Abstract
Thirty-one Normanskill greywackes and twenty-four Quebec group (Charny formation) arkoses, of turbidite origin, have been analysed spectrographically to determine the concentrations of Ag, B, Ba, Be, Co, Cr, Cu, Ga, La, Mg, Mn, Mo, Ni, Sc, Sr, Ti, V, Y and Zr. The distribution of the trace elements and of magnesium is shown by histograms. One greywacke was disaggregated into four major constituents, carbonate, clay, quartz-feldspar and heavy minerals, illustrating what each fraction contributes to the chemical composition of the rock. Correlation of chemical and mineral composition is attempted, statistical analysis was carried out showing correlations between all pairs of elements and the role of each element in the turbidites is discussed.
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