Bulletin gold prospect, Sandstone, Sandstone Shire, Western Australia, Australia
| Latitude & Longitude (WGS84): | 28° 5' 3'' South , 119° 26' 54'' East |
|---|---|
| Latitude & Longitude (decimal): | -28.08443,119.44847 |
| GeoHash: | G#: qehbnp7sq |
| Locality type: | Prospect |
| KΓΆppen climate type: | BWh : Hot deserts climate |
The Bulletin prospect is about 20 kilometres south-east of Sandstone, and north north-east of the Ladybird prospect.
It sits on the eastern limb of the greenstone belt, in an area of metabasalt and metadolerite, as well as thin sedimentary marker beds of chert and banded iron formation, with much folding and shearing.
At the site is a 250 metre line of shafts following the line of lode, and exploited historically for 355 metres in length. Quartz veins are hosted by fine grained metabasalt. From 1911-1912, and 1936 to 1937, historic production was 943 ounces of gold.
Modern exploration drilling focussed on three areas. The first was directly west of the north-south main zone of the historic workings. Widespread low level gold anomalies was found in goethite altered quartz stringers within a porphyry intrusive.
The second area was south of the workings, along the line of lode. Mineralisation was found associated with banded iron formation and metabasalt, hosted in quartz stringers in an upper saprolite zone, and open to the south for 600 metres.
The third area was 500 metres east of the workings. Here was found a north-south striking mineralised zone associated with west dipping banded iron formation. The best gold grade was 1.80 g/t from 11 metres, with mineralisation open to the north.
The source notes the main reef was not drilled, and other gold found was erratic, and thin.
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
| Neoarchean - Mesoarchean 2500 - 3200 Ma ID: 3191865 | 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] |
| Archean 2500 - 4000 Ma ID: 793226 | mafic extrusive rocks 74255 Age: Archean (2500 - 4000 Ma) Description: Metabasalt, high-Mg basalt, tholeiitic basalt, carbonated basalt, agglomerate, mafic schist, dolerite, amphibolite; porphyritic basalt and dolerite; komatiitic basalt; mafic pyroclastics; minor mafic schist with granite intercalations Comments: igneous mafic volcanic; synthesis of multiple published descriptions Lithology: Igneous mafic volcanic 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] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
References
