A5086919759- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Astronomical Observations and Instrumentation
- Geophysics and Gravity Measurements
- earthquake and tectonic studies
- Astro and Planetary Science
- High-pressure geophysics and materials
- Offshore Engineering and Technologies
- Planetary Science and Exploration
- Geomagnetism and Paleomagnetism Studies
- Spacecraft and Cryogenic Technologies
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Geological Modeling and Analysis
- Geology and Paleoclimatology Research
- Scientific Research and Discoveries
- Solar and Space Plasma Dynamics
- Drilling and Well Engineering
- Astronomy and Astrophysical Research
- Geochemistry and Elemental Analysis
- Reservoir Engineering and Simulation Methods
- Inertial Sensor and Navigation
- Satellite Image Processing and Photogrammetry
University of Cologne
2012-2024
Ruhr University Bochum
2023
Leibniz University Hannover
2018-2023
University of Bonn
2011-2018
International Ocean Discovery Program
2015
International Ocean Discovery Program (IODP) Expedition 352 recovered a high-fidelity record of volcanism related to subduction initiation in the Bonin fore-arc. Two sites (U1440 and U1441) located deep water nearer trench basalts rocks; two (U1439 U1442) shallower further from boninites rocks. Drilling both areas ended dolerites inferred be sheeted intrusive The apparently erupted immediately after have compositions similar those most depleted generated by rapid sea-floor spreading at...
Abstract The Izu‐Bonin‐Mariana (IBM) fore arc preserves igneous rock assemblages that formed during subduction initiation circa 52 Ma. International Ocean Discovery Program (IODP) Expedition 352 cored four sites in the near Ogasawara Plateau order to document magmatic response and physical, petrologic, chemical stratigraphy of a nascent zone. Two these (U1440 U1441) are underlain by fore‐arc basalt (FAB). FABs have mid‐ocean ridge (MORB)‐like compositions, however, FAB consistently lower...
Abstract International Ocean Discovery Program Expedition 352 to the Izu‐Bonin forearc cored over 800 m of basement comprising boninite and boninite‐series lavas. This is most extensive, well‐constrained suite series lavas ever obtained from in situ oceanic crust. The boninites are characterized as high‐silica (HSB), low‐silica (LSB), or basaltic based on their SiO 2 ‐MgO‐TiO relations. principal fractionation products all three high‐Mg andesites (HMA). Lavas recovered >250 meters below...
Potassium-enriched mafic lavas, and in particular basalts of the high-K series, are important end-members subduction zone volcanism. Two petrogenetic models can explain generation K-rich involving either melting ancient, enriched lithospheric mantle sources (single-stage model) or triggered by recent refertilization subduction-related components derived from subducted sediments oceanic crust (multi-stage model). These two tested for post-collisional rocks Eocene–Oligocene age Rhodopes, SE...
Igneous activity in the rear-arc of Paleogene Urumieh–Dokhtar Magmatic Belt Iran has to date been poorly studied. An example such activity, Late Eocene potassic mafic intermediate magmatic rocks Lahrud area NW Iran, is focus this work. These lavas include olivine-bearing clinopyroxene-phyric basalts, analcime-bearing leucite–clinopyroxene-phyric andesites, and trachytes, Paleocene–Early pyroclastic rocks. Monzo-syenite plugs (dated here at ∼37 Ma), basaltic dikes, leucite-bearing dikes...
Magmatism in the Cenozoic Central European Volcanic Province (CEVP) has been related to two geodynamic scenarios, either extensional tectonics north Alpine realm or upwelling of deep mantle material. The Oligocene (∼30–19 Ma) Siebengebirge Field (SVF) is a major part German portion CEVP and consists erosional remnants mafic felsic volcanic edifices. It covers an area ∼35 km (NW–SE) by ∼25 (SW–NE) with eruptive centres concentrated near eastern shore Rhine river vicinity city Bonn. Mafic...
Abstract How new subduction zones form is an ongoing scientific question with key implications for our understanding of how this process influences the behavior overriding plate. Here we focus on effects a Late Cretaceous subduction-initiation (SI) event in Iran and show SI caused enough extension to open back-arc basin NE Iran. The Torbat-e-Heydarieh ophiolite (THO) well exposed as part Sabzevar-Torbat-e-Heydarieh belt. It dominated by mantle peridotite, thin crustal sequence. THO sequence...
Abstract Quaternary rocks from the East and West Eifel volcanic fields in western Germany are a key suite of intraplate that can provide insights into volcanism Central European Volcanic Province (CEVP) continental general. We present comprehensive dataset for lavas including isotope as well major trace element data 59 samples covering representative compositions different fields. In line with previous studies, all SiO 2 -undersaturated, alkaline-rich mainly comprise primitive basanites,...
Tin has ten stable isotopes, providing the opportunity to investigate and discriminate nucleosynthetic isotope anomalies from mass-dependent mass-independent fractionation. Novel protocols for chemical separation (based on TBP-resin) MC-ICP-MS analyses are reported here high precision Sn measurements terrestrial rocks chondrites. Relative reference standard (NIST SRM 3161a), basalts chondrites show patterns that consistent with fractionation processes as well 115Sn radiogenic ingrowth 115In....
Abstract Many terrestrial silicate reservoirs display a characteristic depletion in Nb, which has been explained some studies by the presence of on Earth with superchondritic Nb/Ta. As one classical example, K-rich lavas from Sunda rear-arc, Indonesia, have invoked to tap such high-Nb/Ta reservoir. To elucidate petrogenetic processes active beneath Java rear-arc and causes for Nb/Ta these lavas, we studied samples somewhat enigmatic Javanese volcano Muria, allow conclusions regarding...
Mass fractions of Sn and In were determined in sixteen geological reference materials including basaltic/mafic (BCR‐2, BE‐N, BHVO‐1, BHVO‐2, BIR‐1, OKUM, W‐2, WS‐E), ultramafic (DTS‐2b, MUH‐1, PCC‐1, UB‐N) felsic/sedimentary (AGV‐2, JA‐1, SdAR‐M2, SdAR‐H1). Extensive digestion ion exchange separation tests carried out order to provide high yields (> 90% for Sn, > 85% In), low total procedural blanks (~ 1 ng < 3 pg In) analytical uncertainties the elements interest a variety silicate...
Abstract The positive Ti isotope versus SiO 2 ‐content correlation in igneous rocks reflects the fractional crystallization of Ti‐bearing oxide minerals. However, variations subduction‐related indicate that compositions their mantle sources are heterogeneous and additional mineral phases may promote fractionation. We have determined composition well‐characterized basalts, andesites boninites. Samples from Solomon Islands, Troodos ophiolite Cyprus, Cape Vogel Papua New Guinea show small but...