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Titolo:
Deformation processes in the shallow levels of an accretionary prism: The mesozoic Torlesse Terrane, South Usland, New Zealand
Autore:
Kano, KI; Konishi, Y;
Indirizzi:
Shizuoka Univ, Inst Geosci, Shizouka 4228529, Japan Shizuoka Univ Shizouka Japan 4228529 nst Geosci, Shizouka 4228529, Japan Japan Natl Oil Corp, Chiyoda Tokyo 1008511, Japan Japan Natl Oil Corp Chiyoda Tokyo Japan 1008511 oda Tokyo 1008511, Japan
Titolo Testata:
ISLAND ARC
fascicolo: 2, volume: 10, anno: 2001,
pagine: 158 - 174
SICI:
1038-4871(200106)10:2<158:DPITSL>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLATE-BOUNDARY ZONE; NORTH-ISLAND; ILLITE CRYSTALLINITY; SHIMANTO BELT; ROCKS; JAPAN; SUBDUCTION; COMPLEX; WELLINGTON; EVOLUTION;
Keywords:
accretionary prism; deformation sequence; New Zealand; structural geology; Torlesse Terrane;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Kano, KI Shizuoka Univ, Inst Geosci, Shizouka 4228529, Japan Shizuoka Univ Shizouka Japan 4228529 i, Shizouka 4228529, Japan
Citazione:
K.I. Kano e Y. Konishi, "Deformation processes in the shallow levels of an accretionary prism: The mesozoic Torlesse Terrane, South Usland, New Zealand", ISL ARC, 10(2), 2001, pp. 158-174

Abstract

The deformation style of the Torlesse Terrane along the southern Kaikoura coast, South Island, New Zealand, records shallow level deformation processes within an accretionary prism during the Early Cretaceous. The beds exhibit complicated structural features resulting from multistage deformations in a lithological unit, that were intimately related with the dewatering andlithification of terrigenous sediments. The earliest phase of deformation throughout the transect studied was the development of pinch-and-swell structures and boudinage fabrics due to layer-parallel extension while the bedswere poorly consolidated. This was followed locally by mesoscopic tight toclose recumbent folding. The beds are cut locally by two phases of mudstone intrusions. The earlier phase was initiated by 'in situ' fluidization of mudstone layers, whereas the later phase represented intrusion of siliceousclaystone probably derived from an overpressured decollement. Minor faultsat high-angles to bedding by layer-normal shortening then disrupted the beds throughout the transect. The deformation was followed by formation of meso- and macroscopic scale open to gentle folds by layer-parallel shortening. Kilometer-scale differential stratal rotations were produced during the final main tectonic phase that occurred in association with post-accretion Neogene regional disturbance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 12:03:31