| Titre | Differential exhumation at eastern margin of the Tibetan Plateau, from apatite fission-track thermochronology |
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| Auteur | Deng, B; Liu, S G; Li, Z W ; Jansa, L F; Liu, S; Wang, G Z; Sun, W |
| Source | Tectonophysics vol. 591, SI, 2013 p. 98-115, https://doi.org/10.1016/j.tecto.2012.11.012 |
| Image |  |
| Année | 2013 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200282 |
| Éditeur | Elsevier |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1016/j.tecto.2012.11.012 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Lat/Long OENS | 105.0000 108.0000 31.3333 29.3333 |
| Sujets | apatite; traces de fission; Plateau de Tibetan ; Bassin de Sichuan ; géochronologie; Cénozoïque |
| Illustrations | cartes de localisation; coupes transversales; tableaux; histogrammes; graphiques |
| Diffusé | 2012 11 27 |
| Résumé | (disponible en anglais seulement)
New apatite fission-track (AFT) ages from Mesozoic sediments in the Sichuan basin, combined with previous fission-track data, demonstrate differential uplift
and exhumation across the basin. Particularly significant change in exhumation (at least similar to 2000 m) was found across the Huaying Mts. Modeled temperature-time histories and the Boomerang plot of AFT dataset across the basin suggest rapid
cooling and exhumation events during 120-80 Ma and at 20-10 Ma. They reflect the start of the basin-scale differential uplift and exhumation which effected the eastern growth of Tibetan Plateau. In particular, nested old-age center separated by
Huaying Mts. was found in the center-to-northwest part of the Sichuan basin. A simplified one-dimensional, steady-state solution model was developed to calculate the mean exhumation rate, which is 0.05-0.2 mm/yr in most parts of the basin. It
suggests a slow exhumation across much of the basin. The regional pattern of AFT age, length and erosion rate supports a progressive change from the nested old-age center towards the southwest. This pattern supports the idea of a prolonged,
steady-state uplift and exhumation process across the basin, controlled by cratonic basin structure. The eastern growth of the Tibetan Plateau has exerted a significant effect on the rapid exhumation of the southwestern part of the Sichuan basin, but
not on all of the basin during the Late Cenozoic. |
| GEOSCAN ID | 326694 |
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