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Bikpela: A large siliceous chimney from the PACMANUS hydrothermal field, Manus basin, Papua New Guinea

Binns, Raymond


The 2.7 m Bikpela chimney differs from sulfide-rich chimneys at PACMANUS, eastern Manus basin, by virtue of high silica content, a stromatolite-like layered structure, and the presence of a large internal collapse cavity. Its interior is dominated by 5-to 10-mm-thick primary laminae of opal-A-dominated fronds clouded by submicroscopic sphalerite inclusions, set between thin subhorizontal growth borders. Larger sphalerites with sulfosalt-galena intergrowths at frond ends project into discoid...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Economic Geology; Bulletin of the Society of Economic Geologists


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