A5022606918- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Isotope Analysis in Ecology
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Pacific and Southeast Asian Studies
- Geological Studies and Exploration
- High-pressure geophysics and materials
- Marine Biology and Ecology Research
- Pleistocene-Era Hominins and Archaeology
- Polar Research and Ecology
- Clay minerals and soil interactions
- Marine and coastal plant biology
- Evolution and Paleontology Studies
- Climate variability and models
- Geochemistry and Elemental Analysis
Victoria University of Wellington
2013-2023
University of Dundee
2018
Institute of Arctic and Alpine Research
2018
University of Colorado Boulder
2018
University of Exeter
2018
Bolin Centre for Climate Research
2018
Stockholm University
2018
GNS Science
2015-2018
Abstract. Re-examination of sediment cores from Deep Sea Drilling Project (DSDP) Site 277 on the western margin Campbell Plateau (paleolatitude ~65° S) has identified an intact Paleocene–Eocene (P–E) boundary overlain by a 34 cm thick record Thermal Maximum (PETM) within nannofossil chalk. The upper part PETM is truncated, either due to drilling disturbance or sedimentary hiatus. An onset indicated gradual decrease in δ13C values over 20 cm, followed 14 interval which 2 ‰ lighter than...
We present a suite of 15 palaeogeographic maps illustrating the geological evolution entirety Zealandia, from mid-Cretaceous to present, highlighting major tectonic phases, initial Gondwana rifting through development Neogene plate boundary. They illustrate palaeobathymetric and palaeofacies interpretations along with supporting datasets synthesis regional tectonics. The are underpinned by geologically-constrained structurally-based rigid retro-deformation block model. This model, tied...
Research Article| May 01, 2015 Early to middle Eocene magneto-biochronology of the southwest Pacific Ocean and climate influence on sedimentation: Insights from Mead Stream section, New Zealand Edoardo Dallanave; Dallanave † 1Department Earth Environmental Science, Ludwig-Maximilians University, Theresienstrasse 41, Munich D-80333, Germany †dallanave@geophysik.uni-muenchen.de Search for other works by this author on: GSW Google Scholar Claudia Agnini; Agnini 2Department Geosciences,...
We present a mid-Late Cretaceous to day tectonic reconstruction model for Aotearoa-New Zealand. Our GPlates comprises 50 rigid crustal blocks grouped into regions with common deformation histories set within well-defined Australia-Pacific-Antarctica plate circuit tied published global paleomagnetic absolute reference frame. Within the model, four distinct periods of are recognised from both near- and far-field observations. A key assumption is continuity basement terranes between North South...
The Upper Cretaceous and Lower Paleogene sedimentary rocks at Tora, southeast Wairarapa, are considered to form a transitional succession within the East Coast Basin, containing elements of both siliciclastic north in eastern North Island pelagic south Marlborough. However, Tora is complicated by rapid lateral facies changes, numerous unconformities unusual occurrences coarse-grained what more typically rather monotonous fine-grained passive-margin sequence. We interpret uppermost Paleocene...
Abstract. The New Zealand subantarctic islands of Auckland and Campbell, situated between the subtropical front Antarctic Convergence in Pacific sector Southern Ocean, provide valuable terrestrial records from a globally important climatic region. Whilst show clear evidence past glaciation, timing mechanisms behind Pleistocene environmental climate changes remain uncertain. Here we present multidisciplinary study – including marine geomorphological surveys, extensive analyses sedimentary...
ABSTRACT The Southern Ocean plays a significant role in driving global climate–ocean–carbon dynamics. Unfortunately, relative dearth of datasets across the region limits our ability to understand past and future mechanisms change. Here we report new dataset from south‐west Pacific: radiocarbon‐dated subfossil tree stumps ( Dracophyllum ) eroding out peat exposures on Campbell Auckland Islands (52–50°S). are southernmost growing trees Pacific their growth exposed sites at altitude is strongly...
Abstract The East Coast Basin (ECB), New Zealand, preserves the most complete onshore stratigraphic record of Cretaceous–Neogene development Zealandia from Gondwana breakup, through rift-drift, to evolution modern Hikurangi subduction margin and Pacific-Australia plate boundary. As such, it provides important constraints for southwest Pacific tectonic reconstructions. basin is, however, deformed variably dismembered, in previous models has been treated as a zone poorly constrained...
The Dorchap Dyke Swarm hosts the first recorded occurrence of lithium–caesium–tantalum (LCT) pegmatites in Victoria, Australia. Syn-orogenic emplacement pegmatite dykes occurred along a northwest-trending shear system during Benambran Orogeny. Pegmatites are derived from fractionated melt associated with Mount Wills Granite, which is an S-type, peraluminous granite originating supracrustal melting Ordovician sedimentary sequences. A distinct, eastward-oriented fractionation trend across has...
Abstract The logarithmic helicospiral has been the most widely accepted model of regularly coiled molluscan form since it was proposed by Moseley and popularized Thompson Raup. It is based on an explicit assumption that shells are isometric grow exponentially, implicit external shell follows internal shape, which implies parameters spiral could be reconstructed from whorl profile. In this contribution, we show these assumptions fail all 25 gastropod species examine. Using a dataset 176...
Reconstructions of the past relative positions northern and southern Zealandia provide important constraints on orientation amount strain accumulated between rigid plates within Australia–Pacific plate tectonic circuit. This configuration ultimately determines how, where when sedimentary basins formed during since continental breakup along eastern margin Gondwana. Although first-order geometry is well established, uncertainty remains regarding motions through latest Cretaceous to Eocene....
Abstract. Re-examination of a sediment core collected by the Deep Sea Drilling Project (DSDP Site 277) on western margin Campbell Plateau, Southwest Pacific Ocean (paleolatitude ∼ 65° S), has identified an intact Paleocene–Eocene (P–E) boundary overlain 34 cm-thick record initial phase Thermal Maximum (PETM) within nannofossil chalk. The upper part PETM is truncated, either due to drilling disturbance or sedimentary hiatus. An onset indicated gradual decrease in δ13C values over 20 cm,...
Abstract. The New Zealand subantarctic islands of Auckland and Campbell, situated between the Subtropical Front Antarctic Convergence in Pacific sector Southern Ocean, provide valuable terrestrial records from a globally-important climatic region. Whilst show clear evidence past glaciation, timing mechanisms behind Pleistocene environmental climate changes remain uncertain. Here we present multidisciplinary study – including marine geomorphological surveys, extensive analyses sedimentary...
Late Cretaceous – Eocene marine successions in the East Coast Basin, New Zealand, are dominated by thick, lithologically homogenous siliceous to moderately calcareous mudstones of Whangai and Wanstead formations. In many localities, this sequence is interrupted Paleocene highly prospective organic-rich source rocks Waipawa organofacies. The importance these understanding Zealand's petroleum systems well recognized; however, depositional controls on their formation not yet constrained. We...