QUB-383a (Askja 1875 Tephra) at Borge

This search has found 17 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.

Geochemistry

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  SiO2 TiO2 Al2O3 FeOMnOMgO CaO Na2O K2OTotal EP Ref
 75.450.1712.172.33 0.441.093.092.80 97.55171958
 74.750.8112.713.10 0.582.223.872.42 100.46171958
 74.010.7912.603.50 0.672.433.362.30 99.65171958
 73.860.8012.773.43 0.702.283.622.46 99.93171958
 73.480.8112.472.93 0.562.073.782.55 98.63171958
 73.100.7612.533.14 0.632.223.702.36 98.44171958
 72.970.8012.683.35 0.652.443.802.27 98.97171958
 72.790.8412.903.66 0.732.723.722.24 99.59171958
 72.780.8812.743.41 0.642.623.772.45 100.29171958
 72.670.8412.703.54 0.752.713.752.27 99.22171958
 72.400.8212.583.36 0.692.423.992.34 98.59171958
 72.360.7212.563.28 0.682.313.622.32 97.84171958
 72.110.8612.723.84 0.812.743.702.29 99.06171958
 72.010.3114.383.59 0.282.144.762.54 100.01171958
 71.920.9712.933.84 0.792.843.772.39 99.44171958
 71.400.8612.513.35 0.682.463.722.28 97.25171958
 69.940.9013.224.26 0.893.153.482.14 97.97171958
FeO: total iron is represented as FeO
*original totals for normalised data (where applicable)

Instrument Conditions

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

 

References

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

1958: Pilcher, J., Bradley, R. S., Francus, P. and Anderson, L. (2005) A Holocene tephra record from the Lofoten Islands, Arctic Norway. Boreas  34, 136-156.

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 26/10/2021 at 22:20:19 local time, Edinburgh, Scotland, UK.