East Rand Mine
{{Short description|Gold mine in Gauteng province near Johannesburg, South Africa}}
{{Use dmy dates|date=April 2022}}
{{Infobox gold mine
| name = East Rand Proprietary Mine Ltd.
| image =
| width =
| caption =
| pushpin_map = South Africa
| pushpin_label =East Rand Gold Mine
| pushpin_map_caption = Location in South Africa
| coordinates = {{coord|26.10|S|28.32|E|format=dms|display=inline,title}}
| place = Boksburg
| subdivision_type = Province
| state/province = Gauteng
| country = South Africa
| owner = OroTree Limited
| official website = {{URL|https://www.orotree.com}}
| acquisition year = 2019
| financial year = 2007-08
| amount = 79,479
| opening year =1893
| active years =120
| closing year =2008
}}
East Rand Proprietary Mines (ERPM) is a 125-year-old underground gold mining operation on the Witwatersrand Basin at Boksburg, to the east of Johannesburg. The mine employed 3,850 people. It was the deepest mine in the world until 2008 at 3,585 metres, slightly more than the TauTona mine, also in South Africa, which was 3,581 metres at the time (in 2008 the TauTona mine completed a digging project that extended the depth of the mine by several hundred metres.){{cite news |title=TauTona, Anglo Gold - Mining Technology |url=http://www.mining-technology.com/projects/tautona_goldmine/ |publisher=SPG Media Group PLC |date=2009-01-01 |accessdate=2009-11-20 }}
The mine closed in 2008. Historical gold production between 1896 and 2008 was {{convert|43000000|ozt|t|order=flip}} recovered gold grade of 8.1g/t (95% plant recovery).
High grade gold deposits remain with existing in situ resources (SAMREC compliant) of {{convert|63000000|ozt|t}}, including;
- Measured & Indicated resource of {{convert|13600000|ozt|t}} at 6.7g/t.
- Inferred resources of {{convert|50000000|ozt|t}} at 4.92 g/t.
The Cason mine dump was once the world’s highest man made hills. This dump is currently being recycled. It is now a shadow of its former self and will probably disappear in the future.
Production
Recent production figures:[http://www.drd.co.za/bus/ops_sa_er.asp ERPM] {{webarchive|url=https://web.archive.org/web/20091011074804/http://www.drd.co.za/bus/ops_sa_er.asp |date=2009-10-11 }} DRD Gold website, accessed: 29 September 2009
| class="wikitable" | |
| align="center" bgcolor="#DAA520"
| Year | Production | Cost per ounce | |
| align="center"
| 2007 | 80,216 ounces | US $641 |
| align="center"
| 2008 | 79,479 ounces | US $748 |
| align="center" |
History
File:East Rand Proprietary Mines Ltd 1928.jpg
The ERPM engineered many mining techniques which are still in place today, including "Long Wall Mining". The mine also built the world's largest ice factory which produced up to 8,000 t of ice daily to cool wall rock temperatures of 50-60 degrees Celsius.
The mine was acquired by private Malaysian mining company OroTree [https://orotree.com/east-rand/ OroTree Limited] {{Webarchive|url=https://web.archive.org/web/20190530045345/https://orotree.com/east-rand/ |date=30 May 2019 }} on 26 February 2019.
1963-1-13 ERPM mijn - liftschacht.jpg|Mine shaft (1963)
1963-1-13 ERPM mijn - 1 dag productie goud Balanced.jpg|Daily production (1963)
1963-1-13 ERPM mijn - goud smelt.jpg|Smelting
1963-1-13 ERPM mijn - Herkomst zwarte arbeiders.jpg|Lists of mineworkers
References
{{reflist}}
- Tucker, Rodney & Viljoen, Richard & J. Viljoen, Morris. (2016). A Review of the Witwatersrand Basin - The World's Greatest Goldfield. Episodes. 39. 105. 10.18814/epiiugs/2016/v39i2/95771.
External links
{{commons category}}
- [http://www.ngdir.ir/GeoportalInfo/SubjectInfoDetail.asp?PID=454&index=87 Details from NGD Iran] {{Webarchive|url=https://web.archive.org/web/20070313010102/http://www.ngdir.ir/GeoportalInfo/SubjectInfoDetail.asp?PID=454&index=87 |date=13 March 2007 }}
- [http://www.infomine.com/index/properties/EAST_RAND_PROPERTIES.html InfoMine listing]
- [https://www.researchgate.net/publication/305924249_A_Review_of_the_Witwatersrand_Basin_-_The_World%27s_Greatest_Goldfield]
- [http://www.historicalpapers.wits.ac.za/inventories/inv_pdfo/A1138/A1138-147-2-001-jpeg.pdf]
- [https://www.mindat.org/loc-10864.html]
- [http://www.marthinusen.co.za/crusher/8683.html]
- OroTree acquires ERPM GOLD MINE [https://www.drdgold.com/investors-and-media/sens-news-view/2019/cec7fd7a-f2de-444b-b268-75e1c6975f2a]
- Malaysian Explorer acquires ERPM Gold Mine [https://www.spglobal.com/marketintelligence/en/news-insights/trending/r-dDMaM9zxJYtJgBij_2rQ2]
{{Greater Johannesburg|econ}}
{{Witwatersrand companies}}
Category:Gold mines in South Africa
Category:Buildings and structures in Gauteng
Category:Underground mines in South Africa
Category:Economy of Ekurhuleni
{{Gauteng-geo-stub}}