Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Calcite from
Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia


00909050017362281245417.jpg
Calcite, etc.

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
02146640017272022055406.jpg
Calcite

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
01847460017272022066953.jpg
Calcite

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
01618660017272022074900.jpg
Calcite, etc.

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
00909050017362281245417.jpg
Calcite, etc.

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
03221970017363684274032.jpg
Calcite

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
04839440017363684274882.jpg
Calcite

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
08252260017363684272720.jpg
Calcite, etc.

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
03515850017363684289928.jpg
Calcite, etc.

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
02146640017272022055406.jpg
Calcite

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
01847460017272022066953.jpg
Calcite

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
01618660017272022074900.jpg
Calcite, etc.

Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
Locality type:Open-Cast Mine
Classification
Species:Calcite
Formula:CaCO3
Comments:In pegmatitic carbonatites and in associated sodic fenites : crystals up to 10 cm diameter.
In fenites.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Fluorite44
Quartz13
- var Chalcedony3
Goethite5
Celestine2
Limonite1
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
Photo GalleryView Gallery (8 photos)
Data Identifiers
Mindat Occurrence Record ID:150650
Long-form Identifier:1:3:150650:1
GUID (UUID V4):0
Nearest other occurrences of Calcite
94.7km (58.9 miles) ⓘKameelburg Complex, Kalkfeld, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
95.5km (59.3 miles) ⓘBaltika Mine, Baltika Farm 515, Otavi Constituency, Otjozondjupa Region, Namibia
97.6km (60.6 miles) ⓘKupferberg Mine, Otavi Constituency, Otjozondjupa Region, Namibia
99.3km (61.7 miles) ⓘGross Otavi Mine (Gross Otavi prospect), Otavi Constituency, Otjozondjupa Region, Namibia
References
Fluorite: The Collector's Choice. Extra Lapis English No. 9
Prins, P. 1981. The geochemical evolution of the alkaline and carbonatite complexes of the Damaraland igneous province, South West Africa. Annale Universiteit van Stellenbosch, Serie A1, Geologie, 3, 145-278.
Van Zijl, P.J. 1962. The geology, structure and petrology of the alkaline intrusions of Kalkfeld and Okorusu and the invaded Damara rocks. Annale Universiteit van Stellenbosch, Serie A, 37, 237-339.
Weninger, H. (1972): Zwei bemerkenswerte Mineralvorkommen in Südwestafrika. Der Karinthin 66, 280-284.
Harris, Chris (1995) Oxygen isotope geochemistry of the Mesozoic anorogenic complexes of Damaraland, northwest Namibia: evidence for crustal contamination and its effect on silica saturation. Contributions to Mineralogy and Petrology, 122 (3) 308-321 doi:10.1007/s004100050130
MILNER, S. C., LE ROEX, A. P., O'CONNOR, J. M. (1995) Age of Mesozoic igneous rocks in northwestern Namibia, and their relationship to continental breakup. Journal of the Geological Society, 152 (1). 97-104 doi:10.1144/gsjgs.152.1.0097
Le Roex, A. P., Lanyon, R. (1998) Isotope and Trace Element Geochemistry of Cretaceous Damaraland Lamprophyres and Carbonatites, Northwestern Namibia: Evidence for Plume--Lithosphere Interactions. Journal of Petrology, 39 (6) 1117-1146 doi:10.1093/petroj/39.6.1117
Hagni, R.D., , and Viladkar, S.G., (2006) Similarities And Disimilarities Between The Fluorspar Deposits At The Amba Dongar, India And Okorusu, Namibia Carbonatite Complexes. in Geological Association of Canada, Program with Abstracts Volume 31
Lohmeier, S., Machleidt, J., Klemd, R., Ellmies, R. (2023) Okorusu tailings – Part II: REE mineralisation, and oxygen and carbon isotope variations. South African Journal of Geology, 126 (3) 315-336 doi:10.25131/sajg.126.0015
 
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