Timing and conditions of brittle faulting on the Silltal-Brenner Fault Zone, Eastern Alps (Austria)

Swiss Journal of Geosciences

Table 1 Quantitative determination of mineralogy of the size fractions determined by X-Ray diffraction (XRD) on air-dried and glycolated samples

Sample	Quartz	Plagioclase	Calcite	Chlorite	Smectite	Illite/Mica 2M₁	Paragonite 2M₁
SB2 <0.4 μm				5	35	60
SB2 <2 μm	<1			9	32	59
SB2 2–6 μm	2			9	34	55
SB2 6–10 μm	2			10	34	54
SB3 <0.4 μm				3	34	63
SB3 <2 μm				7	17	75	1
SB3 2–6 μm	4			19	13	60	4
SB3 6–10 μm	9			34	5	47	5
SB4 <0.1 μm				2	9	88
SB4 <0.4 μm				6	33	61
SB4 <2 μm				6	32	62
SB4 2–6 μm	2			11	27	60	<1
SB4 6–10 μm	4			20	21	53	2
BF1 <0.1 μm				12		88
BF1 <0.4 μm				15		85
BF1 <2 μm	2			17		81
BF1 2–6 μm	5	2		17		76
BF1 6–10 μm	10	2		11		76
BF1 WR	24	5	2	9		60
BF2 <0.1 μm				11		89
BF2 <0.4 μm				10		90
BF2 <2 μm	2			23		76
BF2 2–6 μm	2			17		81
BF2 6–10 μm	6			17		76
BF2 WR	33	6		8		52

The potential error on the estimates is taken as ±5 %. WR (“whole rock”) refers to the field sample as collected, without size fraction separation