Announcement • Nov 24
Redstone Resources Limited Announces Significant High Grade Copper Intersected At Tollu, West Musgrave
Redstone Resources Limited announced that preliminary analysis by handheld pXRF (hhpXRF) of recent reverse circulation (RC) drilling has successfully proven that thick high-grade lenses of copper mineralization intersected in historical drilling at the Chatsworth Prospect (Chatsworth), Tollu, have significant volume vertically and extend to shallower depths. The recent Chatsworth intersections include downhole thicknesses for copper mineralisation of up to: 28m at 1.2% copper from only 62m downhole depth (TLC189); and 16m at 2.62% from 74m downhole (TLC190). Chatsworth is part of the Tollu Copper Vein deposit on the Company's 100% owned West Musgrave Project (the Project) in Western Australia. Four reverse circulation (RC) drill holes, TLC188, TLC189, TLC190 and TLC192, for a total of 756m were drilled at the Chatsworth Prospect at the Tollu Copper Vein deposit (Tollu) to test for continuity of mineralization vertically through the hosting subvertical vein system, and in doing so, test if the thick high grade copper mineralization previously intersected in early drilling held volume between and beyond the historical drill holes, particularly at shallower depths than previously intersected. The early historical drilling at Tollu, primarily completed in 2010 and the results of which are included in the Tollu maiden resource1 defined in 2016, intersected very high grade copper over seemingly thick lenses of mineralization in individual drill holes but at the time, was not tested adequately along the vertical extent of the hosting quartz vein system. For instance, two historical holes, TLC033 and TLC034, drilled in December 2010, intersected a thick lens of high grade copper mineralization that may have pinched and swelled within a subvertically oriented vein system with 5m at 2.21% copper from 100m downhole in TLC033 but swelling to 15m at 1.39% copper from 136m downhole in TLC034, a vertical distance between intersections of approximately 35m. However, despite the excellent intersections and despite 35m representing a relatively long distance in terms of potential spatial variation of mineralization in a vein hosted system, no other drilling has since been undertaken along the line to test vertical continuity of mineralization. In this drilling programme, Redstone tested this line with two drill holes, TLC188 and TLC189, targeting approximately 1520m vertically above the intersection in TLC033 and 2530m vertically below the intersection in TLC034. According to preliminary hhpXRF analysis, the recent drilling successfully proved that the thick high grade copper mineralization seems to continue vertically, being maintained in the deeper intersection with 12m at 1.91% copper from 175m downhole, including 8m at 2.78% copper from 175m downhole (in TLC188) and swelling considerably in the shallower intersection with 28m at 1.2% copper from only 62m downhole, inclusive of 2m at 3.1% copper from 67m downhole (in TLC189). TLC188 and TLC189 have proven that the thick high grade copper mineralization intersected at Chatsworth in historical drill holes extends considerably shallower and deeper than historically delineated. In the particular location represented TLC188 and TLC189 have extended the vertical continuity of the copper mineralization to double previous with at least some 100m of vertical extent, seemingly continuous and still open at depth and towards the surface. What previously seemed a contraction of mineralization towards the surface in TLC033, is most likely a `pinch' in a pinch and swell morphology. Some 90m to the south of TLC188 and TLC189, drill hole TLC192 aimed to test for a further shallower continuity of thick high grade mineralization intersected by historical drill holes TLC024, TLC031 and TLC030 in December 2010. TLC192 was positioned to test for continuity approximately 20m vertically above the 9m at 1.29% copper from 86m downhole intersected by TLC030; it showed a swelling of the mineralization to 19m at 1.08% copper from 54m downhole inclusive of 3m at 3.45% copper from 63m downhole. The shallow extension of mineralization by TLC192 extends the high grade mineralization in this location to some 120m vertically and is open towards the surface. On the historical drilling line between those above, some 50m to the south and 40m to the north, the recently drilled RC drill hole TLC190 was aimed at testing at a shallower depth (20m above vertically), a thick high grade lens of mineralization intersected in historical drill hole TLC015, drilled in April 2010, which intersected 20m at 2.45% copper from 178m downhole depth. An historical hole, TLC032, was drilled `above' TLC015 (some 30m vertically), however it was terminated at 139m downhole depth and so never tested directly above the mineralization in TLC015 outlined above. The recent drill hole, TLC190, showed a thinning of the mineralization lens and a decrease in grade to 7m at 0.28% copper from 190m downhole.