Tsumeb

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Tsumeb
Okavisume
City
St. Barbara Church - Tsumeb
St. Barbara Church - Tsumeb
Official seal of Tsumeb
Seal
Motto: Glück Auf
(German mining term for Good luck!)
Satellite view
Satellite view
Tsumeb is located in Namibia
Tsumeb
Tsumeb
Location in Namibia
Coordinates: 19°15′S 17°52′E / 19.250°S 17.867°E / -19.250; 17.867
Country  Namibia
Region Oshikoto Region
Elevation 4,098 ft (1,249 m)
Population (2011)[1]
 • Total 19,275
Time zone South African Standard Time (UTC+1)

Tsumeb (Otjiherero name: Okavisume)[2] is a city[3] of 15,000 inhabitants and the largest town in Oshikoto region in northern Namibia. Tsumeb is the "gateway to the north" of Namibia.[4] It is the closest town to the Etosha National Park. Tsumeb used to be the regional capital of Oshikoto until 2008 when Omuthiya was proclaimed a town and the new capital.[5] The area around Tsumeb forms its own electoral constituency and has a population of 44,113.[6] The town is the site of a deep mine (the lower workings now closed), that in its heyday was known simply as "The Tsumeb Mine" but has since been renamed the Ongopolo mine.

The town and the Tsumeb mine[edit]

Main road in Tsumeb
Tsumeb open cast pit, buildings and railway about 1931

The name Tsumeb is generally pronounced "SOO-meb". The name is not a derivative of German, Afrikaans, or English. It has been suggested that it comes from Nama and means either "Place of the moss" or "Place of the frog". Perhaps this old name had something to do with the huge natural hill of green, oxidized copper ore that existed there before it was mined out.

The town was founded in 1905 by the German colonial power and celebrated its 100th year of existence in 2005.

Tsumeb is notable for the huge mineralized pipe that led to its foundation. The origin of the pipe has been hotly debated. The pipe penetrates more or less vertically through the Precambrian Otavi dolomite for at least 1300 m. One possibility is that the pipe was actually a gigantic ancient cave system and that the rock filling it is sand that seeped in from above. If the pipe is volcanic, as some have suggested, then the rock filling it (the "pseudo-aplite") is peculiar in the extreme. The pipe was mined in prehistoric times but those ancient workers barely scratched the surface. Most of the ore was removed in the 20th century by cut-and-fill methods. The ore was polymetallic and from it copper, lead, silver, gold, arsenic and germanium were won. There was also a fair amount of zinc present but the recovery of this metal was always difficult for technical reasons. The pipe was famous for its richness. Many millions of tonnes of ore of spectacular grade were removed. A good percentage of the ore (called "direct smelting ore") was so rich that it was sent straight to the smelter situated near the town without first having to be processed through the mineral enrichment plant. The Tsumeb mine is also renowned amongst mineral collectors. Between 1905 and 1996, the mine produced about 30 million tons of ore yielding 1.7 Mt copper, 2.8 Mt lead 0.9 Mt zinc, as well as 80 t germanium.[7] The average ore grade was 10% Pb, 4.3% Cu, 3.5% Zn, 100 ppm Ag, 50 ppm Ge.[8]

It is noted for 243 valid minerals and is the type location for 56 types of mineral. Some of the germanium minerals are only found in this mine.[9]

Gem-quality dioptase crystals from the Tsumeb mine, source of many of the world's best (and most expensive) dioptase specimens.

Tsumeb, since its founding, has been primarily a mining town. The mine was originally owned by the OMEG (Otavi Minen- und Eisenbahn-Gesellschaft) and later by TCL (Tsumeb Corporation Limited) before its closure a few years ago, when the ore at depth ran out. The main shafts became flooded by ground water over a kilometre deep and the water was collected and pumped as far as the capital, Windhoek. The mine has since been opened up again by a group of local entrepreneurs ("Ongopolo Mining"). A fair amount of oxidized ore remains to be recovered in the old upper levels of the mine. It is highly unlikely, though, that the deepest levels will ever be reopened.[9]

The other notable feature of the town is the metal smelter, currently owned by Namibia Custom Smelters. The Annual Copper Festival is a well-known event on the local festival calendar.

Sinkhole lakes and the world's biggest meteorite[edit]

Near to the town are two large and famous sinkhole lakes, Lake Otjikoto and Lake Guinas ("Gwee-nus"). Guinas, at about 500 m in diameter, is somewhat larger in area than Otjikoto. A pioneering documentary movie about scuba diving in these lakes was made by Graham Ferreira in the early 1970s. The depths of the lakes are unknown, because towards the bottom both lakes disappear into lateral cave systems, so it is not possible to use a weight to sound them. Otjikoto, which has poor visibility (owing to pollution from agricultural fertilizers used nearby), is at least 60 m deep. The water in Guinas is completely clear and well over 100 m deep. Divers who have performed bounce-dives in Guinas to 80 m (strictly speaking, beyond the safe depth for SCUBA dives, especially given the altitude of the lake above sealevel) have reported that there was nothing but powdery-blue water below them. Guinas has been in existence for so long that a unique species of fish, Tilapia guinasana, has evolved in its waters.

When South Africa invaded German Southwest Africa, today's Namibia, in 1914, the retreating German forces eventually threw all of their weaponry and supplies into the deep waters of Otjikoto. Some of the material has been recovered for display in museums.

Lake Otjikoto

One of the largest and deepest underground lakes in the world lies a little to the east of Tsumeb, on a farm called Harasib. To reach the water in the cave one has either to abseil or to descend an ancient, hand-forged ladder that hangs free of the vertical dolomite walls of the cave for over 50 m. Here, too, SCUBA divers have descended as deep as they have dared (80 m) in the crystal-clear waters and have reported nothing but deep blue below them from one ledge of dolomite to the next with nothing discernible in the depths.

The largest meteorite in the world, called Hoba, lies in a field about forty minutes drive to the east of Tsumeb, at Hoba west. It is a nickel-iron meteorite of about 60 tonnes.

Transport[edit]

Otavi Mining and Railway Company train near Tsumeb about 1931. The photograph must have been taken in winter, as the trees have no leaves. Despite the fact that Tsumeb is in the tropics, it is well over a thousand metres above sea level and frosty in winter.

Tsumeb is connected to the national railway network operated by TransNamib. Tsumeb was for most of the 20th century the terminus of the line but in recent times the track has been extended a further 260 km to reach Ondangwa. There have been talks of extending the line to Oshikango and having the Government of Angola build a railroad from the north to connect the two countries together.

The junction for the Ondangwa line is located at the "wrong end" of Tsumeb railway station, leaving it a dead end, though a second triangle is provided for through trains to bypass the station.

Tsumeb has a concrete sleeper factory.[10]

Roads[edit]

There are main roads leading north, Ondangwa through to Oshakati and Angola, north-east a new constructed Bituminous Road to Tsintsabis leading to Katwitwi Border Post and Angola, east, Grootfontein through to Rundu and Katima Mulilo, and south, Otavi through to Otjiwarongo and Windhoek.

Industry[edit]

Ohorongo Cement was established in 2007. The plant is situated between Tsumeb and Otavi on Farm Sargberg approximately 45 km south of Tsumeb. The plant has a production capacity of 650000 tpa, almost double the demand of the Namibian domestic market. It is owned by Schwenk KG. Limestone reserves appear to be adequate for approximately 300 years.[11]

There are 105 commercial farms around Tsumeb. The area consists largely of rolling hills covered in thorn bush. Tsumeb falls under the dry woodland, savanna vegetation zone. The soil around Tsumeb varies in quality from very fertile red loam through black turf to chalky clay and loam. The district is thus suitable for intensified farming and crop production. There is an abundance of ground water and regular rainfall in the summer months. Irrigation makes the area even more productive. Farmers in the area grow citrus fruits with much success. The main crops grown are maize, sorghum and sunflowers. Cattle farming is also widespread.[12]

Politics[edit]

Local authority results, 2010[edit]

In the 2010 local authority election, a total of 3,120 votes were cast in the city. SWAPO won with approximately 75% of the vote. Of the four other parties seeking seats, RDP received approximately 15% of the vote, followed by UDF (5%), APP (2%), DTA (2%) and, despite being on the ballot, the Congress of Democrats did not receive a vote.[13] Mr Nico Kaiyamo is one of the well-known and established local politicians.

Town twinning[edit]

Notable residents[edit]

Geography[edit]

Climate[edit]

Tsumeb has a humid subtropical climate (Cwa, according to the Köppen climate classification), with hot summers and mild winters (with warm days and chilly nights). It borders on a semi-arid climate (BSh). The average annual precipitation is 528 mm (21 in).

Tsumeb
Climate chart (explanation)
J F M A M J J A S O N D
 
 
130
 
31
18
 
 
121
 
30
18
 
 
91
 
29
17
 
 
34
 
29
14
 
 
4
 
27
9
 
 
1
 
25
6
 
 
0
 
25
5
 
 
0
 
28
8
 
 
2
 
32
13
 
 
18
 
33
16
 
 
60
 
33
18
 
 
67
 
33
18
Average max. and min. temperatures in °C
Precipitation totals in mm
Source: World Climate Guide

Minerals of Tsumeb[edit]

Tsumeb belongs to the world's most prolific mineralogical sites, famous especially thanks to both beautiful and rare secondary minerals of Pb, Cu, Zn, As, Sb and, what is characteristic and reflects the ore chemistry, Ge, Ga and Cd. Minerals first described from Tsumeb include, according to Mindat.org:

  • rare (but also a few common) arsenates: andyrobertsite, arsenbrackebuschite, arsendescloizite, arsentsumebite, biehlite, calcioandyrobertsite, chudobaite, duftite, ekatite, fahleite, feinglosite, ferrilotharmeyerite, gaitite, gebhardite, gerdtremmelite, helmutwinklerite, jamesite, johillerite, keyite, koritnigite, leiteite, ludlockite, lukrahnite, molybdofornacite, o'danielite, prosperite, reinerite, schneiderhöhnite, schultenite, sewardite, stranskiite, thometzekite, tsumcorite, warikahnite, wilhelmkleinite, zincgartrellite and zincroselite
  • unique germanium (bartelkeite, calvertite, eyselite, fleischerite, germanite, itoite, krieselite (germanate topaz), mathewrogersite, otjisumeite, ovamboite, schaurteite and stottite) and gallium (gallobeudantite, söhngeite, tsumgallite) minerals
  • others are: kegelite, minrecordite, otavite, plumbotsumite, queitite, sidpietersite (unique thiosulphate), stibioclaudetite, tsumebite and zincrosasite.[16][17][18]


Educational Institutes and Training Facilities[edit]

Tsumeb is home to a number of primary and secondary schools as well as an Adult Education Center, which resorts under the Ministry of Education and Culture, which greatly fulfills a major task in enabling adults to further their education.

Training facilities[edit]

  • Namibia Institute of Mining and Technology (NIMT)(Northern campus)
  • Adult Education Center
  • Polytechnic of Namibia Center
  • University of Namibia Center

Schools[edit]

References[edit]

  1. ^ "Table 4.2.2 Urban population by Census years (2001 and 2011)". Namibia 2011 - Population and Housing Census Main Report. Namibia Statistics Agency. p. 39. Retrieved 10 September 2013. 
  2. ^ Menges, Werner (12 May 2005). "Windhoek?! Rather make that Otjomuise". The Namibian. 
  3. ^ "Local Authorities". Association of Local Authorities in Namibia (ALAN). Retrieved 1 October 2012. 
  4. ^ Place online
  5. ^ Govt Won't Let Tsumeb Die - Mayor
  6. ^ Constituencies of Namibia, 2004
  7. ^ Melcher, F. (2003). "The Otavi Mountain Land in Namibia: Tsumeb, germanium and snowball earth.". Mitteilungen der Österreichischen Mineralogischen Gesellschaft 148: 413–435. 
  8. ^ Lombaard, A.F., Günzel, A., Innes, J., Krüger, T.L. (1986). "The Tsumeb lead–copper–zinc–silver deposit, South West Africa/Namibia.". Anhaeusser, C.R., Maske, S. (Eds.), Mineral Deposits of Southern Africa, Geol. Soc. South Africa, Johannesburg 2: 1761–1782. 
  9. ^ a b Tsumeb mine mineral list, TL = type location.
  10. ^ http://www.railpage.com.au/f-t11339857-s30.htm
  11. ^ http://www.ohorongo-cement.com/
  12. ^ http://tsumeb.info/agriculture.htm
  13. ^ Local Authority Election Results for Tsumeb
  14. ^ "Chesterfield Twinning Links". Chesterfield Borough Council. Retrieved 2013-07-27. 
  15. ^ "Laureate Ben Hauwanga | Junior Achievement Namibia". Ja-namibia.org. Retrieved 2 July 2012. 
  16. ^ Mindat Tsumeb Mine
  17. ^ Handbook of Mineralogy
  18. ^ Webmineral

External links[edit]

Coordinates: 19°15′S 17°42′E / 19.250°S 17.700°E / -19.250; 17.700