|
Fraction
|
Qtz
|
Crt
|
Trd
|
Fsp
|
Smct
|
Opx
|
Mica
|
Pyl
|
Kao
|
Pyr
|
Alu
|
Anh
|
Gyp
|
|---|
|
Bulk
|
***
|
**
|
f
|
**
|
f
|
***
|
f
|
f
|
*
|
*
|
***
|
f
|
**
|
|
Coarse
|
***
|
***
|
*
|
**
|
f
|
***
|
f
|
f
|
*
|
***
|
*
|
f
|
*
|
|
Medium
|
***
|
**
|
f
|
***
|
f
| |
f
|
f
|
***
|
**
|
**
|
***
|
*
|
|
Fine
|
***
|
f
| | |
**
|
f
|
**
|
f
|
***
|
f
|
***
| |
***
|
- The minerals are: Qtz: quartz, Crt: cristobalite, Trd: tridymite, Fsp: feldspars, Smct: smectite, Opx: orthopyroxene, mica: mica minerals, Pyl: pyrophyllite, Kao: 7 Å-kaolin-group mineral, Pyr: pyrite, Alu: alunite, natroalunite and minamiite, Ahd: anhydrite, and Gyp: gypsum
- The intensities of X-ray peaks in the XRD analysis are shown as: *** intense; ** weak; * minor; f: faint and blank none
