Freetown layered complex, Guma Water, Sierra Leone

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.