Chemical Variations in a Granitic Pluton and Its Surrounding Rocks

Science  09 Oct 1964:
Vol. 146, Issue 3641, pp. 258-259
DOI: 10.1126/science.146.3641.258


New techniques of x-ray fluorescence spectrography have provided, for the first time, abundant data regarding chemical variability of granitic rocks on different scales. The results suggest that current designs of sampling plans for trend surface analysis should be modified; in particular several specimens, preferably drillcores, may be required at each locality.