Citation:

epic.29457.d001

Name: Tab. 1 Analyses of major phases in Vestgötabreen formation schists
Creator: G M Manby
Published: 1978
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

The glaucophane schists of Oscar II Land, it has been suggested, originated in a compressive plate boundary subduction zone environment. An alternative hypothesis is presented here linking the metamorphism of these schists with that of the surrounding pre-Carboniferous rocks. It has been estimated from mineralogical and textural relationships that at the time of metamorphism these rocks exceeded 30 km in thickness. Similarly, an ambient geothermal gradient of 15° C/km has been calculated for the now exposed succession. Pressures of sufficient magnitude would be realised near the base of this geosynclinal pile to produce eclogite from rocks of basic composition. Subsequent synmetamorphic penetrative deformation would give rise to glaucophane and greenschist facies assemblages.

Coverage:

Latitude: 78.472000 * Longitude: 12.510000

Event(s):

Vestgötabreen (formation) * Latitude: 78.472000 * Longitude: 12.510000 * Location: Oscar II Land, Svalbard * Method/Device: Geological profile sampling (GEOPRO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device
1	Minerals	Minerals		Manby, G M
2	Silicon dioxide	SiO2	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
3	Titanium dioxide	TiO2	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
4	Aluminium oxide	Al2O3	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
5	Iron oxide, FeO	FeO	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
6	Manganese oxide	MnO	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
7	Magnesium oxide	MgO	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
8	Calcium oxide	CaO	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
9	Potassium oxide	K2O	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
10	Sodium oxide	Na2O	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser
11	Elements, total	Total	%	Manby, G M	Cambridge E.D.S. electron probe microanalyser

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

296 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Minerals	2 SiO2 [%]	3 TiO2 [%]	4 Al2O3 [%]	5 FeO [%]	6 MnO [%]	7 MgO [%]	8 CaO [%]	9 K2O [%]	10 Na2O [%]	11 Total [%]
Garnets	39.46		22.31	26.65	0.75	6.59	5.98			102.24
Garnets	39.60		22.79	30.65	0.78	3.60	7.38			104.80
Garnets	39.35		21.98	29.42	0.83	3.96	6.51			102.10
Garnets	38.54		21.43	28.88	0.73	3.39	7.85			100.83
Garnets	38.21		21.50	30.06	0.50	3.31	7.49			101.05
Garnets	39.40		22.33	29.26	2.12	4.26	6.14			103.54
Garnets	40.34		23.31	28.54	0.26	8.76	2.89			104.11
Garnets	39.68		22.38	28.52	0.44	4.83	7.23			103.17
Garnets	40.12		22.77	27.63	0.51	6.60	6.33			103.95
Garnets	38.59		22.22	30.43	0.68	3.43	6.72			102.70
Garnets	39.23		29.87	26.50	0.69	5.23	7.81			101.31
Garnets	39.41		22.41	28.45	0.98	4.20	7.11			102.56
Garnets	39.93		22.72	27.45	0.25	10.19	2.12			102.67
Garnets	39.47		21.84	27.87	1.28	5.28	5.79			101.53
Garnets	39.85		22.47	27.92	0.70	6.50	5.46			102.91
Omphacites	57.22	0.12	9.43	9.79		6.11	10.56		9.05	102.20
Omphacites	57.90		11.63	7.67		5.89	9.80		8.97	101.87
Omphacites	48.07		13.80	11.37		15.77	0.36		4.63	94.00
White micas	47.61	0.31	27.21	2.90		2.85	0.08	9.28	0.30	90.54
White micas	51.85	0.31	29.02	2.97		2.86		9.75	0.44	97.19
White micas	51.27	0.38	29.08	1.60		3.20		9.68	0.39	59.59
White micas	50.08	0.39	27.95	3.38		3.19		9.58	0.39	94.95
White micas	50.56	0.16	26.80	3.53		2.60		9.50		93.15
Glaucophanes	58.22		8.46	12.87		10.46	2.34	0.77	5.66	98.08
Glaucophanes	59.24		8.97	11.75		9.79	0.21		7.49	98.36
Glaucophanes	57.93		9.72	12.93		8.94	0.12		7.53	97.36
Glaucophanes	59.38		10.32	10.20		11.68	0.95		7.17	99.70
Glaucophanes	59.44		10.19	9.97		11.57	1.01		7.21	99.38
Glaucophanes	59.15		9.62	13.86		9.25	0.20		7.88	100.00
Glaucophanes	57.41		9.09	10.43		10.16	0.47		7.05	95.39
Glaucophanes	56.84		9.44	10.15		11.40	1.94		6.75	96.50
Glaucophanes	56.20		9.11	14.47		8.88	0.46		6.88	96.12
Epidotes	36.36		23.13	10.75	0.11		25.88			96.23
Epidotes	38.16		26.04	9.77	0.13		22.72			96.83
Epidotes	38.64		24.85	11.64			23.05			98.18
Epidotes	31.46		19.65	9.35		0.38	28.14			88.18
Epidotes	38.46		26.59	8.77			22.67			96.67