Alteration indicators and areal fractions of microscopic fractures in the chloritized biotites for samples No. A1-A12 and No. 1–12 and the corresponding macroscopic fracture frequency in the 06MI03 borehole.

amabh: meters along borehole. bmasl: meters above sea level. cNumber of measured minerals. dMean value of alteration indicator. eStandard deviation. fMean areal fraction of microvoids in the alteration minerals. gUpper highly fractured domain (UHFD) and lower sparsely fractured domain (LSFD). hHornblende biotite granite (HBG) and biotite granite (BG). (XLSX)