All analyses of the Mjáuvøtn A Tephra

This search has found 36 analyses

The results of your search are shown on this page, which is divided into three sections. The first contains geochemical data in the form of electron probe microanalyses of the the tephra layer you have chosen, which can be downloaded. Most of these analyses will be of glass shards. The second section gives information about the instrument conditions and the third details about the sources of the data and the date and time of your search. You should always refer to the original sources to get the full context of the data presented here.

FeO: total iron is represented as FeO
*original totals for normalised data (where applicable)
Site	Phase	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	Total	EP	Ref
Brúnavatn (Faroe Islands)	glass	48.38	4.22	13.98	13.98	0.20	4.82	10.75	2.98	0.86	0.45	100.62	35	2843
Brúnavatn (Faroe Islands)	glass	48.25	4.16	13.43	14.66	0.18	5.25	9.76	3.05	0.88	0.41	100.03	35	2843
Brúnavatn (Faroe Islands)	glass	48.10	3.99	13.26	14.57	0.19	4.97	9.60	3.04	0.84	0.42	98.97	35	2843
Brúnavatn (Faroe Islands)	glass	48.09	4.15	13.62	14.88	0.21	5.18	10.14	2.51	0.92	0.46	100.17	35	2843
Brúnavatn (Faroe Islands)	glass	47.77	4.24	13.38	14.66	0.20	5.28	9.91	3.15	0.83	0.46	99.88	35	2843
Brúnavatn (Faroe Islands)	glass	47.75	4.20	13.97	13.82	0.20	5.49	10.06	3.40	0.78	0.43	100.09	35	2843
Brúnavatn (Faroe Islands)	glass	47.67	4.30	13.46	15.09	0.15	5.20	9.81	3.12	0.87	0.50	100.17	35	2843
Brúnavatn (Faroe Islands)	glass	47.60	4.30	13.71	15.09	0.13	5.05	9.82	3.08	0.80	0.40	99.98	35	2843
Brúnavatn (Faroe Islands)	glass	47.39	3.96	13.31	14.47	0.11	5.16	9.81	2.60	0.75	0.48	98.03	35	2843
Brúnavatn (Faroe Islands)	glass	47.17	4.39	13.49	14.65	0.20	5.04	9.90	3.04	0.82	0.63	99.32	35	2843
Eiði (Faroe Islands)	glass	47.42	3.94	13.56	15.50	0.24	5.49	10.35	2.65	0.62		99.77	2	1454
Eiði (Faroe Islands)	glass	47.42	4.00	12.89	14.00	0.27	5.28	10.34	2.82	0.59		97.61	2	1454
Eiði (Faroe Islands)	glass	47.09	4.20	12.57	14.11	0.22	5.22	10.51	3.21	0.73		97.86	2	1454
Eiði (Faroe Islands)	glass	47.05	4.08	12.60	14.18	0.24	4.82	10.15	3.05	0.85		97.02	2	1454
Eiði (Faroe Islands)	glass	46.96	4.42	12.49	14.52	0.25	4.74	9.43	2.83	0.86		96.50	2	1454
Eiði (Faroe Islands)	glass	46.82	4.00	13.47	14.57	0.27	4.75	10.08	3.48	0.72		98.16	2	1454
Eiði (Faroe Islands)	glass	46.44	4.07	12.69	14.64	0.28	4.89	9.77	3.19	0.80		96.77	2	1454
Eiði (Faroe Islands)	glass	46.43	4.03	12.64	14.50	0.19	5.02	9.98	3.28	0.81		96.88	2	1454
Mjáuvøtn (Faroe Islands)	glass	48.04	4.23	13.75	13.82	0.18	5.66	10.71	3.07	0.77	0.43	100.66	35	2843
Mjáuvøtn (Faroe Islands)	glass	47.94	4.32	13.41	14.52	0.19	5.17	9.99	3.01	0.79	0.43	99.79	35	2843
Mjáuvøtn (Faroe Islands)	glass	47.88	4.48	13.37	13.41	0.19	6.23	11.06	2.95	0.69	0.50	100.77	35	2843
Mjáuvøtn (Faroe Islands)	glass	47.76	4.45	13.63	15.66	0.33	4.90	10.27	3.10	0.85	0.33	101.27	35	2843
Mjáuvøtn (Faroe Islands)	glass	47.05	4.18	13.54	14.36	0.19	5.34	9.85	3.13	0.78	0.45	98.88	35	2843
Mjáuvøtn (Faroe Islands)	glass	47.05	4.28	13.83	13.99	0.32	3.87	10.80	3.20	0.68		98.02	2	1454
Mjáuvøtn (Faroe Islands)	glass	47.04	4.42	13.51	14.81	0.31	4.54	10.13	3.25	0.91		98.92	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.85	4.18	13.04	14.71	0.26	4.87	9.58	3.15	0.81		97.45	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.80	4.50	13.65	14.64	0.17	5.44	9.75	3.00	0.77	0.34	99.06	35	2843
Mjáuvøtn (Faroe Islands)	glass	46.75	4.19	12.86	14.15	0.31	4.95	9.80	3.14	0.81		96.96	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.67	4.29	12.84	14.61	0.29	4.80	9.94	2.63	0.73		96.80	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.48	4.34	13.00	14.68	0.31	4.75	9.78	3.15	0.75		97.24	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.45	4.30	12.65	14.05	0.23	5.00	9.67	3.16	0.93		96.44	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.44	4.15	12.90	14.46	0.26	4.96	9.77	3.24	0.76		96.94	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.42	4.09	13.58	14.67	0.25	5.21	9.83	3.00	0.80	0.48	98.33	35	2843
Mjáuvøtn (Faroe Islands)	glass	46.24	4.14	12.65	14.22	0.65	5.36	9.51	3.28	0.83		96.88	2	1454
Mjáuvøtn (Faroe Islands)	glass	46.00	4.27	12.71	13.88	0.27	5.09	9.75	3.38	0.82		96.17	2	1454
Mjáuvøtn (Faroe Islands)	glass	45.65	4.36	11.91	15.09	0.21	4.63	11.68	2.24	0.71		96.48	2	1454

Instrument Conditions

These analyses were carried out under the following electron microprobe conditions.

Please refer to papers for full details of the instrument conditions, standards etc used to create these analyses
EP	Instrument	Beam current (nA)	Beam voltage (kV)	Correction	Beam	Sample	Comments
2	Cambridge Instruments Microscan V (University of Edinburgh)	15	20	ZAF		Thin section mounted in araldite then ground and polished
35	ARL-SEMQ microprobe(Geological Institute, University of Bergen)	10	15			Polished thin sections

References

The data on this page is from the following source(s). If you use this data please acknowledge the source of the data. he number preceeding each reference matches the Ref number on the data table above.

2843 - Olsen, J, Bjorck, S, Leng, MJ, Gudmundsdottir, ER, Odgaard, BV, Lutz, CM, Kendrick, CP, Andersen, TJ and Seidenkrantz, MS (2010) Lacustrine evidence of Holocene environmental change from three Faroese lakes: a multiproxy XRF and stable isotope study. Quaternary Science Reviews 29, ,2764-2780.

1454 - Wastegard, S., Bjorck, S., Grauert, M. and Hannon, G.E. (2001) The Mjauvotn tephra and other Holocene tephra horizons from the Faroe Islands: a link between the Icelandic source region, the Nordic Seas, and the European continent. The Holocene 11(1), 101-109..

Data Sources

All of the data contained in this database is either published or donated. When using the data, acknowledgement must be made of the original source of the data and that the data was obtained from Tephrabase. See Copyright information.

This Tephrabase search was made on 5/7/2025 at 07:28:55 local time, Edinburgh, Scotland, UK.