Relevant bibliographies by topics / Jurassic Arc

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Academic literature on the topic 'Jurassic Arc'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Jurassic Arc"

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Petersen, Nathan T., Paul L. Smith, James K. Mortensen, Robert A. Creaser, and Howard W. Tipper. "Provenance of Jurassic sedimentary rocks of south-central Quesnellia, British Columbia: implications for paleogeography." Canadian Journal of Earth Sciences 41, no. 1 (January 1, 2004): 103–25. http://dx.doi.org/10.1139/e03-073.

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Jurassic sedimentary rocks of southern to central Quesnellia record the history of the Quesnellian magmatic arc and reflect increasing continental influence throughout the Jurassic history of the terrane. Standard petrographic point counts, geochemistry, Sm–Nd isotopes and detrital zircon geochronology, were employed to study provenance of rocks obtained from three areas of the terrane. Lower Jurassic sedimentary rocks, classified by inferred proximity to their source areas as proximal or proximal basin are derived from an arc source area. Sandstones of this age are immature. The rocks are geochemically and isotopically primitive. Detrital zircon populations, based on a limited number of analyses, have homogeneous Late Triassic or Early Jurassic ages, reflecting local derivation from Quesnellian arc sources. Middle Jurassic proximal and proximal basin sedimentary rocks show a trend toward more evolved mature sediments and evolved geochemical characteristics. The sandstones show a change to more mature grain components when compared with Lower Jurassic sedimentary rocks. There is a decrease in εNdT values of the sedimentary rocks and Proterozoic detrital zircon grains are present. This change is probably due to a combination of two factors: (1) pre-Middle Jurassic erosion of the Late Triassic – Early Jurassic arc of Quesnellia, making it a less dominant source, and (2) the increase in importance of the eastern parts of Quesnellia and the pericratonic terranes, such as Kootenay Terrane, both with characteristically more evolved isotopic values. Basin shale environments throughout the Jurassic show continental influence that is reflected in the evolved geochemistry and Sm–Nd isotopes of the sedimentary rocks. The data suggest southern Quesnellia received material from the North American continent throughout the Jurassic but that this continental influence was diluted by proximal arc sources in the rocks of proximal derivation. The presence of continent-derived material in the distal sedimentary rocks of this study suggests that southern Quesnellia is comparable to known pericratonic terranes.
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Sokolov, S. D., G. Ye Bondarenko, A. K. Khudoley, O. L. Morozov, M. V. Luchitskaya, M. I. Tuchkova, and P. W. Layer. "Tectonic reconstruction of Uda-Murgal arc and the Late Jurassic and Early Cretaceous convergent margin of Northeast Asia–Northwest Pacific." Stephan Mueller Special Publication Series 4 (September 17, 2009): 273–88. http://dx.doi.org/10.5194/smsps-4-273-2009.

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Abstract. A long tectonic zone composed of Upper Jurassic to Lower Cretaceous volcanic and sedimentary rocks is recognized along the Asian continent margin from the Mongol-Okhotsk fold and thrust belt on the south to the Chukotka Peninsula on the north. This belt represents the Uda-Murgal arc, which was developed along the convergent margin between Northeast Asia and Northwest Meso-Pacific. Several segments are identified in this arc based upon the volcanic and sedimentary rock assemblages, their respective compositions and basement structures. The southern and central parts of the Uda-Murgal arc were a continental margin belt with heterogeneous basement represented by metamorphic rocks of the Siberian craton, the Verkhoyansk terrigenous complex of Siberian passive margin and the Koni-Taigonos Late Paleozoic to Early Mesozoic island arc with accreted oceanic terranes. At the present day latitude of the Pekulney and Chukotka segments there was an ensimatic island arc with relicts of the South Anyui oceanic basin in a backarc basin. Accretionary prisms of the Uda-Murgal arc and accreted terranes contain fragments of Permian, Triassic to Jurassic and Jurassic to Cretaceous (Tithonian–Valanginian) oceanic crust and Jurassic ensimatic island arcs. Paleomagnetic and faunal data show significant displacement of these oceanic complexes and the terranes of the Taigonos Peninsula were originally parts of the Izanagi oceanic plate.
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Santos Polo, Alan, Guo Weimin, Fernando Rivera, Colombo Tassinari, Luis Cerpa, and Shoji Kojima. "Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages." Andean Geology 46, no. 3 (September 30, 2019): 445. http://dx.doi.org/10.5027/andgeov46n3-3041.

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Early Jurassic arc-related igneous rocks host porphyry copper prospects and gold-bearing quartz vein deposits in southern Peru. Ten new zircon U-Pb ages for wall rocks of gold-bearing quartz veins, Jurassic rocks and copper-mineralized porphyry bodies in Zafranal porphyry copper, together with published ages for Jurassic rocks, reveal a continuous magmatic evolution of the early Jurassic arc. The Jurassic rocks and gold-bearing quartz vein systems in the western flank of the Western Cordillera are hosted by Paleo- and Meso-proterozoic orthogneisses of the Arequipa Massif (1.75-1.44 Ga) that underwent Grenville-age metamorphism ~1 Ga. The early mafic magmatism is recorded between 199.6-193.2 Ma, and was followed by dominantly felsic magmatism from 184.1-174.9 Ma. Both magmatic events have formed the thinnest intrusive belt (
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Andrew, Anne, and Colin I. Godwin. "Lead- and strontium-isotope geochemistry of Paleozoic Sicker Group and Jurassic Bonanza Group volcanic rocks and Island Intrusions, Vancouver Island, British Columbia." Canadian Journal of Earth Sciences 26, no. 5 (May 1, 1989): 894–907. http://dx.doi.org/10.1139/e89-072.

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Whole-rock and galena lead-isotope analyses have been obtained from the Sicker Group Paleozoic island-arc volcanic package and from a Jurassic island-arc represented by the Bonanza Group volcanics and Island Intrusions. Galena lead-isotope analyses from the volcanogenic ore deposits at the Buttle Lake mining camp in the Sicker Group provide estimates of the initial lead ratios for the Sicker Group. Lead-isotope signatures are uniform within each of the major orebodies, but the Myra orebody is less radiogenic than the older H–W orebody. This has major significance in terms of ore genesis for these important deposits.There are significant differences in isotopic composition between the Sicker Group and Devonian island-arc type rocks in the Shasta district, California, which rules out direct correlations between the rock units of these two areas. Relatively high initial values of 207Pb/204Pb (> 15.56) and 208Pb/204Pb (> 38.00) suggest that large quantities of crustal lead must have been involved in the formation of the Sicker Group volcanic rocks. Thus it is proposed that the trench related to the Paleozoic island arc had a substantial input of continental detritus and may have lain near a continent.The Jurassic island arc is characterized by low 207Pb/204Pb ratios (< 15.59), suggesting a more primitive arc environment than for the Paleozoic arc. Bonanza Group volcanic rocks contain lead that is less radiogenic than lead in the Island Intrusions. Present and initial lead-isotope ratios of both the Bonanza Group volcanics and Island intrusions follow the same trend, supporting the hypothesis that they are comagmatic. Lead isotopes from a galena vein within the Island Copper porphyry deposit plot with the initial ratios for Bonanza Group volcanics and Island Intrusions. This confirms the hypothesis that this mineralization is related to the Jurassic island-arc volcanic event.Initial lead-isotope ratios for the Jurassic rock suite form a linear array on both 207Pb/204Pb versus 206Pb/204Pb and 208Pb/204Pb versus 206Pb/204Pb plots. If interpreted as due to isotopic mixing, the more radiogenic end member has a composition that is lower in 207Pb/204Pb and higher in 206Pb/204Pb than typical upper continental crust. Assimilation of Sicker Group material during the emplacement of the Jurassic arc can explain the mixing trend.
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Chiaradia, Massimo, Lluís Fontboté, and Agustín Paladines. "Metal Sources in Mineral Deposits and Crustal Rocks of Ecuador (1° N–4° S): A Lead Isotope Synthesis." Economic Geology 99, no. 6 (September 1, 2004): 1085–106. http://dx.doi.org/10.2113/econgeo.99.6.1085.

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Abstract Ecuador consists of terranes having both continental (Chaucha, Tahuin, Loja terranes) and oceanic (Macuchi, Alao, Salado terranes) affinity, which were accreted to the Amazon craton from Late Jurassic to Eocene. Four main magmatic arcs were formed by the subduction of the Farallon/Nazca plate since the Jurassic: a Jurassic continental arc on the western margin of the Amazon craton, a Jurassic island arc (Alao terrane), an early Tertiary island arc (Macuchi terrane), and a middle-late Tertiary continental arc encompassing the terranes of Macuchi, Chaucha, Tahuin, Loja, and Alao after complete assembly of the Ecuadorian crust. Mineral deposits formed during these magmatic arc activities include porphyry-Cu and gold skarn deposits in association with the Jurassic continental arc, polymetallic volcanic-hosted massive sulfide deposits (VHMS) in association with the Jurassic island arc of Alao, Au-Cu-Zn VHMS deposits in association with the early Tertiary island arc of Macuchi, and porphyry-Cu and precious-metal epithermal deposits in association with the middle-late Tertiary continental-arc magmatism on the newly assembled crust of Ecuador (Macuchi, Chaucha, Tahuin, Loja, and Alao terranes). In this study, we have compiled 148 new and 125 previously published lead isotope analyses on Paleozoic to Miocene metamorphic, intrusive, volcanic, and volcanosedimentary rocks, as well as on Jurassic to Miocene magmatic-related ore deposits of Ecuador. Lead isotope compositions of the magmatic rocks of the four main arc events derive from mixing of various sources including mantle, variably enriched by pelagic sediments and/or by a high 238U/204Pb component, and heterogeneous continental crust rocks. Lead isotope compositions of the Ecuadorian ore deposits display a broad range of values (206Pb/204Pb = 18.3–19.3, 207Pb/204Pb = 15.54–15.74, 208Pb/204Pb = 38.2–39.2), which is as large as the range previously reported for all magmatic-related ore deposits of the Central Andean provinces I and II combined. Ore deposits formed before complete assembly of the Ecuadorian crust through complete accretion of the several terranes (i.e., pre-Eocene) have lead isotope compositions overlapping those of the associated magmatic rocks, suggesting a largely magmatic origin for their lead. In contrast, post-assembly ore deposits (i.e., post-Eocene) have lead isotope compositions that only partly overlap those of the coeval magmatic rocks of the continental arc. In fact, several ore deposits have lead isotope compositions shifted toward those of the basement rocks that host them, suggesting that lead derives from a mixture of magmatic lead and basement-rock lead leached by hydrothermal fluids. Most Ecuadorian ores have high 207Pb/204Pb values (>15.55), suggesting a dominant continental crust or pelagic sediment origin of the lead. However, we caution against concluding that chalcophile metals (for example, Cu and Au) also have a continental crust origin. Ore deposits of the different terranes of Ecuador, irrespective of their age, plot in distinct isotopic fields, which are internally homogeneous. This suggests that lithologic factors had an important control on the lead isotope compositions. Ultimately, lead isotope compositions of the ore deposits of Ecuador mirror the isotopic compositions of the rocks of the host terranes and are consistent with the multiterrane nature of the Ecuadorian crust.
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PERRI, FRANCESCO. "Reconstructing chemical weathering during the Lower Mesozoic in the Western-Central Mediterranean area: a review of geochemical proxies." Geological Magazine 155, no. 4 (January 9, 2017): 944–54. http://dx.doi.org/10.1017/s0016756816001205.

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AbstractThe Triassic–Jurassic rift-valley stage of Tethyan rifting in the Western-Central Mediterranean area is characterized by a development of a puzzle of plates and microplates with the deposition of continental redbeds (in the internal domains of the Gibraltar Arc and Calabria–Peloritani Arc) that can be considered a regional lithosome. This paper aims to reconstruct the chemical weathering conditions of the Triassic–Jurassic boundary in the Western-Central Mediterranean area using the geochemical and mineralogical composition of continental redbed mudrocks of Mesozoic age. The mudrocks from the Calabria–Peloritani Arc show higher values of weathering (mobility) indices (αMg=(Al/Mg)sed/(Al/Mg)UCC;αK=(Th/K)sed/(Th/K)UCC;αBa=(Th/Ba)sed/(Th/Ba)UCC) than the Gibraltar Arc samples. Furthermore, the CIA (Chemical Index of Alteration) and MIA (Mineralogical Index of Alteration) values and the ‘Rb-type indices’ (e.g. Rb/Sr and Rb/K ratios) are higher for the Calabria–Peloritani Arc mudrocks than the Gibraltar Arc samples. All these geochemical proxies closely resemble each other and show similar variations suggesting climatic changes towards humid conditions through the Uppermost Triassic to Lowermost Jurassic that favoured chemical weathering conditions. This period is probably characterized by seasonal climate alternations corresponding to an increase in palaeoclimatic humidity. The mineralogical compositions of the Mesozoic mudrocks further confirm these indications as shown by a higher abundance of kaolinite, related to warm–humid conditions, in the Calabria–Peloritani Arc mudrocks than in those of the Gibraltar Arc.
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Zhang, Yue Qiao, Wei Hou, and Fang Zhang. "The Provenance Tectonic Background Analysis of the Upper Jurassic Mohe Basin in Northeast China." Advanced Materials Research 734-737 (August 2013): 476–79. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.476.

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The provenance tectonic background of Late Jurassic Mohe Basin was researched through the geochemical composition of sandstone. The Late Jurassic Mohe Basin is characterized by multiple provenances. One provenance is the active continental margin, and another is the island arc. Comparing with the regional lithology, the active continental margin may be from the Mongolia-Okhotsk orogenic belt, and the island arc may be from the northern of the Da Hingan Mountains. The characteristics are concerned with its geotectonic position.
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Xu, Zhongjie, Jintao Kong, Rihui Cheng, and Liaoliang Wang. "U–Pb dating of detrital zircons in the eastern Guangdong Basin, South China, and constraints on the tectonic transformation from the Early to Middle Jurassic." Canadian Journal of Earth Sciences 57, no. 4 (April 2020): 477–93. http://dx.doi.org/10.1139/cjes-2019-0050.

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Controversies exist regarding the mechanism of formation of basins located on the continental margin of South China as well as when they formed. It was ascertained based on clastic petrology, geochemical analysis, and zircon U–Pb dating that the sedimentary provenances in the eastern Guangdong Basin are mainly felsic igneous rocks from the late Early Jurassic to the Middle Jurassic. The late Early Jurassic Qiaoyuan Formation mainly shows major age peaks at approximately 238 Ma, 259 Ma, and 1858 Ma, and the Middle Jurassic Tangxia Formation shows major age peaks at approximately 169 Ma and 172 Ma. From the late Early Jurassic to the Middle Jurassic in the eastern Guangdong Basin, the source region changes from southwestern South China and southern South China to the eastern Nanling Range. It was determined by comparing the detrital zircon ages of the Qiaoyuan Formation and the Tangxia Formation with those of the late Paleozoic to early Mesozoic basins, and analyzing both the geochemical data and sedimentation, that the eastern Guangdong Basin changed from the basin-arc foreland basin of the late Early Jurassic to the back-arc extension basin of the Middle Jurassic. The changes in early Mesozoic detrital zircon age peaks indicate that the tectonic regime of the eastern Guangdong Basin ended the transformation from the Tethyan tectonic domain to the paleo-Pacific tectonic domain in the early Middle Jurassic (approximately 172 Ma).
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Friedman, R. M., J. B. Mahoney, and Y. Cui. "Magmatic evolution of the southern Coast Belt: constraints from Nd–Sr isotopic systematics and geochronology of the southern Coast Plutonic Complex." Canadian Journal of Earth Sciences 32, no. 10 (October 1, 1995): 1681–98. http://dx.doi.org/10.1139/e95-133.

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Igneous rocks of the southern Coast Belt (SCB) and adjacent Insular Belt developed within a Jurassic–Quaternary magmatic arc built across accreted juvenile-arc and oceanic terranes. SCB plutons are mostly of intermediate composition, with I-type characteristics and major element, trace element, and rare earth element geochemistry consistent with genesis in a subduction-related magmatic arc. Ubiquitous xenoliths and migmatitic zones at pluton–county rock contacts indicate that assimilation of crustal rock was an important magmatic process. U–Pb zircon crystallization ages for SCB and Insular Belt igneous rocks indicate an overall eastward migration of the magmatic axis from Middle Jurassic through Late Cretaceous time. Although absent in most rocks, traces of old inherited zircon are present in several Middle Jurassic–Upper Cretaceous plutons in the southeastern Coast Belt. The primitive character and restricted range of Nd–Sr isotopic data for Middle Jurassic to Quaternary igneous rocks of the SCB (εNd = +2.4 to +8.0; Sri = 0.7030 − 0.7042) indicate they were generated in an isotopically juvenile magmatic arc. The distribution of isotopic values along the mantle array and the wide range of fSm/Nd values suggest magma was derived from depleted mantle within a mantle wedge, with little or no contribution from old, isotopically evolved continental material. Although field evidence suggests that assimilation of juvenile crust was an important process during magma ascent, isotopic and geochemical data do not permit discrimination between direct mantle derivation of magmas followed by fractionation and crustal assimilation, and wholesale melting of mafic arc-derived lower crust.
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TROUW, R. A. J., C. W. PASSCHIER, L. S. A. SIMÕES, R. R. ANDREIS, and C. M. VALERIANO. "Mesozoic tectonic evolution of the South Orkney Microcontinent, Scotia arc, Antarctica." Geological Magazine 134, no. 3 (May 1997): 383–401. http://dx.doi.org/10.1017/s0016756897007036.

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The South Orkney Islands are the exposed part of a continental fragment on the southern limb of the Scotia arc. The islands are to a large extent composed of metapelites and metagreywackes of probable Triassic sedimentary age. Deformation related to an accretionary wedge setting, with associated metamorphism from anchizone to the greenschist facies, are of Jurassic age (176–200 Ma). On Powell Island, in the centre of the archipelago, five phases of deformation are recognized. The first three, associated with the main metamorphism, are tentatively correlated with early Jurassic subduction along the Pacific margin of Gondwana. D4 is a phase of middle to late Jurassic crustal extension associated with uplift. This extension phase may be related to opening of the Rocas Verdes basin in southern Chile, associated with the breakup of Gondwanaland. Upper Jurassic conglomerates cover the metamorphic rocks unconformably. D5 is a phase of brittle extensional faulting probably associated with Cenozoic opening of the Powell basin west of the archipelago, and with development of the Scotia arc.
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Dissertations / Theses on the topic "Jurassic Arc"

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Paulson, Benjamin D. DeBari Susan M. "Magmatic processes in the Jurassic Bonanza arc : insights from the Alberni region of Vancouver Island, Canada /." Online version, 2010. http://content.wwu.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=331&CISOBOX=1&REC=3.

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Bereiziat, Gérald. "Variabilité des comportements techniques du Dryas ancien à la fin du Bølling : Analyse techno-économique comparée du matériel lithique de cinq gisements tardiglaciaires du Jura méridional." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14443.

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Ce travail a pour objectif de préciser, à travers la composante lithique de cinq gisements, le cadre chrono-culturel des dernières populations de chasseurs-cueilleurs venues occuper le Jura méridional au sortir de la dernière grande glaciation. Normalisée par une réflexion engagée sur le degré de préservation des ensembles archéologiques, l’étude du matériel lithique, menée sous une double perspective technologique et économique, permet d’éclairer les comportements ayant orienté la conduite technique des individus et de discuter la structuration de ces groupes sur un axe synchronique et diachronique s’étendant du 15ème millénaire au 11ème millénaire avant le présent. Ces nouveaux acquis permettent ainsi de redéfinir la place des assemblages sur l’espace jurassien et de contrôler l’hypothèse d’une région carrefour soumise à de multiples influences
The present thesis is aimed at defining more closely the chronocultural frame of late glacial populations on the basis of lithic artefacts from five sites in the Southern French Jura. Starting from a taphonomic analysis, a techno-economical approach illuminates the variability of individual technological behaviour and finally discusses the particular humain groups on a synchronic and diachronic axis from 15.000 untill 11.000 yr B.P. These new results permit to redefine the place of these assemblages in the context of the Jura mountains and thus to establish the Southern French Jura within the Rhine-Saone-Rhone area as a crossing point of multiple influences
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Schrüfer-Kolb, Irene. "Roman iron production in Britain : technological and socio-economic landscape development along the Jurassic Ridge /." Oxford : Archaeopress, 2004. http://catalogue.bnf.fr/ark:/12148/cb399435708.

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Mendoza, Talavera Oscar. "Les formations orogéniques mésozoiques du Guerrero (Mexique méridional) : contribution à la connaissance de l'évolution géodynamique des cordillères mexicaines." Grenoble 1, 1993. http://www.theses.fr/1993GRE10037.

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Dans le secteur de taxco-zihuatanejo (Mexique méridional) affleurent six séquences volcano-sédimentaires et/ou volcano-plutoniques d'arc datées du jurassique supérieur au crétacé inferieur qui se sont accrétées au craton nord-américain à la fin du crétacé inférieur. La séquence de taxco-taxco viejo comprend des andésites, des dacites et des rhyolites calco-alcalines inter stratifiées dans une sédimentation exclusivement détritique. Elle est affectée par un métamorphisme syncinématique de basse température (221-276c). Cette formation représente vraisemblablement le témoin d'un arc insulaire édifié sur un substratum continental. La séquence de teloloapan comprend des pillow lavas basiques surmontes en concordance par des dépôts volanoclastiques à lentilles de calcaires récifaux de l'aptien et des calcaires récifaux de aptien-albien. Elle est affectée par deux métamorphismes de bas degré: (i) hydrothermal océanique et (ii) syn-cinématique. Le volcanisme comprend surtout des basaltes et des andésites calco-alcalins avec de rares roches acides (andésites et rhyolites tholeiitiques). Comparées aux séries calco-alcalines d'arc intra-océanique les basaltes et andésites sont enrichis en hfse et lree. Les basaltes et andésites présentent des différences géochimiques et un nd compris entre 4,6-1,6. Cette séquence s'est développée dans un environnement d'arc insulaire intra-océanique. La séquence plutono-volcanique d'arcelia comprend un ensemble plutonique qui repose en klippe sur des basaltes en coussins recoupes par des filons basiques. La sédimentation est soit micritique au sein de la pile volcanique soit pelitique à radiolaires au sommet et datée de l'albien-cénomanien. Laves et filons sont affectés par un métamorphisme statique et hydrothermal prehnite-pumpellyite. Les roches basiques d'arcelia y compris les rhyolites montrent des affinités de tholeiite typique d'arc insulaire intra-océanique (nd compris entre +8 et +6). La séquence de huetamo représente le comblement d'un bassin fortement subsident qui se développe entre des îles volcaniques appartenant à un environnement d'arc insulaire. La séquence volcano-sédimentaire de zihuatanejo alocenomanienne est composée de pyroclastites et de laves calco-alcalines déjà différenciées, associées à des calcaires récifaux et/ou des couches rouges continentales. Le complexe de subduction de las ollas comprend des blocs de roches basiques et ultrabasiques enchâssés dans une matrice de serpentine ou de flysch. Ces blocs sont affectés par un métamorphisme hp-bt. Les roches basiques montrent des affinités de tholeiites d'arc, appauvries en terres rares légères. Leurs caractères géochimiques communs suggèrent qu'elles représentent des fragments dissociés d'une croûte supérieure d'un arc insulaire intra-océanique, formée aux tous premiers stades de l'activité de l'arc. Les affinites magmatiques des séries d'arc mésozoïques du Guerrero terrane sont très diversifiées à la fois d'une séquence à l'autre et à l'intérieur d'une même séquence. Cependant, deux ensembles peuvent être reconnus: (i) des tholeiites d'arc appauvries à légèrement enrichies en lree, composées exclusivement de basaltes et de leurs filons nourriciers et présentés a arcelia et las ollas. Quelle que soit la séquence, des cumulats ultrabasiques et basiques sont tectoniquement associés aux laves. Leur source mantellique appauvrie (nd compris entre +8 et +5. 5) est du type lherzolite a spinelles ; (ii) des séries calco-alcalines enrichies ou appauvries en hfs. Les roches basiques prédominent dans la série calco-alcaline enrichie en hfs (famille i), représentée par les basaltes et les andésites de l'aptien-albien de teloloapan et qui dérivent d'une source enrichie de type lherzolite à grenat. La série appauvrie en hfs (nd compris entre +9 et +7,5) est représentée par les andésites de zihuatanejo et les galets de l'aptien-albien de huetamo (famille ii) et qui dérive d'une source mantellique appauvrie, identique à celle des tholeiites mais avec des taux de fusion partielle moins élevés. Enfin la famille iii regroupe les laves de taxco et présente des caractères intermédiaires entre les familles i et ii. Ainsi, les séquences magmatiques orogéniques du Guerrero terrane reflètent la complexité de cet arc ou de ces arcs qui, néanmoins, ont fonctionné pratiquement en même temps
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Gaiffe, Michèle. "Processus pédogénétiques dans le karst jurassien : analyse de la complexation organo-minérale en ambiance calcique /." Besançon : Laboratoire de pédologie, 1987. http://catalogue.bnf.fr/ark:/12148/cb371584624.

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Gibert, Janine. "Ecologie d'un système karstique jurassien hydrogéologie, dérive animale, transits de matières, dynamique de la population de Niphargus, crustacé amphipode." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375980438.

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Hogrel-Made, Martine. "Les Types de sédimentation bréchique dans les chaînons calcaires jurassico-crétacés de la zône de Tardets (Pyrénées atlantiques) relations avec la dynamique de la zône nord-pyrénéenne /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37614357b.

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Hantzpergue, Pierre. "Les Ammonites kimmeridgiennes du haut-fond d'Europe occidentale, Perisphinctidae, Aulacostephanidae, Aspidoceratidae." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605806v.

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Fackler-Adams, Benjamin Nickolas. "Volcanic and sedimentary facies, processes, and tectonics of intra-arc basins Jurassic continental arc of California and Cretaceous oceanic arc of Baja California /." 1997. http://catalog.hathitrust.org/api/volumes/oclc/40816898.html.

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Larocque, Jeffrey Paul. "The role of amphibole in the evolution of arc magmas and crust: the case from the Jurassic Bonanza arc section, Vancouver Island, Canada." Thesis, 2008. http://hdl.handle.net/1828/1309.

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Exposed on Vancouver Island, British Columbia, the Jurassic Bonanza arc is believed to represent the southerly continuation of the Talkeetna arc. Small bodies of mafic and ultramafic cumulates within deeper plutonic levels of the arc constrain the fractionation pathways leading from high-MgO basalt to andesite-dacite compositions. The removal of amphibole from the most primitive non-cumulate compositions controls the compositions of mafic plutons and volcanics until the onset of plagioclase crystallization. This removal is accomplished by the intercumulus crystallization of large amphibole oikocrysts in primitive olivine hornblendite cumulates. Experimental hornblende compositions that crystallize from high-MgO basalts similar to primitive basalts from the Bonanza arc show a good correlation between octahedral Al in hornblende and pressure, and provide a means of estimating crystallization pressures during differentiation of primitive arc basalt. Application of an empirical barometer derived from experimental amphibole data (P = Al(6)/0.056 – 0.143; r2 = 0.923) to natural hornblendes from this study suggests that crystallization of primitive basalts took place at 470-880 MPa. Two-pyroxene thermometry gives a result of 1058 +/- 91 ºC for the only olivine hornblendite sample with both pyroxenes. Lever rule calculations require the removal of 30-45 % hornblende from the most primitive basalt compositions to generate basaltic andesite, and a further 48% crystallization of hornblende gabbro to generate dacitic compositions. Hornblende removal is more efficient at generating intermediate compositions than anhydrous gabbroic fractionating assemblages, which require up to 70% crystallization to reach basaltic andesite from similar starting compositions. There are no magmatic analogues to bulk continental crust in the Bonanza arc; no amount of delamination of ultramafic cumulates will push the bulk arc composition to high-Mg# andesite. Garnet removal appears to be a key factor in producing bulk continental crust.
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Books on the topic "Jurassic Arc"

1

John, David A. Granitic rocks in the Triassic-Jurassic magmatic arc of western Nevada and eastern California. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

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Ligier, Jean-Michel. L' Arc jurassien, région d'Europe: Présent et avenir d'une identité. Yens-sur-Morges: Editions Cabédita, 1999.

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Oramas, Luis Pérez. La cocina de Jurassic Park y otros ensayos visuales. [Caracas]: Fundación Polar, 1998.

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Chiffelle, Frédéric. L' Arc jurassien romand à la frontière des langues: Faut-il craindre la germanisation? Lausanne: Payot, 2000.

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Reymond, Valentine. Musée jurassien des arts, Moutier, 1996-2011. Moutier: Musee jurassien des arts, 2012.

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Radulović, Vladan. Middle Jurassic brachiopods of Laz (Yugoslav part of the Carpatho-Balkan arch) =: Srednjojurski brahiopodi Laza (Jugoslovenski deo Karpato-balkanskog luka). Zagreb: Jugoslavenska akademija znanosti i umjetnosti, 1991.

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Stékoffer, Sarah. La crosse mérovingienne de Saint Germain, premier abbé de Moutier-Grandval (Suisse). Porrentruy: Office du patrimoine historique, Société jurassienne d'émulation, 1996.

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Tom, Badgett, ed. Official Sega Genesis and Game Gear strategies, 2ND Edition. Toronto: Bantam Books, 1991.

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Sandler, Corey. Official Sega Genesis and Game Gear strategies, 3RD Edition. New York: Bantam Books, 1992.

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Howard, McCarthy, and Geological Survey (U.S.), eds. Bibliography for Triassic and Jurassic magmatic arc, western Nevada and eastern California. [Menlo Park, CA]: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Book chapters on the topic "Jurassic Arc"

1

Wolf, F. B., L. Fontboté, and G. C. Amstutz. "The Susana Copper (-Silver) Deposit in Northern Chile Hydrothermal Mineralization Associated with a Jurassic Volcanic Arc." In Stratabound Ore Deposits in the Andes, 319–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-88282-1_24.

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Naipauer, Maximiliano, Ezequiel García Morabito, Marcelo Manassero, Victor V. Valencia, and Victor A. Ramos. "A Provenance Analysis from the Lower Jurassic Units of the Neuquén Basin. Volcanic Arc or Intraplate Magmatic Input?" In The Evolution of the Chilean-Argentinean Andes, 191–222. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-67774-3_8.

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Mattinson, James M., Emile A. Pessagno, Homer Montgomery, and Clifford A. Hopson. "Late Jurassic age of oceanic basement at La Désirade Island, Lesser Antilles arc." In Special Paper 438: Ophiolites, Arcs, and Batholiths: A Tribute to Cliff Hopson, 175–90. Geological Society of America, 2008. http://dx.doi.org/10.1130/2008.2438(06).

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Gerber, Miquette E., Calvin F. Miller, and Joseph L. Wooden. "Plutonism at the interior margin of the Jurassic magmatic arc, Mojave Desert, California." In Geological Society of America Special Papers, 351–74. Geological Society of America, 1995. http://dx.doi.org/10.1130/spe299-p351.

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Haxel, Gordon B., James E. Wright, Nancy R. Riggs, Richard M. Tosdal, and Daniel J. May. "Middle Jurassic Topawa Group, Baboquivari Mountains, south-central Arizona: Volcanic and sedimentary record of deep basins within the Jurassic magmatic arc." In The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2393-0.329.

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Jones, Norris W., James W. McKee, Thomas H. Anderson, and Leon T. Silver. "Jurassic volcanic rocks in northeastern Mexico: A possible remnant of a Cordilleran magmatic arc." In Special Paper 301: Studies on the Mesozoic of Sonora and adjacent areas, 179–90. Geological Society of America, 1995. http://dx.doi.org/10.1130/0-8137-2301-9.179.

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Busby, Cathy J., Kari N. Bassett, Maureen B. Steiner, and Nancy R. Riggs. "Climatic and tectonic controls on Jurassic intra-arc basins related to northward drift of North America." In The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives. Geological Society of America, 2005. http://dx.doi.org/10.1130/0-8137-2393-0.359.

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Busby, Cathy J., Elizabeth R. Schermer, and James M. Mattinson. "Extensional arc setting and ages of Middle Jurassic eolianites, Cowhole Mountains (eastern Mojave Desert block, California)." In Geologic Evolution of the Mojave Desert and Southwestern Basin and Range. Geological Society of America, 2002. http://dx.doi.org/10.1130/0-8137-1195-9.79.

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Yule, J. Douglas, Jason B. Saleeby, and Calvin G. Barnes. "A rift-edge facies of the Late Jurassic Rogue–Chetco arc and Josephine ophiolite, Klamath Mountains, Oregon." In Geological Studies in the Klamath Mountains Province, California and Oregon: A volume in honor of William P. Irwin. Geological Society of America, 2006. http://dx.doi.org/10.1130/2006.2410(03).

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Dilek, Y., P. Thy, E. M. Moores, and S. Grundvig. "Late Paleozoic–early Mesozoic oceanic basement of a Jurassic arc terrane in the northwestern Sierra Nevada, California." In Geological Society of America Special Papers, 351–70. Geological Society of America, 1990. http://dx.doi.org/10.1130/spe255-p351.

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Conference papers on the topic "Jurassic Arc"

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Busby, Cathy J., and Nancy R. Riggs. "EXTENSIONAL AND TRANSTENSIONAL CONTINENTAL ARC BASINS: LESSONS FROM THE JURASSIC ARC, SOUTHWEST CORDILLERA." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-340031.

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Paterson, Scott, Snir Attia, Katie E. Ardill, and Abigail J. Wesley. "TIME SERIES PERSPECTIVE OF EVOLVING JURASSIC ARC BEHAVIOR IN THE CENTRAL SIERRA NEVADA ARC." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-339616.

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Kimbrough, David L. "MIDDLE JURASSIC CORDILLERAN ARC FLARE-UP AND BAJOCIAN ENVIRONMENTAL IMPACT." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-332926.

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Morris, Rebecca, and Dante Canil. "MAGMA-CARBONATE INTERACTIONS WITHIN THE JURASSIC BONANZA ARC, VANCOUVER ISLAND." In 116th Annual GSA Cordilleran Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020cd-347049.

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LoBianco, Samuel J. C., Eben B. Hodgin, and Francis A. Macdonald. "WESTWARD JURASSIC BACK-ARC BASIN MIGRATION IN THE CENTRAL ANDEAN CORDILLERA." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-323406.

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Kimbrough, David L. "THE JURASSIC ARC SILICIC LARGE IGNEOUS PROVINCE (SLIP) OF SOUTHWESTERN NORTH AMERICA." In Joint 70th Annual Rocky Mountain GSA Section / 114th Annual Cordilleran GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018rm-314203.

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Vasey, Dylan, Eric Cowgill, and Kari M. Cooper. "GEOCHEMISTRY OF MODERN CONTINENTAL BACK-ARC BASINS AND TRIASSIC-JURASSIC COLLISION-INDUCED BACK-ARC SPREADING IN THE CAUCASUS." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-360020.

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Wyld, Sandra J., and James E. Wright. "JURASSIC BACK-ARC IGNEOUS PROVINCE OF THE NORTHERN GREAT BASIN: EVIDENCE FOR SLAB BREAK-OFF FOLLOWING ARC COLLISION." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-340652.

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Morris, Rebecca, and Dante Canil. "CO2 TRANSPORT IN ARC MAGMAS: EVIDENCE FROM UNIQUE ORBICULAR DIKES IN THE JURASSIC BONANZA ARC, VANCOUVER ISLAND, CANADA." In Cordilleran Section-117th Annual Meeting-2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021cd-363011.

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Clemens-Knott, Diane, Michelle L. Gevedon, Adam J. Ianno, and Kalie M. Duccini. "RECONSTRUCTING THE RECORD OF JURASSIC ARC MAGMATISM, KERN PLATEAU, SOUTHERN SIERRA NEVADA, CA." In 112th Annual GSA Cordilleran Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016cd-274737.

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Reports on the topic "Jurassic Arc"

1

Johannson, G. G., and V. J. McNicoll. New U-Pb data from the Laberge Group, northwest British Columbia: implications for Stikinian arc evolution and Lower Jurassic time scale calibrations. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1997. http://dx.doi.org/10.4095/209098.

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Chapman, J. B. Are there elephants hiding in the Jurassic of Yukon? A tectonomagmatic perspective on porphyry prospectivity. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296406.

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Chapman, J. B. Are there elephants hiding in the Jurassic of Yukon? A tectonomagmatic perspective on porphyry prospectivity. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296485.

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Tweet, Justin S., Vincent L. Santucci, Kenneth Convery, Jonathan Hoffman, and Laura Kirn. Channel Islands National Park: Paleontological resource inventory (public version). National Park Service, September 2020. http://dx.doi.org/10.36967/nrr-2278664.

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Channel Island National Park (CHIS), incorporating five islands off the coast of southern California (Anacapa Island, San Miguel Island, Santa Barbara Island, Santa Cruz Island, and Santa Rosa Island), has an outstanding paleontological record. The park has significant fossils dating from the Late Cretaceous to the Holocene, representing organisms of the sea, the land, and the air. Highlights include: the famous pygmy mammoths that inhabited the conjoined northern islands during the late Pleistocene; the best fossil avifauna of any National Park Service (NPS) unit; intertwined paleontological and cultural records extending into the latest Pleistocene, including Arlington Man, the oldest well-dated human known from North America; calichified “fossil forests”; records of Miocene desmostylians and sirenians, unusual sea mammals; abundant Pleistocene mollusks illustrating changes in sea level and ocean temperature; one of the most thoroughly studied records of microfossils in the NPS; and type specimens for 23 fossil taxa. Paleontological research on the islands of CHIS began in the second half of the 19th century. The first discovery of a mammoth specimen was reported in 1873. Research can be divided into four periods: 1) the few early reports from the 19th century; 2) a sustained burst of activity in the 1920s and 1930s; 3) a second burst from the 1950s into the 1970s; and 4) the modern period of activity, symbolically opened with the 1994 discovery of a nearly complete pygmy mammoth skeleton on Santa Rosa Island. The work associated with this paleontological resource inventory may be considered the beginning of a fifth period. Fossils were specifically mentioned in the 1938 proclamation establishing what was then Channel Islands National Monument, making CHIS one of 18 NPS areas for which paleontological resources are referenced in the enabling legislation. Each of the five islands of CHIS has distinct paleontological and geological records, each has some kind of fossil resources, and almost all of the sedimentary formations on the islands are fossiliferous within CHIS. Anacapa Island and Santa Barbara Island, the two smallest islands, are primarily composed of Miocene volcanic rocks interfingered with small quantities of sedimentary rock and covered with a veneer of Quaternary sediments. Santa Barbara stands apart from Anacapa because it was never part of Santarosae, the landmass that existed at times in the Pleistocene when sea level was low enough that the four northern islands were connected. San Miguel Island, Santa Cruz Island, and Santa Rosa Island have more complex geologic histories. Of these three islands, San Miguel Island has relatively simple geologic structure and few formations. Santa Cruz Island has the most varied geology of the islands, as well as the longest rock record exposed at the surface, beginning with Jurassic metamorphic and intrusive igneous rocks. The Channel Islands have been uplifted and faulted in a complex 20-million-year-long geologic episode tied to the collision of the North American and Pacific Places, the initiation of the San Andreas fault system, and the 90° clockwise rotation of the Transverse Ranges, of which the northern Channel Islands are the westernmost part. Widespread volcanic activity from about 19 to 14 million years ago is evidenced by the igneous rocks found on each island.
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