Hydrothermal alteration of magmatic titanite: Evidence from Proterozoic granitic rocks, Southeastern Sweden

Sadoon Morad, Mohamed A K El-Ghali, Miguel A. Caja, Khalid Al-Ramadan, Howri Mansurbeg

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)801-811
Number of pages11
JournalCanadian Mineralogist
Volume47
Issue number4
DOIs
Publication statusPublished - Aug 2009

Fingerprint

titanite
hydrothermal alteration
Proterozoic
Rocks
chlorite
rock
Ferrosoferric Oxide
Microporosity
Quartz
Calcium Carbonate
Dissolution
Fluxes
Crystalline materials
thin section
magnetite
biotite
calcite
replacement
dissolution
quartz

Keywords

  • Alteration
  • Granite
  • Hydrothermal process
  • Proterozoic
  • Sweden
  • Titanite

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Hydrothermal alteration of magmatic titanite : Evidence from Proterozoic granitic rocks, Southeastern Sweden. / Morad, Sadoon; El-Ghali, Mohamed A K; Caja, Miguel A.; Al-Ramadan, Khalid; Mansurbeg, Howri.

In: Canadian Mineralogist, Vol. 47, No. 4, 08.2009, p. 801-811.

Research output: Contribution to journalArticle

Morad, Sadoon ; El-Ghali, Mohamed A K ; Caja, Miguel A. ; Al-Ramadan, Khalid ; Mansurbeg, Howri. / Hydrothermal alteration of magmatic titanite : Evidence from Proterozoic granitic rocks, Southeastern Sweden. In: Canadian Mineralogist. 2009 ; Vol. 47, No. 4. pp. 801-811.
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