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  • 1
    Online Resource
    Online Resource
    Birth of an intraoceanic spreading center (2008)
    Associated volumes
    Details Availability
    In: Geology, Boulder, Colo. : Soc., 1973, 36(2008), 10, Seite 767-770, 0091-7613
    In: volume:36
    In: year:2008
    In: number:10
    In: pages:767-770
    Description / Table of Contents: The Cocos-Nazca spreading center is one of the few examples of the formation of a spreading center by splitting of oceanic lithosphere. It was created when the Farallon plate broke up in the early Miocene following the collision of the Pacific-Farallon spreading center with the North American continent. Much of the ancient Farallon plate corresponding to the area of opening is lost to subduction beneath Central America and South America, but new data from the conjugate area on the Pacific plate allow the first detailed reconstruction of the break-up process. The opening began after chron 7 (25 Ma) at a location of focused crustal extension caused by overlapping spreading centers that had evolved in response to a slight reorientation of a Pacific-Farallon ridge segment. Beginning at chron 6B (22.7 Ma), eastward progressing seafloor spreading started along an axis that most likely migrated toward the region of weak lithosphere created by the Galapagos hotspot. By chron 6 (19.5 Ma), plate splitting from the spreading center to the trench was complete, allowing the fully detached Cocos and Nazca plates to move independently. This kinematic change resulted in a significant ridge jump of the newly established Pacific-Nazca spreading center, a change in plate motion direction of the Nazca plate by 20° clockwise, and a large increase in Pacific-Cocos plate velocity in the middle Miocene.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 0091-7613
    DOI: 10.1130/G25056A.1
    Language: English
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  • 2
    Article
    Article
    Convergent margin tectonics: A marine perspective (2007)
    Associated volumes
    Details Availability
    In: Central America ; Vol. 1, London [u.a.] : Taylor & Francis, 2007, (2007)
    In: year:2007
    Type of Medium: Article
    Pages: 26 S. , Ill., graph. Darst., Kt.
    Language: English
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  • 3
    Online Resource
    Online Resource
    The trace of the Pacific-Cocos-Nazca triple junction in the Central Pacific and the formation of an overlapping spreading centre (2008)
    Associated volumes
    Details Availability
    In: Terra nova, Oxford : Blackwell Scientific Publ., 1989, 20(2008), 3, Seite 246-251, 0954-4879
    In: volume:20
    In: year:2008
    In: number:3
    In: pages:246-251
    Type of Medium: Online Resource
    ISSN: 0954-4879
    DOI: 10.1111/j.1365-3121.2008.00812.x
    Language: English
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  • 4
    Online Resource
    Online Resource
    Kinematik der Plattenbewegungen im zentralen Pazifik an der Wende Oligozän/Miozän : CENTRAL ; SONNE-Fahrt SO-180 ; fachlicher Abschlussbericht ; Laufzeit: 01.08.2004 - 30.09.2006 (2007)
    Hannover : BGR [u.a.]
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: Online-Ressource (67 S., 3,47 MB) , graph. Darst., Kt.
    URL: https://edocs.tib.eu/files/e01fb07/52962978X.pdf
    URL: https://doi.org/10.2314/GBV:52962978X
    URL: https://edocs.tib.eu/files/e01fb07/52962978Xl.pdf
    DOI: 10.2314/GBV:52962978X
    Language: German , English
    Note: Förderkennzeichen BMBF 03G0180A. - Engl. Berichtsbl. u.d.T.: Plate kinematics in the Central Pacific in the Late Oligocene - Early Miocene , Unterschiede zwischen der elektronischen Ressource und dem gedruckten Dokument können nicht ausgeschlossen werden , Auch als gedr. Ausg. vorhanden , Systemvoraussetzungen: Acrobat reader. , Anh. in engl.
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  • 5
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    Polyphase Magmatism During the Formation of the Northern East Greenland Continental Margin (2019)
    In:  EPIC3Tectonics, 38, pp. 2961-2982
    Details
    Publication Date: 2019-11-06
    Description: New marine geophysical data acquired across the partly ice‐covered northern East Greenland continental margin highlight a complex interaction between tectonic and magmatic events. Breakup‐related lava flows are imaged in reflection seismic data as seaward dipping reflectors, which are found to decrease in size both northward and southward from a central point at 75°N. We provide evidence that the magnetic anomaly pattern in the shelf area is related to volcanic phases and not to the presence of oceanic crust. The remnant magnetization of the individual lava flows is used to deduce a relative timing of the emplacement of the volcanic wedges. We find that the seaward dipping reflectors have been emplaced over a period of 2–4 Ma progressively from north to south and from landward to seaward. The new data indicate a major post‐middle Eocene magmatic phase around the landward termination of the West Jan Mayen Fracture Zone. This post‐40‐Ma volcanism likely was associated with the progressive separation of the Jan Mayen microcontinent from East Greenland. The breakup of the Greenland Sea started at several isolated seafloor spreading cells whose location was controlled by rift structures and led to the present‐day segmentation of the margin. The original rift basins were subsequently connected by steady‐state seafloor spreading that propagated southward, from the Greenland Fracture Zone to the Jan Mayen Fracture Zone.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 6
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publication Date: 2023-05-20
    Keywords: Conductivity, average; Depth, bottom/max; Heat flow; LATITUDE; LONGITUDE; Method comment; Sample, optional label/labor no; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 1202 data points
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    DATA PANGAEA
  • 7
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    Gridded bathymetry from multibeam echosounder EM122 data of the cruise MSM35 (2016)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Description: The aim of Maria S. MERIAN voyage MSM35 was to conduct marine controlled source electromagnetic (CSEM) measurements in the Danube Delta, Black Sea, to identify suitable gas hydrate deposits for a future MEBO drilling test site for methane production and CO2 sequestration in hydrate form. Marine CSEM is a geophysical exploration method to derive the electrical properties, i.e. resistivity of the seafloor. Gas hydrates and free gas are electrically insulating and replace conductive pore fluid.
    Keywords: Center for Marine Environmental Sciences; CT; File content; File format; File name; File size; Maria S. Merian; MARUM; MSM35; MSM35-track; Underway cruise track measurements; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 5 data points
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    DATA PANGAEA
  • 8
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    MSM35 raw data of EM122 multibeam echosounder (bathymetry, beam time series & water column) (2018)
    PANGAEA
    In:  MARUM - Center for Marine Environmental Sciences, University Bremen
    Details
    Publication Date: 2024-02-02
    Description: Multibeam echosounder (MBES) data recorded during RV MARIA S. MERIAN cruise MSM35between 20.01.2014 and 05.02.2014 in the Black Sea. The aim of the cruise was to conduct marine controlled source electromagnetic (CSEM) measurements in the Danube Delta, Black Sea, to identify suitable gas hydrate deposits for a future MEBO drilling test site for methane production and CO2 sequestration in hydrate form. CI Citation: Paul Wintersteller (seafloor-imaging@marum.de) as responsible party for bathymetry raw data ingest and approval. Description of the data source: During the RV MARIA S. MERIAN cruise MSM35 Kongsberg EM122 multibeam echosounder with a nominal sounding frequency of 11.5 to 12.5 kHz was utilized. 288 beams (and up to 864 soundings in equidistant and dual swath mode) are formed for each ping with a 2°(Tx)/2°(Rx) footprint while the seafloor is detected using amplitude and phase information for each beam sounding. For further information consult https://www.km.kongsberg.com/. Due to bad weather conditions during MSM35 the quality of the bathymetric data set is between fair and poor; the ship rolled more than the system set maximum roll compensation angle. Information gathered from the CR, responsible person during this cruise / PI: Udo Barckhausen (udo.barckhausen@bgr.de). Chief Scientist: Katrin Schwalenberg (katrin.schwalenberg@bgr.de) CR: https://www.tib.eu/de/suchen/id/awi%3Adoi~10.2312%252Fcr_msm35/ CSR: https://www2.bsh.de/aktdat/dod/fahrtergebnis/2014/20140004.htm
    Keywords: BGR; Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover; CT; File format; File name; File size; Maria S. Merian; MSM35; MSM35-track; Underway cruise track measurements; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 208 data points
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    DATA PANGAEA
  • 9
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    Gravity data of 2D profile crossing the Mangatolu Triple Junction and the Fonualei Rift Spreading Centre in the northern Lau Basin, measured along profile P02 during SONNE cruise SO267 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: The gravimetric data was acquired with a sea gravimeter KSS32-M system, which was installed on RV Sonne near its centre of gravity during the SO267 cruise. The instrumental drift of the data was approximated by repeated gravity observations in the harbour of Suva both at the beginning and at the end of the expedition. In order to tie the measurements to the International Gravity Standardization Net IGSN71, gravimetric measurements with a LaCoste&Romberg gravity metre, model G, no. 480 (LCR G480) were executed both at the pier next to RV Sonne and at the next absolute gravity reference station at the Mineral Resources Department in Suva, Fiji. Additional processing of the data comprised the correction of the Eötvös effect using navigation data and the subtraction of the normal gravity. Data was acquired along a E-W trending profile in the northern Lau Basin at ~ 16°S between the 13.01.2019 and the 14.01.2019.
    Keywords: BGR-18-202; DATE/TIME; Depth, bathymetric; Distance; Fonualei; Free-air gravity anomaly; gravity; Gravity; LATITUDE; Lau Basin; LONGITUDE; MCSEIS; Multichannel seismics; SO267; SO267_81-1_P02; Sonne_2; Station label
    Type: Dataset
    Format: text/tab-separated-values, 475320 data points
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    DATA PANGAEA
  • 10
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    Master tracks in different resolutions of SONNE cruise SO300/1, Port Louis - Port Louis, 2023-09-05 - 2023-09-28 (2024)
    PANGAEA
    In:  Federal Institute for Geosciences and Natural Resources
    Details
    Publication Date: 2024-04-20
    Description: Raw data acquired by position sensors on board RV SONNE during expedition SO300/1 were processed to receive a validated master track which can be used as reference of further expedition data. During SO300/1 the motion reference unit Kongsberg SeaTex AS MRU-5 combined with Kongsberg SeaTex AS Seapath 320 and two GPS receivers SAAB MGL-4 were used as navigation sensors. Data were downloaded from DAVIS SHIP data base (https://dship.bsh.de) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track.
    Keywords: Calculated; Course; CT; DAM_Underway; DAM Underway Research Data; DATE/TIME; INDEX 23; LATITUDE; LONGITUDE; SO300/1; SO300/1-track; Sonne_2; Speed; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 6640 data points
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    DATA PANGAEA
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