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Table 2 Composition of eclogite facies garnet in SW9

From: The Theodul Glacier Unit, a slab of pre-Alpine rocks in the Alpine meta-ophiolite of Zermatt-Saas, Western Alps

 

Core

  

Rim

SiO2

37.41

37.43

37.43

37.17

TiO2

0.12

0.1

0.1

0.1

Al2O3

21.17

21.28

21.28

20.99

FeO

25.37

27.92

27.92

28

MnO

2.67

0.54

0.54

0.11

MgO

1.04

1.56

1.56

1.94

CaO

12.05

11.14

11.14

10.72

Total

99.83

99.97

99.97

99.03

Si

2.985

2.979

2.977

2.980

Ti

0.007

0.006

0.006

0.006

Al

1.991

1.996

1.995

1.983

Fe2+

1.693

1.857

1.857

1.877

Mn

0.180

0.036

0.042

0.009

Mg

0.124

0.184

0.185

0.232

Ca

1.030

0.949

0.949

0.921

Sum

8.010

8.007

8.012

8.008

Pyrope

4.09

6.11

6.10

7.63

Almandine

55.92

61.34

61.21

61.78

Spessartine

5.96

1.2

1.40

0.29

Grossular

34.03

31.35

31.29

30.30

  1. Total includes traces of Na.K and Cr