Oscar Marchhart

Spatial variability of denudation rates and transient landscape adjustment in low‐deforming mountains (the Strengbach catchment, Vosges Mountains, France)

Bastien Mathieux, Daniel S. Moreno Martin, J. van der Woerd, Raphaël di Chiara Roupert et autres

Abstract A set of 10 Be‐derived catchment‐wide denudation (CWD) rates in a low mountain catchment of western Europe (Strengbach catchment, Vosges Mountains) are analysed to discuss landscape stability. Together with a morphometric study, the data highlight the heterogeneous behaviour of the main …

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The Blaubeuren Meteorite and its new Sibling: New Find in Close Vicinity Suggests a Complex Exposure History

Markus Patzek, Devansh Paliwal, Daniela Krietsch, Jean Alix Barrat et autres

Introduction: The Blaubeuren meteorite was discovered in 1989 in southern Germany by a homeowner digging a cable trench in his garden, though it remained unrecognized as a meteorite until 2020. It is an H4-5 ordinary chondrite breccia weighing over 30 kg and …

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Quaternary terrace formation in response to climate, regional uplift and local normal faulting: The Danube terrace staircase of Vienna

Bernhard Salcher, Stephanie Neuhuber, Jan‐Christoph Otto, Tom Payer et autres

Quaternary terrace sequences can be observed along many mid to high latitudinal rivers, often reflecting a distinct, climate-related cyclicity of the fluvial system in uplifting regions. They are also essential landforms in many continental basins even though local basin subsidence may counteract …

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Testing grain size dependent variability of cosmogenic nuclide concentrations for isochron burial dating of fluvial sediment (Pannonian Basin, Hungary)

Zsófia Ruszkiczay-Rüdiger, Gábor Csillag, Alexander Wieser, Oscar Marchhart et autres

In this study a new approach of cosmogenic radionuclide (CRN) isochron burial dating was developed for locations where the maximum clast size of the sediment does not reach the size of using single cobble samples. This modification makes use of the presumption …

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The fall of the Haag (LL4-6) chondrite breccia—Just 8 years after the nearby fall Stubenberg (LL6)

A. Bischoff, Markus Patzek, Jean-Alix Barrat, Stig Bartel et autres

On October 24, 2024, an impressive fireball was visible over Austria. After the possible strewn field was calculated, the first sample of the Haag meteorite, with a mass of 8.76 g, was discovered on November 2, 2024, 8 days after the fireball …

The fall of the Haag ( LL4 ‐6) chondrite breccia—Just 8 years after the nearby fall Stubenberg ( LL6 )

A. Bischoff, Markus Patzek, Jean‐Alix Barrat, Stig Bartel et autres

Abstract On October 24, 2024, an impressive fireball was visible over Austria. After the possible strewn field was calculated, the first sample of the Haag meteorite, with a mass of 8.76 g, was discovered on November 2, 2024, 8 days after the …

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Catastrophic disruption of asteroid 2023 CX1 and implications for planetary defence

Auriane Egal, Denis Vida, F. Colas, B. Zanda et autres

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A terrestrial rock instead of an ureilite: Caution is recommended to scientists working on material received from meteorite collections

Lidia Pittarello, Stepan M. Chernonozhkin, Oscar Marchhart, Martin Martschini et autres

Abstract Planetary scientists heavily depend on meteorite curation facilities for the preparation and allocation of protected (e.g., Antarctic), highly valuable extraterrestrial specimens. In this work, a fragment of the Dyalpur ureilite obtained from a museum is discussed. The sample is found to …

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First performance tests of the new advanced radiofrequency quadrupole for ALIS at the test bench setup at VERA

Oscar Marchhart, M. Schiffer, Martin Martschini, Gereon Weingarten et autres

A new advanced radiofrequency quadrupole (RFQ) ion cooler for accelerator mass spectrometry has been developed for the Anion Laser Isobar Separator (ALIS) at CologneAMS. Based on the Ion-Laser Interaction Mass Spectrometry (ILIAMS) setup at the Vienna Environmental Research Accelerator (VERA), it features …

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Cosmogenic radionuclide exposure ages from the Enns and Mur Glaciers in the Eastern Alps (Styria/Austria)

Gerit E.U. Griesmeier, Stephanie Neuhuber, Sandra M. Braumann, Jürgen M. Reitner et autres

The European Alps were covered by a large interconnected system of valley glaciers during the Last Glacial Maximum (LGM). Many of the glaciers advanced into the Alpine Foreland leaving large latero-frontal moraine complexes suitable for (direct) exposure age dating and correlation of …

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Fifty months of instrumental accelerator mass spectrometry (IAMS) for long-lived cosmogenic radionuclides

Silke Merchel, Oscar Marchhart, Martin Martschini, Alexander Wieser et autres

Ion-laser-interaction mass spectrometry of ⁹⁰Sr for industrial scale operation

Oscar Marchhart

⁹⁰Sr (T1/2=28.91 a) ist ein hochgradig radiotoxisches Nuklid, das mit hoher Ausbeute bei der Kernspaltung entsteht. Der Ursprung und die globale Verbreitung sind durch Freisetzungen aus atmosphärischen Kernwaffentests, Kernkraftwerken oder Wiederaufbereitungsanlagen nahezu ausschließlich anthropogener Natur. Die Arbeit demonstriert die Durchführbarkeit der Messung …