Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Sundowner gold prospects, Bronzewing Goldfield (Mount McClure), Leonora Shire, Western Australia, Australia

This page is currently not sponsored. Click here to sponsor this page.
 
Latitude & Longitude (WGS84): 27° 19' 11'' South , 121° 3' 50'' East
Latitude & Longitude (decimal): -27.3197777807, 121.0637894


Some geologists get very excited about regolith. We are talking here about clays, sediments, alluvium etc. As gold was found in the Bronzewing area in this material, it is time I am afraid to face this subject. While Sundowner is an anomalous gold prospect, the source succeeds to filling several pages of regolith description without mentioning gold once for Sundowner.

The Sundowner prospect is 12 kilometres north-east of the Bronzewing Gold Mine, and just north of Bates Creek.

The transported overburden at the prospect is 100 metres deep. The top 50 metres is similar in composition to that found at Bronzewing, except with the addition of more feldspar and coarse quartz from a granite area to the north-west.

Below the 50 metre mark is puggy goelithic clay, dominated by small 0.5 to 5 mm spherical pisoliths, with cores of either hematite-maghemite, Fe clay, organic debris, quartz or a mix of these. Between the two lithologies described above is an 8 metre band of Fe gravels.

Soils in the sediments contain quartz grains, hematite, kaolinite and minor feldspar, muscovite and calcite. The clays described above range from dark brown to reddish maroon, consisting of hematite, quartz, kaolinite and minor goethite, with some hematite pseudomorphing after wood fragments.

At the 60 to 90 metres mark the clays also contain laterite nodules, pisoliths, duricrust, collapsed mottled saprolite, mottled saprolite, Fe saprolite, saprolite and then bedrock.

Nodular angular and platy fragments of mottled saprolite is composed of hematite, goethite, kaolin, gibbsite, quartz and anatase. The nodules are sometimes pseudomorphs of primary minerals. Also contained in the mottled saprolite is red, hematitic, tabular Fe fragments 10-70 mms across.

In the upper level of the saprolite, weathering has created voids, and when these amalgamate causes the saprolite to collapse. This forms then a condensed residual horizon. Nodules within this horizon are yellowish brown but are dark brown or black above this.

Fe saprolite is yellowish brown or reddish brown of kaolin impregnated by goethite. The upper saprolite contains cream, light yellow and grey clays of kaolin, smectite and quartz.

Near the base is creamy buff, light green, or khaki cream coloured clays and saprolite fragments with weathered chloritic basalt passing into fresh bedrock. The lower part of the saprolite contains chlorite, feldspar, quartz, calcite, mica and pyrite.

Mineral List


11 valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!



The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Neil Phillips, G., Vearncombe, J.R., and Eshuys, E. (1998): Yandal Greenstone Belt, Western Australia- 12 million ounces of gold in the 1990s. Mineralium Deposita (1998):33: 310-316.

Annand, R.R., Wildman, J.E., Varga, Z.S., Phang, C. (2001), Bronzewing District Western Australia, CRC LEME, 2001

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: September 25, 2017 09:09:16 Page generated: March 17, 2017 15:54:22
Go to top of page