Annual report on EL 5287 Mt Tymn, year ending 20 May 1989

Abstract

Mt Tymn (EL 5287), was granted on 20th May, 1987 and forms part of a joint venture (JV) agreement between Billiton Australia, The Metals Division of The Shell Company of Australia Limited, and Mr G. Hamilton of Queensland. Billiton Australia (BAUS) are managers and operators of the joint venture. The geology is well exposed along the Mt Tymn ridge and comprises of coarse to medium grained sandstone, fine sandstone and siltstone of the Early Proterozoic Burrell Creek Formation. Bedding strikes north north-west (NNW) with steep easterly dips. Gold mineralisation on Mt Tymn is hosted in sheeted quartz-limonite veins and fine limonite veinlets in the more competent, coarse grained lithologies of the sedimentary package. Veins are generally subparallel to bedding, although minor cross-cutting vein systems have been recorded. Grid based soil sampling over Mt Tymn defined three gold bearing anomalies. The first anomaly (maximum l2lppb Au) trends NNW over 150m on the northern extension of the ridge. This anomaly is confirmed by rock chip samples which contained grades of up to 7.25g/t Au. The second anomaly strikes NW and occurs on the eastern side of Mt Tymn and appears to be a continuation of the northern anomaly. The third soil anomaly (maximum 62.7ppb Au) is at the base of the Mt Tymn ridge, in the drainage path of old gold workings. This anomaly reflects transported gold bearing gravels and scree rather than in-situ gold mineralisation. Drilling is proposed over the gold targets to test mineralisation at depth. However, the gold targets have recently been pegged by 19 MCN's (No's 3022-3040) and thus drilling results will be reported in the Annual Report for the MCN's.