Fosterville (How does this compare with SXG so far? (I'm no Gold FA'er.))
https://www.agnicoeagle.com/English/operations/operations/Fosterville-Gold-Mine/default.aspx#:~:text=Gold%20was%20first%20discovered%20in,from%20shallow%20oxide%20open%20pits.Geology and Mineralization
The Fosterville Goldfield is located within the Bendigo Structural Zone in the Lachlan Fold Belt. The deposit is hosted by an interbedded turbidite sequence of sandstones, siltstones and shales. This sequence has been metamorphosed to sub-greenschist facies and folded into a set of upright, open to closed folds.
Mineralization at Fosterville is controlled by late brittle faulting. These faults are generally steeply west-dipping reverse faults with a series of moderately west-dipping reverse splay faults formed in the footwall of the main fault. There are also moderately east-dipping faults which have become more significant footwall to the anticlinal offsets along the west dipping faults. Primary gold mineralization occurs as disseminated arsenopyrite and pyrite forming as a selvage to veins in a quartz-carbonate veinlet stockwork. The mineralization is structurally controlled with high-grade zones localized by the geometric relationship between bedding and faulting. Mineralized shoots are typically 4 to 15 metres thick, 50 to 150 metres up/down dip and 300 to 1,500 metres down plunge, and have average grades of 5 to 10 g/t gold, with individual assays up to 60 g/t gold.
Primary gold at Fosterville also occurs as visible gold that variably overprints sulphide mineralization and is found as disseminated fine specks of gold within host quartz veins. The visible gold is spatially associated with antimony mineralization in the form of stibnite that occurs with quartz and varies from replacement and infill of earlier quartz-carbonate stockwork veins, to massive stibnite-only veins of up to 0.5 metres in width. The stibnite-quartz event occurs in favourable structural locations, such as the Phoenix, Eagle and Lower Phoenix structures.
The occurrence of visible gold is becoming increasingly significant at depth and is observed more frequently below approximately 800 metres depth, down-plunge within the Lower Phoenix and Harrier gold systems.
https://www.southerncrossgold.com.au/projects/sunday-creek
The Sunday Creek Project is a shallow orogenic (or epizonal) Fosterville-style deposit located approximately 60 km north of Melbourne and contained within 19,385 ha of both granted exploration licences and one granted retention licence.
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