Exploration Licence 5017 Arkaroola, Exploration Licence 5118 Mt Yerila and Exploration Licence 5261 Petermorra cover a combined area of approximately 1831 square km within the northern Flinders Ranges and the Frome Basin. The area is being...
Exploration Licence 5017 Arkaroola, Exploration Licence 5118 Mt Yerila and Exploration Licence 5261 Petermorra cover a combined area of approximately 1831 square km within the northern Flinders Ranges and the Frome Basin. The area is being targeted for sedimentary hosted uranium. During the first year of joint reporting the company undertook to drill 7 vertical rotary mud/diamond cored holes drilled on EL 5017 for a total penetration of 1882.3 m to test the basal Eyre Formation and Four Mile Diamictite along the Paralana Fault zone and to obtain drill core samples of mineralised intervals for petrological/mineralogical and geochemical analysis. Another 8, rotary mud only holes for 1004 m drilled on EL 5118. Ground gravity, CSAMT and passive seismic geophysical surveys were completed within EL 5017 (Arkaroola) as part of a broader geophysical program to determine the geometry and trace of the Paralana Fault and to evaluate the effectiveness of geophysical techniques, in particular passive seismic, to define thicknesses of prospective stratigraphy, depth to basement, palaeochannels and local to regional faulting. A total of 1659 ground gravity stations at 50 m x 100 m station spacing were collected as part of a broader survey to accurately map the geometry and surface trace of the Paralana Fault and other structures. Ground gravity data were collected by Daishsat Geodetic Surveyors. Approximately 22.2 line km of CSAMT (Controlled Source Audio MagnetoTelluric) data was collected as part of a broader survey to accurately map the geometry and surface trace of the Paralana Fault. CSAMT data was collected by Zonge Engineering and Research Organisation. During the second year of joint reporting Heathgate undertook rotary mud drilling of 9 holes for 2260.8 m, 2 (FLC003 & FLM003) of which had diamond core tails for 46.1 m on EL 5916 Arkaroola. The holes were completed to test for commercial level mineralisation within the Paralana Fault and adjacent sedimentary host formations. Generally, no mineralisation was encountered during drilling operations, with the exception of 7 m of mineralisation identified in FMC011. Mineralisation within this hole was reported within the Diamictite. The mineralisation style is a roll front, comprising part of the larger Four Mile West deposit. It is expected that diamond drilling is to be completed on all remaining holes in the next reporting period. No exploration activities were carried out on EL 6033 and EL 5261 during the reporting period. During the third year of joint reporting to 31st December 2018, exploration activities undertaken included a drilling program with the focus being to target mineralisation hosted within either the blanket sands of the Eyre Formation or palaeochannel sediments hosted within the Namba Formation, and to define the redox boundary between the ranges and the basin, with all holes planned to intersect basement. During the reporting period a total of 14 rotary mud drillholes and 4 diamond tails (249 m) were drilled for 4,132 m. Drill holes were split between 3 locations; Rangefront, Four Mile West and Four Mile South - aimed to test basement and sedimentary lithologies for uranium mineralisation within prospective stratigraphic units and to obtain samples where required for geochemical purposes. All drilling was completed on EL 5916 Arkaroola. No exploration activities were completed on EL 6033 Mt Yerila and EL 6244 Petermorra during the reporting period. Desktop studies were undertaken on EL 5916 to further the understanding of the structural and stratigraphic composition of the eastern Frome Basin. Heathgate engaged Mire Geoscience to run an integrated modelling and interpretation pilot program, utilising historical magnetic and gravity data, and interpretations from legacy drilling, seismic and airborne electromagnetic data [see included reports].
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