Tennant Creek project Mammoth Prospect annual report mineral claims.

Abstract

Geology - The area has been mapped at 1:1000 scale including a brief look over the excised Mammoth Mine which follows a major north-west/south-east shear zone. A series of pits within BIF and exposing siliceous dolomite alteration with malachite staining, and minor magnetite, south of and parallel to the Mammoth shear, are the only workings within the joint venture area. Sampling returned low gold values but moderate bismuth and high copper. In the north-west of the area are a couple of outcropping ironstone (hematite) lodes. They don't appear to be shear controlled but lie along strike from the main Mammoth lode and are in a favourable position, being associated with BIF's, hematitic sediment and a possible minor anticlinal flexure. Also outcropping within the area are some porphyries but their significance, if any, is not known. Also trending approximately north-west/south-east is a major quartz vein which is a prominent feature marking the fault which passes through the area. The vein of Buck quartz has minor iron staining and has no mineralization associated with it. The general dip throughout the area is towards the south-west, but there are several minor flexures and folds with the general fold plunges towards the south-east as seen in areas to the south. Geochemistry - The Mammoth block, including the excised mine (permission obtained from the holder), was gridded by compass and chain at 200 m line spacing, prior to the completion of a lag sampling survey (Carver et. al., 1987) at 200 m x 25 m spacing. A total of 139 samples were taken and analysed for gold (to ppb levels), copper and bismuth. Values in the proximity of the Mammoth Mine were expectedly high, largely accounted for by material dropped around the hill and tailings from the old battery site. The rest of the area was not noticeably anomalous, but due to the wide spread of wind blown tailings which has masked the primary geochemical signature over much of the ground, other techniques are required. Geophysics - The Mammoth prospect is included in an area flown by Aerodata for magnetics and radiometrics. Line spacing was 200 m and flight height 60 m. Results from this survey have been processed and interpreted by Aerodata. There is no indication of any obvious magnetic targets within the Mammoth block, but several prominent lineaments, that are spatially associated with historic workings nearby, pass through the area.