A reassessment of Marathon Petroleum's 1979 regional stream sediment sampling programme led to the decision to resample a number of areas within EL 871. The Mt Neill and Mt Fitton areas were chosen, as a result of possible similarities with the Prospect Hill area to the north (EL 720) which is considered prospective for tin and tungsten. A number of reported occurrences of cassiterite in the Mt Neill area, supported by anomalous tin contents in magnetic separates from the 1979 programme, were considered to indicate potential tin and tungsten mineralisation. The existence of a number of old workings on copper vein deposits in the Mt Fitton area with minor gold and tungsten values, and a record of anomalous Mo values in stream sediment samples of the 1979 programme, instigated a variety of resampling programmes to test the potential for disseminated porphyry-style Cu-Au and Mo mineralisation. Within the Mt Neill area an intensive programme of stream sediment sampling indicated a number of areas of anomalous tin and tungsten within the sediments. Follow-up sampling helped to delineate these occurrences although, despite values in excess of 1 000 ppm Sn, rock and float sampling has not identified any cassiterite-bearing units. A number of areas of anomalous tungsten were identified with values greater than those detected during work within the Prospect Hill area. Little progress has been made at defining the tungsten mineralisation occurrences responsible for the observed stream sediment anomalies. Rock and float sampling and stream sediment sampling programmes in various parts of the Mt Fitton area were not encouraging. Resampling of a number of previously worked copper and gold occurrences indicated interesting but scattered and generally low trace element values. No potential for a large, low-grade Cu ± Au ± Mo deposit was identified. There is thought to be good potential for a tin ± tungsten deposit within the Mt Neill Block. The location and extent of such a deposit should be determined by a combination of rock and surficial cover sampling techniques.