Annual Compliance Report 2017-2018 for Peculiar Knob Iron, Rare Earths Mine.
Created: 07 Nov 2024 Revised: 07 Nov 2024

PECULIAR KNOB, a deposit of 2 NE-trending sub-parallel, elongate lenses of coarse grained, specular hematite in host granitoid of the Mount Woods Complex. Both lodes pinch and swell along strike, both dip steeply to NW. There are minor offsets of...

PECULIAR KNOB, a deposit of 2 NE-trending sub-parallel, elongate lenses of coarse grained, specular hematite in host granitoid of the Mount Woods Complex. Both lodes pinch and swell along strike, both dip steeply to NW. There are minor offsets of the lodes by cross faults. Along strike the lenses taper down to narrow veins. It was initially identified by its prominent linear aeromagnetic signature. Follow up drilling identified hematite bodies with overall dimensions ~1 km long EW, by ~35m wide. The deepest drill intersection indicated massive hematite to >300m depth. Although the mineralogy is dominantly non-magnetic hematite, it was discovered that the strong magnetic signature was due to strong remnant magnetisation attributed to a preserved magnetite core within individual hematite grains. Younger cover sediment is a thin layer of Quaternary, red-brown clay, sand and silt over 12-20m of flat-lying mudstone of the Cretaceous Bulldog Shale containing minor gypsum. The hematite deposit was thought to be of hydrothermal origin, formed by the replacement by hematite of a favourable host rock constituted dominantly of quartz and magnetite. Later drilling by Western Plains Resources LTD to a depth ~120m identified a JORC-compliant resource of 19.4Mt @ 63.7% Fe, 0.01% P, 7.3% SiO2, 0.3% Al2O3, and 0.5% LOI, using a cut-off grade of 55% Fe (2010).

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About this record

Record No mesac28146
Topic Geoscientific Information
Type of Resource Document
Category Type Earth Sciences
Document Type Mineral Company Report - Mining Operation Compliance
Contributor
Sponsor
Tenement
Tenement Holder
Operator Southern Iron Pty Ltd
Geological Province
    Mine Name Peculiar Knob
    Stratigraphy
    Commodity
      Notes
      Doc No: MCR 3978910

      Doc No: MCR 3978910

      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/mesac28146
      Citation Annual Compliance Report 2017-2018 for Peculiar Knob Iron, Rare Earths Mine. Mineral Company Report - Mining Operation Compliance
      https://pid.sarig.sa.gov.au/document/mesac28146

      Technical information

      Status
      Maintenance and Update Frequency
      Geographic Reference GDA2020 (EPSG:7844)
      Geo bounding box {"type":"Polygon","coordinates":[[[134,-30],[134.5,-30],[134.5,-29.5],[134,-29.5],[134,-30]]]}
      Purpose
      
                          
                          
      
                          
                        
      Lineage