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Welcome to the National Cosmogenic Nuclides Laboratory - LN2C

The National Cosmogenic Nuclides Laboratory (LN2C in french) is a structure dedicated to the use of cosmogenic nuclides in Earth Sciences, notably via the preparation of samples and the measurements of cosmogenic isotopes. Its mission is to provide an effective access to this methodology to the French scientific community, for research projects in the following fields: natural hazards and risks, linked for example to earthquakes or landslides past climate change, for example with the dating of markers associated to glaciations landscape dynamics and the determination of current and past denudation rates dating of archaeological sites and objects. investigation of the magnetic field evolution over time The LN2C consists of a set of laboratories allowing the purification and preparation of different types of sample (rocks, soils, water, etc.) as well as the measurement of different isotopic ratios (10Be/9Be, 26Al/27Al, 36Cl/35Cl, ...) by the national 5MV AMS (Accelerator Mass Spectrometer) facility ASTER. The LN2C regroups faculty members, research scientists, engineers and technicians from Aix Marseille University, CNRS and IRD. The LN2C was founded by Didier Bourlès (AMU Professor), and is hosted by CEREGE on the Technopôle de l'Arbois domain in Aix-en-Provence since 2006.

The installation of the ASTER instrument was possible due to an initial investment by the Bouches du Rhône General Council, the European Regional Development Fund (FEDER), CNRS, IRD and the Provence-Alpes-Côte d'Azur Region council. The LN2C is a technological platform of Aix-Marseille University and is part of the REGEF network. Its operation is supported by a recurring endowment from CNRS and IRD. The LN2C benefited from the Investments for the Future Program via EQUIPEX ASTER-CEREGE, which notably enabled the installation of a high energy source for ASTER.

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Panoply Landscape evolution Chlorine 36 EUROPEAN ALPS Denudation Climate Cosmogenic Nuclides Antarctic Peninsula Chlorine-36 Devensian Cosmic ray exposure dating Active faults Dating Chlorine Cosmogenic burial dating CLIMATIC CHANGES Bearing phases Cosmogenic surface-exposure dating Lake sediment Burial dating Cosmogenic 10Be Carbonate Pyrenees Analyse géochimique Byers Peninsula Luminescence dating Eastern Tibetan Plateau 14CdatingPeruvian Andes Cosmogenic dating Badain jaran desert Cosmogenic nuclide dating EQUILIBRIUM-LINE ALTITUDE 36Cl cosmic-ray exposure dating Cirque Paleoseismology Beryllium-10 Deep drilling Earth Eruptive history Denudation rates Cosmonuclide Holocene Kerguelen Himalaya Analyse isotopique Block slope Constraints Antarctic Cold Reversal Evolution FRENCH ALPS Carbonates Cosmogenic nuclide Calcaire crétacé 36 cl cosmic-ray exposure dating Glacier fluctuations Aquifère côtier Automated bench 42 ka event Cosmogenic nuclides Active fault Deep-seated gravitational deformation Australia Continental Escarpment Bhutan Beryllium Buzzsaw Radiocarbon Chernobyl 21Ne Authigenic 10Be/ 9 Be dating Cave deposits Cosmogenic 26Al Surface exposure dating Angola Accelerator mass spectrometry Bolivian Altiplano Azanaques Denudation rate Lava flows Ages Calibration Authigenic 10Be/9Be ratio Terrestrial cosmogenic nuclides TCN Challapata fan-delta Asterobelt Chiba composite section Incision rates 10Be Paleoclimate Cluster COSMOGENIC NUCLIDES Dartmoor Cosmogenic preparation Aluminum Conundrum Chlore-36 Consensus values Collection area EGESEN MORAINE


Latest submissions in HAL !

[hal-03194765] Seismo‐tectonic model for the southern Pre‐Rif border (Northern Morocco): Insights from morphochronology

Located at the southern boundary of the Alpine chain in Morocco, the deformation front of the Southern Rif Mountains is a region of moderate tectonic activity, which makes it a good natural laboratory to understand whether, and how, low compressional strains are located on specific structures. Along the ≈80 km‐long left‐lateral, transpressive and reverse fault zone that runs at the toe of the Pre‐Rif Ridges, an analysis of high‐resolution digital topography provides new geomorphic lines of evidence supporting Quaternary activity along, 20 km‐long fault segments. The fault zone can be divided into the Meknès and the Fès segments, which are constrained at depth by reactivated, NE‐trending basement faults, delimitating paleo‐grabens associated with the Late Triassic‐Jurassic opening of the Atlantic Ocean. For selected sites, we used in situ‐produced 36Cl, 10Be and 26Al and high‐resolution topography to infer the timing of abandonment of fluvial markers, which suggest incision rates on the order of 0.6‐2 mm/yr. Given their lengths, scaling laws suggest that the identified fault segments should root at about 7‐12 km‐depth, possibly reactivating former basement normal faults and making them potential seismogenic sources capable of generating Mw6+ earthquakes, with return times of the order of several hundreds of years. Our new morphochronological dataset confirms that the Southern Rif deformation front is a key structure that may have accommodated most of the lateral extrusion of the Rif between the Nubia and Iberia tectonic plates

[hal-00878262] Étude géomorphologique du delta du Rhône : évolution des milieux de sédimentation fluviatiles au cours de l'Holocène récent


[insu-03193092] Spatial continuous integration of Phanerozoic global biogeochemistry and climate





Catherine Beaussier
Tél. (+33) 4 95 04 41 43
Vincent Godard
Tél. (+33) 4 13 94 92 10

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