dc.contributor.author | Andersen, Tom | |
dc.contributor.author | Sørensen, Henning | |
dc.coverage.spatial | 17131 Siljan | |
dc.date.accessioned | 2020-08-26T09:02:55Z | |
dc.date.available | 2020-08-26T09:02:55Z | |
dc.date.issued | 2003 | |
dc.identifier.uri | https://hdl.handle.net/11250/2674102 | |
dc.description.abstract | A small body of trachyte or microsyenite cropping out east of lake Mykle in the Vestfold Graben of the Oslo Rift probably represents a subvolcanic intrusion emplaced at a fairly early stage of the intrusive history of the Siljan-Mykle area. The microsyenite shows chemical, petrographical and mineralogical features intermediate between larvikite and nordmarkite, suggesting that it represents a transitional magma type. The microsyenite shows pyroxene zonation patterns indicating a discontinous, two-stage crystallization history, whose initial stage resembles that observed in normal larvikite. At the final stage of pyroxene growth, the melt had developed to a more alkaline composition, resembling some of the less alkaline (alkali) syenites in the rift. | |
dc.language.iso | eng | |
dc.relation.ispartofseries | NGU Bulletin (441) | |
dc.rights | Navngivelse 4.0 Internasjonal | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | |
dc.subject | LARVIKITT | |
dc.subject | PETROLOGI | |
dc.subject | SYENITT | |
dc.title | Microsyenite from Lake Mykle, Oslo Rift: Subvolcanic rocks transitional between larvikite and nordmarkite | |
dc.type | Journal article | |
dc.description.localcode | 50691 | |
dc.source.pagenumber | 25-31 | |