). The basal gravels of the deep leads have been mined extensively in the past for their rich placer-gold deposits. Detailed mapping of the distribution of all palaeorivers has been carried out using drilling results and modern aeromagnetic/radiometric surveys. The palaeochannel isopachs (including basalt and sediment) do not thicken in a modern downvalley direction. Instead, deeper depressions alternate with shallower areas. The variations in thickness, and parts of the palaeochannel courses, are controlled by a series of east-northeast-tr..

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