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Abstract
Mineralisation occurs in a cluster of four outcropping hydrothermal breccia's containing Au with Cu and Ag. These breccia outcrops are located with a 400m x 400m perimeter, with the principal zone of the Tumi breccia outcrops being traced over an area of 70m x 60m;, and a second zone measuring 20m x 10m meter (located about 400m west and 250m below the principal zone). Two short diamond drill holes (90m and 72.5m lengths) were completed in the Tumi breccia in 2007 with re-assayed results reported in July 2013.
The focus of the magnetic survey was on the main Tumi breccia, which contains four known mineralized outcrops covering a surface area of approximately 1.6 km2 (400 m in strike and 400 m wide). Modeling of the magnetics data suggests that there is a measurable magnetic low anomaly associated with the Tumi hydrothermal breccia. If true (magnetic low features like the one over the breccia are common in the data set), the size of the Tumi breccia and its associated alteration is approximately 200m x 250m. This area needs to be drill tested, to better correlate the surface mapping results with the magnetic interpretation. One plausible explanation for the differing target size may be the fact that the exploratory shallow diamond holes, as well as trenches and channel sampling previously reported in July 2013 on the breccia target, have returned Au values in the host rocks as well as the mineralised structure.
The position of the Tumi breccia immediately adjacent to the main magnetic high anomaly suggests that there is an association between the breccia and the interpreted intrusive. This is highly possible, since the nature of the crackle breccia suggest the proximity to an intrusive body. Also, it can be seen the pervasive nature of the K-feldspar alteration and total replacement of magnetite by hematite in the breccia, thus explaining the low magnetic signature of the breccia. It should be noted that the both the exploratory shallow diamond drilling, as well as trenches and channel sampling, have returned Au values in the hosting rocks, as previously reported.