Devonian lavas from Solund, West Norway - field relationships and geochemistry.

dc.contributor.author	Furnes, Harald
dc.contributor.author	Lippard, Stephen John
dc.coverage.spatial	11173 Solund
dc.date.accessioned	2020-08-26T13:24:01Z
dc.date.available	2020-08-26T13:24:01Z
dc.date.issued	1983
dc.identifier.uri	https://hdl.handle.net/11250/2675162
dc.description.abstract	Devonian volcanic rocks in the Hersvik area, Solund, West Norway are represented by two lava flows occuring close to the base of the Devonian conglomerate. They are composed largely of highly flow-banded and brecciared material. The lavas are of intermediate to acidic composition, the lower flow is trachytic (61-63% SiO2) and the upper one rhyolitic (67-70% SiO2). They were strongly altered by hydration and oxidation, probably mainly as a result of hydrothermal activity. Incompatible trace element abundances are very high, and of the same magnitude as in perkaline acidic rocks, suggesting a contonental rift environment for the Hersvik area.
dc.language.iso	eng
dc.relation.ispartofseries	NGU (382)
dc.rights	Navngivelse 4.0 Internasjonal
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/deed.no
dc.subject	GEOKJEMI
dc.subject	TEKTONIKK
dc.subject	PETROGRAFI
dc.subject	DEVON
dc.subject	OMDANNING
dc.subject	DAGBERGART
dc.title	Devonian lavas from Solund, West Norway - field relationships and geochemistry.
dc.type	Journal article
dc.description.localcode	35273
dc.source.pagenumber	1-15

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