Research Methods and Areas We combine methods of paleo-, rock and environmental magnetism, electromagnetics and sediment physics to analyze the composition, age, provenance and diagenesis of marine sediments. In the coast and shelf zone, we investigate how sediments are being sorted and distributed. We analyze deep sea and continental margin sediments to reconstruct variations of ocean circulation, of climate and of the Earths magnetic field. We explore the physical and mineralogical fundamentals of rock magnetism, develop new exploration methods for marine freshwater seeps and mineral ressources and offer competent Geo Consulting services related to applied magnetic methods.
Coast and Shelf Scientists:Tilo von Dobeneck, Tobias Kulgemeyer, Wei Leng, Hendrik Müller (BGR) Methods: Enviromagnetics, Electromagnetics, Hydroacoustics, Sedimentology Projects: MARUM SD1, MARUM SD2, INTERCOAST, ArcTrain Topics: Large spatial variations in magnetic and heavy mineral content are typical for sublittoral sediment facies. These patterns reflect modern sediment dynamics driven by waves, tides and currents as well as relict structures of past sea-level change and glaciation. With enviromagnetic and electromagnetic methods we can map these structures to reveal sediment facies, sources, transport pathways and fractionation mechanisms. more »
Ocean and Climate Scientists:Janna Just, Thomas Frederichs, Edoardo Dallanave, Tilo von Dobeneck Methods: Enviromagnetics, Magnetostratigraphy, Core Logging, Sedimentology Projects:MARUM OC, INOPEX, IODP Topics: Changing continental, oceanic and sedimentary environments modify the magnetic composition and grain-size as well as color and porosity of ocean sediments. Based on rock magnetic and physical properties measurements we can reconstruct formation conditions, redox history and age of the deposits in high detail. more »
Paleomagnetism Scientists: Edoardo Dallanave, Thomas Frederichs, Janna Just, Xuesen Li, Tilo von Dobeneck Methods: Magnetostratigraphy, Relative Paleointensities, Cyclostratigraphy Projects:INOPEX, IODP Topics: Geomagnetic pole positions, field intensities and polarities vary at time scales between 100 and 1.000.000 years. Sedimentary records of these changes form the basis of three paleomagnetic methods - paleosecular variation, relative paleointensity and magnetostratigraphy - which enable us to date sediment sequences of continental margins as well as deep sea basins. more »
Rock Magnetism Scientists:Thomas Frederichs, Wanzhang Wang, Janna Just, Tilo von Dobeneck Methods: Magnetic Remanence, Hysteresis and Susceptibility, Thermomagnetics Projects: DFG PP 1097, DFG Project BL 154/24, EUROPROX Topics: All magnetic methods in geophysics rely on less than ten natural iron minerals, which all have complex and characteristic ferromagnetic properties. We command over a range of highly sensitive automated instruments to determine composition, concentration, grain-size and oxidation state of magnetic mineral assemblages in sediments and rocks. more »
Marine Magnetics Scientists: Hendrik Müller (BGR), Christian Hilgenfeldt, Thomas Frederichs, Tilo von Dobeneck Methods: Marine Electromagnetics and Magnetics, Rock Magnetics Projects:BGR GoldenEye, BGR INDEX Topics: Marine mineral resources such as hydrothermal polymetallic sulphides, ferromanganese crusts, iron and phosphorite sands stand out by their deviant magnetic and/or conductive properties. We develop and deploy electromagnetic subsea survey systems for the research and exploration of precious mineral deposits from coast to deep sea. Integrated benthos cameras assess the morphology and colonization of the seafloor. more »
Geo Consulting Scientists:Hendrik Müller (BGR), Christian Hilgenfeldt, Thomas Frederichs, Tilo von Dobeneck Methods: Marine Magnetics und Elektromagnetics, Field and Rock Magnetics Clients: K+S, Wintershall, RWE Dea, Patzold Köbke & Partner, Global Tech I, KED Ingenieure Topics: Unknown ordnance, pipeline and cable surveys for the foundation ground examination of offshore contructions? Archeomagnetic prospection? Noxious iron minerals in salt or reservoir rocks? Our special magnetic measurements at sea, on land and in the laboratory, in combination with with competent consulting, can conveniently solve your mining or building problems. more »
