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Hydrothermal alteration of magmatic titanite: Evidence from Proterozoic granitic rocks, Southeastern Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
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2009 (English)In: Canadian Mineralogist, ISSN 0008-4476, E-ISSN 1499-1276, Vol. 47, no 4, 801-811 p.Article in journal (Refereed) Published
Abstract [en]

Magmatic titanite in Proterozoic granitic rocks from southeastern Sweden has been subjected to hydrothermal dissolution and replacement by finely crystalline Fe-dominant chlorite and TiO2 (± quartz ± calcite). These alteration patterns require the redistribution of the highly immobile Ti and At on the thin-section scale. The chloritization of titanite involved the formation of an intermediate Al-Fe-rich phase probably comprising intimately intergrown, submicroscopic chlorite and titanite. The creation of microporosity by the hydrothermal alteration of titanite may enhance the diffusive flux of matter, and hence the rate of reactions in granitic rocks. The alteration of titanite is most pronounced in red-stained granitic rock zones enriched in partly dissolved biotite and magnetite, which could have acted as local source of Al, Fe and Mg needed for chlorite formation.

Place, publisher, year, edition, pages
2009. Vol. 47, no 4, 801-811 p.
Keyword [en]
titanite, alteration, hydrothermal process, granite, Proterozoic, Sweden
National Category
Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
URN: urn:nbn:se:uu:diva-119815DOI: 10.3749/canmin.47.4.801ISI: 000269726000006OAI: oai:DiVA.org:uu-119815DiVA: diva2:301020
Available from: 2010-03-02 Created: 2010-03-02 Last updated: 2011-03-04Bibliographically approved

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