AML is currently exploring a potential repeat of the highly productive Broken Hill ore system some 15 kilometres along strike to the north. The RazorbackWest Project is a fault displaced block of Broken Hill host rocks with a strike length of 12 kilometres, wholly owned by AML. This zone is largely covered by outwash gravels but RAB drilling has identified lead and zinc anomalies 5 kilometres long.
Prior to AML acquiring the ground, this 12 kilometre trend had never been drill tested, despite being located just 15 kilometres along strike from the world’s richest base metal deposit.
To date, AML has concentrated exploration in the poorly exposed, southern part of this corridor where it has outlined zinc and lead geochemical anomalies beneath a veneer of alluvium and soil over 5 kilometres long, coincident with geophysical anomalies including IP, magnetics and gravity.
Drilling by AML has focused on a central zinc anomaly and encountered a northwest-dipping zone of anomalous zinc and lead. Limited historic RABdrilling in the northern part of the corridor hosts a similar zinc anomaly which has never been drilled. Of significant interest is an elongate lead anomaly to the west and subparallel to the main zinc anomaly which extends for approximately 7 kilometres and is 100 to 300 metres wide. It coincides with an IP chargeability anomaly which is 1 kilometre long and hosts elevated ground gravity responses.
Geological interpretation, based on core drilling, suggests the western lead anomaly marks the stratigraphic position of the Hores Gneiss. This rock lies in the upper parts of the Broken Hill Group and is host to, or intimately associated with, some of the most significant zinc-lead-silver ore bodies at Broken Hill.
This western zone has never been drilled and AML considers there to be significant potential for discovery of a Broken Hill type deposit with more detailed work including RAB and RC drilling planned.