Jwaneng opencast mine
| Jwaneng opencast mine | |||
|---|---|---|---|
| General information about the mine | |||
 |
|||
| Mining technology | Open pit mine on 3.7 km² | ||
| Funding / year | 2.1 (2015) t | ||
| Information about the mining company | |||
| Operating company | Debswana | ||
| Start of operation | 1982 | ||
| Funded raw materials | |||
| Degradation of | Diamonds | ||
| Diamonds | |||
| Jwaneng | |||
| Raw material content | 0.000025% | ||
| Greatest depth | 400 m | ||
| overall length | 2.16 | ||
| Geographical location | |||
| Coordinates | 24 ° 31 '28.5 " S , 24 ° 42' 7.6" E | ||
|
|||
| Location | Khama Avenue | ||
| local community | Jwaneng | ||
| District | Southern District | ||
| Country | Botswana | ||
The Jwaneng opencast mine is an open-cast diamond mine in Botswana . Measured by the value of the diamonds expected there , the deposit is considered to be the richest of its kind in the world.
geography
location
The open pit is located north of the city of Jwaneng , 120 km as the crow flies (164 km by road) west of the capital Gaborone . The oval open pit has an area of about 2.3 by 1.6 kilometers on its surface.
geology
The Jwaneng deposit consists of four kimberlite vents that broke through the slates , dolomites and quartzites of the Pretoria group of the Transvaal Supergroup structure in the Permian , about 240–250 million years ago . The uppermost cover is formed by reddish Kalahari sands as well as sequences of pebbles containing carbonate cements with a joint thickness of up to 60 meters.
history
In 1972 diamonds were discovered in the Naledi River Valley . As a result, the Debswana company built an opencast mine on the site that was ceremoniously opened in August 1982 by the then President of Botswana, Ketumile Masire . In 2000, Jwaneng became the first mine in the country to achieve the ISO 14001 standard .
advancement
In 2015 Jwaneng mined diamonds with a total size of 10.5 million carats . The deposit has a high diamond density of 1.25 carats / ton, one of the reasons why it is considered the richest deposit in the world. In 2015, the mine bottom reached a depth of around 400 meters, which should have increased to 624 meters by 2017 [obsolete] . With the reserves of around 88.3 million carats established in 2012, the deposit ranks eighth worldwide. It is estimated that the deposit will not dry up before 2025.
literature
- Able Bwalya Tunono, Len Dimbungu: Jwaneng open pit mine cut 8 south east wall slope design . In: The Southern African Institute of Mining and Metallurgy (Ed.): Diamonds Source to use 2010 . 2010 ( saimm.co.za [PDF; accessed December 19, 2017]).
Web links
Individual evidence
- ↑ a b c Peter Guest: Inside the world's richest diamond mine. In: CNN. December 3, 2015, accessed December 16, 2017 .
- ↑ a b GC4FWYD Diamonds are Forever (Jwaneng, Botswana) (Earthcache) in Botswana created by funkymunkyzone. In: geocaching.com. Retrieved December 19, 2017 .
- ↑ a b c Able Bwalya Tunono, Len Dimbungu: Jwaneng open pit mine cut 8 south east wall slope design . In: The Southern African Institute of Mining and Metallurgy (Ed.): Diamonds Source to use 2010 . 2010 ( saimm.co.za [PDF; accessed December 19, 2017]).
- ^ Matthew Field, Johann Stiefenhofer, Jock Robey, Stephan Kurszlaukis: Kimberlite-hosted diamond deposits of southern Africa: A review . In: Ore Geology Reviews . No. 34 . Elsevier BV, 2008, p. 36, 37, 50 ff ., doi : 10.1016 / j.oregeorev.2007.11.002 ( rub.de [PDF; accessed December 19, 2017]).
- ^ Geological constraints on the eruption of the Jwaneng Center kimberlite pipe, Botswana. In: sciencedirect.com. Retrieved December 19, 2017 .
- ^ Jwaneng Diamond Mine - Mining Technology. In: mining-technology.com. Retrieved December 19, 2017 .
- ↑ a b Jwaneng Mine. Retrieved December 16, 2017 .
- ↑ Paul Zimnisky: The state of 2013 global rough diamond supply. (No longer available online.) January 22, 2013, archived from the original on January 28, 2013 ; accessed on December 16, 2017 (English).
- ↑ Praveen Duddu: The world's top 10 biggest diamond mines. In: Mining Technology. October 13, 2013, accessed on December 16, 2017 (English): "160 miles south-west"