Dissertations / Theses on the topic 'Geochemical evolution'
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Rapien, Maria H. "Geochemical Evolution at White Island, New Zealand." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36832.
Full textMaster of Science
Gleeson, Sarah Anne. "The geochemical evolution of mineralising brines, south Cornwall, U.K." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263363.
Full textMohamed, Essam Abdelrahman. "Groundwater and surface water geochemical evolution : Liverpool area, UK." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439482.
Full textGreenwood, Joanna Catherine. "The secular geochemical evolution of the Trindade mantle plum." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439171.
Full textGerman, Laura Lynne. "The Geochemical Evolution of the Blood Falls Hypersaline System." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1438715896.
Full textSong, Suckhwan. "Geochemical evolution of Phanerozoic Lithospheric mantle beneath S.E. South Australia /." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phs6983.pdf.
Full textCaracausi, Antonio. "Noble gases as geochemical tracers of Earth's dynamic and evolution." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0339.
Full textIn my project, I used the nobles gases (He, Ne, Ar, Kr and Xe) to investigate natural processes occurring in different geodynamical contexts (i.e., subduction, continental collision, rifting), showing how the use of the noble gases is fundamental to constrain the origin of volatiles, and to investigate the Earth interior. Furthermore, I also used these volatiles to recognize the processes (water-gas-rock interaction) that occur during the fluids up rise from the Earth’s interior to the atmosphere and quantitatively constrain the extents of these processes. The results of my project are summarized in five main topics: 1) Insights into the degassing history of Earth’s mantle from high precision noble gas analysis of magmatic gas 2) Noble Gas and Carbon Isotope Systematics at the Seemingly Inactive Ciomadul Volcano (Romania): Evidence for Volcanic Degassing 3) Mantle‐Derived Fluids in the East Java Sedimentary Basin, Indonesia 4) Outgassing of Mantle Volatiles in Compressional Tectonic Regime Away From Volcanism: The Role of Continental Delamination 5) Continental degassing of helium in an active tectonic setting (northern Italy): the role of seismicity
Roche, Richard Louis. "Stratigraphic and geochemical evolution of the Glass Buttes complex, Oregon." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3748.
Full textWhattam, Scott A. "Evolution of the Northland ophiolite, New Zealand: geochemical, geochronological and palaeomagneticconstraints." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31244890.
Full textBrownless, M. A. "Geochemical evolution, fluid-rock interaction and diagenesis of a carbonate-evaporite sequence." Thesis, University of East Anglia, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317981.
Full textMcGrath, Annette Gail. "Structural and geochemical evolution of an extensional metamorphic core complex, Paros, Greece." Thesis, University of Leicester, 1999. http://hdl.handle.net/2381/35066.
Full textFassio, Joseph Michael. "Geochemical Evolution of Ferruginous Bauxite Deposits in Northwestern Oregon and Southwestern Washington." PDXScholar, 1990. https://pdxscholar.library.pdx.edu/open_access_etds/3821.
Full textRoberts, Martin Andrew. "The geochemical and volcanological evolution of the Mt. Meru region, northern Tanzania." Thesis, University of Cambridge, 2003. https://www.repository.cam.ac.uk/handle/1810/251861.
Full textAnthony, Darlene. "Seasonal Effects on the Geochemical Evolution of the Logsdon River, Mammoth Cave, Kentucky." TopSCHOLAR®, 1998. http://digitalcommons.wku.edu/theses/331.
Full textCox, David. "Surficial and geochemical evolution of periglacial soils : applications to mineral exploration in Yukon." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44758.
Full textWalker, Cherry L. "The volcanic history and geochemical evolution of the Hveragerði Region, S. W. Iceland." Thesis, Durham University, 1992. http://etheses.dur.ac.uk/5610/.
Full textHoostal, Matthew John. "Local Adaptation of Microbial Communities along Geochemical Spatial Gradients in Sediments of the Lake Erie Region." Bowling Green State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1375187243.
Full textShannon, Andrew J. "Volcanic framework and geochemical evolution of the Archean Hope Bay Greenstone Belt, Nunavut, Canada." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/741.
Full textVeeger, Anne Isabella 1961. "Geochemical methods for evaluating the origin and evolution of ground water in volcanic rocks." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/191168.
Full textZhao, Rujian. "Paragenetic and geochemical evolution of the Cregganbaum gold prospect, Co Mayo, Republic of Ireland." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251921.
Full textTakazawa, Eiichi. "Geodynamic evolution of the Horoman peridotite, Japan : geochemical study of lithospheric and asthenospheric processes." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10667.
Full textHorning, Gregory (Gregory William). "Geophysical and geochemical constraints on the evolution of oceanic lithosphere from formation to subduction." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108908.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 104-115).
This thesis investigates the evolution of the oceanic lithosphere in a broad sense from formation to subduction, in a focused case at the ridge, and in a focused case proximal to subduction. In general, alteration of the oceanic lithosphere begins at the ridge through focused and diffuse hydrothermal flow, continues off axis through low temperature circulation, and may occur approaching subduction zones as bending related faulting provides fluid pathways. In Chapter 2 1 use a dataset of thousands of microearthquakes recorded at the Rainbow massif on the Mid-Atlantic Ridge to characterize the processes which are responsible for the long-term, high-temperature, hydrothermal discharge found hosted in this oceanic core complex. I find that the detachment fault responsible for the uplift of the massif is inactive and that the axial valleys show no evidence for faulting or active magma intrusion. I conclude that the continuous, low-magnitude seismicity located in diffuse pattern in a region with seismic velocities indicating ultramafic host rock suggests that serpentinization may play a role in microearthquake generation but the seismic network was not capable of providing robust focal mechanism solutions to constrain the source characteristics. In Chapter 3 I find that the Juan de Fuca plate, which represents the young/hot end-member of oceanic plates, is lightly hydrated at upper crustal levels except in regions affected by propagator wakes where hydration of lower crust and upper mantle is evident. I conclude that at the subduction zone the plate is nearly dry at upper mantle levels with the majority of water contained in the crust. Finally, in Chapter 4 I examine samples of cretaceous age serpentinite sampled just before subduction at the Puerto Rico Trench. I show that these upper mantle rocks were completely serpentinized under static conditions at the Mid-Atlantic Ridge. Further, they subsequently underwent 100 Ma of seafloor weathering wherein the alteration products of serpentinization themselves continue to be altered. I conclude that complete hydration of the upper mantle is not the end point in the evolution of oceanic lithosphere as it spreads from the axis to subduction.
by Gregory Horning.
Ph. D.
CHAKRABORTY, SUVANKAR. "THE GEOCHEMICAL EVOLUTION OF ALKALINE MAGMAS FROM THE CRARY MOUNTAINS, MARIE BYRD LAND, ANTARCTICA." Bowling Green State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1174187928.
Full textGoff, Kathleen Roselle. "Geochemical analysis of weathering zones from Clear Creek watershed: implications for modeling Quaternary landscape evolution." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5481.
Full textWeis, Dominique. "Geochemical evolution of the indian ocean mantle: dupal anomaly and role of the kerguelen plume." Doctoral thesis, Universite Libre de Bruxelles, 1992. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212956.
Full textSmithies, Robert Hugh. "The geochemical evolution of three alkaline complexes in the Kuboos-Bremen igneous province, southern Namibia." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005564.
Full textMannan, A. (Abdul). "Stratigraphic evolution and geochemistry of the Neogene Surma Group, Surma Basin, Sylhet, Bangladesh." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:9514267117.
Full textPimentel, Marcio Martins. "Late Proterozoic crustal evolution of the Tocantins Province in central Brazil : an isotopic and geochemical study." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280038.
Full textWong, Po-wan Kenny, and 王步雲. "Paleozoic tectonic evolution of the Chinese Altai Orogen: contraints from geochemical and geochronologic studies ofmafic rocks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44920878.
Full textRiter, Joyce Christine Alexis. "Geochemical and tectonic evolution of the Colorado Plateau mantle lithosphere : evidence from Grand Canyon mantle xenoliths /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Full textLeaver, Julie. "The petrological and geochemical evolution of the Late Proterozoic Lithospheric mantle below Seiland Province northern Norway." Thesis, University of Bristol, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296735.
Full textRicher, Mathieu. "Volcanic framework, geochronology and geochemical evolution of the El Dorado gold district, El Salvador, Central America." Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/32325.
Full textScience, Faculty of
Earth, Ocean and Atmospheric Sciences, Department of
Graduate
Garnaut, Kelli. "Geochemical classification of the mafics in the Granites-Tanami Inlier and their implications for the regions evolution /." Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09S.B/09s.bg234.pdf.
Full textAustralian National Grid reference The Granites Sheet (SF-52-3) 1:250 000. Includes bibliographical references.
Harris, Nancy Ruth 1970. "Isotopic, geochemical, and geochronological constraints on the origin and evolution of Cenozoic volcanism, Baikal Rift Zone, Siberia." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/54432.
Full textIncludes bibliographical references.
The Cenozoic Baikal Rift Zone, one of the world's major continental rifts, is expressed as an approximately 1800 km-long southwest-northeast oriented system situated along a suture between the Archean Siberian craton and younger Paleozoic fold belts. Oligocene to Recent age volcanic rocks and associated mantle xenoliths are distributed in three major regions of the rift zone: the Udokan volcanic field in the northeast, the Vitim volcanic field -200 km southeast of Lake Baikal, and a broad zone of volcanism to the southwest of Lake Baikal. This large-scale study investigates the geochemical evolution of the Baikal Rift Zone volcanism using major element, trace element, and isotopic (Sr, Nd, and Pb) geochemistry, as well as 40Ar/39Ar geochronology. In addition, a detailed isotopic study of megacrysts provides insight into the relationship between megacrysts and host lavas and the nature of the lithospheric mantle. Results of this study suggest that the source region for Baikal Rift Zone volcanic rocks is remarkably homogeneous considering the large region and time span over which these rocks erupted, and that crustal contamination has not been a significant controlling factor. The Tunka Basin, Oka Plateau, and Tuva volcanic fields in the western Baikal Rift Zone, and the Vitim volcanic field southeast of Lake Baikal, have a fairly restricted compositional range from basaltic andesite, alkaline basalt and hawaiite, to basanite and mugearite. In the Udokan volcanic field in the northeast, a more evolved series of rocks ranging to trachytic compositions erupted across the suture between the Archean craton and Paleozoic fold belts. Major and trace elements indicate that fractional crystallization of pyroxene, olivine, and plagioclase produced the observed range in compositions. The trace element and isotopic compositions of Baikal Rift Zone volcanic rocks are comparable to those observed in ocean island basalts. The Sr, Nd, and Pb isotope systematics can best be explained by mixing between the end-member mantle components DMM ( typical of the depleted source of MORB mantle) and EMI (enriched mantle type 1). Megacrysts of clinopyroxene, amphibole, garnet, biotite, and anorthoclase mirror the isotope systematics of the host volcanic rocks, and suggest that the megacrysts were derived from a melt closely related to their host rocks. Furthermore, megacrysts of clinopyroxene, as well as Cr-diopside from spinel lherzolites, have an unradiogenic Pb isotopic composition that may be representative of the EMI-like composition of the subcontinental lithospheric mantle.
by Nancy Ruth Harris.
Ph.D.
Tice, Peter. "Petrology and Geochemical Evolution of the East Hill Suite of the Mont Saint-Hilaire Alkaline Plutonic Complex." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1229.
Full textMathia, Eliza Joanna. "Geological evaluation of Posidonia and Wealden organic-rich shales : geochemical and diagenetic controls on pore system evolution." Thesis, University of Newcastle upon Tyne, 2015. http://hdl.handle.net/10443/2783.
Full textKülahci, Doğan Gullu Deniz. "Chronological, magmatological and geochemical study of post-collisional basaltic volcanism in Central Anatolia and its spatio-temporal evolution." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22593/document.
Full textThis thesis revealed the petrological and geochemical characterization of post-collisional Quaternary basalts of Central Anatolia (Erciyes and Hasandağ stratovolcanoes, and dispersed volcanisms of Obruk-Zengen and Karapınar), focusing on the spatiotemporal evolution of the magmatism in Cappadocia (Turkey). K-Ar geochronology indicated the coexistence of alkaline and calc-alkaline basalts from the same location and age. Moreover, the results also show that these basalts may be very young (a few thousand years). The mineralogy of Quaternary basalts from the Cappadocia is as follows: plagioclase, olivine, clinopyroxene, orthopyroxene and oxides (magnetite, ilmenite). Orthopyroxene is observed only in basalts of Erciyes, while it is lacking in Hasandağ and dispersed volcanisms of Obruk-Zengen and Karapınar. The plagioclase phenocrysts often exhibit disequilibrium features attributed to magma mixing process: complex zoning (normal, inverse, oscillatory), concentric zones rich in melt inclusions, resorption features. However, the observed mineralogy is consistent with a dominant fractional crystallization process. The estimated geobarometer show that the origin of magmas of Erciyes is shallower than the other settings. The results in geochemistry confirm not only the mineralogical duality between Erciyes and the other settings but also the coexistence of alkaline (normative nepheline) and calc-alkaline characters of contemporary basalts. All studied basalts are enriched in LREE (Light Rare Earth Elements) and LILE (Large Ion Lithophile Elements). The isotopic data (Sr, Nd, Pb, O) indicate the importance of enriched lithospheric source. All geochemical data also display the signature of other sources and processes such as contamination by the continental crust and heritage of a former subduction
Restrepo, Pedro Alonso. "Late Precambrian to Early Mesozoic tectonic evolution of the Colombian Andes, based on new geochronological geochemical and isotopic data." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187450.
Full textScherer, Hannah Howell. "Field, geochronologic, and geochemical constraints on the early mesozoic paleogeographic and tectonic evolution of the central Klamath Mountains, California /." May be available electronically:, 2006. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Full textMamberti, Marc. "Origin and evolution of two distinct Cretaceous oceanic plateaus accreted in Western Ecuador (South America) : Petrological, geochemical and isotopic evidence." Phd thesis, Université Joseph Fourier (Grenoble), 2001. http://tel.archives-ouvertes.fr/tel-00688387.
Full textStechern, André [Verfasser]. "Decoding magma plumbing and geochemical evolution of active volcanoes of the Central Andes (North Chile) with petrological methods / André Stechern." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2015. http://d-nb.info/1074968824/34.
Full textBarnes, Elspeth M. "The rare element Little Nahanni Pegmatite Group, NWT : studies of emplacement, and magmatic evolution from geochemical and Li isotopic evidence." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/27027.
Full textSimpson, Clayton A. "Constraints on proterozoic crustal evolution from an isotopic and geochemical study of clastic sediments of the Gawler Craton, South Australia /." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09SB/09sbs613.pdf.
Full textMap sheets: Lincoln (SI 53-11) 1:250 000 Tumby Bay (SI 53-6129) 1:100 000. Includes bibliographical references.
Anderson, Eric Douglas. "PETROLOGIC, GEOCHEMICAL, AND GEOCHRONOLOGIC CONSTRAINTS ON THE TECTONIC EVOLUTION OF THE SOUTHERN APPALACHIAN OROGEN, BLUE RIDGE PROVINCE OF WESTERN NORTH CAROLINA." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/820.
Full textBouilhol, Pierre. "Structural, petrological and geochemical constraints on transfer and evolution of arc magmas in the mafic-ultramafic Sapat Complex (Kohistan; Northern Pakistan) /." Zürich : Eidgenössische Technische Hochschule, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18081.
Full textGupta, K. D. "Tectono-stratigraphic evolution of deep-marine clastic systems in the Eocene Ainsa and Jaca basins, Spanish Pyrenees : petrographic and geochemical constraints." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1445277/.
Full textFoulkes, Susan Elizabeth. "New geochemical constraints on the genesis of the Gamsberg zinc deposit, Namaqualand Metamorphic Province, South Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1012084.
Full textZhang, Chao [Verfasser]. "Petrological, mineralogical and geochemical investigations of late Mesozoic magmatism in Eastern China : implications for tectonic evolution and crust-mantle interaction / Chao Zhang." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2012. http://d-nb.info/1024681157/34.
Full textMoore, Nicole E. DeBari Susan M. "Origin and geochemical evolution of mafic magmas from Mount Baker in the northern Cascade arc, Washington : probes into mantle and crustal processes /." Online version, 2010. http://content.wwu.edu/cdm4/item_viewer.php?CISOROOT=/theses&CISOPTR=345&CISOBOX=1&REC=14.
Full textWard, Emily Geraghty. "DEVELOPMENT OF THE ROCKY MOUNTAIN FORELAND BASIN: COMBINED STRUCTURAL, MINERALOGICAL, AND GEOCHEMICAL ANALYSIS OF BASIN EVOLUTION, ROCKY MOUNTAIN THRUST FRONT, NORTHWEST MONTANA." The University of Montana, 2007. http://etd.lib.umt.edu/theses/available/etd-09262007-094800/.
Full text