お知らせ • Jul 28
Stavely Minerals Limited Announces Thick Zones of Strong Cayley Lode Mineralisation Intersected
Stavely Minerals Limited reported further significant results from the ongoing resource drilling program within the high-grade Cayley Lode discovery at the Thursday's Gossan prospect, part of its 100%-owned Stavely Copper-Gold Project in Victoria. An intensive resource drill-out is continuing with the focus on extending the deposit to the south-east and at depth within the (now) overall 1.5km-long discovery zone, with in-fill and step-out drilling continuing based on a roughly 40m x 40m drilling grid. The Mineral Resource drill-out is well advanced and continues to generate impressive results, which have significantly extended the Cayley Lode mineralisation. Prior to the onset of the winter rains, a number of diamond drill holes were completed to fill gaps in the drilling for the maiden Mineral Resource Estimate, expected to be completed towards the end of the year. Drill hole SMD156 intersected the Cayley Lode in a position above the Low-angle structure (LAS): 22.8m at 2.27% Cu, 0.38g/t Au and 19g/t Ag from 247m, including 3m at 6.86% Cu, 1.00g/t Au and 11g/t Ag; and 4.7m at 4.07% Cu, 0.78g/t Au and 77g/t Ag. Drill hole SMD156W1 was drilled as a wedge hole to SMD156 given that it had an interval of lost core in the Cayley Lode mineralisation. SMD156W1 returned the following intercept: 23.1m at 1.67% Cu, 0.25g/t Au and 19g/t Ag from 246.9m down-hole, including: 3.1m at 6.21% Cu, 0.69g/t Au and 77g/t Ag. Drill hole SMD130 also intersected a large, low-grade shallow intercept in the chalcocite- enriched blanket of 59m at 0.48% Cu from 15m down-hole, including a higher-grade intercept of 3m at 1.82% Cu from 37m. Drill hole SMD130 also intersected the Cayley Lode above the LAS including: 13.05m at 0.83% Cu, 0.26g/t Au and 5.5g/t Ag from 127m down-hole, including: 2.05m at 1.76% Cu, 0.39g/t Au and 7.0g/t Ag from 138m; and, further down-hole an impressive base metal /precious metal intercept of. 5m at 1.24g/t Au, 35g/t Ag and 6.09% Zn from 181m, including: 1m at 1.67g/t Au, 149g/t Ag, 0.87% Cu, 0.12% Pb and 25% Zn from 181m. Drill hole SMD131 intersected the chalcocite-enriched blanket, returning an intercept of 27m at 0.85% Cu, 0.12g/t Au and 5.3g/t Ag from 18m down-hole, including: 9m at 1.82% Cu, 0.20g/t Au and 11g/t Ag from 28m, including 4m at 3.11% Cu, 0.26g/t Au and 20g/t Ag from 32m. Drill hole SMD136 intersected a large interval in the chalcocite-enriched blanket, returning 75m at 0.32% Cu from 29m down-hole, including: 5.8m at 1.39% Cu, 0.19g/t Au and 8.0g/t Ag from 30m. Drill hole SMD139 returned a large low-grade intercept of 79m at 0.38% Cu, 0.10g/t Au and 4.7g/t Ag from 94m down-hole, including: 9m at 1.25% Cu, 0.18g/t Au and 19g/t Ag from 94m. Drill hole SMD154 intersected a very wide interval of anomalous copper with 189m at 0.25% Cu from 21m down-hole, including an intercept in the chalcocite-enriched blanket with 29m at 0.40% Cu from 21m. Drill hole SMD154 intersected the Cayley Lode below the LAS returning 9.3m at 0.26g/t Au, 4.2g/t Ag and zinc to 0.18% from 355m down-hole. This intercept is interpreted to reflect `distal' base-metal /precious-metal mineralisation, similar to the intercept of 5m at 2.35% Zn, 0.40% Pb, 0.25% Cu, 1.67g/t Au and 27g/t Ag in SMD073, located at the extreme north- west end of the drill grid. Mineralisation in the Cayley Lode does appear to demonstrate a distinct southerly plunge. This peripheral zinc/lead ± gold/silver style of mineralisation is also demonstrated by early drill holes SMD013 and SMD014 with: 15m at 0.14% Zn from 397m, and 1m at 8.44% Pb and 98g/t Ag from 412m in SMD013; and 31m at 0.46% Zn from 483m, including: 2m at 1.25% Zn from 494m in SMD014. These results are all entirely consistent with drill holes SMD013, SMD014, SMD073 and SMD154, having drilled underneath the plunge of the high-grade copper-gold-silver mineralisation of the Cayley Lode and displaying a distal style of base-metal/precious metal mineralisation. This style of distal mineralisation is also consistent with the Magma, Arizona model of mineralisation. There is a zonation from proximal copper-gold-silver mineralisation with progressive evolution of copper-sulphide species from chalcopyrite -> bornite -> chalcocite (hypogene) -> covellite (hypogene) -> enargite - a progression to higher sulphidation state copper sulphides associated with decreasing pH - through to sphalerite (Zn sulphide) in the cooler peripheral zones. As the metals mineralising system waxes and wanes over time, a complex pattern of proximal /distal mineralisation styles can be over-printed upon the other, or be in close spatial proximity separated by time. This is the case with drill hole SMD130 (reported in this announcement) with interpreted earlier copper-gold-silver mineralisation in close proximity with later base metal /precious metal mineralisation including: 13.05m at 0.83% Cu, 0.26g/t Au and 5.5g/t Ag from 127m down-hole, including: 2.05m at 1.76% Cu, 0.39g/t Au and 7.0g/t Ag from 138m; and, further down-hole an impressive base metal /precious metal intercept of: 5m at 1.24g/t Au, 35g/t Ag and 6.09% Zn from 181m, including 1m at 1.67g/t Au, 149g/t Ag, 0.87% Cu, 0.12% Pb and 25% Zn. The southerly plunge to copper-gold-silver mineralisation is possibly also impacted by structural displacement with strike-slip movement on the LAS. While there is a modest 50m reverse movement on the LAS, it would also appear that the strike-slip movement may be in the order of a few hundred metres to the south-east given that significant copper-gold-silver mineralisation under the LAS has been intersected in several drill holes in the south-eastern portion of the drill grid.