GEMIS Collection: Exploration reports submitted under mineral titles legislationExploration reports submitted under mineral titles legislationhttps://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/32024-03-29T15:37:45Z2024-03-29T15:37:45ZRound 15 Resourcing the Territory Initiative Boco North RC Greenfields Drilling - Prodigy Gold EL 31331 Final ReportKeys, EFerris, Ghttps://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/928462024-02-04T23:37:30Z2023-01-01T00:00:00ZTitle: Round 15 Resourcing the Territory Initiative Boco North RC Greenfields Drilling - Prodigy Gold EL 31331 Final Report
Author: Keys, E; Ferris, G
Abstract: The Boco North drilling program was designed at opening an unexplored greenfields area along the significantly mineralised Supplejack Shear Zone ('SSZ'). Boco North has not been effectively drill tested historically and is a geochemically blind target due to the presence of the unmineralised Proterozoic Supplejack Downs Sandstone cover unit (outcropping at surface). The Boco North project area is located to the north, and along strike, of the Hyperion Deposit (310,000 ounce resource @ 1.95 g/t, 100% PRX) and the Tregony deposit (54,000 ounce resource @ 1.16g/t Au, 100% PRX). The Crusade deposit (~100,000 ounce resource, 50% Northern Star and Tanami Gold) is located immediately to the north of the Boco North area, making this Boco North area (~50sq km's) a prime exploration target between significant and defined mineral resources. The drill targets observed in magnetic imagery were drill tested in the Round 15 Resourcing the Territory initiative with the aim to better understand the stratigraphic relationship between the prospective Paleoproterozoic Tanami group and the un-mineralised younger and less deformed Proterozoic cover. The aim of this drilling program was to determine the depth of cover and confirm the presence of the prospective Tanami group (Paleoproterozoic) below the younger cover unit(s). Hole depths were planned for 150m (at -60-degree dip), after geophysical consultation providing insight into the likelihood of shallow (<150m) of cover thickness; basement magnetic features did not have a 'muted' texture that would indicate significant cover thickness. Due to the unexpectedly thick cover depth of the encountered/interpreted Proterozoic (or younger) units, a planned program consisting of 20 holes with a planned depth of 150m each, totalling 3000m, had to be revised. Only 9 holes were drilled, totalling 1645m. It was discovered that the cover units were considerably thick at Boco North. Consequently, it is now believed that cost-effective exploration for bedrock (Paleoproterozoic) would require drilling to depths that exceed feasibility. Selected drill hole samples were submitted to North Australia Laboratories Pty Ltd at Pine creek for geochemical analyses for gold only via fire assay. Typically, sample selection was based on the depth of the hole, with the weathered portion of the upper sections omitted from analyses. Four-metre composite samples were taken for most of the sampling, while single metre samples were selected by the rig Geologist where significant veining was observed. 59 element four-acid digest ICP-MS and ICP-OES analysis may be performed (in the future) on selected intervals to continue to build the geochemical profile of the Supplejack Sandstone. Low-level gold was detected in hole BCRC23010 with a 1m sample reporting 0.14g/t Au (130-131m) and a 4-metre sample reporting 0.11g/t Au (132-136m). Whilst not economically significant, detectable gold in the Supplejack Sandstone has not been previously reported. Reverse circulation (RC) drilling during this 2023 program has provided fresh rock data where none has been obtained previously. The Proterozoic iron-rich sandstones are significantly thicker than anticipated (at least 300m thick) and provide evidence for a possible (and significant) structure existing between Boco North and Boco (~2.5km to the south) that would explain the disappearance of the sedimentary basin over this distance. Possible horst/graben displacement could explain the disappearance of >300m of Paleoproterozoic Birrindudu basin sediments over the ~2.5km distance from this round of drilling to the historically drilled holes to the south, where significant mineralisation in the Tanami Group was observed at a depth of ~50m from surface.2023-01-01T00:00:00ZEL 32285 and EL 32286 Ground Gravity and Passive Seismic Survey (Ranken Project South Nicholson Basin, NT - Geophysics and Drilling Collaboration Program Round 15 (2022)https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/928452024-02-04T23:35:41Z2023-01-01T00:00:00ZTitle: EL 32285 and EL 32286 Ground Gravity and Passive Seismic Survey (Ranken Project South Nicholson Basin, NT - Geophysics and Drilling Collaboration Program Round 15 (2022)
Abstract: Knox Resources Pty Ltd (Knox or the Company) was a successful applicant and awarded a cofunding grant under the Northern Territory (NT) Government's Round 15 Geophysics and Drilling Collaborations (GDC) program. The co-funding grant was applicable to Exploration Licences (EL) 32285 and 32286 within the South Nicholson Basin of the NT to acquire a ground-gravity survey. The survey was based on a spacing grid of 1 km x 1 km station spacing to complement the existing datasets along with a passive seismic horizontal to vertical spectral ratio (HVSR) survey totalling 220 km at station intervals of 400 m. Knox's Ranken Project encompasses two exploration permits (EL 32285 and EL 32286) that lie approximately 320 km east of Tennant Creek in the NT. Unlike the East Tennant Project, the Ranken Project is hosted within the central west of the Mesoproterozoic South Nicholson Basin. This region is largely obscured by younger Cambrian Georgina Basin and Cenozoic cover sequences and has therefore undergone only very limited mineral exploration activities including any drill hole data. Knox's exploration targeting has interpreted that the Ranken Project is host to McNamara Group sequences below shallow (<300 m) Georgina Basin sediments. Both Isa style copper and sedimentary hosted style deposits are hosted within several stratigraphic levels of the McNamara Group and Isa Superbasin equivalents highlighting the Project area is a prospective base metal target area. The original survey was proposed for August 2022. However, the survey was delayed due to corporate transactions involving the sale of assets from Greenvale Mining NL to Astro Resources. Further significant delays were encountered in early 2023 due to heavy rainfall resulting in flooding in the Ranken Project area and preventing the crews from accessing the site. Atlas Geophysics Pty Ltd (Atlas) undertook the ground-based gravity survey over EL 32285 and EL 32286 from 20 May 2023 to 7 June 2023 using utility terrain vehicles (UTVs). A total of 1,047 new gravity stations were acquired using 1 km x 1 km grid configurations. Field data were processed and modelled by Resource Potentials Pty Ltd (Resource Potentials) in Perth, with the geological interpretation undertaken by SRK Consulting (Australasia) Pty Ltd (SRK). The passive seismic HVSR program was acquired by Atlas between 21 May and 8 June 2023 using Tromino seismometers. A total of 282 passive seismic HVSR recording stations were acquired using a nominal station spacing of 400 m with nine survey lines of variable length and orientations collected. The data were acquired using a 20-minute recording period and a sampling frequency of 128 Hz. Resource Potentials conducted quality assurance and quality control (QA/QC), data processing and preliminary data interpretations. The acquisition of the detailed gravity and passive seismic over EL 32285 and EL 32286 has greatly added to the NT regional gravity datasets, with the work already completed from these datasets further highlighting the greenfields prospectivity of the South Nicholson Basin. The new data will provide a better understanding of important structural corridors, distribution and architecture of prospective geological horizons and potential fluid sources and has provided greater confidence for proposing a stratigraphic hole, Ranken-01, within the permit area. Knox is currently evaluating the new geological and geophysical data to position the stratigraphic hole in an optimal location.2023-01-01T00:00:00ZGeophysics and Drilling Collaboration Final Report for High Definition Magnetic and Elevation Survey (Drone Survey) in the Northern Project Area, Tennant Creek Mineral Field - Lone Star to Billy Boy Area Northern Star to Whippet Area Golden Slipper AreaCuison, Ahttps://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/928372023-12-10T22:08:43Z2023-01-01T00:00:00ZTitle: Geophysics and Drilling Collaboration Final Report for High Definition Magnetic and Elevation Survey (Drone Survey) in the Northern Project Area, Tennant Creek Mineral Field - Lone Star to Billy Boy Area Northern Star to Whippet Area Golden Slipper Area
Author: Cuison, A
Abstract: This report provides a summary of the High Definition Magnetic and Elevation Survey (Drone Survey) completed in May 2023 by Emmerson Resources (ERM) and Joint Venture (JV) partner Tennant Consolidated Mining Group Pty Ltd (TCMG) - Tennant Mining on selected areas on the Northern Project Area (NPA) in the Tennant Creek Mineral Field (TCMF). TCMG is a private entity focused on mining and processing in the Tennant Creek Area. The survey was partially funded by the Northern Territory (NT) Government administered by NT Geological Survey under the Resourcing the Territory initiative and the Geophysics and Drilling Collaborations Program (Round 15 2022/23). The TCMF is centered in the town of Tennant Creek, approximately 500km north of Alice Springs. The field was discovered in 1925 and mining until 2005 has produced approximately 157 t of gold, 345,000 t of copper, 14,000 t of bismuth, 220 t of selenium and 56 t of silver from 130 mines with majority of this production being derived from 12 deposits (Donnellan 2013). The increasing scarcity of large near-surface deposits has created demand for new and more sophisticated deep exploration techniques, i.e., 2D/3D seismic surveys and 3D M.I.M. Distributed Acquisition System (MIMDAS) survey. Recent use of unmanned aerial vehicle (UAV)-based geophysical surveys (Drone survey) for land mineral exploration are opening extraordinary opportunities in providing high-resolution definition of geologic structures, subsurface mapping and for direct targeting of mineral deposits. In 2021, Emmerson Resources Ltd completed an ultra-high resolution drone magnetics for the first time in the TCMF flown by Airborne Geo Exploration Pty Ltd (AirGeoX). Four (4) areas have been flown in the southern area: a) Chariot to TC8 Corridor (Wineline), b) Eldorado to Comstock Corridor (Nobline), c) Peko to Golden Forty Corridor, and d) Mauretania. Preliminary results and comparison with the new data of the ultra-high resolution drone magnetics versus the 1984 Aeromag flown by Aerodata have shown that the data acquired from the drone survey represent the highest quality/highest resolution magnetic data ever acquired at the TCMF in the last 90 years. Noting that the lines spacing from the drone survey is 10m and 20m, with sensor height of 15m/25m. The drone magnetic survey is highly successful 'proof of concept' in delineating the Mauretania deposit. This recent result has expanded the development and exploitation of new exploration search space and will possibly lead to a new wave of discovery in the TCMF. From the success of the first drone survey in TCMF south, the following areas were flown in the northern area: 1) Lone Star to Billy Boy, including Explorer 195 (Exp 195); 2) Northern Star to Troy and Edna Beryl to Whippet; and 3) Golden Slipper to Queen of Sheba. These sites host gold plus-minus copper mineralisation in hematite dominant ironstones. The aims of the ultra-high-resolution survey are to: a) provide high-resolution definition of geologic structures and subsurface mapping, and to be able to rapidly identify/define more accurately the subtle structures controlling the mineralization (D3/D4 structures); b) identify extent of known mineralization; c) identify/delineate small-scale magnetic features that may arise from the variation in distribution of magnetite versus hematite within both barren and mineralised ironstone occurrences; d) provide focused drill targeting of potential mineral deposits. The result from the proposed drone magnetic survey will greatly improve the targeting of Emmerson and JV partner TCMG in looking for shallow high-grade gold that can be easy to develop in the TCMF. Emmerson engaged AirGeoX to conduct the aerial drone survey. Acquisition of the data has been designed using 20m traverse line spacing, with 200m tie line spacing and a nominal flying height of 20m, with a total line kilometer of 10,454.74 completed.2023-01-01T00:00:00ZEast Tennant IOCG Greenfield Diamond Drilling on EL 32297 Final Report - Geophysics and Drilling Collaboration Program Round 15 (2022)https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/928362023-12-10T22:08:10Z2023-01-01T00:00:00ZTitle: East Tennant IOCG Greenfield Diamond Drilling on EL 32297 Final Report - Geophysics and Drilling Collaboration Program Round 15 (2022)
Abstract: The object of the program was to discover an Iron Oxide Copper Gold (IOCG) style orebody by testing aeromagnetic, gravity, IP and surface expressions of copper mineralisation at the Crosswinds Project. A staged drill program of a total 14 drill holes (approximately 10,000m) and possibly up to 28 holes was planned to test different parts of the interpreted IOCG target. An initial four RC/DD holes were drilled as part of the program. Drilling was completed from the 26th June to the 30th July 2022. Two holes were drilled with help from the NT Geophysics and Drilling Collaboration Program (GDCP). Core from the two co-funded holes CWDD001 (808.62m) and CWDD004 (811.00m) was submitted to Alice Springs core storage facility. The additional planned drill holes were postponed due to a combination of drilling delays and a need to evaluate the results from the initial holes as no material mineralisation was recorded, and as intersected lithologies may account for the magnetic and gravity anomalies targeted. Hematite rich alteration consistent with the ICOG target concept was however intersected in the basement rocks.2023-01-01T00:00:00Z