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Table 1 Results in percentage of point counting analyses on thin sections from 8 samples

From: Formation of phyllosilicates in a fault zone affecting deeply buried arkosic sandstones: their influence on petrophysic properties (Annot sandstones, French external Alps)

 

Host rock from hanging wall

Core zone

Host rock from footwall

RT01

RT05

RT07

RT08

RT15

RT10

RT22

RT21

Polygenics fragments

11

16

14

10

7

6

13

9

Detrital quartz

33

28

40

37

32

22

34

25

Fresh feldspars

22

23

22

11

14

5

20

19

Altered feldspars

19

13

11

25

20

15

11

20

Detrital phyllosilicates

3

4

4

3

2

2

3

3

New formed phyllosilicates

6

10

5

5

24

28

8

12

Quartz veins

0

0

0

0

0

20

0

0

Calcite cement

6

7

4

4

0

0

4

12

Macroporosity

1

0

1

4

1

1

5

0

Total

100

100

100

100

100

100

100

100

  1. RT01, RT05, RT07, RT08 are located in the hanging-wall; RT10, RT15 are located in the fault core zone and RT22, RT21 are located in the footwall