In this webinar you learn:
* how to correctly implement typical measures like stone piles or plantings
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when is the right time to plant native species
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where you can find suitable materials like plants, wood or stones
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what is important in the context of collective implementation, p. ex. during interventions in nature

Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) is a microanalytical technique that has driven major advances across the Earth sciences. It enables quantitative trace element and isotopic analysis of geomaterials at the ppm level across nearly the full mass range of the periodic table. This talk explores the opportunities opened up by LA-ICP-MS imaging, as well as the challenges involved in applying the method.
Uranium-lead (U-Pb) dating of calcite is challenging because calcite commonly contains very low uranium and high initial lead concentrations, yet it offers exciting possibilities for dating calcite veins in mountain belts, fossil-free ancient limestones, and ore-bearing vein systems. This talk demonstrates how a U-Pb image-mapping approach can overcome key limitations of the calcite U-Pb system, including low U concentrations and high initial Pb.
Pixels on a U-Pb age map can be pooled into “analyses” according to their elemental or isotopic ratio distributions, generating a spread of U-Pb data on concordia. Regions affected by detrital components or chemically distinct carbonate generations can then be excluded using user-defined regions of interest or chemical criteria. The approach also allows direct correlation with complementary microtextural datasets, including optical petrography, cathodoluminescence, Raman spectroscopy, and EBSD maps, and is readily extendable to other LA-ICP-(MS)-MS geochronological systems, including Rb-Sr dating of micas.
Applications from a range of geological settings will be presented, including the Carboniferous North Dublin Basin, where late Eocene LA-ICP-MS U-Pb ages from calcite veins linked to folding and flexural-slip deformation record far-field, N-directed shortening associated with the Alpine-Pyrenean orogenies, together with examples using beta-decay chronometers.

Understanding ocean chemistry and the sources and sinks of major elements to the ocean is fundamental to our understanding of climate, atmospheric CO₂, and feedback mechanisms across both geological and anthropogenic timescales. This study quantifies the role of long-term submarine groundwater discharge (SGD) in the ocean's chemical budget by compiling a large dataset of end-member data and establishes the timescale-dependent effects of SGD on major-element cycling. We demonstrate that long-term SGD acts as a significant source in the Ca and Sr budgets, and as a net sink in the K and Na budgets. Because coastal aquifer fluxes are tightly coupled to sea-level change, SGD has the potential to influence climate through biogeochemical feedback mechanisms. Sea-level drop enhances outflux from coastal aquifers to the ocean at the expense of seawater intrusion, while sea-level rise suppresses this outflux. Geometric estimates of aquifer-driven flux changes suggest that these shifts can alter the ratio of Ca relative to other ions contributing to alkalinity, resulting in increasing atmospheric CO₂ during sea-level lowstands (glacial cooling) and reducing CO₂ during highstands (interglacial warming). Coastal aquifers may therefore act as a geochemical moderator of glacial-interglacial climate oscillations, constituting a previously underappreciated negative feedback mechanism.

This work investigates the long-term tectonic evolution of the Western Alpine foreland and the interactions between deformation, fluid circulation, and crustal-scale geodynamic processes in peri-orogenic domains. Combining structural geology, paleostress reconstruction, in-situ U–Pb carbonate geochronology, and 3D geological modeling, the study aims to better constrain the timing, propagation, and reactivation of brittle deformation from the Mesozoic to the present day in SE France and the Western Alps. Particular emphasis is placed on the direct dating of fault-related carbonates through the development and application of in-situ calcite U–Pb geochronology at the ISTerre laboratory. The integration of geochronological, structural, and geophysical datasets highlights the complex succession of extensional, compressional, and strike-slip tectonic phases affecting both sedimentary cover units and the crystalline basement, while providing new insights into the role of crustal inheritance and lithospheric-scale controls on deformation localization.

Organic ma*er is expected to be a key component of bodies formed in the outer regions of planetary systems. In the Solar System, measured moments of iner=a, interpreted with equa=ons of state for ices, silicates, and carbonaceous materials, suggest that organics may cons=tute a major frac=on of the refractory interiors of several icy bodies (e.g., Reynard & So=n, 2023; Delarue et al., 2026). Organics may therefore exert a first-order control on thermochemical evolu=on and vola=le produc=on—an idea that is par=cularly =mely given the growing popula=on of low-density exoplanets. The presenta=on will summarize recent work aiming at (i) predic=ng the occurrence of organic-rich vola=le worlds from host-star elemental abundances, and (ii) quan=fying the impact of carbon/organics on thermochemical evolu=on. On the occurrence side, stellar abundance pa*erns are used to iden=fy systems in which the available refractory and vola=le budgets favor carbonrich/organic-rich condensates beyond the relevant condensa=on fronts. On the interior side, evolu=on is modeled by combining equa=ons of state for ices, silicates and carbonaceous materials with kine=c descrip=ons of the transforma=on of a representa=ve organic compound as a func=on of =me and temperature. The kine=c scheme tracks the progressive loss of H and heteroatoms from the carbonaceous phase, the associated increase in residual carbon density toward graphite-like values, and the produc=on of mobile vola=les. These processes feed back on the thermal history and set the =me-dependent inventories of poten=ally releasable species. Model outputs are used to quan=fy expected vola=le release for Titan-like bodies and carbon-rich exoplanets, and to contrast these outcomes with classical telluric and ice–silicate evolu=on pathways. Implica=ons for JWST-era characteriza=on of low-density planets, and for joint constraints from mass–radius measurements, stellar abundances, and interior evolu=on models, are discussed.

In this webinar you learn:
* what are the principles that count for maintenance close to the natural state
* when is the right time to mow – and when to let nature take its course
* which tools are useful and why less technology often means better results
* how to establish a maintenance plan adapted to your surface and compatible with your daily life