Development of the phosphogenetic processes in the Lower Carboniferous deposits of the Holy Cross Mts.

Andrzej Kühn, Krzysztof Radlicz


Concretional and stratal phosphorites from the Lower Carboniferous deposits developed in the Culmian facies of the Gałęzice Syncline and the Kielce - Łagów Synclinorium are described in the present paper. Two generations of phosphate precipitation were observed: a sedimentary and a diagenetic, together with a collophane transition facies into a crystalline apatite. The phosphorites formed in eupelagic deposits directly on the bottom of the basin - at the boundary of the oxidation and reduction environments, i,e., in conditions different from those of phosphorite accumulations in shallow-water shelf deposits.

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