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Geofluids
Volume 2018, Article ID 9325809, 22 pages
https://doi.org/10.1155/2018/9325809
Research Article

Dynamic Metasomatism: Stable Isotopes, Fluid Evolution, and Deformation of Albitite and Scapolite Metagabbro (Bamble Lithotectonic Domain, South Norway)

1Geological Survey of Norway, P.O. Box 6315 Torgard, 7491 Trondheim, Norway
2Department of Geosciences, University of Tübingen, Wilhelmstr. 56, 72074 Tübingen, Germany
3Department of Geosciences, University of Oslo, P.O. Box 1047 Blindern, 0316 Oslo, Norway

Correspondence should be addressed to Ane K. Engvik; on.ugn@kivgne.ena

Received 22 June 2017; Revised 21 October 2017; Accepted 4 December 2017; Published 17 January 2018

Academic Editor: Daniel E. Harlov

Copyright © 2018 Ane K. Engvik et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

New stable isotopic data from mineral separates of albite, scapolite, amphibole, quartz, and calcite of metasomatic rocks (Bamble lithotectonic domain) give increased knowledge on fluid type, source, and evolution during metamorphism. Albite from a variety of albitites gives δ18 values of 5.1–11.1, while quartz from clinopyroxene-bearing albitite gives 11.5–11.6. δ18 values for calcite samples varies between 3.4 and 12.4 and shows more consistent δ13C values of −4.6 to . Amphibole from scapolite metagabbro yields a δ18 value of 4.3 to 6.7 and δ value of −84 to −50, while the scapolite gives δ18 values in the range of 7.4 to . These results support the interpretation that the original magmatic rocks were metasomatised by seawater solutions with a possible involvement from magmatic fluids. Scapolitisation and albitisation led to contrasting chemical evolution with respect to elements like P, Ti, V, Fe, and halogens. The halogens deposited as Cl-scapolite were dissolved by albitisation fluid and reused as a ligand for metal transport. Many of the metal deposits in the Bamble lithotectonic domain, including Fe-ores, rutile, and apatite deposits formed during metasomatism. Brittle to ductile deformation concurrent with metasomatic infiltration illustrates the dynamics and importance of metasomatic processes during crustal evolution.