GEOLOGIE, PETROLOGIE ET GEOCHIMIE DU BIMAGMATISME NEOGENE DE LA TUNISIE SEPTENTRIONALE (NEFZA ET MOGOD) PDF Download

Author: NEJI.. HALLOUL
Publisher:
ISBN:
Category :
Languages : fr
Pages :

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LE VOLCANISME NEOGENE DE LA TUNISIE SEPTENTRIONALE EST UNE ASSOCIATION BIMODALE COMPRENANT DES HAWAIITES ET DES RHYODACITES. L'ETUDE VOLCANO-STRUCTURALE MONTRE : (1) L'ABSENCE DE RELATIONS SPATIALES ENTRE LES DEUX MAGMATISMES, (2) QUE LA STRUCTURE DE L'OUED BELIF EST LIEE A UN DIAPIR TRIASIQUE. LE MAGMA BASIQUE CORRESPOND A UNE SERIE ALCALINE SODIQUE SOUS-SATUREE ET DIFFERENCIEE. LA PARAGENESE MINERALE EST A O1 (FO69 A 85), PLG (AN.49 A 67), CPX (EN54-20; FS3-30;WO38-50) ET TITANOMAGNETITE. LES TENEURS ELEVEES EN ALUMINE, L'APLATISSEMENT DES SPECTES DE TERRES RARES AU NIVEAU DES HREE, LE COMPORTEMENT DES ELEMENTS DU GROUPE DU TITANE ET LES RAPPORTS ISOTOPIQUES MONTRENT QUE CES LAVES ALCALINES ONT AUSSI QUELQUES AFFINITES AVEC LE DOMAINE CALCO-ALCALIN ET QU'ELLES ONT SUBI UNE CONTAMINATION CRUSTALE. L'EVOLUTION DE CES LAVES S'ES EFFECTUEE PAR CRISTALLISATION FRACTIONNEE, PROBABLEMENT A PARTIR DE DEUX LIQUIDES PRIMAIRES DIFFERENTS. LES CARACTERES MINERALOGIQUES, GEOCHIMIQUES ET ISOTOPIQUES DES RHYODACITES MONTENT QU'ON EST EN PRESENCE DE DEUX SOUS-GROUPES PETROGENETIQUEMENT DIFFERENTS : UN GROUPE A (ANATECTIQUE) : IL CONCERNE LES LAVES A CORDIERITE ET A BIOTITE FERRIFERE (AIN DEFLAIA ET OUED ZOUARA). UN GROUPE I (INTERMEDIAIRE) : IL RASSEMBLE LES AUTRES RHYODACITES, SANS CORDIERITE ET A BIOTITE MAGNESIENNE (RAGOUB SEID ET HADDADA). L'INTERVENTION D'UN MATERIEL BASIQUE DANS LA GENESE DE CE GROUPE EST ACQUISE ET LE PROCESSUS D'ASSIMILATION-CRISTALLISATION FRACTIONNEE (ACF) EST PROPOSE. DANS LE CADRE GEODYNAMIQUE DE LA MEDITERRANEE OCCIDENTALE, CES MANIFESTATIONS ANATECTIQUES SERAIENT LIEES A DES "LAMBEAUX" DE CROUTE COINCES DANS UN CONTEXTE DE CISAILLEMENT ET DE COULISSAGE LE LONG D'ANCIENS ACCIDENTS PROFONDS, DONT UN TEMOIN SERAIT LA FRACTURE NORD-TUNISEINNE. DANS UNE AUTRE ALTERNATIVE, CE SONT LES INJECTIONS BASALTIQUES QUI ONT PROVOQUE LA FUSION DU MATERIEL CRUSTAL AVANT D'INTERAGIR AVEC LES LIQUIDES ANATE

Author: Alain Piqué
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 332

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Northwest Africa comprises a vast territory, from Morocco, Algeria, Tunisia to Mauritania, made up out of rocks which range in age from the Archaean (Early Precambrian) to the Quaternary. The book is the result of the author's extensive field studies in many parts of the covered area and a comprehensive compilation of previously published data. Alain Pique is professor of structural geology at the Universite de Bretagne occidentale, Brest (France).

Author: Société géologique de France
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 478

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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 1434

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Author: Domenico M. Doronzo
Publisher: Springer
ISBN: 3030015750
Category : Science
Languages : en
Pages : 281

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This edited volume is based on the best papers accepted for presentation during the 1st Springer Conference of the Arabian Journal of Geosciences (CAJG-1), Tunisia 2018. The book is of interest to all researchers in the fields of Mineralogy, Geochemistry, Petrology and Volcanology. The Earth's interior is a source of heat, which makes our planet unique. This source regulates the formation and evolution of rocks at larger scales, and of minerals and sediments toward smaller scales. In such context, the exploration of georesources (products) has to be related to petrogenesis (processes). This volume offers an overview of the state-of-the-art petrogenesis and exploration in, but not limited to, the Middle East and Mediterranean regions. It gives new insights into processes and products related to the Earth's interior, and associated georesources by international researchers. Main topics include: 1. Petrogenetic processes: geochemistry, geochronology and geophysical approaches 2. Surficial processes: sedimentation and facies analysis 3. Applied mineralogy and tectonics 4. Geological research applied to mineral deposits

Author: Mohammed Bouabdellah
Publisher: Springer
ISBN: 3319317334
Category : Science
Languages : en
Pages : 585

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This volume presents an exhaustive overview of major orebodies and mineral deposits of North Africa. It is intended both for academic researchers and especially for exploration geologists interested in mineral exploration in the northern part of the African continent. Recent changes in the mining laws of most countries in this region have encouraged international mining companies to invest in local mineral industries. Accordingly, this volume will be very useful for these professionals, as well as for researchers in the field of economic geology.

Author: Alekseĭ Aleksandrovich Beus
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 312

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Author: Charles N. Alpers
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501508660
Category : Science
Languages : en
Pages : 624

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Volume 40 of Reviews in Mineralogy and Geochemistry compiles and synthesizes current information on sulfate minerals from a variety of perspectives, including crystallography, geochemical properties, geological environments of formation, thermodynamic stability relations, kinetics of formation and dissolution, and environmental aspects. The first two chapters cover crystallography (Chapter 1) and spectroscopy (Chapter 2). Environments with alkali and alkaline earth sulfates are described in the next three chapters, on evaporites (Chapter 3), barite-celestine deposits (Chapter 4), and the kinetics of precipitation and dissolution of gypsum, barite, and celestine (Chapter 5). Acidic environments are the theme for the next four chapters, which cover soluble metal salts from sulfide oxidation (Chapter 6), iron and aluminum hydroxysulfates (Chapter 7), jarosites in hydrometallugy (Chapter 8), and alunite-jarosite crystallography, thermodynamics, and geochronology (Chapter 9). The next two chapters discuss thermodynamic modeling of sulfate systems from the perspectives of predicting sulfate-mineral solubilities in waters covering a wide range in composition and concentration (Chapter 10) and predicting interactions between sulfate solid solutions and aqueous solutions (Chapter 11). The concluding chapter on stable-isotope systematics (Chapter 12) discusses the utility of sulfate minerals in understanding the geological and geochemical processes in both high- and low-temperature environments, and in unraveling the past evolution of natural systems through paleoclimate studies. The review chapters in this volume were the basis for a short course on sulfate minerals sponsored by the Mineralogical Society of America (MSA) November 11-12, 2000 in Tahoe City, California, prior to the Annual Meeting of MSA, the Geological Society of America, and other associated societies in nearby Reno, Nevada. The conveners of the course (and editors of this volume of Reviews in Mineralogy and Geochemistry), Alpers, John Jambor, and Kirk Nordstrom, also organized related topical sessions at the GSA meeting on sulfate minerals in both hydrothermal and low-temperature environments.

Author: Murthy A. Vairavamurthy
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 596

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Offers a comprehensive discussion of the geochemistry of sedimentary sulfur, including low temperature transformation in early diagenesis, thermal reactions occurring during later diagenesis and catagenesis. Provides a detailed examination of sulfur-organic matter interactions. Presents an interdisciplinary overview of recent research in the complex process of sedimentary sulfur transformations. Includes contributions from internationally recognized experts in the field.

Author: Wilson L. Orr
Publisher:
ISBN:
Category : Language Arts & Disciplines
Languages : en
Pages : 728

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Here is the first volume to examine sulfur in fossil fuels from a geochemical perspective. It begins with six introductory chapters that present an overview of the material, historical background, and summaries of the present state of knowledge. Subsequent chapters cover: case studies of specific sedimentary environments; characterization of sulfur in selected coals and petroleums by various methods and techniques; and the major advances in understanding geochemistry at the molecular level. This important volume fills a significant gap in the technical literature and updates the understanding of the chemical processes in geological environments giving rise to sulfur fossil fuels.