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  • 1
    facet.materialart.
    Unknown
    Whole rock, glass inclusion and mineral major element data from the Pukeonake vent in the Taupo Volcanic Zone (2017)
    PANGAEA
    Details
    Publication Date: 2023-12-06
    Description: Andesites with Mg# 〉45 erupted at subduction zones form either by partial melting of metasomatized mantle or by mixing and assimilation processes during melt ascent. Primitive whole rock basaltic andesites from the Pukeonake vent in the Tongariro Volcanic Centre in New Zealand's Taupo Volcanic Zone contain olivine, clino- and orthopyroxene, and plagioclase xeno- and antecrysts in a partly glassy matrix. Glass pools interstitial between minerals and glass inclusions in clinopyroxene, orthopyroxene and plagioclase as well as matrix glasses are rhyolitic to dacitic indicating that the melts were more evolved than their andesitic bulk host rock analyses indicate. Olivine xenocrysts have high Fo contents up to 94%, d18O(SMOW) of +5.1 per mil, and contain Cr-spinel inclusions, all of which imply an origin in equilibrium with primitive mantle-derived melts. Mineral zoning in olivine, clinopyroxene and plagioclase suggest that fractional crystallization occurred. Elevated O isotope ratios in clinopyroxene and glass indicate that the lavas assimilated sedimentary rocks during stagnation in the crust. Thus, the Pukeonake andesites formed by a combination of fractional crystallization, assimilation of crustal rocks, and mixing of dacite liquid with mantle-derived minerals in a complex crustal magma system. The disequilibrium textures and O isotope compositions of the minerals indicate mixing processes on timescales of less than a year prior to eruption. Similar processes may occur in other subduction zones and require careful study of the lavas to determine the origin of andesite magmas in arc volcanoes situated on continental crust.
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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  • 2
    facet.materialart.
    Unknown
    (Table 1) Pukeonake whole rock, glass and glass inclusion compositions (2017)
    PANGAEA
    Details
    Publication Date: 2023-12-06
    Keywords: Aluminium oxide; Antimony; Area/locality; Barium; Caesium; Calcium oxide; Cerium; Chlorine; Chromium; Cobalt; Copper; Dysprosium; Elements, total; Erbium; Europium; Event label; Gadolinium; Gallium; Hafnium; Holmium; International Generic Sample Number; Iron oxide, Fe2O3; Iron oxide, FeO; Lanthanum; LATITUDE; Lead; Lithium; LONGITUDE; Lutetium; Magnesium oxide; Manganese oxide; Mineral name; Molybdenum; MULT; Multiple investigations; Neodymium; Nickel; Niobium; Phosphorus pentoxide; Potassium oxide; Praseodymium; Pukeonake; Ruapehu; Rubidium; Samarium; Sample code/label; Sample type; Scandium; Silicon dioxide; Sodium oxide; Strontium; Sulfur trioxide; Tantalum; Taupo Volcanic Zone, North Island of New Zealand; Terbium; Thorium; Thulium; Tin; Titanium dioxide; Tungsten; Uranium; Vanadium; Ytterbium; Yttrium; Zinc; Zirconium; δ18O; δ18O, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 1160 data points
    Location Call Number Limitation Availability
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  • 3
    facet.materialart.
    Unknown
    (Table 2) Pukeonake plagioclase, clinopyroxene, orthopyroxene, olivine and oxide mineral compositions (2017)
    PANGAEA
    Details
    Publication Date: 2023-12-06
    Keywords: Albite; Aluminium; Aluminium oxide; Anorthite; Calcium; Calcium oxide; Calculated; Calculated based on oxygen number; Cations; Chromium; Chromium(III) oxide; Electron microprobe (EMP); Elements, total; Enstatite; Event label; Ferrosilite; International Generic Sample Number; Iron 2+; Iron 3+; Iron oxide, FeO; Laser spectrofluorometry; LATITUDE; LONGITUDE; Magnesium; Magnesium number; Magnesium oxide; Manganese 2+; Manganese oxide; Mineral name; MULT; Multiple investigations; Nickel; Nickel oxide; Orthoclase; Position; Potassium; Potassium oxide; Pukeonake; Ruapehu; Sample code/label; Sample type; Silicon; Silicon dioxide; Sodium; Sodium oxide; Taupo Volcanic Zone, North Island of New Zealand; Titanium; Titanium dioxide; Wollastonite; δ18O; δ18O, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 6885 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Shallow seismicity and the classification of structures in the Lau back-arc basin (2020)
    PANGAEA
    Details
    Publication Date: 2023-12-06
    Description: We compared Centroid Moment Tensors (CMTs), calculated for large (Mw 〉5), shallow (〈30 km) seismic events to the orientations of seafloor lineaments (n = 4000) mapped throughout the Lau Basin, in the SW Pacific. Ship-based multibeam was combined with vertical gravity gradient data to provide comprehensive coverage to create the lineament map. By comparing the possible focal planes of the CMTs to the orientations of the lineaments, the most likely fault plane solutions were selected, thus classifying the faults and establishing the nature of the highly variable stress regimes in the basin. We resolved the strike, dip and dip direction of 308 faults, and classified 258 additional structures by fault type. The majority of the table was data downloaded from the Global Centroid Moment Tensor (GCMT) database (www.globalcmt.org: accessed October 2018). For more details about the column headers consult the GCMT database website. New data from this study include the latitude and longitude error estimates (in meters), the classified faults (column: 'fault_type'), and the stress domain (column: 'stress_domain'), allocated to each of the classified faults.
    Keywords: Area/locality; B010186B; B010285E; B010484C; B010783C; B010783E; B010903A; B011101E; B011398E; B011498H; B011683A; B011694B; B011694F; B011700C; B011700E; B011777B; B011800B; B012099A; B012300F; B012300I; B012385B; B012598A; B012699D; B012999A; B020201E; B020487B; B020494A; B020796B; B020901A; B021298F; B021581B; B021587A; B021696B; B022093C; B022102F; B022387C; B022491B; B022503C; B022689B; B022787B; B030395E; B030601B; B030880A; B030894B; B031198D; B031293F; B031387A; B031387B; B031387E; B031393C; B031481A; B031487C; B031692A; B031992C; B031998A; B032003A; B032103D; B032377B; B032377C; B032377D; B032596A; B032682D; B032780A; B032780B; B032786A; B032882D; B032893B; B032982B; B032986B; B033002A; B033091A; B040691B; B040980A; B040991B; B041083C; B041201E; B041586A; B041780A; B041991C; B042088C; B042186A; B042294B; B042585D; B042700A; B042800B; B042879B; B042890B; B042979A; B050186A; B050198A; B050280D; B050392A; B050601C; B051486G; B051802C; B051981B; B052102D; B053179B; B060583A; B060598C; B060790C; B061186B; B061382A; B061479B; B061481A; B061492F; B061699D; B061797B; B061895B; B061895C; B062392E; B062502B; B062601M; B070188A; B070188B; B070689A; B070900A; B071684B; B071789A; B071997B; B072202A; B072602B; B072603D; B073101E; B080178A; B080497D; B080586A; B080586B; B080799A; B081087A; B081095B; B081286A; B081295A; B081299A; B081388C; B081694H; B081696C; B081696F; B082185A; B082290B; B082486A; B082486C; B082500A; B082577A; B082603B; B082686B; B082788B; B082790A; B082903B; B082995B; B083195C; B090684A; B090695A; B090882C; B091081A; B091377A; B091395C; B091799C; B091899D; B092097G; B092390A; B092492E; B092497C; B092688E; B092695A; B092995A; B093082A; B100179B; B100285B; B100295B; B100482B; B100684A; B100696A; B101303E; B101384A; B101501A; B101802D; B101802E; B101982A; B102287E; B102290A; B102677A; B102677B; B102885C; B103093C; B103100E; B110187C; B110499B; B110598F; B110796A; B111082A; B111382A; B111494B; B111596B; B111696C; B111696F; B111784G; B111796C; B111796E; B111797A; B111997B; B112090C; B112479A; B113087B; B113088B; B120386A; B120491A; B120696E; B120796A; B120888A; B120888B; B121286A; B121286C; B121386A; B121985A; B122190A; B122285A; B122285B; B122383A; B122387A; B122791B; B122998A; back-arc basins; Body wave magnitude; Body waves, components; Body waves, shortest period; Body waves, stations; C010987B; C011298J; C011498E; C012204A; C020399A; C020991A; C021393D; C022304C; C022304E; C022490A; C030693G; C030799E; C031293D; C031387F; C032004G; C032504E; C041704C; C041793C; C051504D; C051583A; C061404A; C070278A; C080497C; C080897C; C082997B; C090382E; C091400B; C091783C; C092304C; C100480A; C101104F; C101302A; C101804A; C103100F; C110892B; C111004D; C112304C; C120301A; C121804G; C200502181525A; C200503132233A; C200504261133A; C200504261856A; C200505051011A; C200505111540A; C200507310419A; C200508071135A; C200508071354A; C200508071441A; C200508221648A; C200509041213A; C200510191410A; C200510291633A; C200512071934A; C200512130316A; C200512130732A; C200512161433A; C200512201148A; C200601290826A; C200602061134A; C200602260418A; C200603020747A; C200603051712A; C200603140529A; C200603171946A; C200603191254A; C200604031604A; C200604032027A; C200604251512A; C200604300703A; C200605211757A; C200606031326B; C200606131540A; C200606151715A; C200606151810A; C200606232150A; C200606270836A; C200606281322A; C200607020257A; C200607031949A; C200607041259A; C200608111807A; C200608111841A; C200608112020A; C200611061053A; C200611061124A; C200611210112A; C200611241711A; C200701160153A; C200702031647A; C200702050956A; C200702051016A; C200702051019A; C200703270803B; C200704050246A; C200704050325A; C200704130150A; C200705030630A; C200706140529A; C200706192036A; C200706231914A; C200706231920A; C200706231935A; C200706232102A; C200706232152A; C200706241015A; C200706260801A; C200707020054A; C200707090650A; C200707170939A; C200707180007A; C200707182351A; C200707191933A; C200707270351A; C200708222224A; C200709101004A; C200709140546A; C200709160010A; C200709180610A; C200709302011A; C200710050352A; C200710050417A; C200710300458A; C200711231222A; C200711231237A; C200712150246A; C200801201630A; C200801220009A; C200801220628A; C200801220755A; C200801221049A; C200801231220A; C200801240250A; C200801271528A; C200801302347A; C200801310152A; C200802011026A; C200802112320A; C200802141905A; C200803161956A; C200804151724A; C200804160035A; C200804251844A; C200806200424A; C200807221851A; C200807231255A; C200807231324A; C200807231354A; C200808141242A; C200808141510A; C200808240100A; C200809010531A; C200809010706A; C200809011032A; C200810030834A; C200810092308A; C200810232336A; C200810240058A; C200811201758A; C200901300347A; C200902080724A; C200902110931A; C200903070941A; C200903241813A; C200904142237A; C200904142329A; C200905110526A; C200905260049A; C200907020806A; C200907101604A; C200907211507A; C200908070242A; C200908070334A; C200908071734A; C200909210606A; C200910011739A; C200910011821A; C200910011840A; C200910031402A; C200910031410A; C200910051852A; C200910071310A; C200910141800A; C200910271201A; C200910281955A; C200911050600A; C200911050604A; C200911050611A; C200911291033A; C200912262123A; C200912291202A; C201001131621A; C201001131649A; C201001131651A; C201001171046A; C201002071312A; C201002071359A; C201002150529A; C201003280207A; C201003280251A; C201004042028A; C201007041338A; C201007041613A; C201007171620A; C201008300444A; C201009071249A; C201009071613A; C201009291225A; C201012011601A; C201012182224A; C201012201743A; C201012210736A; C201101211711A; C201101241331A; C201102031113A; C201102280224A; C201103262249A; C201103280847A; C201103310011A; C201103310259A; C201103310744A; C201103311631A; C201103311709A; C201104240601A; C201105021321A; C201105021922A; C201105171035A; C201105180810A; C201105240853A; C201105241630A; C201105300006A; C201106051635A; C201106051656A; C201106192126A; C201106280707A; C201107051902A; C201107061011A; C201107061344A; C201107061446A; C201107101847A; C201107102029A; C201107110054A; C201108030320A; C201108201027A; C201109222307A; C201109230901A; C201110280447A; C201110280913A; C201111130624A; C201111190541A; C201111190706A; C201112140048A; C201201041345A; C201201041804A; C201201041854A; C201201081951A; C201201082004A; C201201090006A; C201202220426A; C201202220804A; C201202221003A; C201202240202A; C201202260246A; C201202260508A; C201202260521A; C201202261117A; C201202261212A; C201202261349A; C201202261613A; C201202261628A; C201202261919A; C201202261937A; C201202270135A; C201202270301A; C201202270711A; C201202271434A; C201202271454A; C201203122148A; C201203192346A; C201203300618A; C201203312252A; C201205041758A; C201205051118A; C201205132246A; C201206041418A; C201206070023A; C201206170638A; C201206190036A; C201207060040A; C201207110357A; C201207230328A; C201208030508A; C201208030722A; C201208031945A; C201208100642A; C201208192054A; C201208200048A; C201208200215A; C201209271131A; C201209271139A; C201210121510A; C201210132236A; C201210220032A; C201210301059A; C201211032259A; C201211132323A; C201211220619A; C201211281016A; C201212120144A; C201212141652A; C201212271531A; C201301020819A; C201301031649A; C201301291329A; C201302152120A; C201302250259A; C201302250356A; C201304120048A; C201304262010A; C201305060733A; C201305310334A; C201306181313A; C201306301513A; C201307090124A; C201307290812A; C201309081000A; C201311141415A; C201312111809A; C201312151451A; C201401210129A; C201401220341A; C201401231209A; C201401261039A; C201401300446A; C201402230216A; C201402231654A; C201402231700A; C201402240119A; C201403070557A; C201403161115A; C201403281437A; C201403281454A; C201404250841A; C201405020746A; C201405131005A; C201405180058A; C201405180246A; C201405180638A; C201406062306A; C201406081108A; C201406091119A; C201406291552A; C201406291715A; C201406291824A; C201407041130A; C201407101732A; C201407212144A; C201408141846A; C201408271631A; C201409280623A; C201410051716A; C201410192047A; C201410201315A; C201410240452A; C201410280044A; C201410280315A; C201411051813A; C201411240417A;
    Type: Dataset
    Format: text/tab-separated-values, 42372 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO299 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-03
    Description: Current velocities of the upper water column along the cruise track of R/V Sonne cruise SO299 were collected by a vessel-mounted 75 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 8.00 m, a blanking distance of 8.00 m, and a total of 100 bins, covering the depth range between 22.0 m and 814.0 m. Heading, pitch and roll data from the ship's motion reference unit and the navigation data from the Global Positioning systems were used by the data acquisition software VmDAS internally to convert ADCP velocities into earth coordinates. Single-ping data were screened for bottom signals and, where appropriate, a bottom mask was manually processed. The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). Accuracy of the ADCP velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data post-processing included water track calibration of the misalignment angle (-0.1438° +/- 0.4600°) and scale factor (1.0005 +/- 0.0086) of the Ocean Surveyor signal. The velocity data were averaged in time using an average interval of 300 s. Velocity quality flagging is based on different threshold criteria: Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'. Depth cells with velocities above 1.5 m/s are flagged as 'bad data'. Depth cells with a root-mean-square deviation between the measured ensemble-average velocity and a cell-wise running-mean velocity above 0.5 m/s are flagged as 'probably bad data'.
    Keywords: Current velocity, east-west; Current velocity, north-south; DAM_Underway; DAM Underway Research Data; DATE/TIME; DEPTH, water; DynaMet; Echo intensity, relative; LATITUDE; LONGITUDE; Pings, averaged to a double ensemble value; Quality flag, current velocity; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); SO299; SO299/1_0_Underway-4; Sonne_2; Vessel mounted Acoustic Doppler Current Profiler [75 kHz]; VMADCP-75
    Type: Dataset
    Format: text/tab-separated-values, 5107345 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Shipboard ADCP current measurements (38 kHz) during RV SONNE cruise SO299 (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-03
    Description: Current velocities of the upper water column along the cruise track of R/V Sonne cruise SO299 were collected by a vessel-mounted 38 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 32.00 m, a blanking distance of 16.00 m, and a total of 50 bins, covering the depth range between 54.0 m and 1622.0 m. Heading, pitch and roll data from the ship's motion reference unit and the navigation data from the Global Positioning systems were used by the data acquisition software VmDAS internally to convert ADCP velocities into earth coordinates. Single-ping data were screened for bottom signals and, where appropriate, a bottom mask was manually processed. The ship's velocity was calculated from position fixes obtained by the Global Positioning System (GPS). Accuracy of the ADCP velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data post-processing included water track calibration of the misalignment angle (-0.2374° +/- 0.5601°) and scale factor (1.0045 +/- 0.0097) of the Ocean Surveyor signal. The velocity data were averaged in time using an average interval of 60 s. Velocity quality flagging is based on different threshold criteria: Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'. Depth cells with velocities above 1.5 m/s are flagged as 'bad data'. Depth cells with a root-mean-square deviation between the measured ensemble-average velocity and a cell-wise running-mean velocity above 0.3 m/s are flagged as 'probably bad data'.
    Keywords: Current velocity, east-west; Current velocity, north-south; DAM_Underway; DAM Underway Research Data; DATE/TIME; DEPTH, water; DynaMet; Echo intensity, relative; LATITUDE; LONGITUDE; Pings, averaged to a double ensemble value; Quality flag, current velocity; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); SO299; SO299/1_0_Underway-5; Sonne_2; Vessel mounted Acoustic Doppler Current Profiler [38 kHz]; VMADCP-38
    Type: Dataset
    Format: text/tab-separated-values, 11025015 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Unknown
    Effects of the hydrous domain in the mantle wedge on magma formation and mixing at the Northeast Lau Spreading Centre, SW Pacific (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-17
    Description: Major and trace element concentrations of young volcanic rocks from the Northeast Lau Basin in the SW Pacific Ocean, as well as Sr-Nd-Hf-Pb isotope compositions. Analyses were mainly carried out at the GeoZentrum Nordbayern, University of Erlangen, Germany, where major elements were determined by electrons microprobe on volcanic glasses and by XRF on whole rocks. Trace elements were analyzed by LA ICPMS on glass at the Macquarie University, Sydney, Australia, and by dissolution ICPMS at the GeoZentrum Nordbayern. Water concentrations on glasses were analyzed by SIMS at the Australian National University, Canberra, Australia. Isotope ratios were determined by TIMS and MC ICPMS at the GeoZentrum Nordbayern.
    Keywords: #442; #443; Aluminium oxide; Analysis; Antimony; Arsenic; back-arc spreading; Barium; Bismuth; Cadmium; Caesium; Calcium oxide; Cerium; Chlorine; Chromium; Cobalt; Copper; DATE/TIME; DEPTH, water; Dysprosium; Electron microprobe (EMP); Erbium; Europium; Event label; Gadolinium; Gallium; Gold; Hafnium; Hafnium-176/Hafnium-177; Holmium; Inductively Coupled Plasma Mass Spectrometer (ICPMS); Iron oxide, Fe2O3; Iron oxide, FeO; Lanthanum; LATITUDE; Lau Basin; Lead; Lead-206/Lead-204 ratio; Lead-207/Lead-204 ratio; Lead-208/Lead-204 ratio; Lithium; lithosphere rifting; Location; LONGITUDE; Loss on ignition; Lutetium; Magnesium oxide; Manganese; Manganese oxide; Molybdenum; Neodymium; Neodymium-143/Neodymium-144 ratio; Nickel; Niobium; Palladium; Phosphorus pentoxide; Platinum; Potassium oxide; Praseodymium; Remote operated vehicle; Rhodium; Rock type; ROV; Rubidium; Samarium; Sample comment; Sample ID; Sample method; Scandium; Selenium; Silicon dioxide; Silver; slab component; SO263; SO263_074; SO263_075; SO263_076; SO263_077; SO263_078; SO263_079; SO263_080; SO263_098; SO263_099; SO263_100; SO263_101; SO263_102; SO263_104; SO263_105; SO263_106; SO263_107; SO263_108; SO263_109; SO263_111; SO263_112; SO263_113; SO263_116; SO263_117; SO263_118; SO263_119; SO263_120; SO263_122; SO263_124; SO263_125; SO263_126; SO263_129; SO263_130; Sodium oxide; Sonne_2; Strontium; Strontium-87/Strontium-86 ratio; Sulfite; Sum; Tantalum; Television-Grab; Tellurium; Terbium; Thallium; Thermal Ionization Mass Spectrometry (TIMS) and Inductively Coupled Plasma Mass Spectrometer (ICPMS); Thorium; Thulium; Tin; Titanium dioxide; Tofua island arc; Tonga Rift; Tungsten; TVG; Uranium; Vanadium; Volcanic wax corer; VSR; Water in rock; Water in rock, standard deviation; X-ray fluorescence (XRF); X-ray fluorescence (XRF)/Electron microprobe (EMP); Ytterbium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 3245 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Master track of SONNE cruise SO299/1 in 1 sec resolution (zipped, 190.7 MB) (2023)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2024-04-20
    Description: Raw data acquired by position sensors on board RV SONNE during expedition SO299/1 were processed to receive a validated master track which can be used as reference of further expedition data. During SO299/1 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: 1 sec resolution; CT; DAM_Underway; DAM Underway Research Data; DynaMet; SO299; SO299/1-track; Sonne_2; Underway cruise track measurements
    Type: Dataset
    Format: application/zip, 190.7 MBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Unknown
    Master tracks in different resolutions of SONNE cruise SO299/1, Townsville - Singapore, 2023-06-07 - 2023-07-29 (2023)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2024-04-20
    Description: Raw data acquired by position sensors on board RV SONNE during expedition SO299/1 were processed to receive a validated master track which can be used as reference of further expedition data. During SO299/1 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; DynaMet; LATITUDE; LONGITUDE; SO299; SO299/1-track; Sonne_2; Speed; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 14894 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Unknown
    Formation of the Troodos Ophiolite at a triple junction: Evidence from trace elements in volcanic glass (2014)
    Elsevier
    In:  Chemical Geology, 386 . pp. 66-79.
    Details
    Publication Date: 2017-07-14
    Description: Fresh volcanic glasses from the extrusive section of the Troodos Ophiolite in Akaki Canyon are tholeiitic and basaltic to dacitic in composition. Compared to normal MORB they have extremely low fractionation corrected Na8, Fe8 and Ti8 and are enriched in fluid-mobile trace elements, including U, Ba, Rb, Sr and Pb, relative to non-fluid mobile elements of similar incompatibility. Trace element compositions of Akaki lavas define an array extending between ‘back-arc lava’-like compositions, and the field defined by Troodos boninites from the upper part of the lava sequence. Troodos lavas were derived from a mantle source that underwent early melt depletion, and later enrichment by both fluids and small degree melts. These processes can explain the unusual negative correlation of Pb/Ce with Zr/Nb and Ba/Nb in Troodos extrusives. Although some Troodos lavas are similar in composition to lavas from back-arc spreading centres, the boninites from the upper parts of the lava pile do not appear to have exact compositional equivalents among lavas from fore-arcs, back-arcs or other tectonic settings where similar rocktypes have been recovered. We suggest that the geochemical evolution inferred for the mantle source of Troodos lavas, together with geological evidence is most consistent with an origin for the Troodos Ophiolite at a spreading centre close to a ridge–trench–trench, or ridge–trench–transform triple junction, where highly depleted, subduction-modified, fluid-enriched mantle wedge material was able to upwell and decompress to shallow depths in a ‘fore-arc’ location. In such a tectonic setting, arc volcanism is captured by the spreading centre, explaining the lack of evidence for subaerial arc magmatism in Troodos. Rapid lateral migration of the triple junction could account for the similar ages of other Tethyan supra-subduction zone ophiolites.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.chemgeo.2014.08.006
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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