Michelangelo Mine, Gullewa Goldfield, Yalgoo Shire, Western Australia, Australia
| Latitude & Longitude (WGS84): | 28° 40' 14'' South , 116° 16' 45'' East |
|---|---|
| Latitude & Longitude (decimal): | -28.67074,116.27943 |
| GeoHash: | G#: qdfsyh8hg |
| Locality type: | Mine |
| KΓΆppen climate type: | BSh : Hot semi-arid (steppe) climate |
The surface contains laterite, then below this waxy light grey clay, mottled clays and ferricrete totalling 5 to 15 metres thick, then another clay zone 10 to 15 metres thick. Next is a saprolite zone to 60 metres below the surface, and finally bedrock of metabasalt, BIF, and felsic quartz porphyry.
The gold is contained in 2 secondary zones and a primary zone:
1. Horizontal to gently north dipping laterite 1 to 5 metres thick containing most of the gold mineralisation.
2. Saprolite hosted in sericite altered silica rich saprolite clays from the extensive weathering of the felsic porphyry intruding into the metabasalt, with some supergene enrichment of the gold.
3. A primary zone of steeply dipping shears marginal to and within the felsic quartz porphyry, crosscut and truncated by BIF units.
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
