The Geological and Tectonic Evolution of Feni, Papua New Guinea

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aut.relation.articlenumber257
aut.relation.issue9
aut.relation.journalGeosciences
aut.relation.startpage257
aut.relation.volume13
dc.contributor.authorPonyalou, OL
dc.contributor.authorPetterson, MG
dc.contributor.authorEspi, JO
dc.date.accessioned2023-10-20T03:06:59Z
dc.date.available2023-10-20T03:06:59Z
dc.date.issued2023-08-24
dc.description.abstractFeni is located at the southeastern end of the NW-trending Tabar–Lihir–Tanga–Feni (TLTF) volcanic island chain, in northeastern Papua New Guinea. This island chain is renowned for hosting alkaline volcanics, geothermal activity, copper–gold mineralization, and mining. There is no agreed consensus on the tectonic and petrogenetic evolution of Feni. Thus, the purpose of our paper is to present the geology of Feni within the context of the regional tectonic evolution of the TLTF chain and offer a succinct and generic geodynamic model that sets the stage for our next paper. The methodologies used in this study include a critical review of published and unpublished literature in conjunction with our geological observations on Feni. The Pliocene-to-Holocene TLTF chain is a younger arc situated within the greater Eocene-to-Oligocene Melanesian Arc bounded by New Ireland to the west, the Kilinailau Trench and Ontong Java Plateau in the east, and the New Britain Trench to the south. The geological units mapped on Feni include a large volume of basaltic lava flow and trachyandesite stocks intruding a limestone and siltstone basement. Younger units include the trachyte domes, pyroclastic flow, and ash fall deposits. The major structures on Feni are normal or extensional faults such as the Niffin Graben. Feni magmatism is attributed to the petrogenetic processes of polybaric or decompression melting and crystal fractionation of magmas previously influenced by sediment assimilation, mantle wedge metasomatism, slab tears, slab melts, and subduction. Deep lithospheric normal faults provide the fluid pathways for the Feni alkaline magmas.
dc.identifier.citationGeosciences, ISSN: 2076-3263 (Print); 2076-3263 (Online), MDPI, 13(9), 257-. doi: 10.3390/geosciences13090257
dc.identifier.doi10.3390/geosciences13090257
dc.identifier.issn2076-3263
dc.identifier.issn2076-3263
dc.identifier.urihttp://hdl.handle.net/10292/16806
dc.publisherMDPI
dc.relation.urihttps://www.mdpi.com/2076-3263/13/9/257
dc.rights.accessrightsOpenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject37 Earth Sciences
dc.subject3703 Geochemistry
dc.subject3705 Geology
dc.subject3706 Geophysics
dc.subject0403 Geology
dc.subject0907 Environmental Engineering
dc.subject0909 Geomatic Engineering
dc.subject3705 Geology
dc.subject3706 Geophysics
dc.titleThe Geological and Tectonic Evolution of Feni, Papua New Guinea
dc.typeJournal Article
pubs.elements-id526688
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