Rock Steady Mine, Gullewa Goldfield, Yalgoo Shire, Western Australia, Australia
| Latitude & Longitude (WGS84): | 28° 40' 56'' South , 116° 17' 3'' East |
|---|---|
| Latitude & Longitude (decimal): | -28.68242,116.28439 |
| GeoHash: | G#: qdfsy4e8y |
| Locality type: | Mine |
| KΓΆppen climate type: | BSh : Hot semi-arid (steppe) climate |
The surface is covered by 15 metre thick laterite. Under this is several BIF units up to 10 metres wide which host the gold. The BIF is tightly folded, steep plunging, north-east trending syncline, with two folding events, and refolding of the folds. The mineralisation is in cherty BIF flanked by two well developed fault breccia zones/shears which marks the end of the gold mineralisation.
The surface laterite contains gold drawn from the underlying gold rich BIF. There are higher grades in hematite rich ironstone, and lower to barren in the black massive vuggy ironstone. There are local areas of jasperoid rock barren of gold. There are no significant sulphides in this deposit. There is minor glassy quartz away from the ore zones. Numerous clay rich zones cut the cherty BIF with low gold values.
Mineral List
3 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramRegional Geology
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
| Quaternary 0 - 2.588 Ma ID: 708426 | colluvium 38491 Age: Pleistocene (0 - 2.588 Ma) Description: Colluvium and/or residual deposits, sheetwash, talus, scree; boulder, gravel, sand; may include minor alluvial or sand plain deposits, local calcrete and reworked laterite Comments: regolith; synthesis of multiple published descriptions Lithology: Regolith 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). [5] |
| Neoarchean - Mesoarchean 2500 - 3200 Ma ID: 3188798 | Archean volcanic rocks Age: Archean (2500 - 3200 Ma) Comments: Yilgarn Craton Lithology: Greenstone belt; mafic-ultramafic volcanic rocks 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. [154] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
References
