Petrographic modal analysis

Chayes, F., Petrographic Modal Analysis, Wiley and Sons, New York, 1956. 

Carver, R. E. (ed.), 1971. Procedures in Sedimentary Petrology. Wiley-Interscience, New York, 653 pp. Chayes, R, 1956a. Petrographic Modal Analysis. John Wiley Sons, New York, 113 pp. 

This study is based on the integrated analysis of 211 m of cores taken from two oil wells (AB-1 and AB-2) in the Albacora Field (Fig. 1). A total of 170 thin sections were selected for detailed petrographic investigation of the carbonate cements 54 of these were selected for modal compositional analyses by counting of 300 points per thin section. Sampling was representative of the cored intervals. The carbonate cements were stained with a solution of 0.15% HCl, 1.0% potassium ferrocyanide and 0.1% alizarin red-S in order to determine Fe distribution. The cathodoluminescence of the cements was examined through a TECHNOSYN luminoscope. 

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