Boron isotopes in tourmaline as a tracer of metasomatic processes in the Bamble sector of Southern Norway
dc.contributor.author | Bast, R. | |
dc.contributor.author | Scherer, E. | |
dc.contributor.author | Mezger, K. | |
dc.contributor.author | Austrheim, H. | |
dc.contributor.author | Ludwig, T. | |
dc.contributor.author | Marschall, H. | |
dc.contributor.author | Putnis, Andrew | |
dc.contributor.author | Lowen, K. | |
dc.date.accessioned | 2017-01-30T13:50:35Z | |
dc.date.available | 2017-01-30T13:50:35Z | |
dc.date.created | 2015-04-23T03:53:27Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Bast, R. and Scherer, E. and Mezger, K. and Austrheim, H. and Ludwig, T. and Marschall, H. and Putnis, A. et al. 2014. Boron isotopes in tourmaline as a tracer of metasomatic processes in the Bamble sector of Southern Norway. Contributions to Mineralogy and Petrology. 168 (1069): pp. 1-21. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/35594 | |
dc.identifier.doi | 10.1007/s00410-014-1069-4 | |
dc.description.abstract |
The Bamble sector of southern Norway comprises metagabbros and metasediments that were metasomatically altered to various extents during a late stage of the Sveconorwegian orogeny (~1.06 Ga). The infiltration of highly saline brines along veins led to penetrative scapolitizationand albitization on a regional scale and the local deposition of Fe–Ti oxides. Typical secondary mineralassemblages include either scapolite + apatite + amphibole + phlogopite + tourmaline, or albite + epidote + calcite + chlorite + white mica, indicating that the fluids introduced large amounts of Na, Cl, Mg, Ca, K, P, and B to the system. Metasomatic tourmalines associated with different alteration stages as identified by variations in majorelement composition and initial 87Sr/86Sr were analyzedfor B isotopic compositions to constrain possible sources and the evolution of the hydrothermal fluid(s). Measured d11B values range from -5 to +27 ‰ relative to SRM-951, suggesting marine evaporites interlayered with various amounts of continental detritus and pelagic clay as a possible B source reservoir. The influence of a seawater-derived component is clearly indicated by the heavy B isotope signature of tourmaline related to Al–Mg-rich metapelites. In contrast, negative d11B values can be explained by the influence of pneumatolytic fluids associated with granitic pegmatites. On a regional scale (i.e., several km), d11B values in tourmaline vary widely, whereas variations within a single outcrop (tens of m) are typically small and can be ascribed to different generations of tourmaline related to several fluid pulses. | |
dc.publisher | Springer | |
dc.subject | Tourmaline | |
dc.subject | Metasomatism | |
dc.subject | Boron isotopes | |
dc.subject | Strontium isotopes | |
dc.subject | Fluid source | |
dc.subject | Bamble sector | |
dc.title | Boron isotopes in tourmaline as a tracer of metasomatic processes in the Bamble sector of Southern Norway | |
dc.type | Journal Article | |
dcterms.source.volume | 168 | |
dcterms.source.number | 1069 | |
dcterms.source.startPage | 1 | |
dcterms.source.endPage | 21 | |
dcterms.source.issn | 0010-7999 | |
dcterms.source.title | Contributions to Mineralogy and Petrology | |
curtin.accessStatus | Fulltext not available |