Fiche détaillée

Retour à la liste

Id 129
Auteur Pirouz, Mortaza
Titre Estimation of salt diapirs influence on land surface temperature using Landsat images: insights from Zagros Orogen
Sous-titre
Résumé
Summary The Zagros mountain belt is a part of the Alp-Himalayan chain. It is a result of the continent-continent collision between Arabian and Eurasian plates since Early Miocene (~20 Ma.). This region includes roughly about 12 km of sedimentary cover over the basement rock. This sedimentary cover decoupled from the basement rocks by Hormuz salt horizons. This salt unit has a thickness of the 2-4 km and extends mainly in the eastern sector of the Zagros. This Hormuz salt migrates upward and exposes at the surface as diapirs due to the regional contractional tectonic setting and its ductile behavior. The migration of the salt from minimum of 10 km depth to the surface causes heat transport to the surface and affects on the land surface temperature. The thermal band of the Tm and ETM satellite images are used to obtain temperature of the salt diapirs and their influence on the adjacent plains. Our result shows that salt diapirs have different temperature at the surface due to their different rate of activity. Temperature of the salt diapirs implies the amount of activity and extrusion. Our result shows that the salt diapirs in the northern part of the interior Fars region are 10 degrees warmer compared with southern alt diapirs. In addition, they have a large impact on the land surface temperature. The northern salt diapirs are located in higher altitude (~1200km) compared with southern salt diapirs. Although, the northern salt diapirs are located in the higher altitude and we expect to have colder surface temperature, but they are warmer due to their strong flow to the surface and high tectonic activity.
Volee 2012
Soutenance 2013-02-08
Sujet TM and ETM thermal band, Salt diapir, Land surface temperature, Zagros mountain belt, géomatique
   
Url 1 Rapport de stage
Url 2
Url 3