...Peter Redshaw; David Boon; Grace Campbell; Matthew Willis; Julius Mattai; Matthew Free; Colm Jordan; Simon J. Kemp; Anna Morley; Michael Thomas Abstract At 06:50 on Monday 14 August 2017, a hillslope on the Freetown Peninsula, Sierra Leone, collapsed, sending 300 000 m 3 of debris into the flooded...

...John F. W. Bowles; Saioa Suárez; Hazel M. Prichard; Peter C. Fisher ABSTRACT Inclusions of platinum-group minerals (PGM) within alluvial isoferroplatinum nuggets from the Freetown Peninsula, Sierra Leone, are aligned with their shape determined by the structure of their host. The edges...

...John F. W. Bowles; Saioa Suárez; Hazel M. Prichard; Peter C. Fisher ABSTRACT Heavy mineral concentrates from rivers and river terraces near York, Freetown Peninsula, Sierra Leone have been examined for their platinum-group mineral (PGM) content. The alluvial PGM are 0.1 to 1.5 mm in size...

...John F.W. Bowles; Hazel M. Prichard; Saioa Suárez; Peter C. Fisher Abstract Platinum-group minerals (PGM) have been located in magnetite-bearing gabbroic rocks of the Freetown Layered Complex, Sierra Leone for the first time. The PGM occurrences described here are from four stratiform layers...

... evidence concerning the formation of macroscopic (~ μ m in size) platinum-group mineral grains, the authors have studied the osmium isotope ratios in PGM grains from the Freetown peninsula in Sierra Leone using an ion microprobe. Indirect isotopic evidence and modeling are required to infer their origin...

... relating to the formation of eluvial and alluvial PGM deposits using the Freetown deposits (Sierra Leone) as the principal example. There is unambiguous partitioning of the more soluble palladium and gold into ground and surface waters, and preferential deposition of platinum in soils and eluvial...

...T. C. Davies; T. W. Bloxam Abstract Multielement analyses of residual lateritic soils over an area in the western part of the Freetown intrusive igneous complex, Sierra Leone, have revealed sympathetic secondary dispersion of some potential pathfinder elements associated with high platinum and iron...

...B. Chinsman Summary The main quarries producing quality aggregates for heavy civil engineering and road construction in Freetown can be found along the mountains directly overlooking the north-eastern area of the city. At these sites, the rocks are first dislodged by blasting after which...