During licence year 6, the commencing year of renewed EL 3895 Cutana, no work took place because Havilah's RC drilling rig, along with all company personnel, were fully occupied on completing the mining feasibility evaluation drilling programmes...
During licence year 6, the commencing year of renewed EL 3895 Cutana, no work took place because Havilah's RC drilling rig, along with all company personnel, were fully occupied on completing the mining feasibility evaluation drilling programmes required at the Kalkaroo and Mutooroo deposits, so again the planned exploratory drilling along strike from Radium Hill was postponed. In order to rectify this performance shortcoming, earlier in 2008 a joint venture agreement was signed with Canopus Resources Limited, a company who Havilah believed possessed sufficient personnel and resources to both meet the past accumulated and ongoing expenditure commitments, and would comprehensively explore the tenement in the coming year. But no work could be carried out immediately by Canopus Resources, pending stamping of the agreement by Revenue SA and then receipt of written ministerial approval, the latter occurring at the end of the annual reporting period. During licence Year 7, Havilah undertook a surface soils radon gas emanometry geochemical survey to better define areas of buried anomalous uranium as drill targets. In July 2009, 675 readings were taken in a location approximately 2.5 km south of the Radium Hill mine, over a broad southwards flowing contemporary drainage system. The radon readings were made at 25 m intervals along E-W lines spaced 50 m apart, using an electrostatic method of detection. Some localised coherent anomalism in radon flux was observed, coincident with the current active stream channel, while some patchier anomalism was seen along the eastern margin of the survey area. During licence Year 8, Havilah undertook an RC drill program targeting stratiform iron ore within Adelaidean metasediments, consisting of 15 northwards inclined holes drilled along three north-south traverses, for a total penetration of 1116 m. The holes were spaced 25-50 m apart, and were drilled to depths ranging from 57 m to 118 m. Their concealed target was a prominent, generally east-west striking, magnetic feature interpreted (from available airborne magnetic data) to represent the Sturtian Braemar Iron Formation. While drilling was in progress, 1-metre bulk RC drill cuttings samples (weight 10-20 kgs) were collected in large plastic bags under a cyclone, which was cleaned at the end of each run of 6 metre-long drill rod to minimise contamination. The bulk samples were then scanned with a portable Niton XRF spectroscopic analyser to gauge their approximate average iron content. 308 composite 3-metre depth interval samples were submitted for laboratory multi-element assaying, also by XRF spectrometry. Selected drillhole sample depth intervals having high magnetic susceptibility were also sampled for Davis Tube Recovery (DTR) analysis to determine recoverable magnetite concentrations at a range of grind sizes. The DTR samples were composited generally over 5-metre intervals using subsamples collected from riffle split 1-metre samples. A total of nine such composite samples were submitted for DTR analysis. Most of the holes made broad intercepts of moderate grade iron ore, including 83 m @ 36.5% Fe and 32 m @ 42.4% Fe encountered in hole CTRC015. The magnetite-bearing sediments of the Braemar Iron Formation vary from massive, weakly bedded ironstones, to magnetite siltstones, to magnetite-bearing tillites with coarse erratics. The depth to base of magnetite weathering/oxidation (based on magnetic susceptibility readings taken from all of the drill cuttings at 50 cm intervals) ranges from 15 to 50 m, and loosely parallels the geologically logged oxidation and weathering profiles. Examinations made of outcrops of surrounding sediments suggested that the buried Braemar strata were likely to dip steeply southwards, while the subsequent close-spaced RC drilling done on two of the traverses indicated a shallower dip of 30º to the south. To assist with the planned imminent conduct of mining prefeasibility studies, these initial drillholes will be followed up with additional ones designed to gather data to allow definition of a JORC-compliant indicated iron ore resource. During licence Year 9, Havilah continued exploratory RC drilling of the Adelaidean bedrock in the south of EL 3895, again targeting the Neoproterozoic Braemar Iron Formation. A total of 53 inclined holes (CTRC016 - 068) for 5617 m were completed. At the start of the latest campaign, the drill hole sitings were designed to follow up promising mineralised intercepts obtained on several traverse lines from the previous year. Once it became evident that a significant body of iron ore was present, the drillholes were stepped out in three directions in order to define the limits of the shallow ore and the geometry of the deposit, which emerged as a large shallow flat slab of iron ore. Holes spacing ranged from 40-125 m, with hole depths ranging from 36 m to 162 m. Downhole sampling methods were as described already. Appreciable thicknesses of Braemar Iron Formation were intersected in most drillholes during the latest campaign, frequently with little overburden or waste present. A geological model was developed for the Maldorky iron ore occurrence based on its drilling data, which formed the basis for an initial JORC resource estimate made using Vulcan 3D software, of an Indicated Mineral Resource of 147 Mt @ 30.1% Fe at a cut-off grade of 18% Fe. During licence Year 10, Havilah undertook RC drilling to explore for copper mineralisation at the Wilkins prospect. 17 inclined holes (WKRC001 - 017) for 2284 m drilled over the period June to August 2012 explored a known granite-hosted mineralised quartz-magnetite vein system which had been identified there by MIM Exploration in 1996, when that company was following up regional copper soil anomalies. The latest drilling confirmed features of part of the vein system that contains a copper-mineralised zone dipping approximately 70° towards the north and striking at 070° True, but further drilling is required to understand the extent of this mineral occurrence, and how it relates to several nearby linear magnetic anomalies. Hole WKRC03 produced the highest grade intercept of 149 m @ 0.37% Cu + 0.245 g/t Au. The copper is found as a primary sulphide in the form of chalcopyrite, which is intimately associated with magnetite, so the veins' copper content is greatest where the iron content increases. In other concurrent work, diamond drilling was undertaken at the Maldorky iron ore deposit and surrounding prospect to acquire samples for metallurgical testing, and to gain structural information. 4 angled HQ3 cored holes (CTDD001 - 004) for 453.8 m were completed during September 2011. Niton XRF readings of iron content and potential ore contaminant species, made using a Niton XL2 unit, were carried out on all 1 m bulk samples. Three x 15 second readings were collected and then averaged for each sample. Downhole core orientation surveying was carried out using a Camteq Multishot digital survey camera, with readings collected every 30 m. Drill core magnetic susceptibility readings were collected every metre using a KT-9 unit. During licence Year 11, on renewed EL 5179, Havilah undertook an RC drilling program targeting Neoproterozoic sediment hosted stratiform iron ore at the Grants Prospect in the east of the tenement. A total of 17 RC holes (GTRC020, GTRC025-039, GTRC041) for 1525 m, drilling was completed in conjunction with drilling on neighbouring EL 4200 [ENV11045 CNO:2039483]. The Grants target is a prominent, generally east-west striking, magnetic feature interpreted to represent the Braemar Iron Formation, with the drilling program designed to test the depth and grade of lateritic caps situated across 3 different hills. The drilling showed that the lateritic caps are 5-8 m deep and generally sit on top of Braemar Formation ironstone and appeared to define the geometry of the mineralisation to be a possible synclinal trough shape with beds dipping inwards at approximately 45 degrees. Drill chips were analysed at the time of drilling via the Niton Portable XRF, with intervals of interest resampled as 3 m composite samples for laboratory fusion/XRF analysis (397 samples submitted for analysis). In the 2017 reporting year, Havilah progressed the feasibility study for the Maldorky Iron deposit on EL 6041. A desktop review of historical data for the Mutooroo Project Area was undertaken. Four tenements proximal to the Mutooroo Project Area were purchased from Minotaur Operations Pty Ltd (Minotaur) on 09 February 2017, EL5437 (Woodville Dam), EL5502 (Collins Tank), EL5831 (Bonython Hill) and EL5848 (Mingary), were officially transferred to Havilah Resources Limited on 7th June 2017. The amalgamated tenements are now referred to as the “Curnamona South Project”. In the 2018 reporting year Havilah completed extensive compilation of open file data and undertook surface sampling across the Mutooroo Project area. SIMEC Mining commenced due diligence on Havilah’s iron ore assets: Maldorky and Grants Iron Ore Resource, and the Grants Basin Prospect, with a drilling program completed at the Grants Basin Prospect and Maldorky Resources. The compilation of Open File Data saw 12,153 soil, rock, auger soil and steam sediment samples collated across the Mutooroo Cu-Co project area. The need to validate the results obtained with ground truthing and to see if the elevated ironstone results were due to mineralisation or the result Fe/Mn scavenging led to the development of a regional sampling program. Reconnaissance orientation soil and lag sampling at two known locations of Mutooroo Style mineralisation indicated that soil was windblown, and that ironstone lag would be the most effective tool. A regional ironstone lag sampling program was undertaken along 5 km traverse, at 250 m to 1 km line spacing with samples taken every 100 m from a 50 m radius when ironstone was present. A total of 140 line-km was covered, and 568 samples collected. Surface sampling delineated 7 new prospect areas with highly anomalous Cu-Co. Rock chip sampling (4) was undertaken at the Scorpion and King Brown Prospects utilising surface workings and gossans. Following a successful surface sampling program, select drill core was re-assayed from 5 diamond holes from the Inferred section of the Mutooroo Resource. At Grants Basin Prospect, 13 RC holes for a total of 3510.2 m were drilled to test the iron bearing potential of the basin. Drilling intersected significant Braemar Iron Formation in 12 of 13 drillholes. Following results of RC drilling, 2 diamond holes totalling 280 m at Maldorky and 1 hole for a total depth of 624.4 m at Grants Basin were drilled to provide samples for metallurgical test work. Test work is currently ongoing. Drilling to date has been successful in proving the concept of a substantial Iron deposit in the Grants Basin.