Geologiske Guider

Geologiske Guider

Bilde
NORWEGIAN PEGMATITES I: Tysfjord-Hamarøy, Evje-Iveland, Langesundsfjord
Guide NR
Guide 6-2017
Title
NORWEGIAN PEGMATITES I: Tysfjord-Hamarøy, Evje-Iveland, Langesundsfjord
ISBN
978-82-8347-020-8
Levels geological guides
Level 3
Front cover illustrations
Axel Müller - 'Iveland Wall' in Iveland showing partiol melting of amphibolites and the related formation of pegmatites.
Description

This guide has been prepared for the geological excursions related to the 8th International Symposium on Granitic Pegmatites PEG2017 held at the University of Agder in Kristiansand, south Norway, from the 13th of June to the 15th of June 2017.

The guide contains detailed information about the preconference excursion (9th to 13th of June 2017) to the Tysfjord-Hamarøy pegmatite field in Nordland (chapter 1) and the post-conference excursion (16th to 19th of June 2017) to pegmatites of the Evje-Iveland (chapter 2) and Langesundsfjord (chapter 3) areas.

The series of International Symposia on Granitic Pegmatites (PEG) started in 2003, is biennial and collects geoscientists, mining and processing engineers, mineral and gemstone dealers from all over the world. The participants have one study subject in common: Pegmatites.

Pegmatite is defined as a very coarse-grained rock (with crystal sizes >2 cm) of magmatic origin. Pegmatites are economically important sources of a number of rare elements including lithium, caesium, rubidium, niobium, tantalum, beryllium, and Rare Earth Elements (REE), as well as the industrial minerals K-feldspar, Na-feldspar, quartz and mica. Niobium, beryllium and REE are classified as critical materials by the European Commission, meaning these are raw materials that are crucial to Europe’s and the World’s economy and essential for maintaining and improving the quality of life.

Pegmatite research, mining and processing has a 150- year long tradition in Norway and, in addition to the historically widespread mining of feldspar, quartz and mica, it also resulted in for example the establishment of the Porsgrund Porselænsfabrik AS in 1885 and of the high-purity quartz producer Norwegian Crystallites in 1996 (since 2011 The Quartz Corp). The scientific study of Norwegian pegmatites started at the turn of the 19th and 20th century with the famous work of Waldemar C. Brøgger about the mineralogy of the Permian syenite pegmatites from Langesundsfjord (Brøgger 1890) and the Mesoproterozoic pegmatites in southern Norway (Brøgger 1906, 1922).

This field trip guide summarizes the current knowledge on pegmatites from the Tysfjord-Hamarøy, Evje-Iveland and Langesundsfjord areas and provides the reader with the latest results of their investigation.

Map
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AkerBPsvarthvit NGUlitenfarge
ngi logo svarthvit statoillogo svarthvit
sandvik-logo svarthvit dongenergy
Lundin svarthvit ranagruber svarthvit
 
od svarthvit logo visneskalk