The Mt Gordon and Tay project areas comprise
two contiguous exploration licences of E63/861 and E63/876
that cover a total of 129km2 in the south of the Lake Johnston
greenstone belt. The tenements are prospective for nickel
sulphides and also have the potential to host gold
mineralisation.
Mt Gordon and Lake Tay areas cover a
north to northwest striking greenstone sequence of ultramafic,
mafic, sedimentary and felsic volcanic rocks of the southern
Lake Johnston greenstone belt. A layered gabbro known as the
Medcalf Sill intrudes mafic and ultramafic rocks along the
south-eastern parts of the belt with sporadic outcrops in the
northern parts of the Mt Gordon project area.The western and
eastern boundaries of the greenstone sequence are marked by
strike parallel shears that largely define the contact with
the surrounding granitoid terrain. Regolith in the region is
dominated by aeolian sand, which based on RAB drilling data in
adjacent tenements, overlies transported clays up to 10m
thick.
The scope of early exploration in the southern
parts of the Lake Johnston greenstone belt was limited by the
lack of outcrop and, as a consequence, was confined to a
relatively small area. However, later detailed aeromagnetic
surveys suggested that a more widespread distribution of
prospective stratigraphy was present under cover. Early
exploration work, between 1966 and 1989 was completed by
Western United, Laporte, Amoco Minerals Australia Co., Cyprus
Gold Australia Corp. and Precious Metals Australia Ltd.
Their work included geological mapping, gridding,
surface geochemistry, and RAB drilling. Results of soil
sampling located several gold anomalies to the north of the
current Mt Gordon project area. Also, drilling outlined an
Inferred vanadium resource, situated 3km northwest of the Mt
Gordon tenement, of 16Mt grading 12% titanium, 0.8% vanadium,
hosted by the Medcalf Sill. Later work from 1990 to 2001 was
carried out by LionOre, Goldfields Exploration Pty Ltd and
Mount Burgess Mining NL, testing areas under cover. These
programs outlined extensive gold anomalies in ground adjoining
the Mt Gordon tenement, and within the Tay tenement.
Exploration within the Tay project area detected several
geochemical anomalies with numerous bedrock conductors.
Subsequent RC drill testing of a number of these anomalies
intersected sulphide (pyrite and pyrrhotite) mineralisation.
Although nickel content of the sulphides was of low tenor,
gold analyses including 1m @ 2.97g/t Au were returned. These
results confirm the presence of nickel and gold prospective
stratigraphy within the project area and suggest further work
is required to follow-up untested bedrock conductors and gold
targets.
For the Mt Gordon and Tay project areas
Regency has proposed an exploration program including a
compilation and review of previous exploration data,
interpretation of aeromagnetic and Landsat imagery, geological
mapping and RC drilling. These methods are appropriate to
follow-up existing nickel sulphide targets.
Based on an independent
geological report prepared by Baxter Geological
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