Competitive 10Be measurements below 1MeV with the upgraded ETH–TANDY AMS facility

Spatial variability of 10 Be-derived erosion rates across the southern Peninsular Indian escarpment: A key to landscape evolution across passive margins

“…Additional contributions from mantle dynamics (Becker and Faccenna, 2011) cannot be excluded but require more investigation. We decipher no evidence of accelerated and focused erosion to corroborate antiformal uplift in Late Oligocene to Recent times due to lithospheric buckling (Müller et al, 2014). However, remembering that Neogene folds in the southeast Indian Ocean have grown by less than a few hundred meters Scrutton, 1990, 1992) over the last ∼8 Ma (Curray and Munasinghe, 1989), a comparatively slow lithospheric buckling of continental Peninsular India would be largely unrecorded in the 10 Be-derived millennial-scale erosion rates.…”

“…Like for other passive margins, the history and persistence of this topography is a matter of debate (Gunnell and Radhakrishna, 2001 and references therein), as to whether the high topography is in a state of quasi-equilibrium, maintained isostatically by slow decay over geological time, or whether it has been rejuvenated during the Neogene (Bonnet et al, 2014). The discovery of buckle folds in the Indian Ocean lithosphere Scrutton, 1990, 1992;Beekman et al, 1996) has also led to hypothesize that large-scale buckling of the Indian continental lithosphere may be a consequence of India-Eurasia collision (Müller et al, 2014), with high topography signalling antiformal lithospheric buckles. Although such mechanisms should in principle be measurable, the scarcity of geomorphic markers with which to gauge subtle, long-wavelength deformation in the eroding upland landscapes of southern Peninsular India makes quantitative measurements challenging.…”

Accelerator Mass Spectrometry of 129I towards its lower limits

“…[14] that includes upgrades of the NEC MC-SNICS ion source and the addition of a second 130°high-energy magnet [15].…”

The Chironico landslide (Valle Leventina, southern Swiss Alps): age and evolution

“…10 Be was measured at the AMS facility in the Laboratory of Ion Beam Physics at ETH Zurich, Switzerland, using both the 0.5 MV Tandy (Müller et al 2010) and 6 MV Tandem accelerator (Table 1, samples with a). The 10 Be/ 9 Be ratios for both accelerators (Kubik and Christl 2010;Müller et al 2010) were measured against ETH inhouse standards calibrated to 07KNSTD standard of Nishiizumi et al (2007).…”

“…The 10 Be/ 9 Be ratios for both accelerators (Kubik and Christl 2010;Müller et al 2010) were measured against ETH inhouse standards calibrated to 07KNSTD standard of Nishiizumi et al (2007). All ratios were corrected for a blank value of 3.0 ± 0.5 9 10 -15 , which is consistent for both machines.…”