Tesi sul tema "Petrogenesis"
Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili
Vedi i top-50 saggi (tesi di laurea o di dottorato) per l'attività di ricerca sul tema "Petrogenesis".
Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.
Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.
Vedi le tesi di molte aree scientifiche e compila una bibliografia corretta.
Colgan, Elizabeth Anne. "Petrogenesis of the Eshowe melilitites". Master's thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/17331.
Testo completoThe Eshowe melilitites intruded marginal cratonic crust at approximately 80my. Their intrusion followed after a long period of extensive rift tectonism associated with the breakup of Gondwanaland. The intrusives represent the final phase of alkaline and basaltic magmatism that commenced at about 200my. This magmatism was probably related to mantle processes responsible for the continental fragmentation and was controlled by a fluctuating mantle thermal regime. The Eshowe melilitites intrude an area of attenuated crust in an essentially rift valley setting. Petrological, and chemical evidence suggest that the Emtilombo melilitite does not represent crystallisation of a primary magma. The magma was generated in the asthenosphere but reacted with incompatible element and probably CO₂ and H₂O enriched lithosphere and perhaps crustal sources on its way to the surface. The Emtilombo melilitite contains microxenoliths of mantle derived spinel peridotite and of a suite of dunitic rocks that are believed to be high pressure cumulates of earlier alkaline magmas. These latter trapped melts would have introduced metasomatising agents into the lithosphere. The dunitic melts are believed to represent earlier intrusions related to the Eshowe alkaline volcanism. The chemistry of the olivine phenocrysts and microphenocrysts and complex zonation patterns on olivine xenocrysts (macrocryst and some complex phenocrysts) suggest the Emtilombo magma formed by mixing of several batches of melt. The 'parental magmas' to the Eshowe occurrences are therefore considered to consist of a mixture of asthenospheric and lithospheric components and a variety of different melts. The 'parental magma' to the Emtilombo dyke was an incompatible element enriched ultramafic melt that contained microxenoliths of spinel lherzolite and the dunitic suite of rocks. Changing oxygen fugacities are believed to be controlled by a loss of volatiles at relatively shallow depths in the mantle or lower crust. These changes are reflected by the spinel chemical trends and perovskite crystallisation. The change occurred after complex zonation patterns had developed on the olivines. The microphenocryst olivines are believed to be the only population of grains that crystallised from the Emtilombo 'parental magma'. Mode of emplacement of the melilitites is probably influenced by the nature and volume of magma in the intrusion, its volatile content, and to some extent the nature of the country rock. The Eshowe melilitites show a wide variety of intrusive modes and also demonstrate how late stage processes, possibly during or post consolidation, influence the geochemistry of the rock type.
Wang, Yan. "Petrogenesis of permian flood basalts and mafic-ultramafic intrusions in the Jinping (SW China) and Song Da (Northern Vietnam) districts". Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37758743.
Testo completoOzdemir, Yavuz. "Volcanostratigraphy And Petrogenesis Of Suphan Stratovolcano". Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613051/index.pdf.
Testo completophan, which is a 4050 m high Quaternary stratovolcano in eastern Anatolia. The eruptive products of Sü
phan Stratovolcano, including transitional mildly alkaline to calc-alkaline rocks, are lavas, domes and pyroclastics ranging in composition from basalts to rhyolites. Ar-Ar age data from different levels of the volcanostratigrafic succession yield a range of 0.76-0.06 Ma. Textural features, wide temperature ranges obtained for intermediate members, and the linear trends of whole-rock geochemistry are strongly suggestive of magma mixing in the evolution of Sü
phan volcanics. Presence of crystal clots in many lavas suggests that cogenetic plutonic rocks were also involved in the mixing process. Comparison of whole-rock, melt inclusion and glass chemistry data of Sü
phan to data from experimental studies reported in literature indicate that the melt inclusions describe true liquid lines of descent from a common hydrous parent at pressures of ~500 MPa. EC-AFC modeling of trace element and isotopic compositions reveals 2-8% crustal contamination in the differentiated lavas. REE modeling indicates that primitive rocks of Sü
phan volcanics were products of mixing of melts from spinel and garnet lherzolite sources, with contributions of 60% and 40%, respectively, in the mixture. A two-stage petrogenetic model is proposed for Suphan stratovolcano. Mantle- derived melts stall and undergo chemical differentiation in a deep hot zone in lower to mid-crust
variably evolved melts ascending from this zone are arrested and mixed at a shallow level where they construct a sub-volcanic magma reservoir beneath Suphan.
Student, James John. "Silicate Melt Inclusions in Igneous Petrogenesis". Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28719.
Testo completoPh. D.
Jurinski, Joseph B. "Petrogenesis of the Moosehorn igneous complex, Maine". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-04072010-020130/.
Testo completoBrown, Elizabeth Ann. "Rhyolite Petrogenesis at Tower Mountain Caldera, OR". PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3997.
Testo completoWallace, Graeme M. B. "Petrogenesis of the McGerrigle plutonic complex, Gaspe, Quebec". Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63877.
Testo completoShaw, Andrew. "The petrogenesis of Hercynian granites, French massif central". Thesis, Birkbeck (University of London), 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397092.
Testo completoBecker, Mona Louise. "Petrogenesis of the Springfield Granodiorite, southeast Pennsylvania Piedmont". Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-05092009-040419/.
Testo completoWood, Patricia Ann. "Petrogenesis of the Spruce Pine pegmatites, North Carolina". Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08222008-063320/.
Testo completoPaterson, Bruce Andrew. "Accessory mineral growth histories : implications for granitoid petrogenesis". Thesis, University of St Andrews, 1990. http://hdl.handle.net/10023/11059.
Testo completoMensing, Teresa Marie. "Geology and petrogenesis of the Kirkpatrick Basalt, Pain Mesa and Solo Nunatak, Northern Victoria Land, Antarctica /". The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu14873326364761.
Testo completoBadger, Robert L. "Geochemistry and petrogenesis of the Catoctin Volcanic Province, central Appalachians". Diss., This resource online, 1989. http://scholar.lib.vt.edu/theses/available/etd-03042009-041139/.
Testo completoTherriault, Ann Marie. "Petrogenesis of the Sudbury Igneous Complex: The shocking story". Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/6378.
Testo completoRoopnarain, Sherissa. "Petrogenesis of Carbonatites in the Alnö Complex, Central Sweden". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-215436.
Testo completoAboazoum, Ali Saleh Ali. "Petrogenesis of Palaeocene granites, Island of Skye, N.W. Scotland". Thesis, University of Glasgow, 1995. http://theses.gla.ac.uk/6432/.
Testo completoParkinson, Ian J. "Geochemistry and petrogenesis of forearc peridotites, ODP Leg 125". Thesis, Durham University, 1993. http://etheses.dur.ac.uk/5637/.
Testo completoSmith, T. P. L. "Petrogenesis of a composite Hercynian pluton, Santa Eulalia, Portugal". Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233641.
Testo completoHumphreys, Madeleine Clare Sperryn. "Andesite petrogenesis and magmatic processes at Shiveluch Volcano, Kamchatka". Thesis, University of Bristol, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425118.
Testo completoHickmott, Donald Degarmo. "Trace element zoning in garnets--implications for metamorphic petrogenesis". Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14743.
Testo completoPattison, David R. M. "Petrogenesis of pelitic rocks in the Ballachulish thermal aureole". Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/15601.
Testo completoIlbeyli, Nurdane. "Petrogenesis of collision-related plutonic rocks, central Anatolia(Turkey)". Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4889/.
Testo completoSevers, Matthew Jeremiah. "Applications of Melt Inclusions to Problems in Igneous Petrogenesis". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28310.
Testo completoPh. D.
Allen, Charlotte M. "Petrogenesis of the reversely zoned Turtle pluton, Southeastern California". Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54480.
Testo completoPh. D.
Elliott, Timothy Richard. "Element fractionation in the petrogenesis of ocean island basalts". Thesis, Open University, 1991. http://oro.open.ac.uk/57323/.
Testo completoDavies, Marc Kerry. "The origin and petrogenesis of the Ethiopian flood basalts". Thesis, Open University, 2008. http://oro.open.ac.uk/54645/.
Testo completoKwiecien, William. "The geology, geochemistry and petrogenesis of the Monsildale granodiorite". Thesis, Queensland University of Technology, 1996. https://eprints.qut.edu.au/36947/1/36947_Kwiecien_1996.pdf.
Testo completoBabu, E. V. S. S. K. "Petrological studies on the Chimakurti gabbro-anorthosite-olivine-clinopyroxenite complex and its contact aureole, India". Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243040.
Testo completoCosta, Felipe Grandjean da. "Petrogenese do granodiorito Fazenda Gavião : registro de uma colisão arco-continente no greenstone belt do Rio Itapicuru, Craton do São Francisco, Bahia". [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287283.
Testo completoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias
Made available in DSpace on 2018-08-11T16:36:13Z (GMT). No. of bitstreams: 1 Costa_FelipeGrandjeanda_M.pdf: 10447471 bytes, checksum: c27e2dc3f77cf21b0841b3e40d6e57ae (MD5) Previous issue date: 2008
Resumo: O greenstone belt do Rio Itapicuru é uma seqüência vulcano-sedimentar paleoproterozóica cortada por uma série de corpos plutônicos com idades entre 2160-2070 Ma. O Granodiorito Fazenda Gavião (GFG) é um corpo intrusivo em metabasaltos da porção ocidental do greenstone, próximo ao contato com o embasamento arqueano. Este pluton tem textura fanerítica média e hornblenda como mineral máfico dominante. Uma característica de campo é a presença de enclaves máficos magmáticos e diques máficos sinmagmáticos com evidências da mistura física de magmas (magma mingling). A analise geoquímica classifica o Granodiorito Fazenda Gavião como uma rocha intermediária (SiO2~63 wt%), com composição de granodiorito a quartzo-monzodiorito, da série cálcioalcalina de médio a alto-K, metaluminoso, espectro Terras Raras fracionado (razão (La/Yb)N = 22.81), alto Sr (900-800 ppm), alto Ba (1000-1500 ppm), e alta razão Sr/Y. Comparando com a geoquímica de outros plutons da área, o GFG apresenta assinatura dos elementos traço similar aos plutons alcalinos, sugerindo uma provável ¿consangüinidade¿ magmática entre estes plutons. A característica geoquímica dos diques máficos (appinitos) associados ao GFG é similar ao granodiorito em questão, porém com uma maior abundancia em Ba, Sr, MgO, Ni, Cr, K2O, e Terras Raras leves, sugerindo que estes diques são originados da fusão parcial de uma fonte mantélica enriquecida. O GFG apresenta semelhanças com rochas adakíticas e plutons TTGs, mas diferente destas rochas, apresenta maior conteúdo em K2O. É possível que o GFG foi originado pela fusão parcial de crosta máfica (crosta inferior?) (com granada e sem plagioclásio no resíduo) em função do acúmulo de magma máfico na base desta crosta (underplating of mafic magmas). O magma félsico gerado, provavelmente se misturou com uma pequena porcentagem do magma máfico, como é sugerido pelas feições de magma mingling observadas em campo. O GFG com idade de 2106 + 6 Ma (U-Pb SHRIMP em zircões) é mais jovem do que o magmatismo TTG/cálcio-alcalino (2163-2127 Ma) e é contemporâneo ao magmatismo potássicoultrapotássico (ca. 2110-2105 Ma) presente no contato embasamento-greenstone. O modelo de evolução geológica desenvolvido nesta dissertação sugere que os plutons ricos-em-K do greenstone belt do Rio Itapicuru são o registro da colisão de um arco oceânico com uma margem continental em ~2110-2105 Ma, precedendo outro evento colisional com retrabalhamento crustal em ~2080-2070 Ma
Abstract: The Rio Itapicuru greenstone belt is a gold-bearing Palaeoproterozoic volcanic-sedimentary sequence intruded by several granitic plutons in the time interval 2160-2070 Ma. The Fazenda Gavião granodiorite (FGG) is one of a set of plutons emplaced along the western boundary of the greenstone belt with the Archaean basement complex. The FGG is largely composed of a homogeneous coarse-grained hornblende granodiorite, occasionally crosscut by appinitic mafic dykes. Minor mafic enclaves and amphibolite xenoliths are common close to the contact with the host metabasalts. The FGG is a metaluminous medium-K to high-K calc-alkaline body with relatively constant silica abundances (SiO2 ~ 63-66 wt %). It shows fractionated REE patterns (LaN/YbN ~22), high Sr (900-800 ppm), high Ba (1000- 1500 ppm), and high Sr/Y ratios. Comparing with the geochemistry of other plutons of the area, the trace elements signature of the FGG suggests a probable magmatic consanguinity between this pluton and the alkaline plutons of the area. Similar geochemical characteristics of the FGG are observed in the associated appinitic dykes, which show relatively higher abundances of Ba, Sr, MgO, Ni, Cr, K2O, and the light rare earth elements, suggesting they derived from partial melts of an enriched mantle source. The FGG shares several geochemical characteristics with adakites and TTG plutons, but unlike these series it shows relatively higher K2O abundance. It is suggested here that the FGG originated from partial melts of the mafic lower crust (with garnet and no plagioclase in the residue) possibly triggered by underplating of mantle-derived, enriched mafic magmas, of which the appinitic mafic dykes may be a representative remnant. The granitic melt mixed with minor amounts of the appinitic magma, as suggest by magma mingling. The 2106 + 6 Ma-old (UPb SHRIMP in zircons) FGG is younger in age than the early (2163-2127 Ma) TTG/calcalkaline arc plutons of the greenstone, and is close-related in time to the young potassicultrapotassic plutons (ca. 2110-2105 Ma) emplaced along the basement-greenstone boundary. We suggest that the K-rich plutons in the Rio Itapicuru greenstone belt are the records of island arc-continent collision at ~2110-2105 Ma, preceding major continental rework and collision at ~2080-2070 Ma
Mestrado
Geologia e Recursos Naturais
Mestre em Geociências
Chan, Heung Ngai. "Petrogenesis and tectonic evolution of Yarlung Tsangpo ophiolites, south Tibet". Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491339.
Testo completoDesRoches, Valérie. "Petrogenesis of the pyroxenite units in the Muskox intrusion, N.W.T". Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22495.
Testo completoCadman, Andrew Christopher. "The petrogenesis and emplacement of Proterozoic dyke swarms in Labrador". Thesis, University of Leicester, 1992. http://hdl.handle.net/2381/34998.
Testo completoHodges, Sean Patrick. "Petrogenesis of the phonolitic rocks of the Velay oriental, France". Thesis, University of Oxford, 1991. http://ora.ox.ac.uk/objects/uuid:1d8c0fe8-9f9e-4348-9c4c-21174aa56e70.
Testo completoAldanmaz, Ercan. "Petrogenesis of Late Cenozoic collision volcanism in Western Anatolia, Turkey". Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4658/.
Testo completoMoodley, Jason Anthony. "Petrogenesis of the Bysteek and Koenap Formation Migmatites, Central Namaqualand". Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001574.
Testo completoCorbett, Helen Elizabeth. "Petrogenesis of the Tusas Mountain Granite, north-central New Mexico". The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343318854.
Testo completoLewis, C. L. E. "Petrogenesis and thermal history of the Kunlun batholith, northern Tibet". Thesis, Open University, 1988. http://oro.open.ac.uk/54368/.
Testo completoSeligman, Angela. "Oxygen and hydrogen investigation of volcanic rocks: Petrogenesis to paleoclimate". Thesis, University of Oregon, 2016. http://hdl.handle.net/1794/20547.
Testo completoEssex, Richard M. "Age and petrogenesis of the Striped Rock granite pluton : Blue Ridge province, southwestern Virginia /". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-03302010-020037/.
Testo completo3 maps in back pocket. Vita. Abstract. Includes bibliographical references (leaves 83-89). Also available via the Internet.
Ruggiero, Alberto. "A unidade Maria Preta : geologia, geoquimica e petrogenese de rochas vulcanicas e sub-vulcanicas intermediarais a felsicas no "Greenstone Belt" do rio Itapicuru, Bahia". [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287255.
Testo completoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias
Made available in DSpace on 2018-08-12T03:34:56Z (GMT). No. of bitstreams: 1 Ruggiero_Alberto_M.pdf: 5764806 bytes, checksum: cdadd28e98d86c8738fcf5955bd71eea (MD5) Previous issue date: 2008
Resumo: Novos dados geoquímicos nas rochas vulcânicas andesíticas e dacíticas da Unidade Maria Preta (UMP), Greenstone Belt do Rio Itapicuru, revelaram a presença de dois grupos geoquímicos distintos: um de rochas com afinidade adakítica e outro com caráter cálcio-alcalino. A suíte adakítica (ADK), localizada nas porções oeste da UMP, é caracterizada pelos altos valores de Sr/Y (Sr ~900 ppm, Y~5ppm); Na2O ~ 4,5ppm (K2O/Na2O ~0,3). É caracterizada também pelo enriquecimento de LILE (elementos litófilos de alto raio iônico) relativos aos HFSE (elementos de elevado potencial iônico) e também pelo moderado fracionamento dos elementos terras-raras (La/Yb ~ 12). A suíte cálcio-alcalina (CA) apresenta baixas razões Sr/Y (Sr ~ 170 ppm, Y~ 22 ppm), menor fracionamento de elementos terras-raras (La/Yb ~8) e anomalias negativas de Eu. No entanto apresenta maiores concentrações de elementos incompatíveis (Y ~22ppm, Zr ~142ppm, Th ~6ppm) e também Cr e Ni. Foi revelado, através de modelagem geoquímica que as duas suítes não se relacionam por cristalização fracionada. Contudo a suíte Adk apresenta indícios de cristalização fracionada de hornblenda enquanto que na CA a cristalização fracionada de plagioclásio desempenhou papel importante. O ambiente mais provável para a formação das rochas vulcânicas cálcioalcalinas é fusão em baixas profundidades da cunha do manto metassomatizado por fluídos liberados a partir de uma crosta oceânica subductada, seguida por fracionamento de plagioclásio. A geoquímica dos adakitos requer fusão de meta-basaltos hidratados em pressões elevadas, onde granada+hornblenda são estáveis e constituem o restito da fusão. Em geral, as rochas adakíticas apresentam indícios de pouca interação do magma original com uma coluna de manto peridotitico, como visto em adakitos atuais, dados os baixos valores de Cr e Ni em relação aos adakitos cenozóicos. A suíte cálcio-alcalina apresenta menores valores de fugacidade de oxigênio no sítio de extração do magma (entre -3 e -1 FMQ). Ao contrário, os adakitos apresentam maiores valores (entre -1 e +0,5 FMQ), semelhantes aos valores encontrados em adakitos modernos formados por fusão de crosta oceânica subductada. Dados de isótopos de Sm-Nd forneceram idades modelo TDM para a suíte adakítica de 2.213 a 2.010 Ma, com valores de eNdT de +3,9 a +1,7. A suíte cálcio-alcalina revelou idades modelo mais antigas, entre 2.330 e 2.279 Ma e menores valores de eNdT de +0,7 a + 1,3. Estes valores indicam magmatismo juvenil para ambas as suítes, porém com maior tempo residência crustal para a fonte das rochas cálcio-alcalinas, ou interação do magma com crosta mais antiga. Datação U-P SHRIMP em andesito adakítico revelou idade de cristalização de 2.081 ±9 Ma e a presença de zircões herdados arqueanos (3364, 3017, 3064 Ma), evidenciando que o magma gerado em zona de subducção interagiu com crosta arqueana, provavelmente o embasamento do Greenstone Belt do Rio Itapicuru, sugerindo então um provável arco continental como origem da Unidade Maria Preta. Esses dados sugerem que o vulcanismo intermediário a félsico do Greenstone Belt do Rio Itapicuru foi formado ou teve relação direta com subducção. Esta possivelmente teve uma vergência de leste para oeste, evidenciada pela zonalidade na geoquímica das rochas vulcânicas (adakitos à oeste e cálcio-alcalinas a leste).
Abstract: New geochemical data on andesites and dacites of the Maria Preta Unit, Rio Itapicuru Greenstone Belt, revealed two distinct geochemical groups: one of adakitic affinity and another of typical calc-alkaline. The adakitic suite, localized west in the unit, is characterized by high values of Sr/Y and Ti/YN >1. It shows enrichment in LFSE (Low Field Strength Elements) relative to HFSE (High Field Strength Elements) and a moderate rare earth element fractionation. The calc-alkaline suite (CA) shows low Sr/Y ratios, less rare earth elements fractionation and negative Eu anomalies. On the other hand it shows higher incompatible elements abundances (Y, Zr, Th) and high Cr and Ni concentrations. The two suites cannot be linked by fractional crystallization and are derived from different sources (distinct initial Nd ratios). The most probable setting for the formation of CA is partial melting of mantle peridotite modified by hydrous fluids released from a subducting slab, followed by low pressure plagioclase fractionation. The adakite geochemical features require partial melting of hydrous metabasalts at depths high enough to stabilize garnet+hornblende as the residual phase. This suite does not reveal significant interactions with the mantle, as shown by its lower Cr and Ni values than Cenozoic adakites. For an assumed 2170 Ma age, the Sm-Nd isotope data show higher eNd(t) for the adakites (+4,8 to +2,5) than for the calc-alkaline suite (+1,9 to +1,4). These data indicate a juvenile source for the UMP volcanic rocks. U-Pb SHRIMP dating indicates a crystallization age of 2,081 ± 9 Ma for the adakitic volcanic. Inherited Archean zircons (3364, 3017, 3064 Ma) evidence a magma generated at a subduction zone followed by interaction with Archean lithosphere, probably the basement of the Rio Itapicuru Greenstone Belt. The calc-alkaline suite shows low oxygen fugacities at the magma extraction site (between -3 e -1 FMQ). On the other side, the adakites shows higher values (between -1 e +0,5 FMQ), similar to modern adakites formed by a subducting slab melt. This results suggests that the UMP volcanism was formed or was directly connected to a subduction. The geographic position of the two suites, i.e. adakites to the west of the calc-alkaline volcanics, suggests subduction of an oceanic plate to the west.
Mestrado
Geologia e Recursos Naturais
Mestre em Geociências
Pembroke, James William. "The recognition and significance of magma mixing in granites". Thesis, Oxford Brookes University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364075.
Testo completoSkae, Andrew. "The petrology of the Buckland volcanic province, Central Queensland, Australia". Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:e2a73f94-5e7b-4c3e-98e5-bd052dbf3205.
Testo completoBrown, P. J. "Petrogenesis of Ni-Cu ore bodies, their host rocks and country rocks at Selebi-Phikwe, Eastern Botswana". Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381153.
Testo completoFraser, K. J. "Petrogenesis of kimberlites from South Africa and lamproites from Western Australia and North America". Thesis, Open University, 1987. http://oro.open.ac.uk/54611/.
Testo completoPatridge, Karyn Ann. "Geochemistry and petrogenesis of John Day ash flows near Prineville, Oregon". Pullman, Wash. : Washington State University, 2010. http://www.dissertations.wsu.edu/Thesis/Spring2010/k_patridge_042110.pdf.
Testo completoTitle from PDF title page (viewed on July 9, 2010). "School of Earth and Environmental Sciences." Includes bibliographical references (p. 105-117).
de, Oliveira Elson Paiva. "Petrogenesis of mafic-ultramafic rocks from the Precambrian Curaca terrane, Brazil". Thesis, University of Leicester, 1990. http://hdl.handle.net/2381/35079.
Testo completoJobin-Bevans, L. Scott. "Geology, mineral chemistry and petrogenesis of the Pipestone Lake anorthosite complex". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23356.pdf.
Testo completoLiu, Mian. "Migmatization and volcanic petrogenesis in the La Grande greenstone belt, Quebec". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63353.
Testo completoWard, Susan E. "The petrogenesis of the Mesoproterozoic mafic dykes and sills of Zimbabwe". Thesis, University of Portsmouth, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444475.
Testo completoMason, Paul Robert David. "Petrogenesis of subduction-related magmatic rocks from the East Carpathians, Romania". Thesis, Birkbeck (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307401.
Testo completo