name_de: Quadrupol ICP Massenspektrometer
name_en: Quadrupole ICP Massspectrometer
model: XSeries 2
url:
manufacturer: ThermoFisher
year: 0
location_de: Erlangen
location_en: Erlangen
usage_de: Auch für externe Nutzer
usage_en: For external users too
description_de:
Messung von Spurenelementen im ppb Bereich
description_en: <p>Non-volatile elements in geological samples at the pub-ppt level</p>
feature_de:
feature_en:
pictures: <QuerySet []>
cards: <QuerySet []>
funding_sources: <QuerySet []>
projects: <QuerySet [<Project: Magmatic evolution of an oceanic island arc – The New Hebrides case, , , , , , 2020-02-01, 2022-01-31, , 2022-01-31, Third party funded individual grant, True>, <Project: Magma formation and evolution in an oceanic island arc - back-arc system: a case study from the Tonga arc and Valu Fa Ridge, , , , , , 2018-02-01, 2021-01-31, , 2021-01-31, Third party funded individual grant, True>, <Project: Bildung, Transport und Entwicklung von Magmen in einem ozeanischen, ultralangsam spreizenden Rift, , , , , , 2017-07-01, 2020-06-30, , 2020-06-30, Third party funded individual grant, True>, <Project: Magmatic evolution of island arc and backarc crust and implications for hydrothermal venting in the NE Tonga arc (TONGARIFT), TONGARIFT, , TONGARIFT, <p>
Oceanic island arcs probably evolve through different tectonic stages that are marked by the formation and eruption of different magmatic rocks. Boninites have a peculiar geochemical composition reflecting partial melting of highly depleted mantle and are believed to be typical for the early stages of island arc evolution. The main objectives of the proposed project are sampling of shallow crustal profiles at the NE Tonga Ridge and Lau backarc basin where boninitic lavas appear to be very abundant in order to establish the stratigraphic situation of these boninites. Lavas from the N Tonga volcanic islands have unique compositions reflecting very strong depletion of the mantle wedge and re-enrichment by fluids from subducted seamount lavas, whereas some backarc lavas indicate influence of mantle plume material, possibly from Samoa. The Niuatahi volcano is surrounded by young lava flows and volcanic ridges that reach to the NE Lau spreading centre and the abundant on- and off-axis lavas allow studying the magma generation and mixing processes from the arc front to the backarc. We propose to study the composition of the NE Tonga volcanoes to better define the different sources and the implications for mantle and melting dynamics in a subduction zone. The recently active volcanoes in the NE Lau backarc and NE Tonga arc show highly variable hydrothermal venting and thus offer a natural laboratory for the study of the effects of magma degassing on hydrothermal fluid and precipitate composition. We suggest sampling of different vents related to different magmatic structures in order to test models of the effects of varying magmatic volatile input and water depth on the fluids.</p>, , 2018-02-01, 2020-03-31, , 2020-03-31, Third Party Funds Group - Sub project, True>, <Project: Tectonic origin of the Troodos Ophiolite from three-dimensional geochemical mapping of the lava pile, , , , <p>
Ophiolites are often used to infer the internal structure of the oceanic crust and the processes by which it is formed, but most ophiolites were not formed in typical mid-ocean ridge settings. Instead, they appear to have formed close to former subduction zones, but the exact tectonic setting in which they were formed is debated. If ophiolites represent fore-arc crust formed during subduction initiation events, then they provide insights into the initiation of subduction zones, an outstanding unresolved question in plate tectonics. If ophiolites were formed in back-arc or plate edge settings they may represent useful analogues for the internal structure of oceanic crust. If they were formed at a ridge-trench-trench or ridge-trench-transform triple junction then they could be used to infer mantle wedge structure and processes. These tectonic models predict different geochemical variations in ophiolite lavas with space and time. We will map out the 3D gechemical structure of the Troodos Ophiolite of Cyprus, one of the best preserved an exposed ophiolites. We will use major and trace element microanaysis of fresh volcanic glass in order to avoid the effects of alteration. Detailed high resolution sampling of sections through the Troodos volcanic section on both the northern and southern margins of the ophiolite will be used to determine the chemical evolution of magmatism and test hypotheses for the tectonic origin of this ophiolite.</p>, , 2016-11-01, 2019-10-31, , 2019-10-31, Third party funded individual grant, True>, <Project: Vulkanische und tektonische Prozesse im westlichen Teil des Eger Grabens, , , , , , 2017-05-01, 2018-04-30, , 2018-04-30, Third party funded individual grant, True>, <Project: The role of mixing processes in andesite genesis - deep sediment recycling versus shallow crustal contamination, , , , <div>
Andesites are the typical volcanic rocks at active continental margins and the average continental crust has an andesitic composition. Many andesitic magmas form by complex mixing processes involving sedimentary material that is either subducted into the mantle wedge or may be assimilated in the crust by the ascending magma. The Aegean arc represents the subduction zone with one of the highest sediment recycling rates on Earth and the magmas show whole-rock geochemical evidence of a significant sediment contribution. In order to define the depths of the magma sources and the mixing processes we suggest to study the major and trace element as well as Sr-Nd-Hf-Pb-O isotope composition of minerals like olivine, amphibole, clinopyroxene, and plagioclase and potential glass inclusions in lavas from the Methana/Aegina volcanoes in the Aegean arc. The mineral phases allow insights into the mixing processes of different end-members at different depths that can be determined by thermo-barometry. The Methana/Aegina lavas are well-suited for such a case study because they are geochemically well-described and variable with extreme compositions of the mixing end-members and they contain abundant mineral phases.</div>, , 2015-01-01, , , 2018-01-01, Third party funded individual grant, True>, <Project: Durchführung von Spurenelementmessungen und Nd-Pb Isotopenmessungen an Manganknollen und assoziierten Sedimenten, , , , , , 2017-05-01, 2017-12-31, , 2017-12-31, Third party funded individual grant, True>, <Project: Volcanism and hydrothermal venting in the Coriolis Basins, New Hebrides Island Arc (COVOLVE), COVOLVE, , , <p>
Junges Rifting (< 3 Ma) im südlichen Neue Hebriden Inselbogen erzeugte drei vulkanische und hydrothermal aktive Becken im Coriolis Becken, in denen z.T. alkaline Magmen mit Anreicherungen an Nb und Ta auftreten. Weiterhin zeigt der Vanuatu Inselbogen eine starke Dynamik mit einem Umspringen der vulkanischen Aktivität weiter nach Osten. Durch das Rifting wurden tiefe Bereiche des Inselbogens freigelegt, die offenbar bis 7 Ma alt sind. Eine detaillierte stratigraphische Beprobung dieser Riftflanken und der jungen Vulkane im südlichen Inselbogen und im Backarc ermöglichen daher einmalige Möglichkeiten zur Entwicklung der Magmen, ihres Aufstiegs und ihrer Quellen in den letzten 7 Ma. Drei Vorkommen von hydrothermalen Quellen bzw. Präzipitaten wurden in den Coriolis Troughs bisher beschrieben aber nicht detailliert untersucht. Mit einem ROV sollen die zeitliche und chemische Variabilität zwischen Magmengenese, Vulkanismus und Hydrothermalismus im Gebiet der Coriolis Becken untersucht werden. Von Bedeutung sind Fragen der lithologischen Kontrolle durch volatilreiche, alkaline Magmen und Einflüsse vulkanischer Entwicklung auf metallogenetische Prozesse sowie der Fluiddynamik und –entwicklung. Die Auswirkung unterschiedlicher Wassertiefen auf die Entgasungsprozesse und Zusammensetzung hydrothermaler Fluide steht dabei im Vordergrund. Ein weiterer Schwerpunkt liegt in der Untersuchung der kleinräumigen Variabilität magmatischer Differenziation im Inselbogen und deren Rückkopplung auf Metallfraktionierung und hydrothermale Aktivität. Von biologischer Seite steht das Verständnis der Kontrolle der Habitate sowie der Faunenverteilung und -zusammensetzung an hydrothermalen Austritten im Vordergrund. </p>, , 2013-06-01, 2015-05-31, , 2015-05-31, Third party funded individual grant, True>, <Project: Origin and length scale of compositional anomalies in the convecting Earth: constraints from the Azores, , , , <p>
Lavas from the Azores islands show some of the most extreme variation in trace element and isotope compositions known from oceanic intraplate volcanoes. This extreme variation has partly been explained by the presence of recycled crustal rocks in the mantle sources. Stable isotopes provide the prospect to increase our understanding of the generation of such mantle sources. While the 18O/16O of upper mantle olivines shows a small variability (~δ18O of 5.0-5.2 ‰) the incorporation of sedimentary and continental material into the mantle will significantly increase the δ18O. Contrastingly, the high temperature alteration of the oceanic crust will result in lower δ18O. The Azores archipelago displays an ideal site to study the O isotope variation of highly variable mantle sources on a small scale in order to determine their origin. We propose a systematic study of olivine and clinopyroxene phenocrysts from primitive lavas and plagioclase phenocrysts from evolved lavas as well as glass analyses from all lavas of the Azores volcanoes both east and west of the Mid-Atlantic Ridge in order to better understand the variability of mantle sources and their origin. Chlorine and F concentrations in glasses from different islands will help to define crustal assimilation of the Azores magmas and can also be used to define recycled crustal material in pristine mafic rocks. This study will complement the large geochemical data set on the Azores magmas and provide important new insight into the origin of mantle sources.</p>, , 2011-09-01, 2013-03-30, , 2013-03-30, Third party funded individual grant, True>]>
publications: <QuerySet [<Publication: Superplume mantle tracked isotopically the length of Africa from the Indian Ocean to the Red Sea>, <Publication: Variation of melting processes and magma sources of the early Deccan flood basalts, Malwa Plateau, India>, <Publication: Progressive Changes in Magma Transport at the Active Serreta Ridge, Azores>, <Publication: Upper crustal fluids in a large fault system: microstructural, trace element and oxygen isotope study on multi-phase vein quartz at the Bavarian Pfahl, SE Germany>, <Publication: Correlated Changes Between Volcanic Structures and Magma Composition in the Faial Volcanic System, Azores>, <Publication: Mantle sources and magma evolution of the Rooiberg lavas, Bushveld Large Igneous Province, South Africa>, <Publication: Evidence for melting of subducting carbonate-rich sediments in the western Aegean Arc>, <Publication: Primitive andesites from the Taupo Volcanic Zone formed by magma mixing>, <Publication: Trace element and isotope geochemistry of the Northern and Central Tongan Islands with an emphasis on the genesis of High Nb/Ta signatures at the Northern Volcanoes of Tafahi and Niuatoputapu>, <Publication: Magmatic evolution and source variations at the Nifonea Ridge (New Hebrides Island Arc)>, <Publication: Spatial variability of source composition and petrogenesis in rift and rift flank alkaline lavas from the Eger Rift, Central Europe>, <Publication: Constraints on the magmatic evolution of the oceanic crust from plagiogranite intrusions in the Oman ophiolite>, <Publication: Formation of andesite melts and Ca-rich plagioclase in the submarine Monowai volcanic system, Kermadec arc>, <Publication: Melts of sediments in the mantle wedge of the Oman ophiolite>, <Publication: The magmatic evolution of young island arc crust observed in gabbroic to tonalitic xenoliths from Raoul Island, Kermadec Island Arc>, <Publication: Formation of the Troodos Ophiolite at a triple junction: Evidence from trace elements in volcanic glass>, <Publication: Constraints on the formation of geochemically variable plagiogranite intrusions in the Troodos Ophiolite, Cyprus>]>
fobes: <QuerySet []>
orgas: <QuerySet []>
