Fluid geochemistry versus tectonic setting: the case study of Morocco (Contributo in volume (capitolo o saggio))

Type

• Contributo in volume (capitolo o saggio) (Classe)
• Prodotto della ricerca (Classe)

Label

• Fluid geochemistry versus tectonic setting: the case study of Morocco (Contributo in volume (capitolo o saggio)) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1144/GSL.SP.2006.262.01.08 (literal)

Alternative label

• Tassi F.; Vaselli O.; Moratti G.; Piccardi L.; Minissale A.; Poreda R.; Delgado Huertas A.; Bendkik A.; Chenakeb M.;Tedesco D. (2006)
  Fluid geochemistry versus tectonic setting: the case study of Morocco
  in Tectonics of the Western Mediterranean and North Africa, 2006
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Tassi F.; Vaselli O.; Moratti G.; Piccardi L.; Minissale A.; Poreda R.; Delgado Huertas A.; Bendkik A.; Chenakeb M.;Tedesco D. (literal)

Pagina inizio

• 131 (literal)

Pagina fine

• 145 (literal)

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• London (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume

• Tectonics of the Western Mediterranean and North Africa (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana

• 262 (literal)

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• special publication n. 262, pp. 289-322 Moratti, G., Chalouan, A. (eds) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

• GSL Special Publications, Edited by G. Moratti and A. Chalouan (literal)

Note

• Google Scholar (literal)
• ISI Web of Science (WOS) (literal)
• Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Università degli Studi di Firenze, Dipartimento di Scienze della Terra, Firenze Seconda Università di Napoli, Caserta IGG-Sezione di Firenze Department of Earth and Environmental Sciences,Rochester, NY (U.S.A.) Estacion Experimental de Zaidin (CSIC), Granada (Spain) Ministère de l'Energie et des Mines, Direction du Devéloppement Minier, Rabat (Morocco) (literal)

Titolo

• Fluid geochemistry versus tectonic setting: the case study of Morocco (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#inCollana

• Tectonics of the Western Mediterranean and North Africa (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn

• 1-86239-202-1 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume

• Giovanna Moratti; Ahmed Chalouan (literal)

Abstract

• This paper presents the results of an extensive chemical and isotopic investigation on natural thermal and cold fluids (spring waters and associated gases) discharging throughout the main geological domains of Morocco. The chemical features of the thermal springs are mainly dependent on rock dissolution involving Triassic evaporite formations, producing either Na-Cl or Ca-SO(4) composition, although mixing with shallower connate high-saline waters in Neogene post-orogenic sedimentary layers cannot be ruled out. Only in the Moroccan Meseta and Anti-Atlas domains have spring discharges probably undergone equilibration as a result of water-rock interaction in granites. Of the chemical and isotopic features of the gas seeps, (3)He/(4) He ratios and delta(13)C -CO(2) values indicate the occurrence of a significant contribution of mantle-derived gas, especially at Oulmes (Moroccan Meseta) and Tinejdad-Erfoud (Anti-Atlas), where associated waters are found to equilibrate at relatively high temperatures (c. 130 degrees C). These areas are also characterized by the presence of Pliocene to Quaternary basaltic volcanic rocks. Thermal discharges located along the Rif front and related to the NE-SW-oriented main strike-slip faults are associated with a CH(4)(-) and/or N(2)-rich gas phase, derived respectively from a crustal or an atmospheric source. Some of them have significant contents of 3 He that could indicate the rising of mantle fluids. Such a striking isotopic signature, which is not related to any recent volcanism visible at surface, is likely to be associated with cooling magma at depth related to transpressive fault systems. Similarly, in the northeastern area, the small, although significant, enrichment of (3)He in the gas discharges seeping out along the Nekor seismic active fault and related to Pliocene-Quaternary basalts also suggests a deep-seated (magmatic) contribution. The distribution of thermal discharges is strongly related to the main active tectonic structures of Morocco. Moreover, this study indicates the presence of deep active tectonic structures in areas until now considered as stable. In particular, the NE-SW-trending Nekor fault may be part of a major system that extends to the Moroccan Meseta and into the Smaala-Oulmes fault system, thus emerging as a deep structure with crustal significance. (literal)

Prodotto di

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Geologia del Quaternario, valutazioni di pericolosità geologica, sottosuolo di aree urbane. (TA.P05.025.003) (Modulo)
• Institute of environmental geology and geoengineering (IGAG) (Istituto)
• Tettonica attiva e geomorfologia (TA.P05.009.004) (Modulo)

Autore CNR

• DARIO TEDESCO (Persona)
• LUIGI PICCARDI (Unità di personale interno)
• GIOVANNA MORATTI (Unità di personale interno)

Incoming links:

Prodotto

• Institute of environmental geology and geoengineering (IGAG) (Istituto)
• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Geologia del Quaternario, valutazioni di pericolosità geologica, sottosuolo di aree urbane. (TA.P05.025.003) (Modulo)
• Tettonica attiva e geomorfologia (TA.P05.009.004) (Modulo)

Autore CNR di

• LUIGI PICCARDI (Unità di personale interno)
• GIOVANNA MORATTI (Unità di personale interno)
• DARIO TEDESCO (Persona)