Very low-grade metamorphism in the para-autochtonous sedimentary cover of the Pelvoux massif (Western Alps, France)

Potel, Sébastien; Trullenque, Ghislain

doi:10.1007/s00015-012-0102-8

Swiss Journal of Geosciences

Table 1 Samples identification, stratigraphic age, Illite Kübler index and chlorite “crystallinity” values of the <2 μm grain-size fraction samples (data in Δ°2θ), percent of 2M ₁ polytypes and K-white mica b cell dimension data

From: Very low-grade metamorphism in the para-autochtonous sedimentary cover of the Pelvoux massif (Western Alps, France)

Sample	Sratigraphic age	Elevation (m)	IC_Giessen Δ°2Θ	KI Δ°2Θ	1σ Δ°2Θ	ChC Δ°2Θ	ÁI Δ°2Θ	1σ Δ°2Θ	%2M ₁	b (Å)
Bea	Priabonian	1,350	0.31	0.36	0.004	0.30	0.28	0.004	92	9.024
Beb	Priabonian	1,370	0.33	0.38	0.004	0.30	0.29	0.007	87	9.009
CHA1	Priabonian	1,700	0.33	0.38	0.007	0.30	0.29	0.008	89	9.008
CHA2	Priabonian	1,710	0.36	0.41	0.004	0.32	0.30	0.010	72	9.015
CHA3	Priabonian	1,720	0.32	0.36	0.002	0.30	0.29	0.008	84	9.001
Do1	Mesozoic Cover	1,500	0.33	0.38	0.001	0.30	0.29	0.005	81	8.998
Do2	Mesozoic Cover	1,520	0.35	0.40	0.002	0.32	0.30	0.010	–	9.006
Do4a	Priabonian	1,835	0.33	0.38	0.004	0.30	0.29	0.012	–	9.026
Do4b	Priabonian	1,835	0.34	0.39	0.006	0.30	0.29	0.013	–	9.025
Do4	Priabonian	1,840	0.30	0.34	0.012	0.29	0.28	0.012	96	9.010
D05a	Mesozoic Cover	2,100	0.33	0.38	0.004	0.31	0.30	0.006	89	9.004
Do5c	Mesozoic Cover	2,105	0.32	0.37	0.008	0.31	0.29	0.010	79	9.007
DoF1a	Mesozoic Cover	1,700	0.35	0.41	0.003	0.32	0.30	0.007	–	–
DoF1b	Mesozoic Cover	1,700	0.38	0.45	0.001	0.33	0.32	0.019	73	–
DoF2	Priabonian	2,400	0.37	0.43	0.001	0.34	0.32	0.021	85	–
DoF3	Priabonian	2,200	0.33	0.38	0.004	0.30	0.29	0.004	84	9.025
Fo1b	Priabonian	1,800	0.32	0.37	0.002	0.30	0.28	0.011	88	9.018
Fo1c	Priabonian	1,740	0.31	0.35	0.004	0.29	0.28	0.021	90	9.010
Fo1e	Priabonian	1,740	0.33	0.38	0.003	0.30	0.28	0.009	–	–
Fo2b	Priabonian	1,760	0.32	0.37	0.001	0.30	0.28	0.005	95	9.017
Fo2c	Priabonian	1,760	0.31	0.36	0.004	0.30	0.29	0.006	90	9.019
Fo3a	Priabonian	2,100	0.31	0.35	0.002	0.29	0.28	0.009	82	9.028
Fo3b	Priabonian	2,100	0.36	0.42	0.004	0.32	0.31	0.007	81	9.025
Fo3c	Priabonian	2,100	0.39	0.46	0.017	0.32	0.31	0.010	70	–
Fo4b	Priabonian	1,640	0.35	0.41	0.004	0.31	0.29	0.005	90	9.016
YR1	Priabonian	2,700	0.37	0.43	0.006	0.33	0.31	0.003	81	9.021
YR2	Priabonian	2,700	0.34	0.39	0.006	0.29	0.28	0.010	–	–

IC illite “crystallinity” measured in Giessen, KI Kübler Index, ChC chlorite “crystallinity”of the 002 chlorite peak, ÁI Árkai Index, %2M ₁ percent of 2M ₁ polytypes. b(Å) K-white mica b cell dimension

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