Abstract
The author sets forth his ideas about the formation of dolomite rocks, according to prolonged mineralogical and petrographic investigations and in accordance with experimental physical and chemical data received by 0. K. Yanatyeva. It is shown that formation of dolomites may take place in various ways,' and that means of dolomitization by replacement are diverse, it being known that phenomena Of lime sediment replacement are predominant. Basic characteristics of primary chemical and of replacement dolomites belonging to the period of sediment diagenesis- are established. Six principal cases of the formation of replacement dolomites after, CaCO3 limes are distinguished. During the Precambrian and the Paleozoic CO2 in the atmosphere was much higher than at present; according to the author this contributed to the broadness- of the “field of dolomite formations” at that time. In most cases the increase in salinity to a Certain limit favors the formation of dolomites equalizing the solubilities of dolomite and...
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