File:Kimberlite (Bellsbank Kimberlite, Early Cretaceous, 118 Ma; Bellsbank Mines, near Mount Rupert, north of Kimberley, South Africa) (14800868336).jpg
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[edit]DescriptionKimberlite (Bellsbank Kimberlite, Early Cretaceous, 118 Ma; Bellsbank Mines, near Mount Rupert, north of Kimberley, South Africa) (14800868336).jpg |
Afrikaans: Spesimen (6,6 cm breed tussen wydste punte) van Bellsbank-Kimberliet uit Kryttydse gesteentes in Suid-Afrika.
Kimberliete en lamproïete is van geweldige ekonomiese belang omdat hulle gasheergesteentes vir edelsteen- en nywerheidsgraad-diamante is. Hulle is ongewone stollingsliggame met, in geheel, pypvormige geometrieë. Hul vormingsmetode word net deels begryp omdat daar geen eietydse waarneming van hul vorming is nie. Die twee gesteentes is van verspreide gebiede oor die hele wêreld bekend, maar slegs sommige daarvan is beduidend diamantdraend. Indië en Brasilië is klassieke vindoorde vir diamante. Daar is ook bevind dat Afrika baie kimberliet het en die kontinent is wêreldbekend vir die produksie van groot hoeveelhede diamante. Ander gebiede met noemenswaardige voorkoms van diamantdraende kimberliet of lamproïet is in Rusland, China, die noordweste van Australië en die noordweste van Kanada geleë. English: Bellsbank Kimberlite from the Cretaceous of South Africa (6.6 cm across at its widest). Kimberlites and lamproites have tremendous economic importance because they are host rocks for gem-grade and industrial-grade diamonds. Kimberlites & lamproites are unusual igneous bodies having overall pipe-shaped geometries. Their mode of formation is only moderately understood because they have not been observed forming. Kimberlites & lamproites are known from scattered localities throughout the world - only some are significantly diamondiferous. Classic localities for diamonds are India and Brazil. Africa was also discovered to have many kimberlites and is world-famous for producing large numbers of diamonds. Other notable diamondiferous kimberlite-lamproite occurrences include Russia, China, northwestern Australia, and northwestern Canada. |
Date | |
Source | Kimberlite (Bellsbank Kimberlite, Early Cretaceous, 118 Ma; Bellsbank Mines, near Mount Rupert, north of Kimberley, South Africa) |
Author | James St. John |
Object location | 28° 13′ 01″ S, 24° 30′ 05″ E ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14800868336 (archive). It was reviewed on 1 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 December 2019
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current | 09:05, 1 December 2019 | ![]() | 994 × 660 (166 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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