Article (Scientific journals)Géothermométrie par les pyroxènes et mise en place du massif anorthositique d'Egersund-Ogna (Rogaland, Norvège méridionale)
Maquil, Robert; Duchesne, Jean-Clair
1984 • In Annales de la Société Géologique de Belgique, 107, p. 27-49
Abstract :
[en] Microprobe analyses are presented of 62 orthopyroxene-clinopyroxene pairs from 17 samples from the Egersund-Ogna anorthositic body. Equilibrium temperatures, calculated by various opx-cpx geothermometers (Wood and Banno, 1973; Wells, 1977), as well as the Al-contents of the pyroxenes show relative variations. The interpretation is consistent with the crystallization of the anorthosite along a PT gradient and the syn-emplacement deformation of the mass itself together with its envelope.
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