285 research outputs found
Burial temperatures in the Northern Apennines foredeep basins: a combined apatite fission-track and (U-Th)/He approach.
No full text[ATTO DI CONVEGNO
DETRITAL FISSION TRACKANALYSIS AND SEDIMENTARY PETROFACIES AS KEYS OF ALPINE EXHUMATION:THE EXAMPLE OF THE VENETIAN FORELAND (EUROPEAN SOUTHERN ALPS, ITALY)
No full textIntegrated provenance and detrital thermochronology studies in the ANDRILL AND-2A drill core: Late Oligocene-Early Miocene exhumation of the Transantarctic Mountains (Southern Victoria Land, Antarctica)
No full textP>Detrital apatite fission-track data combined with provenance analysis of gravel-fraction detritus are used in this study to investigate the Neogene exhumation of the West Antarctic Rift System. Samples have been collected from the upper 1000 m of the ANDRILL AND-2A drill core, which documents the Miocene history of the Victoria Land Basin. Most samples have apatites with fission-track ages between 23 and 36 Ma and gravel clasts derived from the Erebus Volcanic Province and the Transantarctic Mountains exposed along the southern Victoria Land coast. These results indicate the existence of a so far undetected Oligocene/Early Miocene exhumation phase in the region between the Blue-Koettlitz and Skelton-Mulock glaciers, suggesting the importance of fluctuation of local glaciers in the Royal Society Range and/or expansions into the McMurdo Sound of an ice sheet mainly sourced by larger outlet glaciers located further south
Low-temperature thermochronological evolution along a Chilean transect between 23° and 24° latitude south: a proxy of prolonged subduction along the Andean continental margin
No full textExhumation of the western Qinling mountain range and the building of the northeastern margin of the Tibetan Plateau
No full textThis study presents new apatite fission-track data collected from intrusive and sedimentary rocks of the western Qinling mountain range. Results show a large range of data, with ages spanning from Upper Jurassic to Oligocene. No particular age-elevation relationships have been detected. Thermal modelling shows clearly that the region was affected by a nearly steady-state slow cooling starting from the Jurassic. This is particularly true for samples collected north of the West Qinling Fault whereas samples collected to the south show a re-heating event, followed by enhanced exhumation. As a whole, these data testify that the studied part of the western Qinling region was relatively stable for a long period and relatively insensitive to the tectonics related to the growth of the Tibetan Plateau. The present-day relief is mainly the result of transtensional tectonics that occurred in the Eocene
Alpine exhumation determined by fission-tracks analysis and petrography of Tertiary sandstones of the Veneto foreland
No full text
Raman microspectroscopy: A non-destructive tool for routine calibration of apatite crystallographic structure for fission-track analyses
No full textCompositional control on the annealing kinetics of fission-tracks (FT) in apatite requires routine measurement of sample grain composition. However, for practical reasons the bulk composition of analysed grains is not routinely measured and instead grain chlorine content or etch-pit dimensions are used to characterise a samples annealing behaviour. A more desirable approach is to measure crystallographic parameters (i.e. unit cell dimension) of a grain as these represent the summed effect of all substitutions and crystal defects. We show how Raman microspectrometry can be used as a routine non-destructive tool to obtain rapid measurement of the crystallographic structure of apatite grains etched for FT analysis. Variations of unit cell parameter a are found to correspond to a systematic variation of Raman shift in the range of 452–440 cm− 1 for measurements made on c-parallel sections of apatite where the direction of the polarized incident beam is parallel to the c axis
Data for: Exhumation of the Western Qinling and the building of the northeastern margin of the Tibetan Plateau
No full textSingle grain-age data calculated by Trackkey softwar
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