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The geology of the sideling range


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Thompson, D 2000 , 'The geology of the sideling range', Honours thesis, University of Tasmania.

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The Sideling Range is comprised of Mathinna Group sediments on the western
margin of the Scottsdale Batholith. The Sideling Range is situated close to an
informally proposed stratigraphic transition within the Mathinna Group that has been
documented but not comprehensively mapped or defined. The Sideling Sandstone has
been informally proposed as a distinct unit from the underlying Bellingham
Recent prospecting around the Sideling Range has also revealed a small area of gold
mineralisation within a contact aureole, opening the possibility that the gold is related
to granite intrusion rather than a typical turbidite hosted mesothermal gold vein style.
This thesis studies the structure and sedimentology of the Sideling Range. It defines
the Sideling Sandstone and discusses the proposed stratigraphic transition. It also
investigates the nature of the gold mineralising fluid.
The Sideling Range consists of first generation NNW trending folds that conform to
the regional structure of the Mathinna Group. Faulting within the Sideling Range is
rare and small-scale and post Dl deformation is mainly only evident within the
contact aureole.
The Sideling Sandstone unit is approximately 1500 metres thick. It is a fine to
medium-grained sandstone that is dominated by thick and massively bedded
sandstones that are interlayered with thinner bedded classical turbidites as well as
siltstone. The Sideling Sandstone is more thickly bedded than the Bellingham
Formation and is from a more proximal environment on the submarine fan. The
Sideling Sandstone was deposited in an ancient channel environment.
The study of sulphides within the gold mineralised veins revealed that the fluid, which
formed the veins, had a magmatic component.

Item Type: Thesis - Honours
Authors/Creators:Thompson, D
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