Suakin Deep is one of the southern depressions of the Red Sea, with sedimen
ts containing up to 20 % of pyrite. Although metalliferous sediments result
from hydrothermal activity in most deeps, those of Suakin have different c
haracteristics. Pyrite is framboidal and the REE patterns of its sediments
are similar to those of biodetrital sediments. The sediments seem to be of
biodetritic origin and to have undergone diagenetic changes without hydroth
ermal activity. (C) 2000 Academie des sciences / Editions scientifiques et
medicales Elsevier SAS.