title: The lithospheric geodynamics of plate boundary transpression in New Zealand: Initiating and emplacing subduction along the Hikurangi margin, and the tectonic evolution of the Alpine Fault system

authors: Furlong, Kevin P.

subjects: plate tectonics of New Zealand

abstract: In contrast to the normal ‘Wilson cycle’ sequence of subduction leading to continental collision and associated mountain building, the evolution of the New Zealand plate boundary in the Neogene reflects the converse—initially a period of continental convergence that is followed by the emplacement of subduction. Plate reconstructions allow us to place limits on the location and timing of the continental convergence and subduction zones and the migration of the transition between the two plate boundary regimes. Relative plate motions and reconstructions since the Early to Mid-Miocene require significant continental convergence in advance of the emplacement of the southward migrating Hikurangi subduction—a sequence of tectonism seen in the present plate boundary geography of Hikurangi subduction beneath North Island and convergence in the Southern Alps along the Alpine Fault. In contrast to a transition from subduction to continental convergence where the leading edge of the upper plate is relatively thin and deformable, the transition from a continental convergent regime, with its associated crustal and lithospheric thickening, to subduction of oceanic lithosphere requires substantial thinning (removal) of upper plate continental lithosphere to make room for the slab. The simple structure of the Wadati–Benioff zone seen in the present-day geometry of the subducting Pacific plate beneath North Island indicates that this lithospheric adjustment occurs quickly. Associated with this rapid lithospheric thinning is the development of a series of ephemeral basins, younging to the south, that straddle the migrating slab edge. Based on this association between localized vertical tectonics and slab emplacement, the tectonic history of these basins records the effects of lithospheric delamination driven by the southward migrating leading edge of the subducting Pacific slab. Although the New Zealand plate boundary is often described as simply two subduction zones linked by the transpressive Alpine Fault, in actuality the present is merely a snapshot view of an ongoing and complex evolution from convergence to subduction.

text: The lithospheric geodynamics of plate boundary transpression in New Zealand: Initiating and emplacing subduction along the Hikurangi margin, and the tectonic evolution of the Alpine Fault system In contrast to the normal ‘Wilson cycle’ sequence of subduction leading to continental collision and associated mountain building, the evolution of the New Zealand plate boundary in the Neogene reflects the converse—initially a period of continental convergence that is followed by the emplacement of subduction. Plate reconstructions allow us to place limits on the location and timing of the continental convergence and subduction zones and the migration of the transition between the two plate boundary regimes. Relative plate motions and reconstructions since the Early to Mid-Miocene require significant continental convergence in advance of the emplacement of the southward migrating Hikurangi subduction—a sequence of tectonism seen in the present plate boundary geography of Hikurangi subduction beneath North Island and convergence in the Southern Alps along the Alpine Fault. In contrast to a transition from subduction to continental convergence where the leading edge of the upper plate is relatively thin and deformable, the transition from a continental convergent regime, with its associated crustal and lithospheric thickening, to subduction of oceanic lithosphere requires substantial thinning (removal) of upper plate continental lithosphere to make room for the slab. The simple structure of the Wadati–Benioff zone seen in the present-day geometry of the subducting Pacific plate beneath North Island indicates that this lithospheric adjustment occurs quickly. Associated with this rapid lithospheric thinning is the development of a series of ephemeral basins, younging to the south, that straddle the migrating slab edge. Based on this association between localized vertical tectonics and slab emplacement, the tectonic history of these basins records the effects of lithospheric delamination driven by the southward migrating leading edge of the subducting Pacific slab. Although the New Zealand plate boundary is often described as simply two subduction zones linked by the transpressive Alpine Fault, in actuality the present is merely a snapshot view of an ongoing and complex evolution from convergence to subduction.

year: 2009

title: The role of a weed management Agency – a smart approach to delivering innovative biosecurity services

authors: Mole, David

abstract: Over the past year, Land Information New Zealand (LINZ) has taken a new approach to biosecurity as a result of significant external factors and a new, organisation-wide 10 year vision. We have reviewed our biosecurity aims and goals, and re-examined the tools and processes that determine our ability to fulfil these overarching outcomes and objectives.
Our new thinking about biosecurity has been informed by what we call SMART procurement, and this approach has encouraged innovation, ensured a better focus on outcomes, and laid the foundations for a truly strategic partnership with our suppliers. This
presentation will outline our SMART philosophy, and offer some thoughts on its benefits over traditional models of biosecurity management, focusing in particular on our aquatic weed control work.

text: The role of a weed management Agency – a smart approach to delivering innovative biosecurity services Over the past year, Land Information New Zealand (LINZ) has taken a new approach to biosecurity as a result of significant external factors and a new, organisation-wide 10 year vision. We have reviewed our biosecurity aims and goals, and re-examined the tools and processes that determine our ability to fulfil these overarching outcomes and objectives.
Our new thinking about biosecurity has been informed by what we call SMART procurement, and this approach has encouraged innovation, ensured a better focus on outcomes, and laid the foundations for a truly strategic partnership with our suppliers. This
presentation will outline our SMART philosophy, and offer some thoughts on its benefits over traditional models of biosecurity management, focusing in particular on our aquatic weed control work.

year: 2015

title: The Pirates of Parihaka: Parody as a Response to Violence

authors: Moffat, Kirstine

abstract: This paper originates from my archival exploration of Gilbert and Sullivan, specifically Frank Rolleston's adaptation of Pirates of Penzance, a discovery pivotal for my chapter on Gilbert and Sullivan in colonial New Zealand. This led to a broader investigation into literary and musical responses to Parihaka, contemplating the appropriateness of capturing its essence. In 2019, reflecting on our national journey, I align with Ihimaera's perspective, acknowledging the justified anger at injustice but also embracing the optimism and hope—a new dawn after the dark night, symbolizing death, resurrection, and new life. The Maori proverb "Ko te poo e teiwi te kai hari te raa" encapsulates this sentiment, emphasizing that the night brings the day, and "Ko te mate te kai hari i te orange e au" asserts that death brings life.

text: The Pirates of Parihaka: Parody as a Response to Violence This paper originates from my archival exploration of Gilbert and Sullivan, specifically Frank Rolleston's adaptation of Pirates of Penzance, a discovery pivotal for my chapter on Gilbert and Sullivan in colonial New Zealand. This led to a broader investigation into literary and musical responses to Parihaka, contemplating the appropriateness of capturing its essence. In 2019, reflecting on our national journey, I align with Ihimaera's perspective, acknowledging the justified anger at injustice but also embracing the optimism and hope—a new dawn after the dark night, symbolizing death, resurrection, and new life. The Maori proverb "Ko te poo e teiwi te kai hari te raa" encapsulates this sentiment, emphasizing that the night brings the day, and "Ko te mate te kai hari i te orange e au" asserts that death brings life.

year: 2019-11-26