PANGAEA_952352 Project ISOLDE: DEPAS ocean-bottom seismometer operations around Tristan da Cunha in 2012-2013 Geissler, Wolfram H; Jokat, Wilfried; Jegen-Kulcsar, Marion; Schmidt-Aursch, Mechita Project ISOLDE: DEPAS ocean-bottom seismometer operations around Tristan da Cunha in 2012-2013 2022-12-15 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.952352 Investigator Wolfram H Geissler wolfram.geissler@awi.de Earth Science Event label Optional event label Project Principal investigator Code Station label Date/time start LATITUDE LONGITUDE ELEVATION Date/time end Clock skew Recorder type Recorder, serial number Seismometer type Seismometer, serial number Seismometer gain Hydrophone type Hydrophone, serial number Hydrophone gain Hydrophone polarity Sampling rate Cruise/expedition Comment Binary Object geoscientificInformation 1D_TDC01 1D_TDC02 1D_TDC03 1D_TDC04 1D_TDC05 1D_TDC06 1D_TDC07 1D_TDC08 1D_TDC09 1D_TDC10 1D_TDC11 1D_TDC12 1D_TDC14 1D_TDC15 1D_TDC16 1D_TDC18 1D_TDC19 1D_TDC20 1D_TDC22 1D_TDC23 1D_TDC26 MSM20/020-2, MSM24_830-1 MSM20/021-2, MSM24_831-1 MSM20/022-2, MSM24_832-1 MSM20/023-2, MSM24_833-1 MSM20/024-2, MSM24_842-1 MSM20/025-2, MSM24_834-2 MSM20/026-2, MSM24_835-1 MSM20/027-2, MSM24_836-2 MSM20/027-2, MSM24_837-1 MSM20/028-2, MSM24_838-1 MSM20/029-2, MSM24_839-2 MSM20/030-2, MSM24_840-1 MSM20/031-2, MSM24_843-1 MSM20/033-2, MSM24_854-1 MSM20/035-2, MSM24_853-1 MSM20/037-2, MSM24_844-1 MSM20/038-2, MSM24_845-2 MSM20/039-2, MSM24_852-1 MSM20/041-2, MSM24_850-1 MSM20/042-1, MSM24_849-1 MSM20/046-2, MSM24_846-1 Ocean bottom seismometer 2012-01-02 2012-01-29 Complete -38.9018 -35.6429 -14.721699999999998 -9.6875 -4169.0 m a.s.l. (ELEVATION) -3099.0 m a.s.l. (ELEVATION) AWI_GeoPhy Marine Geophysics @ AWI SPP1375 Priority Programme 1375 SAMPLE: South Atlantic Margin Processes and Links with Onshore Evolution unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 484 data points text/tab-separated-values Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung; et al. (2017): DEPAS (Deutscher Geräte-Pool für amphibische Seismologie): German Instrument Pool for Amphibian Seismology. Journal of large-scale research facilities JLSRF, 3, https://doi.org/10.17815/jlsrf-3-165 Bonadio, Raffaele; Geissler, Wolfram H; Lebedev, Sergei; Fullea, Javier; Ravenna, Matteo; Celli, Nicolas L; Jokat, Wilfried; Jegen, Marion; Sens-Schönfelder, Christoph; Baba, Kiyoshi (2018): Hot Upper Mantle Beneath the Tristan da Cunha Hotspot From Probabilistic Rayleigh-Wave Inversion and Petrological Modeling. Geochemistry, Geophysics, Geosystems, 19(5), 1412-1428, https://doi.org/10.1002/2017GC007347 Geissler, Wolfram H (2014): Electromagnetic, gravimetric and seismic measurements to investigate the Tristan da Cunha hot spot and its role in the opening of the South Atlantic Ocean (MARKE) - Cruise No. MSM24 - December 27, 2012 - January 21, 2013 - Walvis Bay (Namibia) - Cape Town (South Africa). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, MSM24, 56 pp, https://doi.org/10.2312/cr_msm24 Geissler, Wolfram H; Jokat, Wilfried; Jegen, Marion; Baba, Kiyoshi (2017): Thickness of the oceanic crust, the lithosphere, and the mantle transition zone in the vicinity of the Tristan da Cunha hot spot estimated from ocean-bottom and ocean-island seismometer receiver functions. Tectonophysics, 716, 33-51, https://doi.org/10.1016/j.tecto.2016.12.013 Jegen-Kulcsar, Marion; Geissler, Wolfram H; Maia, Marcia; Baba, Kiyoshi; Kirk, Henning (2015): TRISTAN: Electromagnetic, gravimetric and seismic measurements to investigate the Tristan da Cunha hot spot and its role in the opening of the South-Atlantic - Cruise No. MSM20/2 - January 17 - February 15, 2012 - Walvis Bay (Namibia) - Recife (Brazil). MARIA S. MERIAN-Berichte, DFG-Senatskommission für Ozeanographie, MSM20/2, 52 pp, https://doi.org/10.2312/cr_msm20_2 Ryberg, Trond; Geissler, Wolfram H; Jokat, Wilfried; Pandey, S (2017): Uppermost mantle and crustal structure at Tristan da Cunha derived from ambient seismic noise. Earth and Planetary Science Letters, 471, 117-124, https://doi.org/10.1016/j.epsl.2017.04.049 Schlömer, Antje; Geissler, Wolfram H; Jokat, Wilfried; Jegen, Marion (2017): Hunting for the Tristan mantle plume – An upper mantle tomography around the volcanic island of Tristan da Cunha. Earth and Planetary Science Letters, 462, 122-131, https://doi.org/10.1016/j.epsl.2016.12.028 Schlömer, Antje; Geissler, Wolfram H; Jokat, Wilfried; Jegen, Marion (2017): Seismicity in the Vicinity of the Tristan Da Cunha Hot Spot: Particular Plate Tectonics and Mantle Plume Presence. Journal of Geophysical Research: Solid Earth, 122(12), 10,427-10,439, https://doi.org/10.1002/2017JB015017 Zhang, Hao; Geissler, Wolfram H; Schmidt-Aursch, Mechita; Bonadio, Raffaele (2022): Crustal and uppermost mantle structure beneath Tristan da Cunha using surface wave phase velocity from horizontal components OBS ambient seismic noise. Geophysical Journal International, 232(2), 1276-1292, https://doi.org/10.1093/gji/ggac390

According to classic plume theory, the Tristan da Cunha mantle plume played a major role in the rifting of the South Atlantic margins by impinging at the base of the continental lithosphere shortly before or during the breakup of the South Atlantic. Onshore the Tristan mantle plume is associated with the emplacement of the Parana-Etendeka flood basalt province ~132 Ma, and offshore with the age-progressive Walvis Ridge and associated young seamount province. The global data is lacking coverage and therefore resolution around the Tristan da Cunha for shallower mantle depths. The search for deep-reaching geophysical/thermal anomalies beneath Tristan da Cunha was the starting point for a multi-disciplinary geophysical experiment to acquire passive marine electromagnetic, seismic and bathymetric data within the framework of the SPP-1375 “South Atlantic Margin Processes and Links with onshore Evolution” (SAMPLE) funded by the German Science foundation. The experiment included two expeditions with the German research vessel MARIA S. MERIAN in 2012 and 2013. Between February 2012 and January 2013, a network of 24 ocean bottom seismometers (OBS) from the German DEPAS pool (Deutscher Geräte-Pool für Amphibische Seismologie) and 26 ocean-bottom magneto-telluric stations from GEOMAR Kiel and the University of Tokyo were deployed around the archipelago of Tristan da Cunha. The seismological stations are equipped with a Güralp CMG-40T wideband seismometer (60 s) incorporated in a titanium pressure housing, a hydrophone, and a GEOLON MCS (Marine Compact Seismocorder) data logger from SEND GmbH Hamburg, Germany. Each sensor channel is sampled at 50 Hz (2 OBS at 100 Hz), preamplifier gain of the hydrophone channel is 4 and 1 for the three seismometer components. The seismometers are connected to a cardanic levelling mechanism, which was activated every 21 days to level the sensors. Based on previous experiments and triangulation of some stations, the accuracy of the positions is estimated to 500 m. To complement the ocean-bottom network and the existing observatory on Tristan da Cunha (TRIS), two land seismometers and one magnetotelluric station were installed on Nightingale Island located southwest of the main island each of which was equipped with a Güralp-3ESP seismometer (60 s) and an EarthData data logger. As recording parameters, we chose 100 Hz sampling rate and low preamplifier gain (0.4). One of the stations (NIG01) recorded earthquake data for the entire year, while the second station failed after few days due to water damage. Unfortunately, the permanent station TRIS failed also during the experiment. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.952352"!

http://en.wikipedia.org/wiki/Elevation ELEVATION http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 Date/time end http://en.wikipedia.org/wiki/ISO_8601 Date/time start https://doi.org/10.1002/2017GC007347 Hot Upper Mantle Beneath the Tristan da Cunha Hotspot From Probabilistic Rayleigh-Wave Inversion and Petrological Modeling https://doi.org/10.1002/2017JB015017 Seismicity in the Vicinity of the Tristan Da Cunha Hot Spot: Particular Plate Tectonics and Mantle Plume Presence https://doi.org/10.1016/j.epsl.2016.12.028 Hunting for the Tristan mantle plume – An upper mantle tomography around the volcanic island of Tristan da Cunha https://doi.org/10.1016/j.epsl.2017.04.049 Uppermost mantle and crustal structure at Tristan da Cunha derived from ambient seismic noise https://doi.org/10.1016/j.tecto.2016.12.013 Thickness of the oceanic crust, the lithosphere, and the mantle transition zone in the vicinity of the Tristan da Cunha hot spot estimated from ocean-bottom and ocean-island seismometer receiver functions https://doi.org/10.1093/gji/ggac390 Crustal and uppermost mantle structure beneath Tristan da Cunha using surface wave phase velocity from horizontal components OBS ambient seismic noise https://doi.org/10.17815/jlsrf-3-165 DEPAS (Deutscher Geräte-Pool für amphibische Seismologie): German Instrument Pool for Amphibian Seismology https://doi.org/10.2312/cr_msm20_2 TRISTAN: Electromagnetic, gravimetric and seismic measurements to investigate the Tristan da Cunha hot spot and its role in the opening of the South-Atlantic - Cruise No. MSM20/2 - January 17 - February 15, 2012 - Walvis Bay (Namibia) - Recife (Brazil) https://doi.org/10.2312/cr_msm24 Electromagnetic, gravimetric and seismic measurements to investigate the Tristan da Cunha hot spot and its role in the opening of the South Atlantic Ocean (MARKE) - Cruise No. MSM24 - December 27, 2012 - January 21, 2013 - Walvis Bay (Namibia) - Cape Town (South Africa) https://en.wikipedia.org/wiki/Clock_skew Clock skew https://www.awi.de/en/about-us/organisation/staff/single-view/wolfram-geissler.html https://www.awi.de/en/science/geosciences/geophysics.html AWI_GeoPhy DIF 9.4 2022-12-15 2026-07-15