Conference Proceedings
PNG Geology, Exploration and Mining Conference, Lae, PNG, June 1994
Conference Proceedings
PNG Geology, Exploration and Mining Conference, Lae, PNG, June 1994
High temperature amphiboles in the metamorphic aureole of the Papuan Ophiolite, Papua New Guinea
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 >800C at the peridotite
contact. The zonation is recorded in Ti
content and A-site occupancy, relative
to Al'
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 >800C at the peridotite
contact. The zonation is recorded in Ti
content and A-site occupancy, relative
to Al'
Contributor(s):
W Y Lus
-
SubscribeHigh temperature amphiboles in the metamorphic aureole of the Papuan Ophiolite, Papua New GuineaPDFThis product is exclusive to Digital library subscription
-
Add to cartHigh temperature amphiboles in the metamorphic aureole of the Papuan Ophiolite, Papua New GuineaPDFNormal price $22.00Member price from $0.00
Fees above are GST inclusive
PD Hours
Approved activity
- Published: 1994
- PDF Size: 0.459 Mb.
- Unique ID: P199402013