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Finsch mine, Lime Acres, Gordonia District, Namakwa District (Namaqualand), Northern Cape Province, South Africa

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Latitude & Longitude (WGS84): 28° 23' 17'' South , 23° 27' 23'' East
Latitude & Longitude (decimal): -28.38806,23.45639
GeoHash:G#: kdbwtb07t
Owned/operated by:Petra Diamonds Ltd (100%)
Locality type:Mine
Köppen climate type:BSk : Cold semi-arid (steppe) climate
Other/historical names associated with this locality:Asbestos hills


Finsch is one of the world’s significant diamond mines and South Africa’s second largest diamond operation by production (after De Beers’ Venetia mine).

The pipe was discovered in 1960 by two prospectors, Fincham and Schwabel, for whom it was named, while prospecting for asbestos in the Asbestos hills, about 150 km west of Kimberley. They established Finsch Diamonds in 1960, but De Beers gained a controlling interest in the deposit in 1963.

The mine was officially opened in 1967. Ore extraction was initially from the open pit. Sinking of the main shaft to access the mine from underground started in 1978. Two vertical shaft complexes, tunnels and ground handling infrastructure were prepared for the continuing exploitation of the pipe with the use of highly mechanised mining methods. In 2008 the treatment plant was upgraded at a cost of approximately US$100 million. On 14 September 2011, Petra Diamonds purchased Finsch as a fully-staffed, operating mine from De Beers.

Finsch is known for highly commercial goods of +5 carats and is rich in gem quality smaller diamonds. Large, special diamonds are also a feature of the orebody, with a number of +50 carat stones recovered at the mine annually, and the mine also produces very rare fancy yellow diamonds.


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


6 valid minerals.

Rock Types Recorded

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!

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Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Pleistocene - Paleogene
0.0117 - 66 Ma



ID: 3308516

Age: Cenozoic (0.0117 - 66 Ma)

Lithology: Sedimentary

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Rhyacian - Siderian
2050 - 2500 Ma



ID: 2227045
Asbestos Hills Subgroup of Ghaap Group of Transvaal Supergroup

Age: Proterozoic (2050 - 2500 Ma)

Stratigraphic Name: Asbestos Hills Subgroup

Description: Banded iron-formation, jaspilite, riebeckite-amphibolite

Reference: Council for Geoscience. Geologic map of South Africa, 1:1M. National Science Councils of South Africa. [41]

Siderian
2300 - 2500 Ma



ID: 3185728
Paleoproterozoic sedimentary rocks

Age: Siderian (2300 - 2500 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page 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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Gurney, J.J., Harris, J.W., and Rickard, R.S. (1979) Silicate and oxide inclusions in diamonds from the Finsch kimberlite pipe. In: Boyd, F.R., and H.O.A. Meyer, H.O.A. (Eds.): Kimberlites, Diatremes and Diamonds: their Geology and Petrology and Geochemistry, Vol. 1: 1-15. American Geophysical Union, Washington, D.C.
Contributions to Mineralogy and Petrology (1992) Historical Archives 110(1), 133-138.
Morris, N. (2005) Diamonds and other gems. Appleseed Editions Ltd, East Sussex.
Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008) Kimberlite-hosted diamond deposits of southern Africa: A review. Ore Geology Reviews 34, 33-75.

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