name_de: Multikollektor ICP-Massenspektrometer
name_en: Multikollektor ICP-Massenspektrometer
model: Neptune Plus
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 Isotopenverhältnissen von Blei, Hafnium, Uran, Thorium, Neodym und anderen Elementen
description_en:
feature_de:
feature_en:
pictures: <QuerySet []>
cards: <QuerySet []>
funding_sources: <QuerySet [<FundingSource: FundingSource: cris_id: 139453943, name: Deutsche Forschungsgemeinschaft (DFG), abbreviation: DFG>]>
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: 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: Volcanic construction, seawater circulation, rock bioalteration, and sponge communities at Vesteris Seamount, Greenland Sea (VESTERIS - MSM86), VESTERIS - MSM86, , Vulkanischer Aufbau, Meerwasserzirkulation, Gesteins Bioalteration und Schwammvergesellschaftungen am Vesteris Seamount, Grönlandbecken, <div><div><div><p>We request ship time with RV Maria S. Merian to conduct detailed ROV-based geological and biological investigations of the Vesteris Seamount in the Central Greenland Sea. High-resolution bathymetry mapping with modern multibeam echosounders and comprehenisve sampling of the volcanic substrate are one focus of the cruise. These samples will be investigated geochemically and geochronologically to unravel the petrological/volcanological evolution of the seamount. Hydrographic surveys will be conducted to look for hydrothermal venting. Another emphasis is on geobiological investigations, including an assessment of the colonization of the volcanic substrate by fungi, fungal diversity and activity as well as relations to seawater-rock interactions during weathering. We will also do a detailed appraisal of the sponge communities that densely colonize the seamount and will conduct comprehensive molecular-ecological studies to understand the functioning of the holobiont. Furthermore, we propose to map and sample a prominent seamount south of our main work area as well as several volcanic centers northeast of it. These materials and data will allow us to shed new light on the magmatic- tectonic evolution of the northernmost Atlantic.</p></div></div></div>, , 2019-08-01, 2019-10-01, , 2019-10-01, Third Party Funds Group - Sub project, True>, <Project: The Rio Grande Rise and Jean Charcot Seamount Chain - microcontinents or the trail of the Tristan-Gough hotspot? (RIOGRANDE - MSM82), RIOGRANDE - MSM82, , , <p>The Rio Grande Rise (RGR) is a massive plateau and seamount province in the SW Atlantic that has been assumed to represent a large igneous province formed by voluminous magmatic activity of the Tristan-Gough mantle plume on the South American plate. But new evidence showing that the RGR might be a sliver of continental crust that was captured, and possibly rifted, at the time of continental breakup, is throwing considerable doubt on a hotspot origin. We propose a combined seismic, geochemical, geo- and thermochronological study of the nature of the deep and shallow RGR basement to test our hypothesis that the RGR is a microcontinent that has been modified by a complex tectonic and magmatic history, including 1000 km long rifts, associated with buoyant plume upwelling and formation of the Jean Charcot Seamount Chain. These data will determine the relative amounts of continental and oceanic crust, age and origin of the volcanic rocks, and chemical changes with time. The results will have important implications for the understanding of continental rifting and opening of ocean basins and the role of microcontinents in the formation of hotspot trails.<br /></p>, , 2019-03-01, 2019-04-30, , 2019-04-30, 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: Formation and evolution of magmas due to subduction of sediments: a case study of the submarine Paphsanias Volcano, Aegean Arc (PAPHSANIAS), PAPHSANIAS, , , <p>
Andesite magmas at active continental margins may form due to assimilation-fractional crystallization processes from basaltic mantle melts or due to direct partial melting of unusual mantle rocks resulting, for example, from mixing of sediment melts with peridotite. Magmas of the Aegean Arc indicate a reaction of the melts with the crust during the ascent as well as a strong input of sediment into the melting zone of the mantle wedge. These different mixing processes are difficult to define in most rocks and require detailed studies of melt (glass) and mineral compositions. Thus, submarine lavas are best suited for a study of andesite formation because melts are quenched and their composition including volatile contents can be determined. The volcanoes of the western Aegean mainly erupted effusive lavas in domes and flows rather than showing explosive activity. We propose a cruise to the westernmost submarine volcano Paphsanias of the Aegean Arc that has not been studied petrologically and geochemically. We suggest studying and sampling this volcano using an ROV that will give us stratigraphic control of the samples. The ROV dives will allow determining the relative abundance of lavas and volcaniclastic rocks and yield insights into the apparently different magma ascent and eruption processes in the western volcanoes. Given the young age of the Paphsanias volcano the crater may also show hydrothermal activity that we will be able to observe and sample using the ROV.Andesite magmas at active continental margins may form due to assimilation-fractional crystallization processes from basaltic mantle melts or due to direct partial melting of unusual mantle rocks resulting, for example, from mixing of sediment melts with peridotite. Magmas of the Aegean Arc indicate a reaction of the melts with the crust during the ascent as well as a strong input of sediment into the melting zone of the mantle wedge. These different mixing processes are difficult to define in most rocks and require detailed studies of melt (glass) and mineral compositions. Thus, submarine lavas are best suited for a study of andesite formation because melts are quenched and their composition including volatile contents can be determined. The volcanoes of the western Aegean mainly erupted effusive lavas in domes and flows rather than showing explosive activity. We propose a cruise to the westernmost submarine volcano Paphsanias of the Aegean Arc that has not been studied petrologically and geochemically. We suggest studying and sampling this volcano using an ROV that will give us stratigraphic control of the samples. The ROV dives will allow determining the relative abundance of lavas and volcaniclastic rocks and yield insights into the apparently different magma ascent and eruption processes in the western volcanoes. Given the young age of the Paphsanias volcano the crater may also show hydrothermal activity that we will be able to observe and sample using the ROV.</p>, , 2017-04-15, 2018-03-31, , 2018-03-31, 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>]>
publications: <QuerySet [<Publication: Enrichment of H2O and fluid-soluble trace elements in the Troodos Ophiolite: Evidence for a near-trench origin>, <Publication: Constraints on the Northwestern Atlantic Deep Water Circulation From Pa-231/Th-230 During the Last 30,000 Years>, <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: Geochemical mapping of a paleo-subduction zone beneath the Troodos
Ophiolite>, <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: Petrogenesis of boninitic lavas from the Troodos Ophiolite, and comparison with Izu–Bonin–Mariana fore-arc crust>, <Publication: Magmatic evolution and source variations at the Nifonea Ridge (New Hebrides Island Arc)>, <Publication: Primitive andesites from the Taupo Volcanic Zone formed by magma mixing>, <Publication: Geodynamic constraints from glass geochemistry in the Troodos ophiolite>, <Publication: Spatial variability of source composition and petrogenesis in rift and rift flank alkaline lavas from the Eger Rift, Central Europe>]>
fobes: <QuerySet []>
orgas: <QuerySet []>
