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  • This layer contains depth information in gridded format captured by multibeam sonar in 2016/17 as part of HS52 - Approaches to Auckland. The data was collected for Toitū Te Whenua Land Information New Zealand (LINZ) and for which the survey took place from 26 October 2016 to 17 February 2017. Data management and distribution is by LINZ. Data comprises a gridded depth model as tif or ascii tiles in UTM projection. Vertical accuracy is +/- 0.2m (95%) Horizontal accuracy is +/- 0.5m (95%) Vertical datum is Approximate Lowest Astronomical Tide. The source data used to create the depth model may be of a higher resolution/density than the model. This data can be supplied on request and resolutions be discovered through the [NZ Bathymetric Surface model Index](https://data.linz.govt.nz/layer/95574-nz-bathymetric-surface-model-index/).

  • The database is the master record for the various GNS databases covering boreholes of any type drilled with the NZ territory, out to edge of the ECS/EEZ. It covers borehole metadata, sampling information, bibliographic references,geophysical, geotechnical, and geochemical data. It also covers physical holdings of core, chip, fluid and gas samples held by GNS and MBIE

  • The dataset supports the Geochemical Atlas of Aotearoa New Zealand (Martin et al. 2023) that highlights the variation in trace element concentrations in near-surface soil materials across Te Ika-a-Māui North Island, Te Waipounamu South Island and Rakiura Stewart Island. Samples were sourced from previous studies, collated from 833 sites from the top 30 cm (maximum) of soil by hand auger from across Aotearoa New Zealand. All samples were dried and sieved to <2 mm, and 15 g aliquots were analysed for a suite of 65 elements (Ag, Al, As, Au, B, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Hg, Ho, In, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, P, Pb, Pd, Pr, Pt, Rb, Re, S, Sb, Sc, Se, Sm, Sn, Sr, Ta, Tb, Te, Th, Ti, Tl, Tm, U, V, W, Y, Yb, Zn and Zr) using inductively coupled plasma mass spectrometry (ICP-MS) on aqua regia digests. The dataset contains Inverse Distance Weighted (IDW) GIS grids of the 65 elements and a polygon GIS feature layer based on the 1:250 000 Geological Map of New Zealand (2020) with mean concentrations of 65 elements for ~230 rock groups across the country. The sample locations have been collapsed to StatisticsNZ meshblock polygons in a point GIS feature layer and a spreadsheet table to protect privacy. These grids and feature layers enable an understanding of the geochemical composition and spatial variation of Aotearoa New Zealand's soils attributable to natural (geogenic) and human (anthropogenic) influences. The supporting publication is: Martin AP, Turnbull RE, Roudier P, Cavanagh J, Rattenbury MS, Rogers KM, Vandergoes MJ, Reyes L, Gard HJL, Richardson SJ, et al. 2023. Geochemical atlas of Aotearoa New Zealand. Lower Hutt (NZ): GNS Science. 247 p. (GNS Science report; 2023/23). https://doi.org/10.21420/p9bk-7016

  • This is the offshore dataset of a large onshore-offshore seismic experiment on the Hikurangi margin of North Island, New Zealand, with a team of scientists from New Zealand, the United States, and Japan. This data acquisition was part of the SHIRE project (“Seismogenesis at Hikurangi Integrated Research Experiment”) and occurred in 2017. The goals of this Earth science project were: 1) to obtain constraints on the deep structure of the Hikurangi margin, with an emphasis on Raukumara peninsula in the north, and 2) to record seismicity over several months. During the marine seismic experiment, we used the acoustic source and streamer of the US academic research vessel R/V Marcus Langseth (voyage MGL1708) to gather marine seismic reflection and refraction data. The R/V Tangaroa took part in a voyage undertaking OBS operations in cooperation with this, deploying and recovering a fleet of 100 short-period ocean-bottom seismometers (OBSs) from the Japan Agency for Marine-Earth Science and Technology (JAMSTEC). Voyage TAN1710’s deployed and recovered OBSs at 114 sites along four major lines. SHIRE Line 1 is oriented NW–SE between the Bay of Plenty and the northern Hikurangi Trough. Land seismometers on the Raukumara peninsula section of this transect recorded the Langseth source as well. SHIRE Line 2 is a margin-crossing transect on the southern Hikurangi margin, while Line 3 and Line 4 are two margin-parallel lines on the continental shelf and on the Hikurangi Plateau, respectively. After the R/V Marcus Langseth started surveying these geophysical transects, 21 of the instruments from Lines 1 and 3 were repositioned on SHIRE Line 4.

  • The dataset supports a geochemical atlas of Wellington (Morgenstern et al. 2024) and shows the abundance and variability of element concentrations within surficial soil material across the study area. Sampling was undertaken between December 2022 and April 2023 at 151 sites across an area spanning from Paekākāriki and the Remutaka Road Summit to the southern coastline, and from the Remutaka Ranges to the western coastline. Highly urbanised land (domestic and commercial properties) was sampled, as well as a variety of other, more natural land use types (native regenerating park, native park, exotic park, exotic forest, agricultural pasture) for comparison. At each site, two samples were collected using a hand auger: the upper O-depth (0–2 cm) and a shallow A-depth (2–20 cm). Several deeper B-depth (50–70 cm) samples were also collected for statistical analysis. Samples were dried, sieved to <2 mm and split into 15 g sample sizes, before being analysed for a suite of 65 elements (Ag, Al, As, Au, B, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Hg, Ho, In, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, P, Pb, Pd, Pr, Pt, Rb, Re, S, Sb, Sc, Se, Sm, Sn, Sr, Ta, Tb, Te, Th, Ti, Tl, Tm, U, V, W, Y, Yb, Zn and Zr) using aqua regia digestion and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Most analytes have all or most measured values above their lower method detection limit and analytical results have undergone comprehensive quality assurance and quality control, and are internally consistent and in line with typical worldwide concentration ranges of the analytes. The data are available in two forms; a spreadsheet of element concentrations for all depths sampled with sample locations collapsed to StatisticsNZ 2024 meshblocks to protect privacy and a zipped ArcGIS geodatabase of Inverse Distance Weighted (IDW) grids for each of the 65 elements. Morgenstern R, Martin AP, Turnbull RE, Norton K, Rattenbury MS, Rogers KM. 2024. Urban Geochemical Atlas of Wellington, New Zealand. Lower Hutt (NZ): GNS Science. 128 p. (GNS Science report; 2024/01). https://doi.org/10.21420/8adh-f354

  • This is the data collected by a major controlled-source and passive seismic imaging experiment, the Seismic Array HiKurangi Experiment (SAHKE). The SAHKE project was designed to investigate the physical parameters controlling locking at the plate boundary beneath the southern North Island and characterise slip processes in a major segment of the Hikurangi system. The components of data were acquired between November 2009 and April 2010 by GNS Science, Victoria University of Wellington, and Earthquake Research Institute (University of Tokyo, Japan) in conjunction with Ministry of Economic Development, Crown Minerals. 480 km of marine multichannel seismic data were acquired on 3 SAHKE profiles off the east and west coasts of the southern North Island and recorded by 36 short-period, 10 broadband and 20 ocean bottom seismometers along a single transect line. Additional offshore shot lines were recorded by 9 short-period seismometers in a north-south profile line, on the western margin, and 13 short-period seismometers on two profile lines on the eastern margin of the lower North Island. Additionally, 69000 offshore airgun sources were recorded by 48 short-period and two broadband seismometers distributed in a dispersed array during the recording of 2800 km of the Pegasus Basin survey. This same distributed array recorded local and teleseismic earthquakes over a 4 month period.