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Calcite from
Nchisi Island (Chilwa Island; Shirwa Island), Zomba, Southern Region, Malawi


Locality type:Island
Classification
Species:Calcite
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Nchisi Island (Chilwa Island; Shirwa Island), Zomba, Southern Region, Malawi
Data Identifiers
Mindat Occurrence Record ID:715035
Long-form Identifier:1:3:715035:7
GUID (UUID V4):0
Nearest other occurrences of Calcite
32.9km (20.5 miles) ā“˜Mount Malosa, Zomba, Southern Region, Malawi
33.8km (21.0 miles) ā“˜Nkalonje Hills, Phalombe, Southern Region, Malawi
37.9km (23.5 miles) ā“˜Bangala Hill Dike, Phalombe, Southern Region, Malawi
47.4km (29.4 miles) ā“˜Songwe Hill REE Project (Songwe Hill carbonatite), Phalombe, Southern Region, Malawi
53.5km (33.3 miles) ā“˜Utale Occurrence, Balaka, Southern Region, Malawi
54.0km (33.5 miles) ā“˜Namangali Hill, Phalombe, Southern Region, Malawi
63.7km (39.6 miles) ā“˜Nailuwa Occurrence, Balaka, Southern Region, Malawi
73.7km (45.8 miles) ā“˜Kapiri deposit, Balaka, Southern Region, Malawi
73.9km (45.9 miles) ā“˜Palula Occurrence, Balaka, Southern Region, Malawi
77.8km (48.3 miles) ā“˜Kangankunde Carbonatite Complex, Balaka, Southern Region, Malawi
References
Garson, M. S., & Smith, C. W. (1958). Chilwa Island: Geol. Surv. Nyasald., Mem, 1.
SNELLING, N. J. (1965) Age Determinations on Three African Carbonatites. Nature, 205 (4970). 491 doi:10.1038/205491a0
Woolley, A. R. (1969). Some aspects of fenitization with particular reference to Chilwa Island and Kangankunde, Malawi. British Museum (Natural History), Mineralogy, 2, 189-219.
Woolley, A. R.; Jones, G. C. (1987) The petrochemistry of the northern part of the Chilwa alkaline province, Malawi, in Alkaline Igneous Rocks. Geological Society, London, Special Publications, 30 (1). 335-355 doi:10.1144/gsl.sp.1987.030.01.16
SIMONETTI, A., BELL, K. (1994) Isotopic and Geochemical Investigation of the Chilwa Island Carbonatite Complex, Malawi: Evidence for a Depleted Mantle Source Region, Liquid Immiscibility, and Open-System Behaviour. Journal of Petrology, 35 (6) 1597-1621 doi:10.1093/petrology/35.6.1597
Eby, G.N., Roden-Tice, M., Krueger, H.L., Ewing, W., Faxon, E.H., Woolley, A.R. (1995) Geochronology and cooling history of the northern part of the Chilwa Alkaline Province, Malawi. Journal of African Earth Sciences, 20 (3) 275-288 doi:10.1016/0899-5362(95)00054-w
Berger, Vladimir I.; Singer, Donald A.; Orris, Greta J. (2009) Carbonatites of the World, Explored Deposits of Nb and REEā€”Database and Grade and Tonnage Models . Open-File Report 2009-1139. US Geological Survey doi:10.3133/ofr20091139
Dowman, E., Wall, F., Treloar, P. J., Rankin, A. H., & Corkhill, C. (2017). Rare-earth mobility as a result of multiple phases of fluid activity in fenite around the Chilwa Island Carbonatite, Malawi. Mineralogical Magazine, 81(6), 1367-1395.
 
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