High temperature amphiboles in the metamorphic aureole of the Papuan Ophiolite, Papua New Guinea
- Organization:
- The Australasian Institute of Mining and Metallurgy
- Pages:
- 6
- File Size:
- 482 KB
- Publication Date:
- Jan 1, 1994
Abstract
A narrow (200-300m) zone of amphibolite facies metamorphic rocks underlies the Papuan ophiolite near the Musa-Kumusi divide, SW of Popondetta, Oro Province. The amphibolite rocks are bounded up-section, to the NE, by peridotite and gabbro of the ophiolite; and down-section, to the SW, by mafic greenschist, which in turn overlies blueschist facies mafic schists of the Emo Metamorphics.Amphibole compositions within the narrow contact zone show a strong chemical zonation which reflects a steep thermal gradient, with maximum temperatures >800¦C at the peridotite contact. The zonation is recorded in Ti content and A-site occupancy, relative to Al'¦
Citation
APA: (1994) High temperature amphiboles in the metamorphic aureole of the Papuan Ophiolite, Papua New Guinea
MLA: High temperature amphiboles in the metamorphic aureole of the Papuan Ophiolite, Papua New Guinea. The Australasian Institute of Mining and Metallurgy, 1994.