Carboniferous-Permian tectono-metamorphic evolution of the Pelvoux Massif (External Crystalline Massif, Western Alps), with discussion on flow kinematics of the Eastern-Variscan Shear Zone

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Table 3

Representative chemical compositions of minerals used for themobarometric calculation.

	Garnet		Biotite		Muscovite	Plagioclase
MCE339v		MCE338		MCE339v	MCE338	MCE338	MCE338
Core	Rim	Core	Rim
Oxydes (wt%)
SiO₂	36.39	36.71	36.38	36.54		34.19	35.05	46.27		61.19
Al₂O₃	20.34	20.44	20.48	20.16		19.23	18.45	36.41		23.14
TiO₂	0.19	0.05	0.03	0.01		1.66	1.47	0.34
FeO	29.56	33.90	31.96	30.09		20.16	20.48	1.33
MgO	1.27	2.31	3.14	2.02		8.63	9.10	0.69
MnO	4.57	0.86	4.78	8.13		0.05	0.05	0.02
CaO	6.62	5.14	1.93	1.31		0.00	0.02	0.03		4.83
Na₂O						0.11	0.18	1.31		8.61
K₂O						8.51	8.99	9.62		0.11
Total	98.94	99.41	98.70	98.26		92.54	93.79	96.02		97.88
Mol cations
Si	2.97	2.97	2.97	3.02		2.68	2.72	3.05		2.79
Al	1.96	1.96	1.98	1.96		1.78	1.69	2.83		1.24
Ti	0.01	0.00	0.00	0.00			0.09	0.02
Fe²⁺	2.02	2.30	2.14	2.05		1.32	1.33	0.07
Fe³⁺	0.00	0.00	0.05	0.03
Mg	0.16	0.28	0.38	0.25		1.01	1.05	0.07
Mn	0.32	0.06	0.33	0.61		0.00	0.00	0.00
Ca	0.58	0.45	0.57	0.11		0.00	0.00	0.00		0.24
Na						0.02	0.03	0.17		0.62
K						0.85	0.89	0.81		0.01
X_Fe						0.57	0.56
End members									71.89
An										27.34
Orth										0.77
Prp	5.13	9.21	12.66	8.35
Alm	65.26	74.09	70.77	68.69
Grs	18.87	14.49	5.51	3.85
Sps	10.45	1.96	10.97	19.07

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