Annual report for EL 24931 Burrundie, for the year ending 17 July 2008

Abstract

The Burrundie EL lies in the central portion of the Pine Creek Orogen. The orogen consists of Early Proterozoic meta-sedimentary rocks on an interpreted granitic Archean Basement. The Proterozoic rocks are tightly folded on NW trending axes and metamorphosed to greenschist facies. The meta-sedimentary rocks are intruded by pre-deformational basic igneous rocks and post-deformational granites.EL 24931 lies over an area of tightly folded meta-sedimentary rocks assigned to the South Alligator Group intruded by broadly conformable sills of Zamu Dolerite. The McKinley Granite intrudes the sediments in the eastern part of the El, while the Prices Springs Granite intrudes the sediments in the far NW of the EL. The EL covers the strike extension of the Pine Creek Shear-zone which hosts the bulk of the gold mineralisation in the Pine Creek area. Work carried out consisted of a compilation and review of historical reports, the capture of historical data in the companies GIS system and some 25km of ground radiometric traverses to investigate anomalies identified from multi-client airborne geophysical data. Seven rockchip samples were collected during the period. Aster imagery covering the EL was purchased during the period and preliminary processing commenced. The ground traverses completed to date show that weak to moderate airborne uranium (Bi 214) channel anomalies are caused by ferruginised carbonaceous siltstones and tuffaceous siltstones of the Koolpin and Gerowie Tuff formations. Readings obtained over some of these rocks, while elevated compared with other rock-types in the area are considered to be of normal background for the rock type in question. No significant uranium assays were obtained from the rock chip sampling. Some of the more prominent anomalies and the historical Burrundie uranium occurrence have not been visited yet due to access issues. Exploration of the EL is at an early stage. The acquisition of the EL by Thundelarra relatively late in the reporting period has meant little time was available for comprehensive fieldwork. The compilation of historical geochemical data is incomplete, but suggests that any Au or base-metal mineralisation present on the El will be concealed. Little historical company U, Ni or Sn exploration has taken place, and these elements have generally not been assayed for by modern explorers. The presence of known Tin workings in mining claims excised from the El point to exploration potential for Tin. Broad zones of Zamu dolerite may be prospective for Ni-Co, while the margins of the McKinley Granite may host uranium mineralisation.