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Freetown layered complex, Guma Water, Sierra Leone

Chromite
Freetown layered complex, Guma Water, Sierra Leone

Photo: Rob Lavinsky
A layered gabbro complex with disseminated PGM.


References

- Beckinsale, R. D.; Bowles, J. F. W.; Pankhurst, R. J.; Wells, M. K., 1977: Rubidium-Strontium Age Studies and Geochemistry of Acid Veins in the Freetown Complex, Sierra Leone. Mineralogical Magazine, 41, 501-511.
- Bowles, J.F.W. (2000) Prassoite, vysotskite and keithconnite from the Freetown layered complex, Sierra Leone. Mineralogy and Petrology: 68: 75-84.
- Bowles, J. F. W., 2000: A Primary Platinum Occurrence in the Freetown Layered Intrusion, Sierra Leone. Mineralium Deposita, 35, 583-586.
- Bowles, J. F. W.; Gize, A. P.; Cowden, A., 1994: The Mobility of the Platinum-Group Elements in the Soils of the Freetown Peninsula, Sierra Leone. Canadian Mineralogist, 32, 957-967.
- Bowles, J. F. W., 1986: The Development of Platinum-Group Minerals in Laterites. Economic Geology, 81, 1278-1285.
- Bowles, J. F. W., 1981: The Distinctive Suite of Platinum-Group Minerals from Guma Water, Sierra Leone. Bulletin de Minéralogie, 104, 478-483.
- Cabri, L. J.; Harris, D. C.; Weiser, T. F., 1996: Mineralogy and Distribution of Platinum-Group Mineral (PGM) Placer Deposits of the World. Exploration and Mining Geology, 5, 73-167.
- Bowles, J.F.W. (2000): A primary platinum occurrence in the Freetown Layered Intrusion, Sierra Leone. Mineralium Deposita 35, 583-586.

Mineral List

'Albite-Anorthite Series'
Augite
'Bauxite'
Bornite
Chalcopyrite
Chromite
Cooperite
Erlichmanite
Forsterite
Isoferroplatinum
Keithconnite
Laurite
Miassite
Pentlandite
Platinum
Prassoite
Pyrrhotite
Quartz
Tulameenite
Vysotskite


20 entries listed. 17 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Jun 2011 04:56:28
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