|Latitude & Longitude (WGS84):||29° 44' 32'' South , 121° 4' 15'' East|
|Latitude & Longitude (decimal):||-29.74233,121.07088|
|Köppen climate type:||BWh : Hot deserts climate|
The Black Jack was one of the early leases on the Menzies Goldfield, and was worked continuously from 1895 to 1913.
It was initially developed by the Lady Main Company, sinking a shaft to 187 feet on a 2 foot wide, north-west to south-east trending reef. There is also a 12 foot wide kaolin and conglomerate lode all being gold bearing. A crushing was taken out amounting to 112 ounces 13 dwt. Dis-satisfied with the result, the company abandoned the lease.
Prospectors Spalholz and Evans took over and produced about 1000 tonnes of ore from the old company workings. In 1907, G. Henderson and Hurley took over the mine, and opened a 300 foot long ore shoot north of the southern workings. This produced approximately 500 ounces of gold. By 1913 this shoot had petered out at depth.
In 1997, a small shallow pit was dug at the site (since filled in) on a near surface laterite oxide lode, obtaining 24 000 tonnes of ore at 2.61 g/t yielding 2021 ounces of gold. A line of shafts exists for other historic leases to the south, and minor workings to a limited extent north of the Black Jack Mine.
The mine is five kilometres south of Menzies, and 1 kilometre east of the Goldfields Highway.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
2 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
2500 - 4000 Ma
Age: Archean (2500 - 4000 Ma)
Comments: meta-igneous mafic; synthesis of multiple published descriptions
Lithology: Meta-igneous mafic
Reference: Raymond, O.L., Liu, S., Gallagher, R., Zhang, W., Highet, L.M. Surface Geology of Australia 1:1 million scale dataset 2012 edition. Commonwealth of Australia (Geoscience Australia). 
|Neoarchean - Mesoarchean|
2500 - 3200 Ma
|Archean volcanic rocks|
Age: Archean (2500 - 3200 Ma)
Comments: Yilgarn Craton
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.