Round 10 Geophysics and drilling collaborations final report

Abstract

EL 31531 and EL 27581 are contiguous licenses granted in March 2017 and cover 779 and 514 square km respectively . Both licenses are 100% owned by Gempart (NT) Pty Ltd. EL 31531 is located 30 km east of the town of Docker River and EL 27581 commences 6km east of the WA border. The objective of the current work was to fly simultaneous regional AEM VTEM and magnetic surveys over a large part of EL 31531 and part of EL 27581. No historical AEM surveying had ever been carried out in the area and historical regional magnetic surveying had been carried out in the mid 1980's. New coincident magnetic, AEM and digital terrain survey data was successfully collected over the planned survey area. The survey used wide spaced flight lines 500 meters apart flown with a north-south orientation. The resulting data were of good quality and some representations of these data are presented in this report. Magnetic data flight lines were flown to interleave historical NTGS magnetic survey lines so as to give a higher resolution coverage over the area (250 meter spacing). Subsequent research and development will be put into merging new magnetic data with historical NTGS magnetic data to obtain greater resolution to assist with further interpretation. AEM data were successful in delineating several features of interest. Depth transformation data was able to delineate structures on the eastern and north-western parts of the survey area for follow up. There was a good correlation between Bloods Range Beds geology and conductivity structure observed in conductivity transformation data central to the survey area. Conductivities and time decays observed for the survey area were considered moderate. Some AEM structure was possibly inconsistent with structural orientations observed in magnetics. Follow up surveying for mineral exploration may test some structures using east-west lines and possibly IP surveying for disseminated mineralisation, or gravity surveying.