Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, Southeast Norway. IV. Fluid inclusions in the Sande nordmarkite.
dc.contributor.author | Andersen, Tom | |
dc.coverage.spatial | 18143 Drammen | |
dc.date.accessioned | 2020-08-26T09:11:30Z | |
dc.date.available | 2020-08-26T09:11:30Z | |
dc.date.issued | 1990 | |
dc.identifier.uri | https://hdl.handle.net/11250/2674257 | |
dc.description.abstract | The mildly peralkaline Sande nordmarkite (quartz syenite) intrusion contains interstitial quartz and mafic minerals (alkali amphibloe, ilmenite, titanomagnetite, zirkon, sphene + calcite). Three generations of fluid inclusions have been recognized in the interstitial quartz: primary inclusions (population), early secondary inclusions (population 2) and late secondary inclusions (population 3). Population 1 and 2 inclusions contain fluids which can be approximated by the H2O-NaCl system, and were probably derived from the magma. The salinity of these fluids is ca. 40 wt% NaCl, but the fluidsd show a considerable variation in density (d = 0.9 to > 1.1 g\/cm3), increasing with time and decreasing temperature. Population 3 fluids show complex immiscibility relationships involving vapour, highly saline liquids and solid salts. Also, low-salinity, high-density fluids of external origin become important at this stage. | |
dc.language.iso | eng | |
dc.relation.ispartofseries | NGU Bulletin (417) | |
dc.rights | Navngivelse 4.0 Internasjonal | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | |
dc.subject | GRANITT | |
dc.subject | PETROLOGI | |
dc.title | Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, Southeast Norway. IV. Fluid inclusions in the Sande nordmarkite. | |
dc.type | Journal article | |
dc.description.localcode | 35697 | |
dc.source.pagenumber | 41-54 |
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