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Crutchley, Gareth J (2022): 2D marine seismic reflection data during RV Tangaroa cruise TAN1808 from the southern Hikurangi subduction margin, New Zealand [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.952099

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Published: 2022-12-12 • DOI registered: 2023-02-02

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Abstract:
This submission provides processed seismic reflection data from Research Voyage TAN1808, which took place aboard RV Tangaroa between the 8th of September and the 5th of October, 2018. Raw data are lodged with the New Zealand Government (https://data.nzpam.govt.nz). The research voyage was aimed at characterizing gas hydrate systems on the southern Hikurangi margin of New Zealand, in the region offshore eastern New Zealand. Data were collected with NIWA's (New Zealand) multi-channel seismic reflection system and were processed using the Globe Claritas processing software. Full details of acquisition and processing are included in the voyage report (Crutchley et al. 2018: doi:10.21420/73WW-1W83) and other linked publications.
Keyword(s):
gas hydrates; Hikurangi Margin; New Zealand; Seismic reflection data; tectonics
Supplement to:
Crutchley, Gareth J; Hillman, Jess I T; Kroeger, Karsten F; Watson, Sally; Turco, Francesco; Mountjoy, Joshu J; Davy, Bryan; Wölz, Susanne (2023): Both Longitudinal and Transverse Extension Controlling Gas Migration Through Submarine Anticlinal Ridges, New Zealand's Southern Hikurangi Margin. Journal of Geophysical Research: Solid Earth, 128(6), e2022JB026279, https://doi.org/10.1029/2022JB026279
Related to:
Crutchley, Gareth J; Klaeschen, Dirk; Henrys, Stuart A; Pecher, Ingo A; Mountjoy, Joshu J; Wölz, Susanne (2020): Subducted sediments, upper-plate deformation and dewatering at New Zealand's southern Hikurangi subduction margin. Earth and Planetary Science Letters, 530, 115945, https://doi.org/10.1016/j.epsl.2019.115945
Crutchley, Gareth J; Mountjoy, Joshua; Hillman, Jess I T; Turco, Francesco; Watson, Sally; Flemings, Peter B; Davy, Bryan; Wölz, Susanne; Gorman, John; Bialas, Jörg (2021): Upward‐doming zones of gas hydrate and free gas at the bases of gas chimneys, New Zealand's Hikurangi margin. Journal of Geophysical Research: Solid Earth, 126(9), https://doi.org/10.1029/2020JB021489
Kroeger, Karsten F; Crutchley, Gareth J; Hillman, Jess I T; Turco, Francesco; Barnes, Philip (2022): Gas hydrate formation beneath thrust ridges: A test of concepts using 3D modelling at the southern Hikurangi Margin, New Zealand. Marine and Petroleum Geology, 135, 105394, https://doi.org/10.1016/j.marpetgeo.2021.105394
Turco, Francesco; Azevedo, Leonardo; Grana, Dario; Crutchley, Gareth J; Gorman, Andrew R (2021): Characterization of gas hydrate systems on the Hikurangi margin (New Zealand) through geostatistical seismic and petrophysical inversion. Geophysics, 86(6), R825-R838, https://doi.org/10.1190/geo2021-0018.1
Turco, Francesco; Crutchley, Gareth J; Gorman, Andrew R; Mountjoy, Joshu J; Hillman, Jess I T; Wölz, Susanne (2020): Seismic velocity and reflectivity analysis of concentrated gas hydrate deposits on the southern Hikurangi Margin (New Zealand). Marine and Petroleum Geology, 120, 104572, https://doi.org/10.1016/j.marpetgeo.2020.104572
Turco, Francesco; Ladroit, Yoann; Watson, Sally; Seabrook, Sarah; Law, Cliff S; Crutchley, Gareth J; Mountjoy, Joshu J; Pecher, Ingo A; Hillman, Jess I T; Wölz, Susanne; Gorman, Andrew R (2022): Estimates of Methane Release From Gas Seeps at the Southern Hikurangi Margin, New Zealand. Frontiers in Earth Science, 10, 834047, https://doi.org/10.3389/feart.2022.834047
Funding:
Ministry for Business Innovation and Employment, grant/award no. C05X1708: Opportunities and implications of energy extraction from gas hydrates
Coverage:
Median Latitude: -41.769228 * Median Longitude: 175.720742 * South-bound Latitude: -42.800167 * West-bound Longitude: 173.648173 * North-bound Latitude: -41.314048 * East-bound Longitude: 176.545434
Date/Time Start: 2018-09-10T19:00:00 * Date/Time End: 2018-10-04T10:00:00
Minimum Elevation: -2395.0 m * Maximum Elevation: -2105.0 m
Event(s):
TAN1808-01 * Latitude Start: -41.393253 * Longitude Start: 176.359854 * Latitude End: -41.314048 * Longitude End: 176.508240 * Date/Time Start: 2018-09-10T19:00:00 * Date/Time End: 2018-09-10T21:00:00 * Campaign: 61TG20180908 (TAN1808) * Basis: Tangaroa * Method/Device: Multichannel seismics (MCSEIS)
TAN1808-02 * Latitude Start: -41.474333 * Longitude Start: 176.184000 * Latitude End: -41.542833 * Longitude End: 176.083551 * Date/Time Start: 2018-09-11T02:00:00 * Date/Time End: 2018-09-11T03:00:00 * Campaign: 61TG20180908 (TAN1808) * Basis: Tangaroa * Method/Device: Multichannel seismics (MCSEIS)
TAN1808-03 * Latitude Start: -41.539701 * Longitude Start: 176.081525 * Latitude End: -41.827621 * Longitude End: 176.278633 * Date/Time Start: 2018-09-11T03:00:00 * Date/Time End: 2018-09-11T08:00:00 * Campaign: 61TG20180908 (TAN1808) * Basis: Tangaroa * Method/Device: Multichannel seismics (MCSEIS)
Comment:
All SEG-Y files have the following important binary header word definitions, required for loading data:
Start time: 2-byte integer: Bytes 105-106
Trace Sample Count: 2-byte integer: Bytes 115-116
Sample Interval (microseconds): 2-byte integer: Byte 117-118
CDP Number: 4-byte integer: Bytes 5-8
X location: 4-byte integer: Bytes 81-84 (Note: Coordinates are in metres of UTM Zone 60S, WGS84 Datum)
Y location: 4-byte integer: Bytes 85-88 (Note: Coordinates are in metres of UTM Zone 60S, WGS84 Datum)
Trace coordinates (ascii format file):
The file All_trace_coordinates.txt contains the coordinates of all traces in the corresponding SEG-Y files. These are useful for plotting lines in GIS software, for example. Note: All coordinates are also in the binary headers of the SEG-Y data.
The ascii file has the following four columns:
<Line Name> <CDP> <X coord (m; UTM Zone 60S)> <Y coord (m; UTM Zone 60S)>
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventCrutchley, Gareth J
2Date/Time of eventDate/TimeCrutchley, Gareth J
3Date/Time of event 2Date/Time 2Crutchley, Gareth J
4Latitude of eventLatitudeCrutchley, Gareth J
5Longitude of eventLongitudeCrutchley, Gareth J
6Latitude of event 2Latitude 2Crutchley, Gareth J
7Longitude of event 2Longitude 2Crutchley, Gareth J
8File contentContentCrutchley, Gareth J
9Binary ObjectBinaryCrutchley, Gareth J
10Binary Object (File Size)Binary (Size)BytesCrutchley, Gareth J
11Binary ObjectBinaryCrutchley, Gareth J
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
294 data points

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