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Titolo:
Recognition of active strike-slip faulting from high-resolution marine seismic reflection profiles: Eastern Marlborough fault system, New Zealand
Autore:
Barnes, PM; Audru, JC;
Indirizzi:
Natl Inst Water & Atmospher Res, Wellington, New Zealand Natl Inst Water &Atmospher Res Wellington New Zealand ton, New Zealand Univ Nice, UMR Geosci Azur, F-06560 Valbonne, France Univ Nice Valbonne France F-06560 Geosci Azur, F-06560 Valbonne, France
Titolo Testata:
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
fascicolo: 4, volume: 111, anno: 1999,
pagine: 538 - 559
SICI:
0016-7606(199904)111:4<538:ROASFF>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLATE-BOUNDARY ZONE; NORTHERN SOUTH-ISLAND; HOPE FAULT; OBLIQUE SUBDUCTION; FOCAL MECHANISMS; HIKURANGI MARGIN; WRENCH FAULTS; PACIFIC; TRANSPRESSION; STRAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
62
Recensione:
Indirizzi per estratti:
Indirizzo: Barnes, PM Natl Inst Water & Atmospher Res, POB 14901, Wellington, New Zealand Natl Inst Water & Atmospher Res POB 14901 Wellington New Zealand
Citazione:
P.M. Barnes e J.C. Audru, "Recognition of active strike-slip faulting from high-resolution marine seismic reflection profiles: Eastern Marlborough fault system, New Zealand", GEOL S AM B, 111(4), 1999, pp. 538-559

Abstract

Major strike-slip faults within the eastern part of the Marlborough fault system of New Zealand extend offshore beneath the continental shelf, into the southern end of the Hikurangi margin. Six major submarine faults, each tens of kilometers in length and exhibiting the three-dimensional structuralcharacteristics typical of strike-slip deformation zones, are mapped in detail using closely spaced high-resolution seismic-reflection profiles. Eachfault displaces late Quaternary sediments that have been interpreted within the framework of the sequence stratigraphic model and the established history of glacio-eustatic sea-level cyclicity. Some of the faults are associated with strike-slip microearthquake focal mechanisms. The faults are within a complex structural high that underlies much of theouter continental shelf, and within the Flaxbourne basin between the structural high and the coast. The plan-view pattern of faulting recorded in theQuaternary sediments reflects only the major surface traces that have propagated upsection as contemporaneous sedimentation has blanketed most of theevolving structures, Regionally, the late Quaternary faults compose two groups that bound blocks with rhomboid surface areas on a scale of tens of square kilometers to hundreds of square kilometers, One group strikes typically between 023 degrees and 057 degrees, i.e., 22 degrees-56 degrees from the plate motion vector (079 degrees), and includes dextral, oblique-slip thrust faults as well as inherited, steeply dipping, pre-Pliocene strike-slip faults that bound thick sedimentary basins, The second group comprises possibly young (<1 Ma), steeply dipping strike-slip faults that commonly exhibit normal-slip separation, and strike between 067 degrees and 085 degrees, subparallel to the azimuth of the instantaneous Pacific-Australian plate motion vector.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 10:25:26