Petrography and geochemistry of the Cape Hoskins volcanoes, New Britain, Papua New Guinea
作者:
D. H. Blake,
A. Ewart,
期刊:
Journal of the Geological Society of Australia
(Taylor Available online 1974)
卷期:
Volume 21,
issue 3
页码: 319-331
ISSN:0016-7614
年代: 1974
DOI:10.1080/00167617408728854
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The Cape Hoskins volcanoes form part of the Quaternary volcanic island arc that extends from Rabaul in the east to the Schouten Islands in the west, and they overlie the northerly dipping New Britain Benioff Zone. The products of the volcanoes range in composition from basalt to rhyolite, and are normative in quartz and hypersthene. They contain phenocrysts of plagioclase and subordinate augite, hypersthene, and in most samples iron‐titanium oxides; some samples also contain olivine or quartz or both, and some pumice contains hornblende and, rarely, biotite.
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