Parageneza fosforytów i ewaporatów w fanerozoiku

Oleg l. Petryczenko

Abstract


PARAGENESIS OF PHOSPHORITE-BEARING AND EVAPORITE FORMATIONS DURING THE PHANEROZOIC


Summary
The problem of relations between phosphorite-bearing and evaporite formations has been repeatedly discussed during the last two decades. Evolution of evaporate formations in Phanerozoic and its relation to the chemical composition of marine water [8, 10] makes possible to re-consider this problem. The results are summarized in Fig. 1 that includes the data on cooccurrence of phosphorite-bearing and evaporite formations. It was concluded that there exists a direct relation between the intensity of evaporite and phosphorite-bearing carbonate accumulations during the Phanerozoic. This relation is even more clear for sedimentary basins in which marine waters were of chlorine-calcium type. The study was partly supported by International Science Foundation, grant no. VCMOOO.

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