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Ann: Mount Birnie and Duchess New IP Anomalies, page-84

  1. GeoFiji
    1,047 Posts.
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    21/05/21
    12:41
    Post #: 53330504
    Geofantasy and soon to be shown for what it is based upon drilling but this is not a prediction but a way of me thinking out loud regardingexploration potential as just one input of many to my investment decisions.
    https://hotcopper.com.au/data/attachments/3199/3199523-a177e22ef52aed2029bf2d76143117d1.jpg

    The Mount Birnie areaappears to be constrained between two faults as indicated by possible faultcontrolled drainage. CNB mention the SW fault and fault breccia (which I have marked in as being near the old drilling but I don’t know the actual location).

    The Mount Birnie block mayshow evidence of opening up and mineralisation of the openings when the twoconstraining faults have moved laterally leading to multiple ore zones(dilational jog opening/s between the faults?). The upper or northern zone may correspond to the old workings shown and MBIP6 anomaly. The middle zone corresponds to the main old workings and now extends the prospective strike to around 500m, possible open to the NE (although maybe not if the zone is constrained by the fault on this side). The southern zone is likely much narrower than shown but the position is less certain. I have marked a possible supergene chalcocite blanket on the basis of the flat geometry of the IP anomaly here and the old records of a 1m thick 26% Cu chalcocite ore body entering the shaft from the east. Depths to these possible ore bodies needs to be scaled off the original IP sections.

    What does this mean forthe ore potential? This is not a prediction but a way of me thinking out loud regarding exploration potential. Many a drill hole has ruined a good prospect and it is possible that all IP anomalies apart from the one associated with the existing workings can be attributed to something other than ore. Even if it is there it may not be of sufficient grade to be profitable, a technical success.


    If the interpretation was geofantasythen the following is geostatitics fantasy on steroids but here goes:


    Previously posted byme: Mt. Birnie possible resource based upon currentfootprint - 250m depth x 100m shoot strike length x 8m true width x 2.7 =540,000 t @ 2% Cu (open in several directions and could be much larger, alsoparallel shoots in current drilling not included here).
    Now -

    Current possible resourcemain workings zone: 250m depth x 500m strike length x 8m true width x 2.7 density = 2.7Mt @ 2% Cu (mineralisation in zone width could be greater or not as the case may be, this width is based upon current drill intersections).

    Northern zone: 0.5-1Mt?

    Southern zone: Possiblysimilar potential to the main zone in terms of sulphides.

    Chalcocite blanket (isthis real?): 1m thick x 50m wide x 250m long x 2.7 = 33,750t @ 26% Cu

    Possible total 5+Mt @2%Cu + chalcocite - strike not closed off and depth extensions not closed off.

    Not investment advice andmay not prove to have any basis in fact. DYOR.

    CNB Price at posting: 48.5¢ Sentiment: Buy Disclosure: Held
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