EL 23897 First annual report year ending February 2005, Second year MMP Plan year ending February 2006

Abstract

EL 23897 is situated approximately 20 km SE of Tennant Creek. A search of open file reports held by the department indicated that the area bounded by EL 23897 has received little attention since the mid 1990's and there were no reported findings prior to that date. A joint venture between North Flinders Mines Ltd and Roebuck Resources NL explored an area under EL 7793 overlapping, and on the eastern extremities of, the new tenement EL 33897 up until August 1995. This work resulted in the definition of copper/gold anomalism, by vacuum drilling, that lies immediately adjacent to the new tenement boundary. Further to the west, Giants Reef Exploration Pty Ltd held EL 7806 between February 1994 and February 1995. No additional information or data is reported as being generated during the period that EL 7806 was held. The generation of the Tennant Creek Integrated Interpretation of Geophysics and Mapped Geology in 2003 by the Northern Territory Geological Survey acted to confirm the prospectivity of the area within EL 23897. Included in the list of factors that provided potential for mineralisation are; the largely under explored tenement holding; the proximity of anomalous copper/gold trends; the presence of the prospective Warramunga Siltstone sequence; the presence of Felsic Porphyry Intrusives; the fault structure and potential dilation setting. It can be observed on the 1:250,000 geology and geophysics map that throughout the field that the majority of ore deposits occurring within the Warramunga sequence also occur in close proximity to intrusive felsic porphyries. Of potential significance is the large flexure, centred at 438000mE within EL 23897, in the mapped fault (1:250,000 geology and geophysics map sheet) located south of the line of mineralisation that includes the mines at Nobles Nob and Juno. With the evidence of copper/gold anomalism in the immediate vicinity a geophysics program was planned targeting low magnetic intensity quartz-hematite ironstones. Working from the western extremity eighty-five percent of the total tenement area was covered by a ground based gravity survey. The survey density was at line spacing of two hundred metres with a station spacing of twenty five metres. Following the initial survey the raw data was manipulated and Bouguer and first vertical derivative gravity plots produced. It was evident that a major response had been picked up concordant with the direction of fault flexure in the centre of the exploration licence. A detailed survey closing the line spacing to 25 metres was then completed for the area immediately surrounding the response. Manipulation of detailed survey data (Lindeman Geophysics Pty Ltd) associated with the central gravity anomaly Gz (mgal) of 0.86 produced a series of potential higher density bodies. Ten declined Reverse circulation drill holes are proposed to test modeled bodies one and three to depths between fifty and one hundred and fifty metres.