Tipperary area, partial relinquishment report for ELs 6649, 6650, 7380, 7381, 7382 and final report for ELs 6647, 6648, 6652, for the period ending 21-06-93

Abstract

The first phase of exploration on the relinquished areas essentially involved the collection of 195 heavy mineral stream sediment samples. Geochemical samples were collected at each heavy mineral site. The heavy mineral results were largely disappointing. Although numerous chromites were recovered, only 2 were considered anomalous together with one diamond (0.0027cts). The geochemical results indicated that 5 areas were worthy to follow up as they gave maximum values of 15ppb Au, 158ppm Cu and 47ppm Pb. NTDME magnetic data was also re-interpreted and one anomaly chosen for further work in the relinquished area. This anomaly was followed up with ground magnetics, giving a small discrete dipole feature. The porphyritic granite found outcropping did not explain the anomaly, and it was decided to be followed up in the second year of tenure. The second phase of exploration involved the follow up of the anomalous heavy mineral results with the collection of 117 heavy mineral samples, and the follow up of the geochemically anomalous zones with the collection of 260 geochemical samples (stream, BLEG and rock chip). The geochemical results produced anomalous values only in the Mistake Creek area (130ppm As and 9.89ppb Au), where the gold is believed to have derived from small quartz dykes in the Burrell Creek Formation. The samples collected in the other areas reflected background levels. The magnetic anomaly was followed up by 2 RAB drill holes, which intersected a highly magnetic damp metamorphic pod at 8m. An aerial magnetic survey was flown, which partially covered the reporting area. One anomaly was chosen in the relinquished areas, which was also checked for coincident TM anomalies. As a result one magnetic and 2 TM anomalies were followed up by heavy mineral sampling. The heavy mineral follow up of the diamond, chromites, drill chips and geophysical anomalies produced negative results. No further kimberlitic indicators or diamonds were recovered. The reporting area has little potential to host a primary diamond, gold, or base metal accurence of economic size.