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The Tectonic Evolution of Pegasus Basin and the Hikurangi Trench, Offshore New Zealand.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	The Tectonic Evolution of Pegasus Basin and the Hikurangi Trench, Offshore New Zealand./
Author:	King, Sarah E.
Description:	1 online resource (92 pages)
Notes:	Source: Masters Abstracts International, Volume: 56-04.
Subject:	Geology. -
Online resource:	click for full text (PQDT)
ISBN:	9781369859232

The Tectonic Evolution of Pegasus Basin and the Hikurangi Trench, Offshore New Zealand.
King, Sarah E.

The Tectonic Evolution of Pegasus Basin and the Hikurangi Trench, Offshore New Zealand. - 1 online resource (92 pages)

Source: Masters Abstracts International, Volume: 56-04.

Thesis (M.S.)--Colorado School of Mines, 2017.

Includes bibliographical references

The Pegasus Basin overlies part of the tectonic transition between oblique southwest subduction of the Pacific Plate below the East Coast of the North Island of New Zealand, and the strike-slip faulting that dominates the majority of the South Island of New Zealand. The transition from this strike-slip zone into the actively subducting Hikurangi Trench requires a significant translation of plate motion from margin parallel to margin normal within the Pegasus Basin. The purpose of this research was to understand the distribution of strain along this complex transition, and to identify how shortening is manifested on structures through time. The different stress regimes along the coast may correspond to different shortening amounts absorbed on a variety of structures that translate strain accommodation through the major tectonic transition from compressional subduction to strike-slip displacement. Interpretations of 2D seismic profiles guided by models of margins with comparable tectonic settings ensure geologically restorable interpretations and reasonable shortening values within this transition zone. Restorations of depth converted seismic cross sections constrain ages of the faults and establish controls on their timing and activation. Complexities such as a rotating forearc, a southern migrating subduction zone, and a strike-slip zone further complicate restorations past the late Pliocene-Quaternary aged sediments. Shortening values acquired from restorations align with shortening values from other studies in the area, and also align with estimates based off of the current plate motion vector movement. Economic interest in the Pegasus Basin is primarily petroleum based. Though the basin has not been tested, active seeps, pockmarks, gas chimneys, and surface slicks are numerous within the Pegasus Basin. Structural interpretation, and modelling of potential hydrocarbon accumulations and the implied fluid pathways impact the feasibility of exploration and development of hydrocarbons in the Pegasus Basin.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369859232Subjects--Topical Terms:

670379
Geology.
Index Terms--Genre/Form:

554714
Electronic books.

The Tectonic Evolution of Pegasus Basin and the Hikurangi Trench, Offshore New Zealand.
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245 1 4 $a The Tectonic Evolution of Pegasus Basin and the Hikurangi Trench, Offshore New Zealand.
264 0 $c 2017
300 $a 1 online resource (92 pages)
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500 $a Source: Masters Abstracts International, Volume: 56-04.
500 $a Adviser: Bruce Trudgill.
502 $a Thesis (M.S.)--Colorado School of Mines, 2017.
504 $a Includes bibliographical references
520 $a The Pegasus Basin overlies part of the tectonic transition between oblique southwest subduction of the Pacific Plate below the East Coast of the North Island of New Zealand, and the strike-slip faulting that dominates the majority of the South Island of New Zealand. The transition from this strike-slip zone into the actively subducting Hikurangi Trench requires a significant translation of plate motion from margin parallel to margin normal within the Pegasus Basin. The purpose of this research was to understand the distribution of strain along this complex transition, and to identify how shortening is manifested on structures through time. The different stress regimes along the coast may correspond to different shortening amounts absorbed on a variety of structures that translate strain accommodation through the major tectonic transition from compressional subduction to strike-slip displacement. Interpretations of 2D seismic profiles guided by models of margins with comparable tectonic settings ensure geologically restorable interpretations and reasonable shortening values within this transition zone. Restorations of depth converted seismic cross sections constrain ages of the faults and establish controls on their timing and activation. Complexities such as a rotating forearc, a southern migrating subduction zone, and a strike-slip zone further complicate restorations past the late Pliocene-Quaternary aged sediments. Shortening values acquired from restorations align with shortening values from other studies in the area, and also align with estimates based off of the current plate motion vector movement. Economic interest in the Pegasus Basin is primarily petroleum based. Though the basin has not been tested, active seeps, pockmarks, gas chimneys, and surface slicks are numerous within the Pegasus Basin. Structural interpretation, and modelling of potential hydrocarbon accumulations and the implied fluid pathways impact the feasibility of exploration and development of hydrocarbons in the Pegasus Basin.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Geology. $3 670379
650 4 $a Petroleum geology. $3 1185942
650 4 $a Marine geology. $3 1178828
655 7 $a Electronic books. $2 local $3 554714
690 $a 0372
690 $a 0583
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710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Colorado School of Mines. $b Geology and Geological Engineering. $3 1183329
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10267226 $z click for full text (PQDT)