TY - CHAP
T1 - Quaternary volcanism on Manus and M'buke Islands.
AU - Jaques, A. L.
PY - 1981
Y1 - 1981
N2 - Quaternary basalt is widely distributed around a caldera that forms Southwest Bay in SW Manus Island. The basalts are of transitional to mildly alkaline composition, rich in TiO2, Zr, Nb, and light rare-earth elements, and resemble the incompatible-element-enriched tholeiites of oceanic islands such as Hawaii and Iceland. A change from island-arc (plate-boundary) igneous activity in the Tertiary to ocean-island-type (intraplate) volcanism in the Quaternary, reflects a striking change in tectonic setting thought to have resulted from left-lateral translation of Manus Island and New Ireland past New Britain. The Quaternary intraplate volcanism of Southwest Bay, M'Buke and Johnstone Islands, and the St Andrew Strait Islands may be controlled by a NW-trending fracture system, but alternatively may represent a 'hot spot' trace.-Author
AB - Quaternary basalt is widely distributed around a caldera that forms Southwest Bay in SW Manus Island. The basalts are of transitional to mildly alkaline composition, rich in TiO2, Zr, Nb, and light rare-earth elements, and resemble the incompatible-element-enriched tholeiites of oceanic islands such as Hawaii and Iceland. A change from island-arc (plate-boundary) igneous activity in the Tertiary to ocean-island-type (intraplate) volcanism in the Quaternary, reflects a striking change in tectonic setting thought to have resulted from left-lateral translation of Manus Island and New Ireland past New Britain. The Quaternary intraplate volcanism of Southwest Bay, M'Buke and Johnstone Islands, and the St Andrew Strait Islands may be controlled by a NW-trending fracture system, but alternatively may represent a 'hot spot' trace.-Author
UR - http://www.scopus.com/inward/record.url?scp=0019645393&partnerID=8YFLogxK
M3 - Chapter
AN - SCOPUS:0019645393
T3 - Cooke-Ravian Volume of Volcanological Papers
SP - 213
EP - 219
BT - Cooke-Ravian Volume of Volcanological Papers, Geological Survey of Papua New Guinea Memoirs
PB - Geological Survey of Papua New Guinea
CY - Port Moresby
ER -