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E53/893, ELA53/1302 & ELA53/1332
Introduction
The Mt Bartle group of tenements are located 45km west of Wiluna, and straddle the Wiluna-Meekatharra road in the vicinity of Mt Russell. Results to date show high copper, lead, and zinc values within an interpreted graben paralleling the structures related to a gravity anomaly within the Archaean basement. A major O’Driscoll lineament traverses the tenement which is located adjacent to the significant Magellan base metal deposit located 10 kilometres southeast of the leases. Sampling of the Rabbit Warren Gossan Prospect displays a strong Zn anomaly over 600 metres of one of three sampling traverses with coincident Pb, Ni and cadmium.
Geological Setting
Results to date show high copper, lead, and zinc values within an interpreted graben paralleling the structures related to a gravity anomaly within the Archaean basement. A major O’Driscoll lineament traverses the tenement which is located adjacent to the significant Magellan base metal deposit located 10 kilometres southeast of the leases. Sampling of the Rabbit Warren Gossan Prospect displays a strong Zn anomaly over 600 metres of one of three sampling traverses with coincident Pb, Ni and cadmium.
Previous Exploration E53/893
During the early years of tenure of the current licence field mapping and reconnaissance, soil sampling and geophysical interpretation were carried out. The objective was to provide information of underlying stratigraphy, and to follow up interpretation by previous workers of an extension of the Joyner’s Find Archaean greenstone belt in the area. Geophysical interpretation by Southern Geoscience Consultants Pty Ltd highlighted a magnetic linear trending northwest within the tenement. In addition, a previously unrecognised regional structural lineament was identified, trending east north east. The feature was interpreted as a significant fault zone which could represent a locus for mineralising fluids in a sediment hosted massive sulphide exploration model.
Rock chip samples identified anomalous zinc values up to 7480ppm Zn together with elevated pathfinders, arsenic and antimony (As and Sb). Elevated silver (Ag) values up to 24g/t Ag in addition to Zn values up to 1576ppm were also returned from gossanous float around the “rabbit warren” area (Figure 5).
Two vertical RC drillholes were completed in 2004, for a total of 400m. The first hole, MB1/04, was sited on the “rabbit warren” gossan area, and the second hole, MB2/04, tested the magnetic linear anomaly about 300m to the north of MB1/04 (Figure 6). Both drillholes intersected sulphidic carbonaceous shales. Maximum values for various elements are as follows:
gold 92ppb Au, silver 1.8 g/t Ag, Platinum 17ppb Pt, Palladium 35ppb Pd, Copper 670ppm Cu, Zinc 1650ppm Zn, Lead 50ppm Pb, and Molybdenum 83ppm Mo.
Significantly, both drillholes contain strongly anomalous PO4 (to 2.3%) coincident with anomalous Zn, Cu and As.
Three MAGLAG soil geochemistry survey traverses were completed, for a total of 75 samples, in the main target area between Mt Russell and Mt Bartle (Figure 7). The objective was to test the effectiveness of the MAGLAG method, which uses a partial digest (concentrated HCl) on samples collected of the Fe-rich magnetic fraction. The approach is designed to test for blind deposits.
MAGLAG results confirmed strong zinc anomalism, along with anomalous lead, nickel, antimony and cadmium on the western-most traverse. The “rabbit warren” area is associated with anomalous gold, zinc, cadmium, nickel, platinum, arsenics and antimony values. Barium values are anomalous in the northern portion of the area tested.
Drill holes sections for MB1/04 & MB2/04 showing Cu & PO4 values.
MAGLAG geochemical traverses (over detailed geology – GDA94).
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