OCCURENCES AUSTRALIENES | ||
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DEPARTMENT OF PRIMARY INDUSTRIES DPI 1:100
000 Map Area Project
team Project
scope Description Its
geological history involved deposition of a large volume of turbidites
in a deep water setting (Pinnak Sandstone and Bendoc Group) that were
then deformed and intruded by large granites during the Benambran and
Bindian orogenies. Both regional and contact metamorphism accompanied
intrusion of the granitic rocks. Early Devonian crustal extension resulted
in emplacement of the bimodal Tintaldra Dyke Swarm, eruption of the Mount
Burrowa Volcanic Group and intrusion of a suite of strongly fractionated
leucocratic granites. These rocks are regarded as a co-genetic suite.
The Dartella Caldera also formed at this time. The area was deformed again
after the eruption of the calderas, possibly during the Tabberabberan
Orogeny. The
dearth of preserved rocks of Late Devonian to Late Cretaceous age remains
a major problem for the tectonic reconstruction of this time period. A
landscape of low relief and probably low elevation had formed over most
of southeastern Australia by the end of the Late Mesozoic. The
structural history involves deformation, metamorphism and intrusion in
the Early Silurian Benambran Orogeny, followed by southward transport
of the Omeo Zone during the Bindian Orogeny. A group of Early Devonian
intrusions cuts across the predominant north to northwest trend of the
folds and granite foliation and therefore post-dates this deformation.
Post-Early Devonian deformation produced a series of mostly north- to
northeast-trending brittle faults and alteration zones, and probably reactivated
existing NNW-trending faults. Much later movement, followed by erosion,
led to large relief changes across some of the northeast trending faults,
such as the Walwa Fault. View
north from Mount Boebuck. The plateau in the distance is formed by the
Large tors of Harringtons Tonalite exposed along the Indi River. Folds in Pinnak Sandstone along the Indi River. Pine Mountain
fluorite mine workings, 1950's. Products
Simplified
geological map of CORRYONG.
Contacts Page Top
© The
State of Victoria, 1996 - 2007. http://www.dpi.vic.gov.au/dpi/nrenmp.nsf/FID/-8347BB3E13A11D7A4A256AB100164C26?OpenDocument
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This mineralogical site is located on private ownerships. It can still be
covered by a mining title. Anyway, these pages cannot be an authorization
or an incentive to collect mineralogical sample there.
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the mineralogical sites and you will be respected. |
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E. Guillou-Gotkovsky© 2000-2017
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17/12/09
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