Mineralogy and geochemistry of pegmatites in the Larvik Plutonic Complex, Norway
Appears in the following Collection
- Naturhistorisk museum 
AbstractPeculiar rocks consisting of large and rare minerals are known as nepheline syenite pegmatites and can be found in larvikite (national rock of Norway!) around the Larvik area. Detailed chemical analyses of a mineral called wöhlerite, which is rare on the global scale but common in the pegmatites, reveal a close relationship of the pegmatites to the host larvikite. These pegmatites have a unique internal structure of mineral distribution, and may be distinguished based on their mineral assemblages. Boron isotopic composition of tourmaline and hambergite reveal that external fluids have interacted with the early melt. Such boron isotope data is particular interesting for the research community, because they represent a unique geochemical system where boron isotopes are poorly studied. Furthermore, this study developed hambergite as a new host for boron isotopes. Studies of how these pegmatites form is important scientifically to develop our understanding of these geological systems, and commercially because this group of rocks are potential sources for important strategic elements.
List of papers
|Paper I: Variation in major and trace elements of primary wöhlerite as indicator for origin of pegmatites in the Larvik plutonic complex, Norway. Øyvind Sunde, Henrik Friis, and Tom Andersen. The Canadian Mineralogist 56, 529-542. The paper is not available in DUO due to publisher restrictions. The published version is available at: https://doi.org/10.3749/canmin.1700050|
|Paper II: Pegmatites of the Larvik plutonic complex, Oslo rift, Norway: Field relations and characterization. Øyvind Sunde, Henrik Friis, and Tom Andersen Norwegian Journal of Geology 99. The article is included in the thesis. The published article is also available at: https://doi.org/10.17850/njg99-1-05|
|Paper III: Boron isotope composition of coexisting tourmaline and hambergite in alkaline and granitic pegmatites. Øyvind Sunde, Henrik Friis, Tom Andersen, Robert B. Trumbull, Michael Wiedenbeck, Peter Lyckberg, Samuele Agostini, William H. Casey, and Ping Yu. To be published. The paper is not available in DUO awaiting publishing.|