TY - JOUR
T1 - Precambrian intraplate magmatism: high temperature low pressure granulites.
AU - Touret, J.L.R.
AU - Huizenga, J.M.
PY - 1999
Y1 - 1999
N2 - Starting from the hypothesis that the lower continental crust is dominated by granulites, some essential features of granulites are recalled. Two general P-T-t paths are possible, clockwise and anticlockwise, of which the former is more common for high pressure granulites, the latter for low pressure granulites. For high temperature, low pressure granulites, granulite metamorphism appears to be a discrete event, caused by a sudden temperature increase in a more or less thickened crust. The complex granulite chemistry, characterised by the possible mobility of some elements (LILE, Ti), as well as the P-T-t evolution, are explained by two complementary mechanisms operating simultaneously in different domains and at a variable scale: fluid-absent melting and fluid-assisted metamorphism (high salinity aqueous fluid and high density CO
AB - Starting from the hypothesis that the lower continental crust is dominated by granulites, some essential features of granulites are recalled. Two general P-T-t paths are possible, clockwise and anticlockwise, of which the former is more common for high pressure granulites, the latter for low pressure granulites. For high temperature, low pressure granulites, granulite metamorphism appears to be a discrete event, caused by a sudden temperature increase in a more or less thickened crust. The complex granulite chemistry, characterised by the possible mobility of some elements (LILE, Ti), as well as the P-T-t evolution, are explained by two complementary mechanisms operating simultaneously in different domains and at a variable scale: fluid-absent melting and fluid-assisted metamorphism (high salinity aqueous fluid and high density CO
U2 - 10.1016/S0899-5362(99)00010-X
DO - 10.1016/S0899-5362(99)00010-X
M3 - Article
SN - 1464-343X
VL - 28
SP - 367
EP - 382
JO - Journal of African Earth Sciences
JF - Journal of African Earth Sciences
IS - 2
ER -