High-resolution speleothem paleoclimate records with annual to seasonal resolution are helpful for detailed analysis of climatic changes with limited duration (e.g., volcanic climate impacts), but also for longer-duration events (e.g., at 8.2 ka or 4.2 ka). A high resolution paleoclimate data set is also mandatory for meaningful comparison with archaeological or historical records. Low stalagmite growth rates could impede the acquisition of high-resolution isotope data with the classical micro-milling approach and isotope ratio mass spectrometry...
Systematic analysis of precision, long-term stability and data processing of MC-ICP-MS 230Th/U-dating of secondary carbonatesInga Kristina Kerber , Fabian Kontor , Jennifer Arps , René Eichstädter , Sophie Warken & Norbert Frank
MC-ICP-MS has become the clearly dominant technology in 230Th/U-dating over the last 20 years. The ongoing increase in measurement performance allows for ε-precision by now (Andersen et al., 2004; Cheng et al., 2013) and enabled the production of a large amount of datasets and insights covering a broad range of fields. Despite this large database, systematic studies on the impact of individual corrections on the raw data, long-term instrumental stability and on data processing routines...
Digging into Eocene hothouse climate variability: Linking X-ray fluorescence (XRF) scanning and palynology of Messel sediment coresStefanie Kaboth-Bahr , André Bahr , Olaf Lenz , Volker Wilde , Sonja Wedmann & Jörg Pross
The late early to early middle Eocene (~48 Ma) maar lake sediments of the famous Messel fossil-pit, located near Darmstadt, SW Germany, represent a prime archive for climate dynamics operating during the geologically most recent greenhouse period of the Earth. In this study, we investigate the potential of geochemical data obtained via high-resolution XRF core scanning to decipher hydrologic variability from the Messel sediments. Such data have the potential to yield insight into the paleoenvironmental...
The Werra-Fulda mining district, underground extension of the CEVP-alkaline magmatic province – New insights in the magmatic evolution and its interaction with evaporitic deposits.Axel Zirkler , Ulrich A. Glasmacher , Florian Krob , Silvio Zeibig , Jochen Olbert & Istvan Dunkl
The Werra-Fulda mining district located in Central Germany hosts a world-class deposit of sulfate bearing potash salts. The Permian (Zechstein, ca. 255 Ma) evaporite sequence was intruded by mafic melts in the Neogene resulting in magmatic dykes as well as sill structures frequently observed in the subsurface mining galleries. Furthermore, volcanic rocks intersect the overlaying strata (mainly Buntsandstein and Muschelkalk) at localized spots forming distinct mountains. In this study, samples from subsurface mafic dykes and...
Benthic foraminifera inhabit diverse marine environments, including areas of persistent bottom currents and contourite drift deposition. Certain highly adapted epibenthic foraminifera colonize contourite deposits as opportunistic suspension feeders. A correlation between these assemblages and high bottom current velocities has been highlighted in previous studies from the Iberian Margin (e.g. Schönfeld, 2002), suggesting their applicability as reliable proxy for reconstructing bottom currents. Our ongoing project aims to document biogeographic patterns of benthic foraminifera from extended contourite...
In Germany, the first apatite fission-track study was performed in the Odenwald (Wagner 1968) with the results of Mesozoic apatite fission-track ages. The presentation will re-examine the Mesozoic-Cenozoic exhumation history of the Odenwald and Heidelberg area with new thermochronological data. The Odenwald as part of the Mid-German Crystalline Zone is characterized by outcrops of the Variscan basement and overlain Mesozoic and Cenozoic strata. Towards the West, the Variscan Basement is bound by the Upper Rhine...
Intragranular halogen (F, Cl, Br), S and δ37Cl variability as determined by SIMS in sodalite and eudialyte from the Ilímaussaq intrusion, South GreenlandHans G. M. Eggenkamp, Michael A. W. Marks , Thomas Ludwig & Gregor Markl
Halogen (F, Cl and Br), S and δ37Cl variations within grains of Cl-rich minerals sodalite and eudialyte from peralkaline rocks of the Ilímaussaq intrusion were determined using Secondary Ion Mass Spectrometry (SIMS). Samples show either sodalite and eudialyte in direct contact, or sodalite/eudialyte embedded in Cl-free minerals (nepheline, feldspar). Comparing samples allows deciphering potential halogen and S exchange between these minerals during rock cooling. Results suggest that sodalite (7 wt%) and eudialyte (1.2 wt%) have...
Shaping responsible future experts: the need for integrating Geoethics in Geoscience university educationDominic Hildebrandt
Geoscientific know-how is essential to tackle pressing challenges: climate change, geohazards, energy and raw material supply. However, technical expertise alone – without considering societal dimensions – will not be sufficient to find sustainable solutions to these problems. Geoethics literacy is needed to qualify Geoscientists to work responsibly on complex tasks at the interface to society. Also, Geoethics deals with our own Geoscience philosophy and can therefore help to address current problems in Geoscience academia –...
Climatic Fluctuations in the Early and Middle Copper Age - First Isotope Investigations at the Water Supply of Los Millares in SE SpainAnorte Elisabeth Jakowski , Andrea Schröder-Ritzrau & José Miguel Alonso Blanco
The Copper Age fortification of Los Millares is located 15 km north of Almería in Andalusia. At least between 3,541 BC (+/- 92 years) and 2,591 BC (+/- 22 years) there existed a water conduit, the so-called "aqueduct of Los Millares", with which water was conveyed to the settlement from a spring located about 1.25 km outside. U and Sr isotope analyses of groundwater samples in the catchment area as well as of the calcareous...
University of Göttingen2
University of Hohenheim1
The University of Texas at Austin1
University of Cologne1
Senckenberg Society for Nature Research1
Senckenberg Research Institute and Natural History Museum Frankfurt/M1
Rottenburg University of Applied Forest Sciences1
University of Tübingen1
University of Potsdam1