Английская Википедия:Gol Gohar mine
Шаблон:Short description Шаблон:Infobox mine Gol Gohar, or Gol-e Gohar (Persian:گل گهر), is the largest iron ore mine in Iran.[1] It has a total iron ore reserve of 1.135 billion tons,[2]Шаблон:Rp and produces about 11 million tons of iron annually as of 2006.[3] It is located about 55 km southwest of the city of Sirjan and is roughly equidistant from the cities of Kerman, Shiraz, and Bandar Abbas.[2]Шаблон:Rp
The Gol Gohar deposits consist of 6 different deposit areas, or "anomalies", in a space of about 10 km by 4 km area.[2]Шаблон:Rp Areas 1 and 2 have been fully mapped, and area 3 has been partly mapped as of 2003.[4]Шаблон:Rp Mining has been done at area 1 since 1994; area 3 has the most extensive iron ore deposits; the other areas are relatively small and as of 2003 there were no plans to explore them further.[4]Шаблон:Rp
History
Iron ore has been mined at Gol Gohar for an estimated 900 years; a large underground mine and smaller open-pit mine in the center of the area used to exist as traces of historical mining activity, but activity since the 20th century has mostly erased these traces.[4]Шаблон:Rp An estimated 350,000 tons of iron ore were extracted from the old mines at Gol Gohar over the course of their existence.[4]Шаблон:Rp
In 1969, the Iran Barite Company began exploratory work at the Gol Gohar site; this was then delegated to the National Iranian Steel Industries Co. (or NISIC), a government corporation that now operates under the name National Iran Steel Company.[4]Шаблон:Rp NISIC then entered into a joint venture with the Swedish company Granges International Mining to continue exploring the deposits.[4]Шаблон:Rp Exploratory drillings began in 1975 on 6 different areas, and mining activity began in 1994.[4]Шаблон:Rp
Geology
The Gol Gohar complex is located in a depression known locally as the Kheyrabad Salt Lake, which itself is located on the northeastern margin of the Sanandaj-Sirjan tectonic-metamorphic belt.[4]Шаблон:Rp The underlying basement rock consists of Paleozoic metamorphic rocks;[4]Шаблон:Rp mainly gneiss, mica schist, amphibiolites, quartz schist, marble, dolomite, and calcite.[2]Шаблон:Rp Above these are Mesozoic and Cenozoic sedimentary rocks and Quaternary alluvial deposits.[4]Шаблон:Rp
The ore body itself is estimated to be lenticular in shape, about 2600 m long from east to west and about 400 m wide from north to south.[4]Шаблон:Rp Several different proposals have been put forward for how it originated: Ljung (1976) suggested a metasedimentary origin, Muke and Golestaneh (1982-91) proposed a magmatic origin similar to the Kiruna mine in Sweden, Hallaji (1992) argued in favor of a metasomatic origin, and Khalili (1993) proposed a volcanic sedimentary origin.[4]Шаблон:Rp
Gallery
References
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