Relevant bibliographies by topics / Magmatisme – Islande

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Academic literature on the topic 'Magmatisme – Islande'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Magmatisme – Islande"

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Widana, Kurnia Setiawan, and Bambang Priadi. "Karakteristik Unsur Jejak Dalam Diskriminasi Magmatisme Granitoid Pulau Bangka." EKSPLORIUM 36, no. 1 (May 30, 2015): 1. http://dx.doi.org/10.17146/eksplorium.2015.36.1.2766.

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Geologi Pulau Bangka disusun oleh variasi granit sebagai Granitoid Klabat yang tersebar di berbagai lokasi. Unsur jejak dapat diaplikasikan dalam diskriminasi magmatisme dalam pembentukan granitoid tersebut. Tujuan penelitian ini adalah mengetahui karakteristik granitoid yang tersebar di Pulau Bangka berdasarkan geokimia unsur jejak untuk diaplikasikan dalam mempelajari magmatisme, sumber dan situasi tektoniknya.Metode analisis geokimia yang diaplikasikan dengan menggunakan Analisis Aktivasi Neutron (AAN) dan portableX-Ray Fluorescence (pXRF) untuk analisis kualitatif dan kuantitatif pada 27 sampel dari Granitoid Klabat di Pulau Bangka.Hasil penelitian ini menyimpulkan Granitoid Bangka Utara (Belinyu) dan Bangka Tengah sebagai percampuran kerak-mantel dengan afinitas Calc-Alkaline, karakteristik Tipe I sedangkan Granitoid Bangka Selatan dan Barat asal kerak dengan afinitas High-KCalc-Alkaline sebagai Tipe S. Diharapkan diskrimasi magmatisme granitoid bermanfaat dalam memberikan panduan eksplorasi bahan galian nuklir di Pulau Bangka. Geology of Bangka Island consists by variation of granite as Klabat Granitoid scattered in various locations. Trace elements can be applied in magmatism discrimination of granitoid.The purpose of this study was to determine the characteristics Bangka Island granitoid based on trace element geochemistry to be applied in the study of magmatism, source and tectonic situation. Geochemical analyses method used are the Neutron Activation Analysis (NAA) and portableX-Ray Fluorescence (pXRF) for qualitative and quantitative analyses on 27 samples of Klabat granitoid on Bangka Island. This study concluded granitoid East Bangka (Belinyu) and Central Bangka as crust-mantle mixing with affinityCalc-Alkaline, characteristic of I Type while South and West Bangka granitoid crust origin with affinity high K Calc-Alkaline as S Type. Expectedmagmatismdiscrimination ofgranitoidhelpfulin providingradioactive mineral explorationguidein BangkaIsland.
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Kuzmichev, A. B., and A. E. Goldyrev. "Permian-Triassic trap magmatism in Bel'kov Island (New Siberian Islands)." Russian Geology and Geophysics 48, no. 2 (February 2007): 167–76. http://dx.doi.org/10.1016/j.rgg.2007.02.002.

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Obst, Karsten. "Permo-Carboniferous dyke magmatism on the Danish island Bornholm." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 218, no. 1-2 (October 1, 2000): 243–66. http://dx.doi.org/10.1127/njgpa/218/2000/243.

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Riley, T. R., M. J. Flowerdew, R. J. Pankhurst, P. T. Leat, I. L. Millar, C. M. Fanning, and M. J. Whitehouse. "A revised geochronology of Thurston Island, West Antarctica, and correlations along the proto-Pacific margin of Gondwana." Antarctic Science 29, no. 1 (August 30, 2016): 47–60. http://dx.doi.org/10.1017/s0954102016000341.

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AbstractThe continental margin of Gondwana preserves a record of long-lived magmatism from the Andean Cordillera to Australia. The crustal blocks of West Antarctica form part of this margin, with Palaeozoic–Mesozoic magmatism particularly well preserved in the Antarctic Peninsula and Marie Byrd Land. Magmatic events on the intervening Thurston Island crustal block are poorly defined, which has hindered accurate correlations along the margin. Six samples are dated here using U-Pb geochronology and cover the geological history on Thurston Island. The basement gneisses from Morgan Inlet have a protolith age of 349±2 Ma and correlate closely with the Devonian–Carboniferous magmatism of Marie Byrd Land and New Zealand. Triassic (240–220 Ma) magmatism is identified at two sites on Thurston Island, with Hf isotopes indicating magma extraction from Mesoproterozoic-age lower crust. Several sites on Thurston Island preserve rhyolitic tuffs that have been dated at 182 Ma and are likely to correlate with the successions in the Antarctic Peninsula, particularly given the pre-break-up position of the Thurston Island crustal block. Silicic volcanism was widespread in Patagonia and the Antarctic Peninsula at ~ 183 Ma forming the extensive Chon Aike Province. The most extensive episode of magmatism along the active margin took place during the mid-Cretaceous. This Cordillera ‘flare-up’ event of the Gondwana margin is also developed on Thurston Island with granitoid magmatism dated in the interval 110–100 Ma.
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Di Bella, Marcella, Selma Russo, Maurizio Petrelli, and Angelo Peccerillo. "Origin and evolution of the Pleistocene magmatism of Linosa Island (Sicily Channel, Italy)." European Journal of Mineralogy 20, no. 4 (August 29, 2008): 587–601. http://dx.doi.org/10.1127/0935-1221/2008/0020-1832.

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Kos'ko, M., and E. Korago. "Review of geology of the New Siberian Islands between the Laptev and the East Siberian Seas, North East Russia." Stephan Mueller Special Publication Series 4 (September 17, 2009): 45–64. http://dx.doi.org/10.5194/smsps-4-45-2009.

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Abstract. The New Siberian Islands comprise De Long Islands, Anjou Islands, and Lyakhov Islands. Early Paleozoic, Mesozoic and Cenozoic sediments and igneous rocks are known on the De Long Islands. Cambrian slate, siltstone, mudstone and silicified limestone occur on Bennett Island. Ordovician volcanogenic turbidites, lavas, and small intrusions of andesite-basalt, basalt, dolerite, and porphyritic diorite were mapped on Henrietta Island. The igneous rocks are of calc-alkaline island arc series. The Ordovician age of the sequence was defined radiometrically. Early Paleozoic strata were faulted and folded presumably in the Caledonian time. Early Cretaceous sandstone and mudstone are known on Bennett Island. They are overlain by a 106–124 Ma basalt unit. Cenozoic volcanics are widespread on the De Long Islands. Zhokhov Island is an eroded stratovolcano. The volcanics are mostly of picrite-olivine type and limburgite. Radiometric dating indicates Miocene to Recent ages for Cenozoic volcanism. On the Anjou islands Lower-Middle Paleozoic strata consist of carbonates, siliciclastics, and clay. A Northwest-southeast syn-sedimentary facies zonation has been reconstructed. Upper Paleozoic strata are marine carbonate, clay and siliciclastic facies. Mudstone and clay predominate in the Triassic to Upper Jurassic section. Aptian-Albian coal bearing deposits uconformably overlap lower strata indicating Early Cretaceous tectonism. Upper Cretaceous units are mostly clay and siltstone with brown coal strata resting on Early Cretaceous weathered rhyolite. Cenozoic marine and nonmarine silisiclastics and clay rest upon the older units with a transgressive unconformity including a weathering profile in the older rocks. Manifestations of Paleozoic and Triassic mafic and Cretaceous acidic magmatism are also found on these islands. The pre-Cretaceous structure of the Anjou islands is of a block and fold type Late Cimmerian in age followed by faulting in Cenozoic time. The Lyakhov islands are located at the western end of the Late Cimmerian South Anyui suture. Sequences of variable age, composition, and structural styles are known on the Lyakhov Islands. These include an ancient metamorphic sequence, Late Paleozoic ophiolitic sequence, Late Mesozoic turbidite sequence, Cretaceous granites, and Cenozoic sediments. Fold and thrust imbricate structures have been mapped on southern Bol'shoi Lyakhov Island. North-northwestern vergent thrusts transect the Island and project offshore. Open folds of Jurassic–Early Cretaceous strata are characteristic of Stolbovoi and Malyi Lyakhov islands. Geology of the New Siberian Islands supports the concept of a circum Arctic Phanerozoic fold belt. The belt is comprised of Caledonian, Ellesmerian, Early Cimmerian and Late Cimmerian fold systems, manifested in many places on the mainland and on islands around the Arctic Ocean. Knowledge of the geology of the New Siberian Islands has been used to interpret anomalous gravity and magnetic field maps and Multi Channel Seismic (MCS) lines. Two distinguishing structural stages are universally recognized within the offshore sedimentary cover which correlate with the onshore geology of the New Siberian Islands. Dating of the upper structural stage and constituent seismic units is based on structural and stratigraphic relationships between Late Mesozoic and Cenozoic units in the archipelago. The Laptev Sea–western East Siberian Sea seismostratigraphic model for the upper structural stage has much in common with the seismostratigraphic model in the American Chukchi Sea.
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Birkenmajer, K., L. Francalanci, and A. Peccerillo. "Petrological and geochemical constraints on the genesis of Mesozoic–Cenozoic magmatism of King George Island, South Shetland Islands, Antarctica." Antarctic Science 3, no. 3 (September 1991): 293–308. http://dx.doi.org/10.1017/s0954102091000354.

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Petrological and geochemical data are reported for a series of Late Cretaceous-Middle Miocene volcanic, hypabyssal and intrusive rocks from King George Island (KGI) and from nearby Ridley Island, South Shetland Islands. Major element data indicate a calc-alkaline, basic to intermediate composition for the analysed samples. Although emplaced on a continental margin, the KGI rocks generally display low abundances of incompatible trace elements, close to those typically observed in calc-alkaline suites erupted in intraoceanic island arcs. A few samples have a significant negative Ce anomaly. Many incompatible elements define smooth positive trends on interelemental variation diagrams which suggests that magmas erupted at different times on KGI maintained a rather constant composition in terms of incompatible element ratios. Geochemical modelling, based on Sr isotope ratios and incompatible element ratios, suggests that the primary calc-alkaline magmas of KGI were all generated in an upper mantle modified by addition of small amounts of pelagic sediments dragged down by subduction processes.
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Volodkova, T. V. "Magmatism of Kunashir island (Kuril island arc) from aerogeophysical evidence." Russian Journal of Pacific Geology 1, no. 6 (December 2007): 515–36. http://dx.doi.org/10.1134/s1819714007060024.

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Sushchevskaya, N. M., A. N. Evdokimov, B. V. Belyatsky, V. A. Maslov, and D. V. Kuz’min. "Conditions of Quaternary magmatism at Spitsbergen Island." Geochemistry International 46, no. 1 (January 2008): 1–16. http://dx.doi.org/10.1134/s0016702908010011.

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Sushchevskaya, N. M., E. A. Korago, B. V. Belyatsky, and A. N. Sirotkin. "Geochemistry of Neogene magmatism at Spitsbergen Island." Geochemistry International 47, no. 10 (October 2009): 966–78. http://dx.doi.org/10.1134/s0016702909100024.

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Dissertations / Theses on the topic "Magmatisme – Islande"

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Oladottir, Bergrun Arna. "Holocene eruption history and magmatic evolution of the subglacial volcanoes, Grimsvötn, Bárdarbunga and Kverkfjöll beneath Vatnajökull, Iceland." Clermont-Ferrand 2, 2009. http://www.theses.fr/2009CLF21940.

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Dans le but d'étudier l'activité volcanique et l'évolution magmatique des volcans sous-glaciaires de Grimsvötn, Bárdarbunga et Kverkfjöll, des téphras ont été systématiquement échantillonnés au sein de profils établis dans les sols autour du glacier de Vatnajökull en Islande. La composition en éléments majeurs de 921 échantillons de téphra a été analysée par microsonde, ce qui a permis, par comparaison avec la composition chimique des différents produits émis par ces systèmes volcaniques, de déterminer leur provenance. Les nouveaux résultats indiquent 3 groupes de composition distincts, présentant chacun des variations cohérentes avec une évolution cotectique. Si l'identification de ces groupes améliore la distinction compositionnelle entre les produits émis par les 3 systèmes volcaniques étudiés, une légère superposition des compositions demeure néanmoins entre ces différents groupes. L'analyse in situ des teneurs en éléments traces par ICP-MS à ablation laser permet toutefois d'affiner leur distinction. Ensemble, l'analyse des teneurs en éléments majeurs et traces permet d'améliorer significativement l'identification de la provenance des téphras basaltiques holocène qui peuvent avoir des compositions en éléments majeurs similaires autour de Vatnajökull. Régionalement, les profils étudiés dans les sols sont corrélés les uns avec les autres en utilisant des niveaux de téphras marqueurs clefs, et les unités intermédiaires sont corrélées grâce à des outils stratigraphiques et à leur composition chimique. Approximativement, 70% des couches de téphras viennent de Grimsvötn, Bárdarbunga ou Kverkfjöll. La fréquence éruptive de Grimsvötn indique que c'est le système volcanique le plus actif, suivi de Bárdabunga. En revanche, Kverkfjöll présente une activité épisodique avec des périodes de repos supérieures au millier d'années. La diminution de la fréquence éruptive observée il y a 2000-5000 ans dans les 3 systèmes volcaniques, est liée à une diminution de l'activité volcanique et non à des facteurs environnementaux. Pendant la préhistoire, une différence d'âge de 1000-3000 ans a été observée entre les pics d'activité à l'aplomb du panache mantellique (Grimsvötn et Bardarbunga) et les pics d'activité des volcans localisés au sud-ouest, dans la partie hors-rift de la Zone Volcanique Est (ZVE ; e. G. Kalta). Ceci suggère qu'une importante augmentation de l'activité volcanique dans cette partie du ZVE est attendue dans un futur proche car la fréquence éruptive maximum a été observée il y a 1000-2000 ans à Grimsvötn et Bárdarbung. L'évolution magmatique des 3 systèmes volcaniques étudiés est contrôlée par les processus de cristallisation fractionnée et de contamination crustale. Les teneurs en éléments traces indiquent des minéralogies similaires dans les différentes sources magmatiques sous les 3 volcans. Ceci permet alors d'accéder aux conditions relatives de fusion partielle du manteau source : Bárdarbunga à l'aplomb du centre du panache mantellique islandais produit des basaltes issus de plus forts degrés de fusion alors que les plus faibles degrés de fusion sont atteints sous Kverkfjöll, plus loin du centre du panache. Une source magmatique profonde semble avoir joué un rôle important dans l'activité de Grimsvötn et Bárdarbunga, avec un système de sills et dykes plus actif sous le système volcanique de Grimsvötn pendant la période de plus forte fréquence éruptive. Ce système a évolué en chambre magmatique il y a environ 1000 ans, ce qui explique les plus faibles fréquences éruptives observées à cette période. Un lien direct semble lié la fréquence éruptive à l'architecture de la chambre magmatique. Les variations de composition des basaltes issus de Grimsvötn et Bárdarbunga sont consistantes avec la présence d'une chambre magmatique active en profondeur
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Hémond, Christophe. "Géochimie isotopique du thorium et du strontium dans la série tholéiitique d'Islande et dans des séries calco-alcalines diverses." Paris 7, 1986. http://www.theses.fr/1986PA077229.

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Martin, Erwan. "Etude géochimique des magmas acides d'Islande : mode de genèse, implications sur l'évolution géodynamique islandaise et sur la formation de la proto-croûte continentale." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2006. http://tel.archives-ouvertes.fr/tel-00717368.

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L'approche principalement géochimique menée (éléments majeurs et en trace, 87Sr/86Sr, 143Nd/144Nd, etdelta 18O) a montré que : tout au long de l'histoire de l'Islande, le gradiant géothermique résultant de l'interaction ride-panache mantellique favorise la genèse des magmas acide par fusion partielle de la croûte métabasaltique au centre de l'île et par cristallisation fractionnée en périphérie. En se basant sur le point précédent et des échantillons datés, un modèle d'évolution géodynamique de l'Islande a pu être établit afin de rendre compte de la largeur anormalement élevée de l'île. La comparaison des roches acides (roches "continentales") émises en Islande, à Hawaï et à Kerguelen, avec celles de la croûte continentale primitive (TTG) a montré que les plateaux océaniques n'ont pas été un environnement favorable lors de la genèse de la croûte primitive.
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Pedrazzi, Dario. "Hydrmagmatic monogenetic volcanism in continental and oceanic island enronments." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/229382.

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Monogenetic volcanism is characterized by a large diversity of eruptive styles, morphologies and deposits. Monogenetic landforms are the result of a complex merging of internal (magma composition, vesiculation) and external (geological setting, fracturation, hydrogeology, substrate stratigraphy, etc) parameters that govern the physics of the eruptions. Changes in these parameters may cause variations in the eruption style several times during the course of such short-lived volcanoes. Monogenetic volcanoes may form in any type of geological environment with scoria cones being the most common volcano type and hydrovolcanic tuff rings, tuff cones, and maars as the second in abundance. These small-volume volcanoes are generally the result of short-lived eruptions but the activity in a monogenetic volcanic field might exceed the total life of composite volcanoes. The attention of this work was focused on the relation between monogenetic volcanic landforms and the external variables that influenced the dynamics of the eruptions (i.e. magmatism vs phreatomagmatism) through a multidisciplinary perspective, in marine and continental geological settings under which monogenetic volcanism may develop. Different case studies representative of this type of activity and of these different environments have been considered. The first one corresponds to the La Crosa De Sant Dalmai volcano (Garrotxa Volcanic Field, southern sector of the Catalan Volcanic Zone), a roughly circular asymmetrical maar-diatreme volcano, which is one of the most characteristic volcanic edifices of this continental monogenetic volcanic field and the largest Quaternary volcanic crater on the Iberian Peninsula. This edifice is an example of monogenetic landform, mostly composed of phreatomagmatic deposits with subordinate Strombolian phases, constructed on a mixed basement made of hard Paleozoic granites and schists rocks and soft Plio-Quaternary deposits. Here, I reconstructed the hydrogeological conditions of the substrate and the implication for the eruptive dynamics. As a second case study, I carried out detailed stratigraphic and sedimentological studies of the succession of El Golfo tuff cone (Lanzarote, Canary Islands). The main objective of the work was to describe in detail the structure and association of facies of this edifice and use this information to infer changes in eruption style and depositional processes. Another type of eruption was studied in the same archipelago at El Hierro, an island essentially characterized by basaltic volcanism with both Strombolian and Hawaiian activity. Here I reported the stratigraphic, lithological, sedimentological and petrographic characteristics of a felsic hydrovolcanic episode in order to discuss, transport/depositional mechanisms, dynamics, relative age and implications for hazard assessment on the island. Finally, the same type of methodology was applied at Deception Island (Southern Shetland Archipelago, Antarctica), determining the lithological and sedimentological characteristics, and clasts distribution (isopach and isopleth maps) of the eruption of 1970. This information was, then, used to determine depositional processes, eruption style and physical parameters (i.e. plume height, erupted volume, VEI) of the eruption in order to compare this episode with the previous 1967 episode, and to deduce their implications to conduct hazard assessment at the island. Each work represents a diverse aspect of hydrovolcanism and the results obtained helped to better understand the eruptive behavior of this type of volcanoes, which is a fundamental task in order to understand the possible future hazards associated with this type of volcanism. The results obtained can be applied to monogenetic volcanic fields worldwide and are, therefore, useful to reconstruct the evolution of a certain volcanic fields, through the study of single monogenetic volcanoes, and to evaluate the possible volcanic hazards, as similar eruptions represent a serious threat, which is often underestimated. A more systematic study is, thus, needed in order to understand the role of shallow-level conditions in the formation of specific volcano types in such complex volcanic fields.
El vulcanismo monogenético se caracteriza por una gran diversidad de estilos eruptivos, morfologías y depósitos. Los tipos de edificios que se forman son el resultado de una compleja combinación de parámetros que rigen la física de la erupción. La atención de este trabajo se centra en la relación entre los edificios volcánicos monogenéticos y las variables externas que influyen en la dinámica de las erupciones (es decir, magmatismo vs freatomagmatismo) a través de un punto de vista multidisciplinar, en ambientes continentales y marinos en los que el vulcanismo puede desarrollar. Diferentes estudios, representativos de este tipo de actividad en diferentes entornos geográficos y geológicos, se han llevado a cabo. El primer ejemplo corresponde al volcán de La Crosa de Sant Dalmai (Campo Volcánico de La Garrotxa) donde se han reconstruido las condiciones hidrogeológicas del sustrato y la implicación para la dinámica eruptiva. Como segundo caso de estudio, se ha realizado una estratigrafía de detalle del cono de toba de El Golfo (Lanzarote, Islas Canarias), donde se han estudiado los mecanismos de emplazamiento de los depósitos para inferir cambios en la interacción magma/agua. Otro tipo de erupción se ha investigado en el mismo archipiélago, en la Isla de El Hierro, determinando las características físicas de un episodio félsico de origen hidrovolcánico ocurrido en una isla que se caracteriza esencialmente por el vulcanismo basáltico tanto Estromboliano como Hawaiiano. Por último, este mismo tipo de metodología se ha aplicado a la Isla Decepción (archipiélago de las Shetland del Sur, Antártida), estableciendo los parámetros físicos de la erupción del 1970 con el fin de comparar este episodio con el evento anterior del 1967, y deducir sus consecuencias para llevar a cabo la evaluación de peligrosidad en la isla. Los resultados obtenidos pueden ser aplicados a campos volcánicos monogenéticos en todo el mundo y, por tanto, son útiles para reconstruir la evolución de ciertos campos volcánicos, a través del estudio de volcanes monogenéticos individuales, para evaluar los posibles riesgos volcánicos, teniendo en cuenta como erupciones similares representan una grave amenaza, que es a menudo subestimada.
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Kamenov, George Dimitrov. "Magmatism and ore deposit formation in SW Pacific Island arcs." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008250.

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Albert, Mínguez Helena. "Processes, time scales and unrest of monogenetic volcanism." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/334689.

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Seismic, deformation, and gas activity (unrest) typically precedes volcanic eruptions. Successful volcanic event forecasting depends on the quality of the surveillance network for detecting any changes in volcano behaviour. To interpret the geochemical and geophysical precursors correctly it is important to understand the volcanic processes that occur prior and during volcanic eruptions. Detailed knowledge of the volcano internal structure, the rheology of the magmas, the time scales of the processes occurring at depth and the characteristics of past unrest episodes, must be combined with an adequate monitoring network to improve the volcanic hazard forecast. However, these aspects have received little attention in monogenetic volcanoes. The aim of my PhD Thesis is to improve our understanding on monogenetic volcanism, its causes and dynamics, and to help anticipating the volcanic activity. I have focused on three main aspects of this problem. The first one is the calculation of the rheological properties of magmas during mixing. The second aspect I have addressed are the processes and time scales that lead to monogenetic eruptions with the aim to better interpret volcanic unrest and improve eruption forecasts. Finally, I have investigated the seismic unrest periods of historical monogenetic eruptions from a compilation of historical accounts worldwide. The results provide a conceptual framework for better anticipating monogenetic eruptions and should lead to improved strategies for mitigation of their associated hazards and risks.
Las erupciones volcánicas están generalmente precedidas por la actividad sísmica, la deformación y la desgasificación (unrest). El éxito en la predicción del evento volcánico depende de la calidad de la red de vigilancia para detectar cualquier cambio en el comportamiento del volcán. Para interpretar los precursores geoquímicos y geofísicos correctamente es importante entender los procesos volcánicos que ocurren antes y durante las erupciones volcánicas. El conocimiento en detalle de la estructura interna del volcán, la reología de los magmas, las escalas de tiempo de los procesos que ocurren en profundidad y las características de los episodios pasados de unrest, debe combinarse con una red de vigilancia adecuada para mejorar el pronóstico de los eventos volcánicos. Sin embargo, estos aspectos han recibido poca atención en los volcanes monogenéticos. El objetivo de mi tesis doctoral es mejorar nuestra comprensión sobre el vulcanismo monogenético, sus causas y su dinámica, con el objetivo de mejorar la posibilidad de anticiparse a la actividad volcánica. Me he centrado en tres aspectos principales de este problema. El primero es el cálculo de las propiedades reológicas de los magmas durante los eventos de mezcla. El segundo aspecto es el estudio de los procesos, junto con sus escalas temporales, que llevan a erupciones monogenéticas con el fin de interpretar mejor la actividad volcánica y mejorar los pronósticos de una erupción. Por último, he investigado los períodos de unrest sísmico de erupciones monogenéticas históricas en todo el mundo mediante una compilación de documentos históricos. Los resultados proporcionan un marco conceptual que permite mejorar la predicción de erupciones monogenéticas y deberían conducir a mejores estrategias para mitigar sus peligros y riesgos asociados.
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Saunders, Katharine Emma. "Micro-analytical studies of the petrogenesis of silicic arc magmas in the Taupo Volcanic Zone and southern Kermadec Arc, New Zealand : a thesis submitted to the Victoria University of Wellington in fulfilment of the requirements for the degree of Doctor of Philosophy in Geology /." ResearchArchive@Victoria e-Thesis, 2009. http://hdl.handle.net/10063/943.

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Turnbull, Rose Elizabeth. "Mafic-Felsic interaction in a high level magma chamber - The Halfmoon Pluton, Stewart Island, New Zealand: Implications for understanding arc magmatism." Thesis, University of Canterbury. Geological Sciences, 2009. http://hdl.handle.net/10092/3503.

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Field evidence from exposed plutonic rocks indicates that mafic-felsic magma interaction is an important process during the construction and evolution of magma chambers. The exhumed, ~140 Ma, Halfmoon Pluton of Stewart Island, New Zealand is characterized by a sequence of mingled mafic sheets and enclaves preserved within an intermediate-felsic host, and provides a unique opportunity to directly investigate the physico-chemical processes that operate within an arc setting. Interpretation of mingling structures and textures in the field, in combination with extensive petrographic, geochemical and geochronological data, allow for conclusions to be reached regarding the nature of the mafic-felsic magma interactions, and the physical, chemical and thermal processes responsible for the generation and evolution of the calc-alkaline magmas. Detailed documentation and interpretation of mafic-felsic magma mingling structures and textures reveal that the Halfmoon Pluton formed incrementally as the result of episodic replenishments of mafic magma emplaced onto the floor of an aggrading intermediate-felsic magma chamber. Physico-chemical processes identified include fractional crystallization and accumulation of a plagioclase – hornblende – apatite – zircon mineral assemblage, episodic replenishment by hot, wet basaltic magmas, magmatic flow and compaction. Early amphibole and apatite crystallization played an important role in the compositional diversity within the Halfmoon Pluton. Variations in the style of magma mingling preserved within the magmatic “stratigraphy” indicate that processes operating within the chamber varied in space and time. Variations in mineral zoning and composition within hornblende indicate that the Halfmoon Pluton crystallized within a magma in which melt composition fluctuated in response to repeated mafic magma replenishments, fractionation, crystal settling and convection. Mineral assemblages, chemical characteristics, isotopic data and geochronological evidence indicate that the amphibole-rich calc-alkaline Halfmoon Pluton was emplaced into a juvenile arc setting, most probably an island-arc. Data are consistent with a model whereby ‘wet’ amphibole-rich basaltic magmas pond at the crust-mantle interface and episodically rise, inject and mingle with an overlying intermediate-felsic magma chamber that itself represents the fractionated product of the mantle melts.
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Henriot, Olivier. "La déformation actuelle au nord de l'Islande, à la jonction entre un rift et une transformante : mesure par InSAR et modélisation d'un système volcano-tectonique actif." Chambéry, 2003. http://www.theses.fr/2003CHAMS018.

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Ce travail consiste en une étude de déformation portant sur le Nord de l'Islande, en employant la méthode InSAR DIAPASON, sur la période post-rifting (92-02) qui fait suite à l'épisode de rifting majeur de Krafla (75-94). Deux types de signaux ont été identifiés : - un signal local, autour du volcan Krafla, affectant une zone de 10 x 30 km, et marqué par un mouvement essentiellement subsidant de vitesse constante (3 cm. An-1 au maximum). Ce signal posséderait une source peu profonde (entre 6 et 3 km) composée d'une chambre magmatique prolongée au Nord et au Sud par des sills. - un signal régional affectant l'ensemble de la zone étudiée (100 x 10 km) révélé au premier ordre dans les interférogrammes radar par des franges parallèles en direction N20ʿE. Le nombre de franges augmente linéairement avec le temps. Celles ci pourraient correspondre à des vitesses de déplacement avec composante horizontale et verticale, dont les modèles de croûte purement élastique ne peuvent rendre compte
This work consists of a study of North Iceland using the DIAPASON InSAR method over the 1992-2002 post-rifting period which immediately follows the Krafla 1975-1984 major rifting episode. Two types of signal have been identified : - A local signal, around Krafla volcano, affecting a 10 x 30 km area, essentially marked by a vertical subsidence signal at a constant rate (3 cm/y maximum). The signal source appears to be shallow (3 to 6 km depth) and made up of a magma chamber prolonged north and south by sills. - A regional signal affecting the whole of the studied area (100 x 10 km) revealed to the first order by parallel N 20ʿE fringes in the interferograms. The number of fringes increases linearly with time. This signal may represent displacements with both horizontal and vertical components which purely elastic crust models cannot properly account for
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McCarron, Joseph John. "Evolution and tectonic implications of late Cretaceous - early Tertiary fore-arc magmatism : Alexander Island, Antarctica." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389878.

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Books on the topic "Magmatisme – Islande"

1

Magmatizm i geodinamika Komandorsko-Aleutskoĭ ostrovnoĭ dugi. Moskva: "Nauka", 1990.

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A, T͡S︡vetkov A., and Dmitriev I͡U︡riĭ Ivanovich, eds. Magmaticheskai͡a︡ ėvoli͡u︡t͡s︡ii͡a︡ ostrovnykh dug. Moskva: "Nauka", 1988.

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Greiling, Reinhard, and Helga De Wall. Magmatic evolution of a neoproterozoic island-arc: Syn- to post-orogenic igneous activity in the Anti-Atlas (Morocco). Jülich: Forschungszentrum Jülich, Central Library, 2001.

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Currie, K. L. Relations between metamorphism and magmatism near Cheticamp, Cape Breton Island, Nova Scotia. [Ottawa]: Energy, Mines and Resources Canada, 1987.

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Canada, Geological Survey of. Relations Between Metamorphism and Magmatism Near Cheticamp, Cape Breton Island, Nova Scotia. S.l: s.n, 1985.

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Ford, Arthur B. The Sitkoh Bay alkalic plutonic suite: Silurian or older alkalic magmatism on eastern Chichagof Island, southeastern Alaska. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1990.

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Yanagi, Takeru. Arc Volcano of Japan: Generation of Continental Crust from the Mantle. Tokyo: Springer-Verlag Berlin Heidelberg, 2011.

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The Sitkoh Bay alkalic plutonic suite: Silurian or older alkalic magmatism on eastern Chichagof Island, southeastern Alaska. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1990.

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Yanagi, Takeru. Arc Volcano of Japan: Generation of Continental Crust from the Mantle. Springer, 2016.

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Yanagi, Takeru. Arc Volcano of Japan: Generation of Continental Crust from the Mantle. Springer, 2011.

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Book chapters on the topic "Magmatisme – Islande"

1

Araña, V., and R. Ortiz. "The Canary Islands: Tectonics, Magmatism and Geodynamic Framework." In Magmatism in Extensional Structural Settings, 209–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-73966-8_9.

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Pirajno, Franco. "Oceanic Islands, Large Igneous Provinces, Mafic Dyke Swarms, and Intracontinental Alkaline Magmatism." In Ore Deposits and Mantle Plumes, 111–214. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-2502-6_3.

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Sheppard, Simon M. F. "Chapter 10. IGNEOUS ROCKS: III. ISOTOPIC CASE STUDIES of MAGMATISM in AFRICA, EURASIA and OCEANIC ISLANDS." In Stable Isotopes in High Temperature Geological Processes, edited by John W. Valley, Hugh P. Taylor, and James R. O’Neil, 319–72. Berlin, Boston: De Gruyter, 1986. http://dx.doi.org/10.1515/9781501508936-015.

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Konopelko, Dmitry L. "Chapter 4. Paleozoic granitoid magmatism of South and Middle Tien Shan in Uzbekistan." In PALEOZOIC GRANITOID MAGMATISM OF WESTERN TIEN SHAN, 102–63. St. Petersburg State University, 2020. http://dx.doi.org/10.21638/11701/9785288060250.05.

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The Paleozoic evolution of the Southern and Middle Tien Shan terranes is generally associated with the history of two ocean basins - the Turkestan and Paleotethys. Ages of ophiolites indicate the opening of the oceans in Cambrian – Ordovician, and partial closure with formation of an island arc in the northern part of the basin in Ordovician - Silurian. At the northern margin of the Turkestan ocean, the northward subduction under the Middle Tien Shan continued until Devonian, which led to formation of an active margin with granitoids emplaced between 429 and 416 Ma. In the late Devonian, subduction-related magmatism terminated and the whole region developed as passive margin. Northward subduction resumed in the early Carboniferous and formed magmatic Andean-type belt exposed in the Chatkal-Kurama terrane. Late Carboniferous collision resulted in crust thickening and emplacement of postcollisional granitoids. Formation of postcollisional intrusions in different terranes took place in various tectonic settings. Shoshonitic granitoids of the Chatkal-Kurama terrane formed as a result of slab break off at postcollisional stage. Voluminous postcollisional magmatism of Kyzylkum can be explained by delamination of lower crust and its replacement by the material of astenospheric mantle. Coeval emplacement of geochemically contrasting granitoids in the North Nuratau fault zone could result from contemporaneous melting of different protoliths at different depths in a translithospheric shear zone.
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Vlahou, Maria, Georgios Christofides, Georgios Eleftheriadis, Laura Pinarelli, and Antonios Koroneos. "Tertiary volcanic rocks from Samothraki island (north Aegean, Greece): Sr and Nd isotope constraints on their evolution." In Postcollisional Tectonics and Magmatism in the Mediterranean Region and Asia. Geological Society of America, 2006. http://dx.doi.org/10.1130/2006.2409(15).

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Apen, Francisco E., John Wakabayashi, Howard W. Day, Sarah M. Roeske, A. Kate Souders, and Trevor A. Dumitru. "Regional-scale correlations of accreted units in the Franciscan Complex, California, USA: A record of long-lived, episodic subduction accretion." In Plate Tectonics, Ophiolites, and Societal Significance of Geology: A Celebration of the Career of Eldridge Moores. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.2552(11).

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ABSTRACT The Franciscan Complex of California, the type example of an exhumed accretionary complex, records a protracted history of voluminous subduction accretion along the western margin of North America. Recent geochronological work has improved our knowledge of the timing of accretion, but the details of the accretionary history are disputed, in part, due to uncertainties in regional-scale correlations of different units. We present new detrital zircon U-Pb ages from two sites on opposite sides of San Francisco Bay in central California that confirm previously proposed correlations. Both sites are characterized by a structurally higher blueschist-facies unit (Angel Island unit) underlain by a prehnite-pumpellyite-facies unit (Alcatraz unit). The Angel Island unit yields maximum depositional ages (MDAs) ranging from 112 ± 1 Ma to 114 ± 1 Ma (±2σ), and the Alcatraz unit yields MDAs between 94 ± 2 Ma and 99 ± 1 Ma. Restoration of post-subduction dextral displacement suggests these sites were originally 44–78 km apart and much closer to other Franciscan units that are now exposed farther south in the Diablo Range. Comparison with detrital zircon dates from the Diablo Range supports correlations of the Bay Area units with certain units in the Diablo Range. In contrast, correlations with Franciscan units in the northern Coast Ranges of California are not robust: some units are clearly older than those in the Bay Area whereas others exhibit distinct differences in provenance. Integration of age data from throughout the Franciscan Complex indicates long-lived and episodic accretion from the Early Cretaceous to Paleogene. Although minor, sporadic accretion began earlier, significant accretion occurred during the interval 123–80 Ma and was followed by minor accretion at ca. 53–49 Ma. Periods of accretion and nonaccretion were associated with arc magmatism in the Sierra Nevada–Klamath region, cessation of arc activity, and reorganization of paleodrainage systems, which implicates plate dynamics and sediment availability as major controls on the development of the Franciscan Complex.
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Varne, Rick, Anthony V. Brown, and Trevor Falloon. "Macquarie Island: Its geology, structural history, and the timing and tectonic setting of its N-MORB to E-MORB magmatism." In Ophiolites and oceanic crust: new insights from field studies and the Ocean Drilling Program. Geological Society of America, 2000. http://dx.doi.org/10.1130/0-8137-2349-3.301.

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Estrada, Solveig, and Karsten Piepjohn. "Early Cretaceous magmatism and post-Early Cretaceous deformation on Ellef Ringnes Island, Canadian High Arctic, related to the formation of the Arctic Ocean." In Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens. Geological Society of America, 2019. http://dx.doi.org/10.1130/2018.2541(15).

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Conference papers on the topic "Magmatisme – Islande"

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Pease, Victoria, and Charlotte Fredriksson. "IMPLICATIONS FOR LOWER JURASSIC ISLAND ARC MAGMATISM FROM IGNEOUS CLASTS IN THE LOWER CRETACEOUS CONGLOMERATE, NE YUKON-KOYUKUK BASIN, ALASKA." In 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329239.

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White, Chris E., Sandra M. Barr, Deanne van Rooyen, Jonathan M. Shute, Travis McCarron, and Gabriel Sombini dos Santos. "HOW GEOLOGICAL MAPPING, PETROLOGICAL STUDIES, AND U-PB (ZIRCON) DATING LED TO RECOGNITION OF SEPARATE NEOPROTEROZOIC, CAMBRIAN, ORDOVICIAN, AND SILURIAN CONVERGENT MARGIN MAGMATISM IN WESTERN CAPE BRETON ISLAND, NOVA SCOTIA, CANADA." In 53rd Annual GSA Northeastern Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018ne-310665.

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Contreras-lópez, Manuel, Luis Alberto Delgado-Argote, Bodo Weber, Xochitl G. Torres-Carrillo, Dirk Frei, and Doris K. Gómez-Alvarez. "MIDDLE JURASSIC-EARLY CRETACEOUS (166-140 MA) ISLAND ARC MAGMATISM OF NW MEXICO: EVIDENCE FROM THE META-IGNEOUS ROCKS OF THE SIERRA EL ARCO AND COEVAL MAGMATIC ROCKS IN BAJA CALIFORNIA." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-355096.

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Contreras-López, Manuel, Luis Alberto Delgado-Argote, Bodo Weber, Xochitl G. Torres-Carrillo, and Doris K. Gómez-Alvarez. "PETROGENESIS AND GEOCHEMICAL CORRELATION OF THE META-IGNEOUS ROCKS OF THE SIERRA EL ARCO WITH THE CEDROS-VIZCAINO REGION, CENTRAL BAJA CALIFORNIA PENINSULA: MIDDLE JURASSIC-EARLY CRETACEOUS ISLAND ARC MAGMATISM OF NW MEXICO." In 116th Annual GSA Cordilleran Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020cd-346998.

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Reports on the topic "Magmatisme – Islande"

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Currie, K. L. Relations between metamorphism and magmatism near cheticamp, Cape Breton Island, Nova Scotia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/122370.

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Kingsbury, C. G., R. E. Ernst, and S. L. Kamo. New U-Pb ages from South Fiord, Axel Heiberg Island: implications for HALIP magmatism. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2017. http://dx.doi.org/10.4095/300705.

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Davis, W. J., C. Schröder-Adams, C. A. Evenchick, J. O. Herrle, and J. Galloway. U-Pb geochronology of bentonites from Ellef Ringnes and Axel Heiberg islands - a record of Albian to Campanian felsic magmatism in the HALIP region. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2017. http://dx.doi.org/10.4095/300704.

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