Black Diamond Mine, Hatches Creek Wolfram Field, Hatches Creek, Barkly Region, Northern Territory, Australia
|Latitude & Longitude (WGS84):||20° 52' 52'' South , 135° 11' 22'' East|
|Latitude & Longitude (decimal):||-20.88118,135.18969|
|Köppen climate type:||BWh : Hot deserts climate|
The Black Diamond wolfram mine is in the Wolfram Hill section of the Hatches Creek wolfram field. To reach take the track south, opposite the Pioneer mine on the Kurundi Road (Binns Track). After about two kilometres a track branches east north-east turning then gradually north over a one kilometre length to a 3 way intersection. Take the right track, which over another kilometre will go through a full half circle eventually heading west, and ending at the Black Diamond mine, which occupies a steep gully of Wolfram Hill.
This mine was one of the main producers on the field. It has three principal lodes, outcropping for 600 feet, north-east to south-west, 100 feet apart. A substantial tonnage of ellivial wolfram was won from the gully.
The lodes are in sandstone, quartzite, greywacke, and siltstone of the Hatches Creek sedimentary rocks. The bedding strikes east, and dips south by 25-85 degrees, with severe jointing. The outcrop of the lodes is said to be obscured by much mullock and workings in the gully.
Wolframite and quartz is associated with minor mica, very minor scheelite, bismutite, and malachite. The secondary minerals are more common at depth. High grade ore was found in the eastern strike, where the reef is flatter in dip, but the reef becomes poorer and more irregular at depth, where it splits frequently. This is caused by the junction of the reef with a second reef in the Footwall.
Main Lode, No. 3 Lode and South Lode are named by Ryan as the most important, who goes into great detail over the internal structures of the lodes. Comparatively the briefest descriptions will be given here.
The Main Lode is the most northern, developed by a number of shafts, an open cut 10 feet deep, and two adits a length of 200 feet each. A new Main Shaft was sunk in 1951 reaching a depth of 200 feet by 1956. The lode is 600 feet long, but surface outcropping is rare. The richest shoots are 14-30 inches wide, striking east, dipping south 78 degrees, bounded to the east and west by two faults called Kennedy and Bassula after the 1950's owners of the lease.
The No. 3 Lode outcrops for 108 feet, as a number of narrow discontinuous reefs at the north-east end of the workings. It contains shallow open cuts, and the No. 3 Shaft on a 12 inch wide reef. The Bassula Fault displaces the reef 10 feet east of the shaft.
The South Lode has limited outcrop over a length of 180 feet. The vertical South Shaft reaches a depth of 120 feet, on one reef 9-15 inches wide, dipping south 69-76 degrees. The reef is displaced by a number of vertical faults, at which point rich patches of wolfram was found.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
4 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
1800 - 2050 Ma
Age: Orosirian (1800 - 2050 Ma)
Stratigraphic Name: Kurinelli Sandstone
Comments: sedimentary siliciclastic; synthesis of multiple published descriptions
Lithology: Sedimentary siliciclastic
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).