Data release - as updated : One Tree Hill (part of the Manna Hill Project). Annual reports and final report to licence expiry/full surrender, for the period 5/11/2007 to 4/11/2017.
Published: 15 Dec 1917 Created: 12 Nov 2024 Revised: 12 Nov 2024

Exploration for possible economic vein-style and structurally controlled gold with Adelaidean bedrock sediments in an area located between the towns of Yunta and Manna Hill was conducted using low cost remote sensing, geochemical and geophysical...

Exploration for possible economic vein-style and structurally controlled gold with Adelaidean bedrock sediments in an area located between the towns of Yunta and Manna Hill was conducted using low cost remote sensing, geochemical and geophysical methods. The subject licence was applied for to allow exploration for buried high grade gold mineralisation that might possibly have formed within stratigraphic and structural positions akin to those seen at the historic Manna Hill Goldfield. It was also intended to follow-up a cluster of still untested base metal geochemical anomalies previously identified by CRA Exploration as being associated with shallowly buried Umberatana Group bedrock metasediments. During the first licence year, a compilation and preliminary interpretation of available airborne geophysical survey data was commissioned from Hawke Geophysics. An attempt was made to map fault sets in the basement, but it was hampered by virtue of the existing wide magnetic grid. Because strong fault control is associated with copper deposits elsewhere in the Adelaide Geosyncline, the collection of detailed airborne magnetic and radiometric data was recommended to assist with the mapping of stratigraphy and potentially prospective structures. New on-ground field work consisted of geological mapping, rock chip sampling, and soil geochemical sampling and analysis done through the use of portable XRF spectrochemical scanning instruments, with the aim of identifying any signs of Telfer style copper-gold mineralisation. 527 soil samples from sites spaced 100 m apart were scanned, with some sampling infill to 50 m spacing to better resolve anomalies. During the second licence year, Earthscan was contracted to obtain and interpret satellite imagery covering EL 3973, to try to detect evidence of hydrothermal alteration that is associated with faults or stratigraphic unit boundaries. As well, 745 additional FPXRF soil scans were performed at 100 m intervals along traverses spaced 400 m apart. During the third licence year, Panda Mining acquired 8834.5 line km of new aeromagnetic / radiometric / DTM coverage across the Manna Hill Project acreage during April 2010, which GPX Surveys flew along north-south lines spaced 140 m apart, using a mean sensor height of 45 m above the ground surface. The resulting data were interpreted for Panda Mining by Southern Geoscience Consultants. New on-ground work comprised follow-up of the previous soil geochemical sample and rock chip sample anomalies, geological investigations of features of possible interest identified by the recent LandSat image and airborne geophysical survey data interpretations, plus making an evaluation of the gold prospectivity of the historic Cockscomb Hill copper workings located on the southern flank of the Winnininnie Dome. Here the licensee's grab sampling of rock chips had returned up to 46 g/t Au, but more generally around 1-2 g/t, from stacked, gossanous quartz/haematite/limonite (after siderite) veins spread disjointedly along ~2.2 km of fault-offset interbedded shale/siltstone units. Geological mapping was done by Martin Spence at 1:5000 scale along north-south traverses 100 m apart, which identified a thrust fault above the mineralised zone and later dilatant, conjugate wrench faults that seem to have caused multiple phases of veining and locally intense alteration. It was concluded that a more detailed evaluation of extent of this gold occurrence was needed, that should include step-out surface geochemical sampling towards the north and west attended by further detailed geological mapping, plus trenching and channel sampling of the more significant veins. It was also surmised by Panda Mining that the prospect area was formerly covered with a Tertiary laterite horizon that has been stripped during subsequent uplift of the present day range. Therefore the probability was that today’s oxide horizon is partially depleted in a number of elements including gold. Consequently it was suggested that drilling should be undertaken to test within and below the oxidised horizon. No work was performed on EL 3973 during the fourth licence year. During the fifth licence year, work commenced on the Big Dam prospect located near Yunta, where 98 rock chip grab samples for gold assay were collected along north-south traverses from gossanous quartz veins, a gossan with visible copper minerals, ironstone veins and altered country rock. Here the sheeted quartz veins extend for >700 m strike length. They were worked historically on a small scale for gold, silver and copper as the Winnininnie occurrence, but the grades found and quantities mined are unknown. During the sixth licence year, Panda Mining resumed doing FPXRF soil geochemical scans over some geophysical anomalies on the recently renewed EL 5189. 434 such scans were made at 50 m intervals along traverse lines spaced 100 apart. 11 rock chip samples were also collected from various locations to the west of Cockscomb Hill. Two Work Area Clearances were obtained from representatives of local Native Title groups to allow access for the conduct of ground disturbing activities in this part of the licence area. A re-assessment of the XRF geochemical results was undertaken to see whether a recognised gold mineralising event (Telfer style or other) had taken place. The data coverage is partly incomplete, but taken together with the recorded historically worked grades, Panda Mining decided that there was enough justification to continue with exploration on this EL. The majority of gold mineralisation within EL 5189 appeared to be of epigenetic origin. These deposits were thought to have formed as veins of quartz-sulphide, with the gold primarily associated with the sulphide phase. As areas of outcrop of the mineralised vein systems had been systematically explored by past workers without the identification of a significant tonnage resource, it was recommended that future work be aimed at targeting the potential for concealed mineralisation in areas of shallow alluvial cover. In the near future, exploration would be based along interpreted structural trends which were believed to control epigenetic Au-Pb-Ag mineralisation at locations like the Boomerang and Golden Dewdrop mining areas. Minor, discontinuous magnetic anomalies along these trends were seen as possible direct indicators of the sulphide rich quartz veins, with pyrrhotite considered the most likely source of the anomalies. During licence Year 7, further field geological mapping and rock chip sampling (59 samples collected) were performed. Following receipt of the outcrop chip assay results, portable XRF spectrochemical scans were made as infill to previous FPXRF sampling, using a 50 m sample spacing (455 sites scanned). A single inclined RC exploratory hole was completed to 300 m hole depth at the Cockscomb Hill prospect during October 2014, to test the possible geological models proposed by Martin Spence. Hole CCB001 was collared within the antiform structure in the Ulupa Siltstone, and was drilled north-northwestwards at 60 degrees inclination through the Seacliff Sandstone, Ketchowla Siltstone and only 4-5 m of the Grampus Quartzite. No significant mineralisation was encountered. No further work was done on the tenement over the succeeding 35+ months before the decision was made to fully surrender tenure.

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About this record

Record No mesac26531
Topic Geoscientific Information
Type of Resource Document
Category Type
Document Type Mineral Company Report - Mineral Exploration
Contributor Hawke Geophysics Pty Ltd;Earthscan Pty Ltd;GPX Surveys Pty Ltd;Southern Geoscience Consultants
Sponsor Millridge Holdings Pty Ltd;Panda Mining Pty Ltd
Tenement
Tenement Holder Millridge Holdings Pty Ltd;Panda Mining Pty Ltd
Operator Millridge Holdings Pty Ltd;Panda Mining Pty Ltd
Geological Province
Mine Name Windy Hill barite deposit;Cockscomb Hill mine prospect;Big Dam prospect
Stratigraphy
Commodity
Notes
Notes: This release to the public of the subject mineral exploration data, namely, company data which was acquired more than 5 years ago, is being done by DMITRE in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88...

Notes: This release to the public of the subject mineral exploration data, namely, company data which was acquired more than 5 years ago, is being done by DMITRE in accord with the provisions of Section 77D of the Mining Act 1971 and Regulation 88 of the Mining Regulations 2011. Ownership of the subject licence was transferred to Panda Mining by Millridge Holdings in November 2009. Includes: - Hawke, P., 14/12/2008. Memorandum re. review of open file geophysical data in EL 3973 (Hawke Geophysics consultant's report for Redmile Resources). Appx 1 of EL 3973 first annual report to 4/11/2008. 6 pages, 5 fig; - Wilson, P., January 2010. Mineral interpretation from Landsat ETM+7 satellite data and Quickbird satellite data [relating to] EL 3973, South Australia (Earthscan Pty Ltd consultant's report for Panda Mining). Appx 2 of EL 3739 second annual report to 4/11/2009. 40 pages, 2 appx, figures, plates, tables; - Isles, D., 28/7/2010. Memorandum re. interpretation and targeting [from data obtained by the recent] Manna Hill district airborne magnetic and radiometric survey (Southern Geoscience Consultants report for Panda Mining). Appx 2 of EL 3973 third annual report to 4/11/2010. 15 pages, figures, 1 table; - Spence, M., October 2010. Progress report re. the Cockscomb Hill gold prospect, Manna Hill [Project] EL 3973. Appx 4 of EL 3973 third annual report to 4/11/2010. 48 pages, 4 appx, figures, 1 plate. Geographic Locality: One Tree Hill;Barrier Highway;Manna Hill;Paratoo Anticline;Winnininnie Dome;1995 AGSO BHEi Area 1ii Aerial Magnetic Survey;1995 AGSO BHEi Area 1ii Aerial Radioactivity Survey;2010 Panda Mining SA Tenements Aerial Magnetic Survey [Manna Hill area subset];2010 Panda Mining SA Tenements Aerial Radioactivity Survey [Manna Hill area subset];2010 Panda Mining SA Tenements Aerial DTM Survey [Manna Hill area subset] Doc No: Env 11761 Drillhole: CCB001;(337644)

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Language English
Metadata Standard ISO 19115-3

Citations

Use constraints License
License Creative Commons Attribution 4.0
Persistent identifier https://pid.sarig.sa.gov.au/document/mesac26531
Citation Crowe, J.;Hawke, P.;Wilson, P.;Isles, D.;Spence, M.;Kingma, K. 1917. Data release - as updated : One Tree Hill (part of the Manna Hill Project). Annual reports and final report to licence expiry/full surrender, for the period 5/11/2007 to 4/11/2017. Mineral Company Report - Mineral Exploration
https://pid.sarig.sa.gov.au/document/mesac26531

Technical information

Status
Maintenance and Update Frequency
Geographic Reference GDA2020 (EPSG:7844)
Geo bounding box {"type":"Polygon","coordinates":[[[139.5,-33],[140,-33],[140,-32],[139.5,-32],[139.5,-33]]]}
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