NIWA - Metadata Catalogue
Keyword
seismic reflection marine geophysics
16 record(s)
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R/V Tangaroa
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R/V Tangaroa
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Multichannel seismic data from the "Wanganui Neotectonics - Back-arc Extension" voyage (3048) of the R/V Tangaroa. The voyage was undertaken as part of the "Extensional Back-arc Processes" project of the "Active Seabed Processes" FRST programme. The objectives of the programme are to determine the contemporaneous processes of extensional faulting, subsidence andc sedimentation in the Wanganui Bight and Bay of Plenty, to compare the mechanisims of extension, potential seismicity of offshore faluts, and the influence of sealevel cycles on sediment-tectonic interactions at opposite ends of the back-arc region of the Hikurangi subduction zone. Survey Leader: Scott Nodder Organisations: NIWA Seismic Instrument: 210 cu.in.,GI AIRGUN, 48 CHANNELS Navigation Instrument: GPS Ports: Wellington to Wellington
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R/V Tangaroa
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This cruise on the R/V Kaharoa is Phase 2 in an extensive survey to determine bottom habitats and biodiversity on the seabed substrate of the Inner Bay of Islands and Northland Shelf between the Poor Knights Islands the south and North Cape in the north. This voyage was completed as three separate legs, each with a different sampling focus: 1. bottom trawling for soft sediment finfish assemblages 2. CTD (water column) and multi-corer (sediments) samples 3. Deep Towed Imaging System (DTIS) was deployed across 54 stations
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Matakaoa Slide survey undertaken by the R/V Tangaroa
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R/V Tangaroa
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UNCLOS Eastern Region survey undertaken by the R/V Tangaroa
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MARGINZ R/V Tangaroa
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Multichannel seismic data from the "Poverty Re-entrant" voyage (TAN0106) of the R/V Tangaroa. The voyage investigated the origin of the Poverty Re-entrant - a large margin re-entrant oalong the continental shelf off Povert Bay. It has been suggested that the Poverty Re-entrant was formed by the oblique impact of a large seamount and by massive and catastrophic avalanching of marhin rocks shattered by passage of the seamount through the margin but the original structure might be masked by later deposition, compressio, accretion of avalanche deposits, and erosion by canyons. Its structure may be further complicated by relatively recent seamount impacts. Survey Leader: Keith Lewis Organisations: NIWA Seismic Instrument: 45/105 CU.IN. GI AIRGUN, 48-channels, Uniboom Navigation Instrument: DGPS Ports: Wellington to Tauranga