『Abstract
The paper presents results of the detailed study of phosphorites
from manganiferous beds of the Chiatura deposit. The relatively
high -grade (P2O5 20-28%)
phosphorites are represented by various rocks ranging from the
variety dominated by massive phosphates with a rare aleuritic
admixture of quartz and feldspar grains to rocks mainly composed
of terrigenous material with phosphates in the matrix. Phosphates
make up the matrix of various organic remains: differently preserved
diatom algae and microbial species. Some relatively large organic
remains (in particular, sponge spicules) are typically composed
of iron minerals (with manganese admixture) rather than phosphates.
Manganese ores comprise phosphorite fragments composed of phosphatized
cyanobacterial mat. Phosphorites of the Chiatura deposit were
likely formed in a shallow-water zone away from the continental
land.』
(Introduction)
Materials and methods
Results
Discussion
Acknowledgments
References