Journal ArticleDOI
Geology of the Rakiraki district, Viti Levu, Fiji
J. B. Seeley,E. J. Searle +1 more
TLDR
The area west and south-west of Rakiraki, Fiji is composed of basaltic and andesitic flows, fragmental and pillow lavas intruded by andesite plugs, a gabbro pluton, and dikes as mentioned in this paper.Abstract:
The area west and south-west of Rakiraki, Fiji, is composed of basaltic and andesitic flows, fragmental and pillow lavas intruded by andesitic plugs, a gabbro pluton, and andesitic dikes. The area was a major volcanic centre in Pliocene-Pleistocene times. The stratigraphy and petrology are discussed.read more
Citations
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Journal ArticleDOI
Early rifting of an oceanic island arc (Fiji) produced shoshonitic to tholeiitic basalts
James B. Gill,Peter M. Whelan +1 more
TL;DR: In this article, three shoshonitic suites are distinguished based on differentiation-normalized alkali contents, but K-Rb-Ba-Sr, P-rare earth element (REE), and Ti-Zr-Hf enrichments occur independent of each other.
Book ChapterDOI
Temper Sands in Prehistoric Oceanian Pottery: Geotectonics, Sedimentology, Petrography, Provenance
Journal ArticleDOI
Characteristics and origin of peperite involving coarse-grained host sediment
TL;DR: Peperite involving basalt and polymictic volcanic conglomerate occurs in the Pliocene Ba Volcanic Group at Yaqara in northern Viti Levu, Fiji as mentioned in this paper.
Journal ArticleDOI
Volcano-tectonic evolution of Fiji and adjoining marginal basins
H. Colley,W. H. Hindle +1 more
TL;DR: In this article, a compressive event followed by progressive isolation from a subduction regime as arc segments were rotated away from the region led to asthenospheric melting with a decreasing subduction component, and a consequent change in Fiji volcanism from arc andesites and tholeiites to alkalic ocean island basalts.
Journal ArticleDOI
Petrography and geologic provenance of sand tempers in prehistoric potsherds from Fiji and Vanuatu, South Pacific
TL;DR: In this article, the authors have found evidence for prehistoric ceramic transfer between Vanuatu and Fiji, but there is as yet no temper evidence for such transfer between islands of origin.
References
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Journal ArticleDOI
Average chemical compositions of some igneous rocks
TL;DR: In this paper, the average chemical compositions for the common plutonic rock types and their volcanic equivalents are given for the general average chemical composition of silicic, intermediate, subsilicic and ultramafic igneous rocks.
Journal ArticleDOI
The Petrology of Thingmuli, a Tertiary Volcano in Eastern Iceland
TL;DR: The Tertiary flood-basalt sequence of eastern Iceland is intermittently disturbed by central volcanic activity with the voluminous eruption of acid magma as mentioned in this paper, which produces a swarm of acid and basic dykes and extensive superimposed hydrothermal alteration.
Journal ArticleDOI
Proposed classification of volcaniclastic sediments and rocks
TL;DR: In this paper, the authors classified volcanic sediments and rocks into three classes: autoclastic, pyroclastic, and epiclastic, with grain-size limits the same as non-volcanic volcanic rocks.
Journal ArticleDOI
Pahoehoe, aa, and block lava
TL;DR: Macdonald as discussed by the authors describes the surface features and cross-sections of pahoehoe and aa and concludes that aa has the same chemistry and viscosity as aa, but has lost gas, such that agitation or stirring of the lava is important in effecting the transition from aa to aa.