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


Locality type:Island
Classification
Species:'Synchysite' (not an IMA approved species)
Formula:Ca(Ce/Nd/Y/REE)(CO3)2F
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Synchysite data
Locality Data:Click here to view Nchisi Island (Chilwa Island; Shirwa Island), Zomba, Southern Region, Malawi
Data Identifiers
Mindat Occurrence Record ID:143572
Long-form Identifier:1:3:143572:6
GUID (UUID V4):0
Nearest other occurrences of Synchysite
33.8km (21.0 miles) ⓘNkalonje Hills, Phalombe, Southern Region, Malawi
47.4km (29.4 miles) ⓘSongwe Hill REE Project (Songwe Hill carbonatite), Phalombe, Southern Region, Malawi
73.7km (45.8 miles) ⓘKapiri deposit, 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 REE—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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