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68 results for “Hikurangi margin”
New Zealand Hikurangi Margin temperature and pressure loggers - data sets.
<p>Description of data</p> <p>In 2019, 14 RBR data loggers were purchased as a supplement to an existing NSF grant, and were tested, calibrated, and deployed on the Hikurangi Subduction Zone margin as part of the Evan Solomon (UW) deployment of flow meters at this site. The purpose of the Solomon pore fluid analysis program was to determine the impact of Slow Slip Tectonic Events on near-surface fluid flow for this active margin. The purpose of the supplemental RBR loggers, attached directly to fluid flow meters, was to add the key components of pressure and temperature to this data set and specifically to identify any sediment slope failures and turbidity flows that occur during the two year deployment period.</p> <p>By May 6, 2021, all of the Solomon flow meters have been recovered with the attached UW supplemental RBR loggers. The loggers were be subjected to a final ice bath calibration test prior to data-download in New Zealand and all T/P data will be returned to UW via internet. The physical data loggers were then be returned to UW via air freight.</p> <p>The data in these Zenodo data archive files include all of the pre-cruise and post-cruise calibrations fro the RBR T/P loggers, the raw and calibrated data, and the locations of the stations. Also included are some infrastructure information including a multi-channel seismic profile showing that locations on the Hikurangi margin with known fault zones, and a published catalogue of earthquakes that occurred during the logger deployment period.</p> <p> </p>
Chesley et al., 2023 - Southern Hikurangi Margin Electromagnetic Data from HT-RESIST trench-crossing profile
<p>Chesley_etal_2023_South-Hikurangi-EM-data.txt contains controlled-source electromagnetic data and magnetotelluric data from the southern trench-crossing profile of the Hikurangi Trench Regional Electromagnetic Survey to Image the Subduction Thrust (HT-RESIST) project (see https://emlab.ldeo.columbia.edu/index.php/category/ht-resist/ for information regarding the survey). Chesley_etal_2023_South-Hikurangi-bathymetry.txt is the associated bathymetry file. </p>
A legacy of submarine slope failure in seismic reflection data along the active Hikurangi Margin, Aotearoa New Zealand
<p><span>We present a database that documents mass transport deposits (MTDs) in 32 marine geophysical surveys, encompassing >38,000 line-km of 2D seismic profiles. We map and characterise 737 MTDs, showing variations in size, location and style of failure, which we attribute to changes in geomorphic setting from north to south. MTDs in the northern Hikurangi margin, characterised by a high taper wedge and seamount subduction, show a broad range in size, with the highest proportion of MTDs displaying blocky or intact internal architecture. The central margin, characterised by lower wedge taper, hosts the most MTDs (51%), albeit with the thinnest (on average) and clustering within interridge basins. The southern Hikurangi margin hosts widespread submarine canyons and the largest (on average) MTDs, based on area and thickness. We demonstrate the importance of seismic archives in providing new insights into MTD preservation and discuss the bias between seafloor geomorphology and subseafloor seismic data in quantifying MTD occurrence. Our findings support the interrogation of the varied and complex causes of submarine landslides along active margins generally, as well as regions prone to cascading geohazards and landslide-induced tsunami. </span></p>
2D P-wave velocity model of the northern Hikurangi margin.
<p>You should find three files attached that include (1) a table that maps x-coordinates to longitude/latitude, (2) the Vp model with columns for x, depth, and Vp, and (3) a table of interfaces that include the topography (value 1) and the Moho (value 2). The zero x coordinate is arbitrarily the location of the westernmost shot in the Bay of Plenty from the SHIRE seismic survey of 2017, so x values range from ~190 to 400 km.</p> <p>This P-wave velocity model is presented in: Gase, Andrew C., et al. "Crustal structure of the northern Hikurangi margin, New Zealand: Variable accretion and overthrusting plate strength influenced by rough subduction." <em>Journal of Geophysical Research: Solid Earth</em> 126.5 (2021): e2020JB021176.</p>
HOBITSS earthquake catalog 2014-2015, Hikurangi margin, New Zealand
<p>We include here the full catalog of microearthquake seismicity using the Hikurangi Ocean Bottom Investigation of Tremor and Slow Slip” (HOBITSS) experiment. This catalog is part of a paper submitted to JGR in December 2018. Full catalog details are included in the main manuscript, and the results are considered preliminary until the paper is published</p> <p>Yarce2019_catalog_events.dat file has a more clean up version from the previous one, it states number of P and S phases separately and the total amount of arrivals. It also shows the time in Date Time format in addition to the epoch time format that was already in.</p> <p>[October 10, 2022] We have included the file Yarce2019_catalog_arrivals.csv that contains the arrival data of P and S wave arrivals for the events in the catalog. The last version of the catalog (v3) remained unmodified.</p>
Fig. 38 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 38. Light micrographs showing overview and details of Echinoderes juliae Sørensen et al., 2018. A, C. ♀ (NHMD- 921719). B, D. ♂ (NHMD- 921729). E. ♂ (NHMD- 921721). A. Dorsal overview. B. Segments 1 to 5, dorsal view. C. Segments 1 to 6, ventral view. D. Segments 9 to 11, dorsal view. E. Segments 8 to 11, lateroventral view. Abbreviations: see Material and methods.
Fig. 33 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 33. Light micrographs showing overview and details of Echinoderes sp. aff. E. balerioni, ♂ (NHMD-921971). A. Ventral overview. B. Segments 1 to 5, dorsal view. C. Segments 1 to 5, ventral view. D. Segments 2 to 5, dorsal view. E. Segments 10 to 11, dorsal view. F. Segments 6 to 10, dorsal view. G. Segments 6 to 10, ventral view. H. Segments 10 to 11, ventral view. Abbreviations: see Material and methods.
Fig. 30 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 30. Light micrographs showing overview and details of Echinoderes galadrielae sp. nov. A. ♀, paratype (NHMD-921497). B–C. ♀, holotype (NIWA-159425). D. ♀, paratype (NHMD-921496). E. ♀, paratype (NIWA-159426). A. Ventral overview, with inset showing close-up of segment 11. B. Segments 1 to 5, dorsal view. C. Segments 1 to 7, ventral view. D. Segments 6 to 8, lateral view. E. Segments 8 to 11, lateral view. Abbreviations: see Material and methods.
Fig. 34 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 34. Light micrographs showing overview and details of Echinoderes sp. aff. E. lupherorum. A–C. ♂ (NHMD-921636). D. ♂ (NHMD-921635). E. ♀ (NHMD-921632). A. Lateroventral overview, with inset showing close-up of segment 11. B. Segments 1 to 6, dorsolateral view. C. Segments 4 to 9, dorsolateral view. D. Segments 8 to 11, dorsal view. E. Segments 6 to 9, lateroventral view. Abbreviations: see Material and methods.
Fig. 28 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 28. Scanning electron micrographs showing overviews and details of Echinoderes aragorni sp. nov. A. Lateral overview. B. Segments 1 to 2, dorsolateral view. C. Segments 1 to 5, ventral view. D. Segments 3 to 5, dorsolateral view. E. Segments 3 to 6, lateral view. F. Ventral overview. G. Segments 5 to 7, dorsolateral view. H. Segments 5 to 7, ventral view. I. Segments 4 to 6 of male, dorsolateral view. J. Segments 9 to 10, dorsal view. K. Segments 10 to 11 of female, dorsal view. L. Segments 10 to 11 of male, dorsal view. M. Segments 7 to 8, dorsolateral view. N. Segments 7 to 9, ventral view. Abbreviations: see Material and methods.
Fig. 37 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 37. Scanning electron micrographs showing overviews and details of Echinoderes sp. aff. E. unispinosus. A. Lateral overview. B. Segments 1 to 3, subdorsal view. C. Segments 1 to 3, lateral view. D. Segments 4 to 6, subdorsal view. E. Segments 1 to 3, lateroventral view. F. Lateral overview. G. Segments 5 to 7, lateroventral view. H. Segments 6 to 8, laterodorsal view. I. Segments 10 to 11 of male, dorsal view. J. Segments 9 to 11, ventrolateral view. K. Segments 9 to 11 of female, laterodorsal view. Abbreviations: see Material and methods.
Fig. 27 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 27. Light micrographs showing overview and details of Echinoderes aragorni sp. nov. A–B, D–F. ♀, holotype (NIWA-159423). C. ♀, paratype (NIWA-159424). A. Dorsal overview. B. Segments 1 to 6, dorsal view. C. Segments 1 to 6, ventral view. D. Ventral overview. E. Segments 5 to 9, dorsal view. F. Segments 7 to 11, ventral view. Abbreviations: see Material and methods.
Fig. 26 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 26. Line art illustrations of Echinoderes aragorni sp. nov. A. ♀, dorsal view. B. ♀, ventral view. C. ♂, segments 10–11, dorsal view. D. ♂, segments 10–11, ventral view. Abbreviations: see Material and methods.
Fig. 25 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 25. Scanning electron micrographs showing overviews and details of Echinoderes legolasi sp. nov. A. Lateral overview. B. Segments 1 to 4, dorsolateral view. C. Segments 6 to 9, lateral view. D. Ventral overview. E. Segments 6 to 10, dorsal view. F. Segments 5 to 7, dorsal view. G. Segments 8 to 11, dorsal view. H. Segments 10 to 11, dorsal view. Abbreviations: see Material and methods.
Fig. 23 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 23. Line art illustrations of Echinoderes legolasi sp. nov. A. ♂, dorsal view. B. ♂, ventral view. Abbreviations: see Material and methods.
Fig. 29 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 29. Line art illustrations of Echinoderes galadrielae sp. nov. A. ♀, dorsal view. B. ♀, ventral view. C. ♂, segments 10–11, dorsal view. D. ♂, segments 10–11, ventral view. Abbreviations: see Material and methods.
Fig. 20 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 20. Line art illustrations of Echinoderes samwisei sp. nov. A. ♂, dorsal view. B. ♂, ventral view. C. ♀, segments 10–11, dorsal view. D. ♀, segments 10–11, ventral view. Abbreviations: see Material and methods.
Fig. 19 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 19. Scanning electron micrographs showing overviews and details of Echinoderes frodoi sp. nov. A. Lateral overview. B. Ventral overview. C. Segments 4 to 8, laterodorsal view. D. Dorsal overview. E. Segments 1 to 4, laterodorsal view. F. Segments 2 to 6, lateral view. G. Segments 8 to 10 of male, lateral view. H. Segments 9 to 11 of female, laterodorsal view. Abbreviations: see Material and methods.
Fig. 18 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 18. Light micrographs showing overview and details of Echinoderes frodoi sp. nov. A, C (closeup). ♂, holotype (NIWA-159414). B–D, F. ♀, paratype (NHMD-916336). E. ♀, paratype (NHMD-916335). G–H. ♂, paratype (NIWA-159416). A. Ventral overview. B. Segments 1 to 8, dorsal view. C. Segments 1 to 8, ventral view with close-up showing midlateral tube on segment 1. D. Segments 9 to 10, dorsal view. E. Segments 8 to 10, ventral view. F. Segments 10 to 11, ventral view. G. Segments 9 to 10, lateral view. H. Segments 10 to 11, lateral view. Abbreviations: see Material and methods.
Fig. 17 in Echinoderes (Kinorhyncha: Cyclorhagida) from the Hikurangi Margin, New Zealand
Fig. 17. Line art illustrations of Echinoderes frodoi sp. nov. A. ♂, dorsal view. B. ♂, ventral view. C. ♀, segments 10–11, dorsal view. D. ♀, segments 10–11, ventral view. Abbreviations: see Material and methods.
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