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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]

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Remote sensing of the outgoing surface infrared-radiation of regional faults and its geophysical indicators / N. Vilor 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 115 - 128 Titre : Remote sensing of the outgoing surface infrared-radiation of regional faults and its geophysical indicators Type de document : Article/Communication Auteurs : N. Vilor, Auteur ; S.A. Tashchilin, Auteur ; A.V. Kluchevskii, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 115 - 128 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photo-interprétation [Termes IGN] Afrique du nord-est [Termes IGN] Chine [Termes IGN] Etats-Unis [Termes IGN] image infrarouge [Termes IGN] image thermique [Termes IGN] indicateur [Termes IGN] rayonnement infrarouge [Termes IGN] Russie Résumé : (Auteur) Investigations with the use of IR satellite maps were conducted on parts of the Baikal Rift Zone (BRZ, East Siberia, Russia), the Tarim platform (north-west China), the San Andreas transform-fault, the Great Basin (western part of the USA), the Afar depression (north-east Africa) and the Rhine graben (west Germany). It has been determined that the localized IR-radiation correlates with geophysical parameters, locations of hot water springs and geochemical anomalies. High intensity of the outgoing ground-based IR flow, which is registered by the ASs, is spatially localized on the surface of seismo-active faults and tectogenic slopes, which are formed in the zone of dynamic influence of the fault ZDIF. The outgoing surface IR flow depends on the state of the active ground layer due to the drift of thermodynamic temperature for the area observed from ASs. The identified value of the flow, which is independent of it, represent quasi-steady IR flow Iconst Quasi-steady IR flows of faults are identified by minima of seasonal increments in the IR domain, make 85.46 + 112.24 MW/m2.ster./tm and correspond to their proper surface IR radiation. Mathematical investigations allow one to identify low-frequency oscillations having the length of the geometric wave equal to 94.23 km, the amplitude being about 2.2 MW/m2.ster./um. The complete power of the outgoing surface flow of IR-radiation corresponds to the power of its low-frequency component. The valuable powers of the flow for the high-frequency domain are bound up with the geometric wavelength being not less than 20 km. The energetic contribution of the elements having the wavelength Numéro de notice : A2009-562 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30191 [article]

Exemplaires(1)

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