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A new ‘Southern Giant Crab’ from a miocene continental slope palaeoenvironment at Taranaki, North Island, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-02-27 Barry W. M. van Bakel, Àlex Ossó
Large-sized extinct crab specimens recovered from Waitoetoe beach, North Island, New Zealand form the basis for a new species of ‘Southern Giant Crab’, Pseudocarcinus karlraubenheimeri n. sp. The s...
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Contrasting evolution of beach gold on two sides of an active orogen, Southern Alps, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-02-12 Marshall Palmer, Tom Ritchie, Dave Craw
Placer gold on beaches on either side of a major active mountain belt has strongly contrasting compositions and morphologies. Pleistocene-Holocene beach gold placers have formed along the West Coas...
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New Zealand’s offshore sedimentary basins N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-01-31 Kyle J. Bland, Dominic P. Strogen, Malcolm J. Arnot, G. Paul D. Viskovic, Tusar R. Sahoo, Hannu Seebeck, Richard Kellett, Suzanne Bull, Glenn P. Thrasher, Karsten F. Kroeger, Mark J. F. Lawrence, Angela G. Griffin
We present new interpretations and mapping that define the distribution, extent, and sediment thickness of 25 primarily offshore sedimentary basins within New Zealand’s Exclusive Economic Zone (EEZ...
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Geoecological evolution of New Zealand’s only inland salt lake N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-01-28 Dave Craw, Cathy Rufaut, Marshall Palmer
The Sutton Salt Lake is a rare occurrence of an inland evaporative saline lake on a small landmass with a temperate maritime climate. The lake lies on a bed of impermeable loess silt in a 2 ha depr...
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The Te Puninga Fault, Hauraki Plains: a new seismic source in the low seismicity northern region of New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-01-31 Pilar Villamor, Kate Clark, Genevieve Coffey, Joshua Hughes, David J. Lowe, Alan Hogg, Vicki Moon, Jose Moratalla, Kiran Thingbaijam
In this study, we provide the first field-based assessment of the seismic potential of the Te Puninga Fault, Hauraki Plains, Waikato region. Initially considered to be part of the nearby Kerepehi F...
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Late Quaternary activity of the NW Cardrona Fault, Otago, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-01-28 Ella J. van den Berg, Jack N. Williams, Mark W. Stirling, David J. A. Barrell, Jonathan D. Griffin, Nicola J. Litchfield, Ningsheng Wang
We use new paleoseismic data and lidar to reassess late Quaternary activity of the NW (northwest) Cardrona Fault, a ∼60 km long range-bounding fault in Otago. Paleoseismic investigations of the NW ...
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Strategic changes to the New Zealand Journal of Geology and Geophysics (NZJGG) N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2024-01-28 James M. Scott
Published in New Zealand Journal of Geology and Geophysics (Vol. 67, No. 1, 2024)
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Performance analysis of P-wave detection algorithms for a community-engaged earthquake early warning system – a case study of the 2022 M5.8 Cook Strait earthquake N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-11-20 Chanthujan Chandrakumar, Marion Lara Tan, Caroline Holden, Max T. Stephens, Raj Prasanna
Can a P-wave detection algorithm enhance the performance of an Earthquake Early Warning System (EEWS), particularly in community-engaged networks of low-cost ground motion sensors susceptible to no...
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Geochemical and isotopic characterisation of trench sediment at the Hikurangi Margin from IODP sites U1518 and U1520 N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-11-20 Carlos R. Corella Santa Cruz, Susanne M. Straub, Georg F. Zellmer, Claudine H. Stirling, Malcolm R. Reid, David Barr, Candace E. Martin, Marco Brenna, Karoly Nemeth
The composition of trench sediment at convergent margins exhibits strong compositional links to the corresponding arc magmas. To test for the existence of such links at the Hikurangi margin, we pro...
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Correction N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-11-22
Published in New Zealand Journal of Geology and Geophysics (Vol. 67, No. 1, 2024)
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Detrital gold morphology and recycling around the early Miocene St Bathans paleovalley, Central Otago, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-11-20 Marshall Palmer, Dave Craw
The St Bathans paleovalley developed as a major southwest-draining fluvial system during early Miocene rejuvenation of the Central Otago landscape. Rounded quartz pebbles and detrital gold were rec...
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Contemporaneous alkaline and subalkaline intraplate magmatism in the Dunedin Volcanic Group, NZ, caused by mantle heterogeneity N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-11-16 Laura J. E. Wilson, E. Giacalone, James M. Scott, Marco Brenna, James D. L. White, Petrus J. le Roux, Sidney R. Hemming, Marshall C. Palmer, Stephen E. Read, Malcolm R. Reid, Claudine H. Stirling
Monogenetic volcanism in the Maniototo Basin in the Dunedin Volcanic Group was unusual because the eroded lavas, plugs and dikes comprise spatially and temporally restricted silica-saturated and si...
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Towards a tectonic framework for normal faults in Waitematā Group rocks, North Island, Aotearoa-New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-10-18 Kerensa J. Jennings, James D. Muirhead, K. Bernhard Spörli, Lorna J. Strachan
Analyses of active and past normal fault behaviour in extensional settings provide key insights into regional-scale tectonic processes driven by plate boundary forces. To better understand past tec...
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Paleoearthquakes at the junction of the Tokomaru and Northern Ōhāriu faults, implications for fault interactions in the southern North Island, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-10-09 Genevieve L. Coffey, Robert M. Langridge, Nicola J. Litchfield, Russ J. Van Dissen, Kate J. Clark
The Tokomaru Fault extends along the west side of the southern North Island of New Zealand. Given the fault’s proximity to major and expanding population centres, new work was undertaken to underst...
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Structural evolution, segmentation and activity of the onshore-offshore Waimea-Flaxmore Fault System in south-eastern Tasman Bay, South Island, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-10-04 Francesca C. Ghisetti, Mike R. Johnston, Paul Wopereis, Richard H. Sibson
The Waimea-Flaxmore Fault System (W-FFS) from the Nelson-Richmond urban area to D’Urville Island is analysed through six regional transects that join depth-converted seismic lines in Tasman Bay to ...
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Geometry and deformation of the sole of a large obducted ophiolitic unit: insights from surface geology and airborne electromagnetics – Peridotite Nappe, New Caledonia N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-09-11 Benjamin Le Bayon, Pierre Maurizot, Pierre-Alexandre Reninger, Stéphane Lesimple, Marion Iseppi, Lilian Alizert, José Perrin, Renjie Zhou
ABSTRACT To clarify the serpentinite correlation and kinematics in New Caledonia, we focus on the northwestern boundary of the Massif du Sud and the Mont Do Massif, in the Boulouparis area. On the basis of airborne electromagnetics data, structural analysis, and field data, we propose a significantly different model to the one commonly proposed for Peridotite Nappe emplacement. The interpretation is
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A diverse Late Pliocene fossil fauna and its paleoenvironment at Māngere, Auckland, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-08-27 Bruce W. Hayward, Thomas F. Stolberger, Nathan Collins, Alan G. Beu, Wilma Blom
ABSTRACT Excavations at Māngere Wastewater Treatment Plant, Auckland, in 2020 provided New Zealand’s richest and most diverse fossil faunas of mid-Pliocene age (Waipipian Stage, 3.7–3.0 million years old). The vast excavated heap of sandy shell was extensively searched and sieved resulting in the recovery of 266 fossil taxa, (particularly rich in Mollusca including 77 Bivalvia, 105 Gastropoda, 32 Foraminifera
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Hydrogeological controls on formation of Patearoa saline site in Central Otago, New Zealand and definition of geoecological salt lines N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-08-21 Dave Craw, Cathy Rufaut, Stephen Read, Dhana Pillai
ABSTRACT The Patearoa saline site in Maniototo basin has developed on variably clay-altered Otago Schist. Decomposition and sedimentary redistribution of schist outcrop components has led to formation of bare soil-free substrates (upper metre scale) with contrasting permeability to rain and shallow groundwater percolation. Relatively impermeable clay-rich substrates, with a surface crust (cm scale)
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Roger Cooper: paleobiologist and geologist N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-08-13 James S. Crampton, Richard Jongens, Alan Cooper
Published in New Zealand Journal of Geology and Geophysics (Vol. 66, No. 3, 2023)
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The Ross–Delamerian Orogen in the southwest Pacific and Antarctica: an active plate boundary for Gondwana in the late Neoproterozoic and Cambrian N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-08-13 John D. Bradshaw
ABSTRACT Neoproterozoic and Cambrian tectonic and magmatic events in southeast Australia, Tasmania, New Zealand and the Transantarctic Mountains have been described as aspects of the Ross–Delamerian Orogeny. Summaries of the salient points suggest they are parts of the same active margin that developed along a paleo-Pacific rifted edge of the fragmented Rodinia supercontinent. Late Neoproterozoic to
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Anatomy of an obducted ultramafic unit (Tiébaghi Massif – Peridotite Nappe – New Caledonia): Polyphase brittle tectonics constrained by fault-slip data and crack seal mineralogy N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-08-14 Pierre Maurizot, Bernard Robineau, Julie Jeanpert, Marion Iseppi, Stéphane Lesimple, Farid Juillot, Michael Meyer, Patrick Fullenwarth, Vincent Mardhel
ABSTRACT New data collected in the mining areas of the Tiébaghi Massif, a klippe of the Peridotite Nappe located in the north of New Caledonia, are presented. Data were collected in open cast nickel mine pits and chromite underground works, notably along a 1.2-km long tunnel which penetrates the deep geological structure of the massif. Surface and sub-surface geology, microtectonic observations and
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A tectonic reconstruction model for Aotearoa-New Zealand from the mid-Late Cretaceous to the present day N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-08-02 Hannu Seebeck, Dominic P. Strogen, Andrew Nicol, Benjamin R. Hines, Kyle J. Bland
ABSTRACT We present a mid-Late Cretaceous to present day tectonic reconstruction model for Aotearoa-New Zealand. Our GPlates model comprises 50 rigid crustal blocks grouped into regions with common deformation histories set within a well-defined Australia-Pacific-Antarctica plate circuit tied to a published global paleomagnetic absolute reference frame. Within the model, four distinct periods of deformation
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A possible Jurassic age for the New Caledonia Trough and implications for Zealandia’s history N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-07-19 Christopher Ian Uruski
ABSTRACT The New Caledonia Trough is a bathymetric depression extending 2,500 km from New Zealand to the Coral Sea. Sedimentary successions up to 10 km thick are contained in three main sedimentary basins, the New Caledonia, Fairway and Deepwater Taranaki basins. Deepwater Taranaki Basin occupies the head of the New Caledonia Trough adjacent to the well-known Taranaki Basin lying almost entirely within
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Sedimentation since 140 ka in Te Tai-o-Aorere Tasman Bay, Aotearoa New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-07-12 Katherine L. Maier, Susi Woelz, Philip M. Barnes, Scott D. Nodder, Alan Orpin, Joshu J. Mountjoy
ABSTRACT Late Pleistocene and Holocene sedimentation records changes in glacio-eustatic cycles, oceanography, active tectonics, and sediment supply. Here, we use high-resolution seismic-reflection profiles in Te Tai-o-Aorere Tasman Bay to investigate sedimentary deposit distributions associated with sea-level cyclicity over ∼140 ka. We identify nine seismic stratigraphic units below the inner continental
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Records of the 5 March 2021 Raoul Island transoceanic tsunami around the Pacific Ocean N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-07-04 Jean Roger
ABSTRACT At 19:28 AM on 4 March 2021 (UTC), a Mw 8.1 megathrust earthquake occurred close to Raoul Island, New Zealand, on the Kermadec Subduction Zone. Closely following two other tsunamigenic ruptures, it triggered a tsunami that was quickly recorded by oceanic and coastal gauges. Analysis of 158 filtered sea-level records revealed that the tsunami had not only a regional impact but was recorded
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Basanite cobbles in Pleistocene sediments in Central Otago and their implications for intraplate volcanism and Clutha River paleo-drainage N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-06-15 James M. Scott, Alan F. Cooper, Dave Craw, Petrus J. le Roux, Hayden B. Dalton, Marshall C. Palmer
ABSTRACT The occurrence of volcanic basanite cobbles in Pleistocene terraces at Galloway and in the upper Clutha valley in Central Otago, in an area devoid of known volcanic edifices, has implications for Cenozoic intraplate volcanism and Pleistocene drainage in the region. We present petrographic, mineralogical, whole rock geochemical and Sr-Nd-Pb isotopic data, as well as an 39Ar-40Ar date of 24
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Tectonic subsidence and uplift within Canterbury Basin, South Island, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-06-07 Katherine Dvorak, Michelle Kominz, Martin Crundwell
ABSTRACT The Canterbury Basin is a portion of the mostly submerged continent of Zealandia that formed along the eastern portion of the Gondwanan front. Based on tectonic subsidence analyses of IODP Expedition 317 boreholes and Clipper-1 well data, we argue for a rapid subsidence event (∼84 Ma to ∼76 Ma) which we interpret as transit away from a region of mantle upwelling. Breakup was followed by thermal
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Composition and Miocene deformation of the lithospheric mantle adjacent to the Marlborough Fault System in North Canterbury N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-06-04 Sophie J. Bonnington, James M. Scott, Marshall C. Palmer, Nadine P. Cooper, Malcolm R. Reid, Claudine H. Stirling
ABSTRACT Mantle xenoliths in a nephelinite in the Little Lottery River provide insight into the Miocene mantle adjacent to the Australia-Pacific plate boundary in N Canterbury. The xenoliths comprise peridotite and pyroxenite extracted from depths of ∼ 40 to 60 km. The olivine Mg# < 89, a lack of spinel and occurrence of ilmenite, elevated bulk Cr and Al, light rare Earth element (REE)-enriched clinopyroxene
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The first Triassic elasmobranch teeth from the Southern Hemisphere (Canterbury, New Zealand) N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-05-21 Jan Rees, Hamish J. Campbell, John E. Simes
ABSTRACT The Triassic record of modern sharks, rays, and skates (Elasmobranchii) is scattered and geographically biased towards the Northern Hemisphere and Europe in particular. Here, we report the first Triassic elasmobranch teeth from the Southern Hemisphere, originating from Norian strata of New Zealand. The teeth are few in numbers but relatively well preserved and indicate the presence of three
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Cambrian ocean floor crust preserved in the Takaka Terrane, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-05-15 Carsten Münker, Frank Wombacher, Christopher Siebert
ABSTRACT Cambrian igneous rocks in the Takaka Terrane of New Zealand provide important constraints for geodynamic reconstructions of the Cambrian SE Gondwana margin. We provide field data and a comprehensive trace element and isotope dataset for such rocks from the upper Baton River area in northwest Nelson, New Zealand, including the first combined Hf-Nd isotope data for Takaka Terrane rocks. These
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The potential for palaeoseismic and palaeoclimatic reconstructions from Lake Tennyson, North Canterbury, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-05-15 John-Mark Woolley, Andrew Lorrey, Paul Augustinus, Patricia S. Gadd
ABSTRACT Lake Tennyson’s basin and sedimentary record were assessed for multiple branches of paleoenvironmental research. A geophysical investigation of the lake depositional setting was supported by physical and chemical analysis of multiple sediment cores. The basin reaches 60 m depth and several subaerial landforms identified were likely deposited from seismic activity. Deformed sediments and turbidites
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Introduction to the Kaikōura earthquake special issue N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-05-07 Andrew Nicol, Andy Howell, Nicola Litchfield, Thomas Wilson, Stephen Bannister, Chris Massey
ABSTRACT The Kaikōura Earthquake ruptured a complex network of at least 20 faults in the northeastern South Island, with variable geometries, slip and slip rates. Ground shaking and surface fault rupture generated a tsunami, thousands of landslides, and many dammed rivers. The earthquake damaged farmland, buildings and infrastructure in the northeastern South Island and Wellington regions, closing
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Structure and topology of a brittle-ductile fault swarm at Crawford Knob, Franz Josef, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-05-07 Susan Ellis, Matthew Hill, Timothy A. Little
ABSTRACT We present surface and structural models of a swarm of dm-scale subparallel faults exposed in a ∼2000 m2 glaciated outcrop near Franz Josef Glacier, in the Southern Alps of New Zealand. These structures are inferred to have slipped at ∼20 km depth in the hanging-wall Alpine Schist of the Alpine Fault under conditions that were variably brittle to ductile as the Pacific Plate was tilted and
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Zealandia and Australia at Ordovician continental margins: reconciling their similar and differing detrital zircon provenances within Rodinia N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-04-17 Chris J. Adams, Hamish J. Campbell
ABSTRACT New detrital zircon ages from biostratigraphically well-controlled Ordovician sandstones in southeast Australia are compared with published counterparts in southern Zealandia. During Rodinia supercontinent assembly (RA), Australia and Zealandia age patterns are similar, everywhere with ubiquitous late Mesoproterozoic magmatic zircon sources. However, during earliest Gondwana supercontinent
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Cretaceous tectonostratigraphy of ‘the Great Coverham section’ and adjacent areas, northeastern Waiau Toa/Clarence valley, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-04-03 James S. Crampton
ABSTRACT Late Early–Late Cretaceous strata preserved at the northeastern end of the Waiau Toa/Clarence valley, northeastern South Island, New Zealand, have been central to ongoing debates concerning the end of Mesozoic subduction on the Zealandian margin of Gondwana and the initiation of extension. New geological mapping within this area at Coverham, Kekerengu and Wharekiri, has resolved complex relationships
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The New Zealand Community Fault Model – version 1.0: an improved geological foundation for seismic hazard modelling N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-03-19 Hannu Seebeck, Russ Van Dissen, Nicola Litchfield, Philip M. Barnes, Andrew Nicol, Robert Langridge, David J. A. Barrell, Pilar Villamor, Susan Ellis, Mark Rattenbury, Stephen Bannister, Matthew Gerstenberger, Francesca Ghisetti, Rupert Sutherland, Hamish Hirschberg, Jeff Fraser, Scott D. Nodder, Mark Stirling, Jade Humphrey, Kyle J. Bland, Andrew Howell, Joshu Mountjoy, Vicki Moon, Timothy Stahl,
ABSTRACT The New Zealand Community Fault Model (NZ CFM) is a publicly available representation of New Zealand fault zones that have the potential to produce damaging earthquakes. Compiled through collaborative engagement between New Zealand earthquake-science experts, this first edition (version 1.0) of the NZ CFM builds upon previous compilations of earthquake-source active fault models with the addition
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Terrane and core complex architecture of the Otago Schist in the Dunstan and Cairnmuir Mountains, New Zealand, from U-Pb and (U-Th)/He zircon dating N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-02-23 Nick Mortimer, Jeffrey Lee, Daniel F. Stockli
ABSTRACT We report ten new zircon (U-Th)/He ages from psammitic greyschists collected in a southwest-northeast profile in the Otago Schist across the Dunstan and Cairnmuir Mountains, New Zealand. Six of the samples have accompanying new detrital zircon U-Pb ages. In this part of the Otago Schist, a broad antiformal core of garnet-biotite-albite zone schist defines a range-scale footwall block to the
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A time-dependent seismic hazard model following the Kaikōura M7.8 earthquake N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-02-15 Matthew C. Gerstenberger, David A. Rhoades, Nicola Litchfield, Elizabeth Abbott, Tatiana Goded, Annemarie Christophersen, Russell J. Van Dissen, Stephen Bannister, David Barrell, Zane Bruce, Bill Fry, Ian Hamling, Caroline Holden, Nick Horspool, Anna E. Kaiser, Yoshi Kaneko, Robert M. Langridge, Timothy A. Little, Biljana Lukovic, Sara K. McBride, Graeme H. McVerry, Andy Nicol, Nick Perrin, Jarg Pettinga
ABSTRACT Following the 2016 M7.8 Kaikōura earthquake, a time-varying seismic hazard model (KSHM) was developed to inform decision-making for the reinstatement of road and rail networks in the northern South Island. The source model is the sum of a gridded 100-year earthquake clustering model and an updated fault source model. The gridded model comprises long-term, medium-term and short-term components
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A large enigmatic fossil from the early Cambrian (Series 2, Stage 3) Heatherdale Shale of South Australia N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-02-09 James B. Jago, James G. Gehling, Nicholas M. Lemon, Richard J. F. Jenkins, Diego C. García-Bellido
ABSTRACT A large enigmatic fossil is described from the early Cambrian (Series 2, Stage 3) Heatherdale Shale in the Fleurieu Peninsula, South Australia. It has an almost circular outline about 150 mm across, with an outer rim and 27–30 evenly-spaced rays that extend about two-thirds of the distance to the centre of the structure; it shows radial symmetry. There is a featureless central area with a
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Geological controls on locally elevated arsenic in the Glenorchy area, Otago, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-02-06 Dave Craw, Joanna Druzbicka
ABSTRACT The Glenorchy area of northwest Otago consists of a low-relief Holocene fluvial delta complex below glaciated mountains of Otago Schist basement, and has locally elevated arsenic (As) from two geogenic pathways: Mesozoic hydrothermal processes and Holocene shallow groundwater transport. Soils on the delta complex are primitive and contain abundant sand and silt derived from unoxidised schist
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Lithostratigraphy of Paleozoic metasediments in southern Fiordland, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-01-18 Richard Jongens, Ian M. Turnbull, Andrew H. Allibone
ABSTRACT The lithostratigraphy of Early Paleozoic metasediments from southern Fiordland is described, with three groups and 14 formations formally defined. In southwest Fiordland, the Fanny Bay Group is a quartz-rich succession of metamorphosed sandstone, mudstone, and quartzite; the Cameron Group is a lithologically variable succession of metavolcanic, psammitic, pelitic and calc-silicate rocks; the
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We’re all in this together? Community resilience and recovery in Kaikōura following the 2016 Kaikōura-Hurunui earthquake N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-01-15 Joanna Fountain, Nicholas A. Cradock-Henry
ABSTRACT The magnitude 7.8 earthquake that struck North Canterbury, on the east coast of New Zealand’s South Island on 14 November 2016 had significant impacts and implications for the community of Kaikōura and surrounding settlements. The magnitude and scope of this event has resulted in extensive and ongoing geological and geophysical research into the event. The current paper complements this research
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The ‘Gulliver’ fish fauna of an early Miocene freshwater system of New Zealand; new insights from otoliths from the Bannockburn Formation N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2023-01-15 Werner Schwarzhans, R. Paul Scofield, Alan J. D. Tennyson, Jennifer P. Worthy, Trevor H. Worthy
ABSTRACT The early Miocene palaeolake Manuherikia in Central Otago, South Island, New Zealand is a prime source for reconstructing the terrestrial and freshwater biota of past Zealandia. Otoliths of fishes that once lived in this lake system were first described in 2012. Here we report the results of extensive additional sampling resulting in a total of 16,500 fish otoliths from a wide set of stratigraphic
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Hundalee Fault, North Canterbury, New Zealand: late Quaternary activity and regional tectonics N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-12-15 David J. A. Barrell, Mark W. Stirling, Jack N. Williams, Katrina M. Sauer, Ella J. van den Berg
ABSTRACT The Hundalee Fault forms part of the southeastern margin of the 2016 Kaikōura Earthquake rupture zone. Its late Quaternary activity and structural character may offer insights to fault interrelationships associated with the 2016 rupture. Mapping of the Hundalee Fault revealed several pre-existing fault scarps. Trenching of a scarp across a fluvial terrace together with radiocarbon dating shows
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New records of hexanchiform sharks (Elasmobranchii: Neoselachii) from the Late Cretaceous of Antarctica with comments on previous reports and described taxa N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-11-14 Rodolfo Otávio dos Santos, Douglas Riff, Cecilia R. Amenábar, Renato Rodriguez Cabral Ramos, Igor Fernandes Rodrigues, Sandro Marcelo Scheffler, Marcelo de Araújo Carvalho
ABSTRACT Sharks are virtually absent from coastal Antarctica since the Late Eocene glaciations, but this group exhibited a notable austral diversity during the Cretaceous and Paleogene. Several species have already been described from the Aptian-Eocene successions of the Larsen Basin exposed in the James Ross Island area (northern Antarctic Peninsula) and the predominantly deep-water Hexanchiformes
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Communicating evacuation information to multi-storey apartment dwellers: a case study of the 2016 Kaikōura earthquake in Te Whanganui-a-Tara (Wellington), Aotearoa New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-10-26 Julia S. Becker, Denise Blake, Jessica Thompson, Lauren J. Vinnell, Emma E. H. Doyle
ABSTRACT On 14 November 2016, the Mw 7.8 Kaikōura earthquake and tsunami occurred in Aotearoa New Zealand, impacting the city of Te Whanganui-a-Tara (Wellington). As many people reside in apartments in Wellington, we undertook a survey followed by interviews to understand evacuation information communicated to apartment dwellers, and how residents used that information for decision-making. Immediately
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There is no geophysical evidence for the Mahuika Crater on the continental shelf southwest of New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-09-15 Kevin A. Mackay
This study examines new bathymetric and geophysical evidence that questions the existence of the Mahuika Crater: a proposed impact depression 20.2 km wide lying on the continental shelf ∼250 km SW ...
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Late Holocene earthquakes on the Papatea Fault and its role in past earthquake cycles, Marlborough, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-09-15 Robert M. Langridge, Kate J. Clark, Peter Almond, Stéphane Baize, Andrew Howell, Jesse Kearse, Regine Morgenstern, Kirstin Deuss, Edwin Nissen, Julián García-Mayordomo, Colin Amos
ABSTRACT The north-striking sinistral reverse Papatea Fault ruptured with a very large (up to 12 m) oblique slip as part of the 2016 MW 7.8 Kaikōura earthquake in the northeastern South Island. Paleoseismic studies were undertaken at three sites along the Papatea Fault, named Murray’s roadcut, Jacqui’s Gully (both on the main strand), and Wharekiri trench (western strand). These sites provide evidence
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Palaeogeographic evolution of Zealandia: mid-Cretaceous to present N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-09-12 Dominic P. Strogen, Hannu Seebeck, Benjamin R. Hines, Kyle J. Bland, James S. Crampton
ABSTRACT We present a suite of 15 palaeogeographic maps illustrating the geological evolution of the entirety of Zealandia, from mid-Cretaceous to present, highlighting major tectonic phases, from initial Gondwana rifting through to development of the Neogene plate boundary. They illustrate palaeobathymetric and palaeofacies interpretations along with supporting geological datasets and a synthesis
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Microfossil evidence for a possible maar crater and tuff ring beneath Rangitoto Volcano, Auckland, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-09-12 Bruce W. Hayward, Jenni L. Hopkins, Margaret Morley, Jill A. Kenny
Distinctive low diversity foraminiferal and ostracod faunas in Holocene mud from a stratigraphic drillhole through Rangitoto Volcano (∼600 years old) indicate a highly sheltered, shallow-marine env...
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Miocene-Holocene river drainage evolution in Southland, New Zealand, deduced from fish genetics, detrital gold and geology N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-09-08 Dave Craw, Ciaran Campbell, Jonathan M. Waters
We integrate multidisciplinary observations to provide a regional-scale synthesis of river drainage reconfiguration in Southland (New Zealand) between the Miocene and the Holocene. Distributions of...
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Re-visiting the structural and glacial history of the Shackleton Glacier region of the Transantarctic Mountains, Antarctica N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-08-24 David H. Elliot
Only at Cape Surprise, central Transantarctic Mountains, is there exposed stratigraphic evidence for major offset along the range front, which marks a major boundary in Antarctica. Several faults p...
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The Lord Howe Volcanic Complex, Australia: its geochemistry and origins N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-08-24 Megan L. Williams, Brian G. Jones
The Lord Howe Volcanic Complex (LHVC) is part of a seamount chain associated with the detached continental crust of Zealandia. We present petrographic and geochemical data for the LHVC, including t...
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Sediment provenance in the Murchison and Maruia basins, Aotearoa/New Zealand: a record of Neogene strike-slip displacement, convergence, and basement exhumation along the Australian–Pacific plate boundary N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-08-18 Matthew W. Sagar, Karen E. Higgs, Dominic P. Strogen, Kyle J. Bland, Greg H. Browne
The Murchison and Maruia basins are situated on the Australian Plate adjacent the Alpine Fault, an ideal place to study Cenozoic Australian–Pacific plate boundary evolution. Sandstone provenance wa...
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Litho- and biostratigraphy of a late Oligocene–Early Miocene succession in the Weber area, southern Hawke’s Bay, and implications for early Hikurangi subduction-margin evolution N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-08-10 Kyle J. Bland, Hugh E. G. Morgans, Dominic P. Strogen, Hannah Harvey
ABSTRACT A deep-marine sedimentary succession of Whaingaroan to Altonian age (Early Oligocene–Early Miocene), cropping out near Weber, southern Hawke’s Bay, records abrupt changes in depositional paleoenvironments and sedimentary lithofacies. Highly calcareous early Waitakian (latest Oligocene) Weber Formation (Mangatu Group/Waka Supergroup) is unconformably overlain by terrigenous-dominated late Waitakian–Otaian
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Age and structure of the Permian Brook Street Terrane, Takitimu Mountains, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-07-31 Matthew J. Campbell, Nick Mortimer, Gideon Rosenbaum, Charlotte M. Allen, Paulo M. Vasconcelos, Hamish J. Campbell
ABSTRACT We use a recently completed airborne magnetic and gamma-ray spectrometric survey, and new U/Pb and 40Ar/39Ar age determinations, to revise and clarify several aspects of Brook Street Terrane geology in the Takitimu Mountains. Steeply dipping and homoclinal Permian Takitimu Subgroup formations defined in the central part of the range can, with moderate confidence, be traced along strike to
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Foraminiferal evidence for the provenance and flow history of turbidity currents triggered by the 2016 Kaikōura Earthquake, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-07-27 Bruce W. Hayward, Ashwaq T. Sabaa, Jamie D. Howarth, Alan R. Orpin, Lorna J. Strachan
ABSTRACT The 2016 Mw 7.8 Kaikōura Earthquake triggered simultaneous turbidity currents down ten submarine canyons along a 200 km stretch of the continental slope, east of New Zealand. Some discharged into the Hikurangi Channel which flows >1500 km northwards along the abyssal trench floor. To better understand provenance continuity in deep-sea sedimentary records, foraminiferal samples from the 2016
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Depositional rate, grain size and magnetic mineral sulfidization in turbidite sequences, Hikurangi Margin, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-07-21 Atsushi Noda, Annika Greve, Adam Woodhouse, Martin Crundwell
ABSTRACT Sedimentological and rock magnetic analysis was performed on 67 turbidite samples recovered from Lithostratigraphic units I–III at IODP Site U1520 with the aim to characterise the sedimentary processes and post-depositional diagenesis within a Quaternary sequence in the Hikurangi Trough, New Zealand. Lithostratigraphic Unit I was rapidly emplaced with frequent turbidite deposition with high
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Biostratigraphically constrained chronologies for Quaternary sequences from the Hikurangi margin of north-eastern Zealandia N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-07-20 Martin P. Crundwell, Adam Woodhouse
ABSTRACT New biostratigraphically constrained chronologies have been developed to help elucidate the sedimentary and tectonic history of Quaternary sequences on the Hikurangi margin of north-eastern Zealandia. Three sites on the mid to lower slope of the accretionary prism (IODP Site 372-U1517, 375-U1519, 375-U1518) and two sites east of the deformation front (Hikurangi Trough Site 375-U1520 and Tūranganui
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Trench floor depositional response to glacio-eustatic changes over the last 45 ka, northern Hikurangi subduction margin, New Zealand N. Z. J. Geol. Geophys. (IF 2.2) Pub Date : 2022-07-20 Adam Woodhouse, Philip M. Barnes, Anthony Shorrock, Lorna J. Strachan, Martin Crundwell, Helen C. Bostock, Jenni Hopkins, Steffen Kutterolf, Katharina Pank, Erik Behrens, Annika Greve, Rebecca Bell, Ann Cook, Katerina Petronotis, Leah LeVay, Robert A. Jamieson, Tracy Aze, Laura Wallace, Demian Saffer, Ingo Pecher
ABSTRACT Glacio-eustatic cycles lead to changes in sedimentation on all types of continental margins. There is, however, a paucity of sedimentation rate data over eustatic sea-level cycles in active subduction zones. During International Ocean Discovery Program Expedition 375, coring of the upper ∼110 m of the northern Hikurangi Trough Site U1520 recovered a turbidite-dominated succession deposited