VANCOUVER, Oct. 15 /CNW/ - During 2007 - 2008, exploration of the Lac La
Hache project area of GWR Resources Inc. comprised geological mapping,
trenching and diamond drilling mainly on two tenures, ANN 1 which covers the
Aurizon zone and ANN 2 within which lies the Peach prospect. Limited work was
undertaken on the Murphy tenures in the southern part of the property and no
work other than limited prospecting was carried out on other tenures that make
up the Lac La Hache project area.
Geological Setting
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The Lac La Hache project area is underlain by volcanic, volcaniclastic
and associated strata of the Upper Triassic Nicola Group of the Quesnel belt,
a 200+ million year old island arc that formed west of North America at that
time. The Quesnel belt, or Quesnellia, along with a related belt, Stikinia,
hosts a number of gold enriched copper porphyry deposits such as
Ingerbelle-Copper Mountain, Afton, Mount Polley, Mount Milligan, Kwanika
Creek, Galore Creek and Copper Canyon. All of these deposits have common
characteristics such as mafic volcanic flows and breccias into which stocks of
dominantly monzonitic composition have been intruded. Copper-gold
mineralization is related to these intermediate to felsic intrusive complexes
and is commonly hosted by magnetitite-rich hydrothermal breccia.
ANN 1 Exploration
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As is typical of the region, the ANN 1 tenure is covered mainly by
glacial and fluvioglacial deposits and exposed bedrock is extremely limited.
Initial work that was carried out in the 1990's consisted of soil geochemical
and geophysical surveying which resulted in low order geochemical and induced
polarization anomalies. During subsequent prospecting activities a zone of
disseminated native copper in monzonite was recognized in the central part of
the ANN 1 tenure, a zone which is now referred to as the Aurizon zone.
In late 2006, a ten-hole drilling programme was initiated over the
Aurizon zone which resulted in the discovery of chalcopyrite-bornite
mineralization that was enriched in gold, beneath the previously recognized
zone of native copper mineralization. In 2007, a trenching programme was
undertaken across the northern part of the ANN 1 tenure which exposed bedrock
which, in places, contained anomalous copper and gold. Mineralization exposed
in the trenches comprised two groups, one that confirmed mineralization of the
Aurizon zone and a second which suggested the presence of a copper-gold zone
to the northwest of the Aurizon zone.
In the spring of 2007, a diamond drilling programme was begun, initially
to the north of the Aurizon zone (drill holes AZ07-11-18) and then within and
adjacent to the Aurizon zone (approximately 50 drill holes). This initial
drilling was aimed at defining the nature of the Aurizon zone, the
distribution of mineralization within the zone, its size and configuration,
the types and distribution of hydrothermal alteration assemblages, the
relationship between alteration assemblages and mineralization and solving the
structural complexities that were recognized at an early stage. Later drilling
was designed to test an additional area of interest in the northwestern part
of the ANN1 tenure, an area that trenching results suggested was prospective
for copper-gold mineralization. Results of this drilling were inconclusive as
many of the holes drilled here were to define the geology of the area and not
to define copper-gold mineralization per se. The Company's drilling permit for
the ANN 1 tenure was exhausted by summer of 2008, at which time 95 drill holes
had been completed for a total of almost 30,000 metres of drilling.
The most encouraging result from exploration of the ANN 1 tenure during
2007-2008 was the recognition that the Aurizon zone, as currently defined,
consists of copper-gold mineralization hosted by a hydrothermal breccia pipe
that plunges steeply to the north within a larger zone of potassically altered
monzonite. The dimensions of the breccia pipe have not been fully defined: its
near surface expression is about 100 metres in diameter but it increases in
size down plunge and is truncated both to the north and the south by
northwesterly-striking faults. Limited drilling to the north and the south
strongly suggests that both a northerly and southerly continuation of
mineralization exists as hydrothermally altered monzonite, along with
anomalous copper-gold mineralization, has been intersected in reconnaissance
drill holes both to the north and the south of the breccia pipe.
Statistical studies of the distribution of copper-gold mineralization
indicates that there are two copper and gold populations within the Aurizon
zone.
