Centre de documentation
scientifique

Landsat tm and quickbird images for geological mapping in the syn-rift lower dogali formation (red sea coast, ne eritrea) / B. Antonielli in Photo interprétation, European journal of applied remote sensing, vol 45 n° 3 (septembre 2009)

Public [article]  inPhoto interprétation, European journal of applied remote sensing > vol 45 n° 3 (septembre 2009) . - pp 107 - 114 Titre : Landsat tm and quickbird images for geological mapping in the syn-rift lower dogali formation (red sea coast, ne eritrea) Type de document : Article/Communication Auteurs : B. Antonielli, Auteur ; F. Fidolini, Auteur ; G. Righini, Auteur Année de publication : 2009 Article en page(s) : pp 107 - 114 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photo-interprétation [Termes IGN] carte géologique [Termes IGN] Erythrée [Termes IGN] image Landsat-TM [Termes IGN] image optique [Termes IGN] image Quickbird [Termes IGN] photo-interprétation [Termes IGN] Rouge, mer [Termes IGN] système d'information géographique Résumé : (Auteur) Syn-rift Neogene deposits, composed of a 650 m thick volcano-sedimentary succession, crop out at the foot of the escarpment close to the village of Dogali, near Massawa (NE Eritrea). These deposits are related to the first stage of the Red Sea spreading. This work aims at mapping in detail this succession using remote sensing optical images integrated with ancillary data and ground truth information in a Geographic Information System. Optical images are usually effective in lithological discrimination in arid environment and fill the requirements of low-cost, rapid and accurate regional mapping. Photo-interpretation ofLandsat Thematic Mapper image was carried out in a test area of 500 km2 and Quickbird satellite images were used to detail a subset of 50 km2. The satellite images have been processed through radiometric enhancement, principal components analysis and band ratios. Ancillary data and evidences from field surveys supported the photo-interpretation. Rock samples, photos and observations collected during previous test campaigns provided interpre-tation keys of the satellite images. A preliminary scheme of the lithological units has been drawn from the Landsat image. The Proterozoic metamor-phic complex of the basement and the sedimentary fades of Lower Dogali Formation were mapped at scale ] :80,000. Evidences of laterites and base-ment weathering were also detected. A detailed analysis of sedimentary fades of the Lower Dogali Formation was then carried out using the Quickbird images at scale 1:10,000. The results of the photointerpretation of remotely sensed data confirm that the deposition of the Lower Dogali Formation is linked to the first stage of the Red Sea spreading and main considerations on the mecha--nisms and the evolution of different stages have been underlined. Although the next field campaign is going to endorse the remotely sensed data, these preliminary results give evidence of the contribu-tion of satellite images to the knowledge of the geo-logical setting of a poorly mapped area in arid environment. Numéro de notice : A2009-561 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30190 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
104-09031	SL	Revue	Centre de documentation	Revues en salle	Exclu du prêt