Completion report NTGS Geophysics and Drilling Collaborations Program Tin Camp Creek Project EL 24921

Abstract

A Heli-SAM survey was conducted over the Tin Camp Creek project area and is documented in the separate NTGS Geophysics and Drilling Collaborations Program 2014 completion report. This report documents the follow up drilling that was conducted to test MMR and TFEM anomalies under sandstone and dolerite cover rocks. The anomalies are otherwise blind targets. The drilling provided a test of the SAM/MMR methodology as applied to target resistance variance within basement rocks in the region and also to assess the effectiveness of the TFEM data, which Alligator considers to be a largely untested method. Following processing of this data, it became apparent that the traditional MMR results were potentially highlighting broader areas of lesser resistivity units within the basement stratigraphy. Further processing of the TFEM or 'off time' data produced theoretically deeper seated conductive units within the basement stratigraphy. This is effectively an electromagnetic processing technique and it is understood that Alligator is one of the first companies to pursue this as a potential method to highlight basement variations in conductivity. Two anomalies were highlighted for initial follow up drill testing utilising reverse circulation pre collars and diamond tails. These anomalies were located at the 'Orion South' and 'Mintaka North' prospects. Two drill holes were completed in each prospect for a total of four drill holes for 1097 metres of which 690 metres were reverse circulation and 407 were diamond core. Drilling at Mintaka has successfully identified the probable cause for the late time response as observed within the late time TFEM data. This appears to be associated with disseminated sulphides within the Cahill formation which had been previously missed in traditional magnetic, electromagnetic and gravity surveys. The sharp contrast in the low and high resistivity seen in the MMR was not explained from this drilling however may relate to chlorite within the dolerite itself. The drilling at the Orion South project has failed to conclusively explain the MMR response and subtle TFEM features. The increase in micaceous schists as you move into the anomaly could indicate a subtle change in lithology from arkoses to schist packages, which could give a lower resistivity and potentially a broad signature. Follow up drilling in 2015 is proposed to advance further North West if possible to test this. This could potentially be extremely important in being able to delineate the lower Cahill sequence undercover moving forward. Other RC drilling at the North East Myra / North Orion prospects in the 2014 repeatedly demonstrated the correlation between chlorite alteration and peak MMR responses. Alligator believes the SAM technique has potential to be implemented further as a regional sub cover exploration tool, and is currently looking at variations on the technology to help refine stratigraphy, structure and alteration further.