TY - JOUR
T1 - Hydrothermal alteration of magmatic titanite
T2 - Evidence from Proterozoic granitic rocks, Southeastern Sweden
AU - Morad, Sadoon
AU - El-Ghali, Mohamed A.K.
AU - Caja, Miguel A.
AU - Al-Ramadan, Khalid
AU - Mansurbeg, Howri
PY - 2009/8
Y1 - 2009/8
N2 - 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.
AB - 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.
KW - Alteration
KW - Granite
KW - Hydrothermal process
KW - Proterozoic
KW - Sweden
KW - Titanite
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U2 - 10.3749/canmin.47.4.801
DO - 10.3749/canmin.47.4.801
M3 - Article
AN - SCOPUS:70350180095
SN - 0008-4476
VL - 47
SP - 801
EP - 811
JO - Canadian Mineralogist
JF - Canadian Mineralogist
IS - 4
ER -