Xxxxxxx Creek-type Haematite hosted Au-Cu-Bi Orebodies Sample Clauses

Xxxxxxx Creek-type Haematite hosted Au-Cu-Bi Orebodies. The discovery of the non-magnetic haematite-rich Chariot deposit in 1998 has resulted in a broader exploration model that allows for the presence of extensive ore grade mineralisation hosted within primary, non-magnetic (haematite-rich) ironstones. Discoveries by Giants Reef of high grade mineralisation associated with haematite dominant ironstone at Marathon and Xxxxx Boy, although small, are further examples of this style of mineralisation. Exploration for non-magnetic haematite ironstones are best identified using gravity surveys to identify dense rocks within Warramunga Formation sediments. At present there are no gravity maps for the Xxxxxxx Creek goldfield considered detailed enough to identify haematite targets. Apart from its use in a very regional way, the gravity method has not been utilised to any extent in the search for haematite-ironstone related mineralisation in the Xxxxxxx Creek field. A small number of projects in the goldfield, in particular those explored by Western Mining Corporation, have been covered with any detail. Most of these projects however, are not situated within the area considered by Giants Reef to hold economic mineralisation potential. As an exploration tool the gravity method would appear to be the obvious way to proceed, but the use of this technique in the same manner as magnetics is prohibitive, principally because of its cost. At present, with the exception of the Falcon airborne gravity gradiometer, there is no technique available to identify (cost effectively), the relatively small bodies of haematite that could contain economic mineralisation. As, essentially the total Warramunga Formation is a potential to host gold-rich ironstone bodies, magnetic and non-magnetic, selective areas for haematite mineralisation require targeting for which gravity surveying is required. The potential for the haematite ironstones to host mineralisation in non magnetic areas essentially opens up the whole Xxxxxxx Creek goldfield to new target review. Further target rationalisation would best be proceeded in areas where there is a coincident gravity and magnetic anomalism.