Thèses sur le sujet « Geochemical studies »
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Das, Nachiketa. « Geochemical studies of Caithness flags ». Thesis, University of Glasgow, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277227.
Texte intégralZeng, Yi-dong B. « Geochemical studies of microbial lipids ». Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235488.
Texte intégralMavrogenes, John Ashby. « Geochemical studies of earth materials ». Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/37460.
Texte intégralBray, Ian Stephen Johnson. « Geochemical methods for provenance studies of steatite ». Thesis, University of Glasgow, 1994. http://theses.gla.ac.uk/2735/.
Texte intégralJones, D. M. « Biodegradation of geochemical markers in pollution studies ». Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371787.
Texte intégralYendle, Peter W. « Chemometric studies of biochemical and geochemical systems ». Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.232950.
Texte intégralElliot, Trevor. « Geochemical indicators of groundwater ageing ». Thesis, University of Bath, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278513.
Texte intégralFeltham, David John. « Trace element studies by proton microprobe analysis ». Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258766.
Texte intégralElvy, Shane Brett, University of Western Sydney, Faculty of Science and Technology et School of Science. « Geochemical studies of base and noble metal compounds ». THESIS_FST_SS_Elvy_S.xml, 1998. http://handle.uws.edu.au:8081/1959.7/821.
Texte intégralDoctor of Philosophy (PhD)
Elvy, Shane Brett. « Geochemical studies of base and noble metal compounds / ». View thesis, 1998. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030821.172648/index.html.
Texte intégralCD-ROM (appendix) contains complete lists of the species distribution for each water sample; the constant correction spreadsheet; and, the possible stability constants for aqueous ionic species as well as the data ranges for both the Girilambone study and the North Mungana study. A thesis presented in accordance with the regulations governing the award of the degree of Doctor of Philosophy in the University of Western Sydney, Nepean, School of Science. Includes bibliographical references at end of each chapter.
Pelling, Richard. « Integrated geophysical - geochemical studies of the oceanic crust ». Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315093.
Texte intégralLofts, Jeremy C. « Integrated geochemical-geophysical studies of sedimentary reservoir rocks ». Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/35058.
Texte intégralSisson, Thomas W. « Field, geochemical, and experimental studies of aluminous arc magmas ». Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/58230.
Texte intégralWinterburn, Peter Alan. « Geochemical studies of peridotite xenoliths from southern African kimberlites ». Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/11595.
Texte intégralChabot, Nancy Lynne. « Geochemical studies of the cores of terrestrial planetary bodies ». Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/289052.
Texte intégralCrane, Martin John. « Geochemical studies of selected base metal minerals from supergene zone / ». View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030721.132607/index.html.
Texte intégral"A thesis presented in accordance with the regulations governing the award of the degree of Doctor of Philosophy, University of Western Sydney" "November 2001" Bibliography: leaves 249 - 254.
Abd-Alla, Mamdouh Ahmed. « Mineralogical and geochemical studies of tills in South-Western Scotland ». Thesis, University of Glasgow, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278221.
Texte intégralShukla, Balvinder. « Petrological, geochemical and palaeontological studies of the Lough Neagh Group ». Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238998.
Texte intégralWagner, Thomas Paul. « Experimental and geochemical studies of terrestrial and lunar magmatic process ». Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/57843.
Texte intégralIncludes bibliographical references (p. 153-156).
by Thomas Paul Wagner.
Ph.D.
Fotakis-Tsipouras, Constantine. « Geochemical exploration studies in the Lavrion (Laurium) area of Greece ». Thesis, University of Leicester, 1986. http://hdl.handle.net/2381/35027.
Texte intégralArno, Zachary. « Geochemical and Microbial Controls of Groundwater Quality in Northwestern Liberia ». Thesis, University of Nevada, Reno, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10634173.
Texte intégralYears of conflict, political instability, and national emergencies have left behind very little information on water resources in Liberia, West Africa. This research leverages major ion and trace element analysis, Escherichia coli (E. coli) field tests, and high-throughput sequencing of microbial 16S rRNA genes to address these gaps and develop a comprehensive snapshot of groundwater quality in the region surrounding Monrovia, the capital city. A novel protocol to collect and preserve microbial DNA from groundwater under tropical field conditions lacking a constant source of electricity was employed and yielded high quality DNA sequences of bacterial and archaeal phylogenetic marker genes.
Multivariate compositional data analysis methods were used to investigate geochemical processes impacting groundwater quality throughout the study area. Low conductivity, low pH groundwaters were found to dominate the system with the majority of geochemical variability in the water samples attributed to surficial inputs both natural and anthropogenic. The implicated low buffering capacity of the groundwater system suggests a high risk associated with mining operations in Liberia. From a public health perspective, nitrate contamination, attributed to widespread but localized infiltration of human and or animal waste/fertilizer(s), was identified as the most important chemical water quality issue. Sulfate was found to be indicative of urban water cycling processes.
Although nitrate, arsenic, and lead concentrations exceeded WHO guidelines in several wells, E. coli was identified in 39% of all groundwaters analyzed, suggesting fecal contamination as the most significant regional water quality risk to human health. Deeper wells had significantly (p < 0.05) lower probability of E. coli contamination, with no E. coli encountered in any well greater than 22 meters deep. Sequencing of 16S rRNA genes revealed highly variable microbial community compositions. Surficial inputs are suggested as the major drivers of microbial diversity and community composition. Groundwaters that tested positive for E. coli in the field were found to have significantly higher estimates of microbial alpha diversity (p < 0.05) than groundwaters that tested negative. Additionally, nitrate, silica, pH, and several other geochemical constituents were found to be strongly correlated with shifts in microbial community structure.
The identification of a wide diversity of pathogen-associated bacteria to the genus and species level suggests that microbial contamination is more widespread than indicated by the E. coli field test alone. Results highlight the vulnerability of aquifers in Liberia to contamination and call for an increased investment in the water supply infrastructure and enhanced monitoring of chemical and microbial constituents throughout the country. This work will help the government of Liberia establish baseline water-quality conditions and provides an initial set of water resource databases to improve water-quality monitoring capacity.
Crane, Martin John, University of Western Sydney, of Science Technology and Environment College et of Science Food and Horticulture School. « Geochemical studies of selected base metal minerals from the supergene zone ». THESIS_CSTE_SFH_Crane_M.xml, 2001. http://handle.uws.edu.au:8081/1959.7/232.
Texte intégralDoctor of Philosophy (PhD)
Bowtell, Sophie Ann. « Geochronological and geochemical studies of Zermatt-Saas Fee Ophiolite, Western Alps ». Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305487.
Texte intégralSnape, J. F. « Studies of the petrologic and geochemical diversity of the lunar regolith ». Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1381931/.
Texte intégralChapman, Paul. « Geochemical and mineralogical studies of the weathering of Silurian argillaceous rocks ». Thesis, Bangor University, 1986. https://research.bangor.ac.uk/portal/en/theses/geochemical-and-mineralogical-studies-of-the-weathering-of-silurian-argillaceous-rocks(6c031611-9af6-4a62-a663-d76c9cd5ad94).html.
Texte intégralKadem, Liftaa Selman. « Sedimentological, mineralogical and geochemical studies of Holocene coastal sediments, south western Scotland ». Thesis, University of Glasgow, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287730.
Texte intégralWareham, Christopher Desmond. « Isotopic and geochemical studies of a Pliocene porphyry-mo system, Rico, Colorado ». Thesis, University of Aberdeen, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304968.
Texte intégralCundy, Andrew Brian. « Radionuclide and geochemical studies of recent sediments from the Solent estuarine system ». Thesis, University of Southampton, 1994. https://eprints.soton.ac.uk/50591/.
Texte intégralMello, Marcio Rocha. « Geochemical and molecular studies of the depositional environments of source rocks and their derived oils from the Brazilian marginal basins ». Thesis, University of Bristol, 1988. http://hdl.handle.net/1983/a29755bf-1342-4601-8c5a-23849275f37c.
Texte intégralCosta, Mafalda. « A geochemical approach to the study of archaeological glassy materials ». Doctoral thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/29209.
Texte intégralZhang, Xiping. « Geochemical exploration for polymetallic ores in volcano-sedimentary Rocks : studies in China and Finland / ». Oulu : Oulun Yliopisto, 2000. http://herkules.oulu.fi/isbn9514257871.
Texte intégralGaab, Andreas S. « Isotope geochemical and geochronologic studies of basement units in the Central Western Carpathians (Slovakia) ». [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975961136.
Texte intégralHay, Susan Vivienne. « Some geochemical and isotopic studies of the Insch, Huntly and Belhavie intrusions, NE Scotland ». Thesis, Royal Holloway, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271593.
Texte intégralDiskin, Sorcha. « Isotopic and geochemical aids to provenance studies in the Westphalian of the British Isles ». Thesis, Oxford Brookes University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271276.
Texte intégralLee, Kwok-Lin. « Petrological and geochemical studies of an abyssal periodotite from the Atlantis II fracture zone ». Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/54425.
Texte intégralAḥmad, Naz̲īr. « Palaeoenvironments, diagenesis, and geochemical studies of the Dungan Formation (Palaeocene), eastern Sulaiman Range, Pakistan ». Thesis, University of Leicester, 1996. http://hdl.handle.net/2381/34934.
Texte intégralHagen, Erik Harold. « Geochemical studies of Neogene Till in the Transantarctic Mountains : evidence for an extraterrestrial component ». The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406893208.
Texte intégralMcCoyd, Richard James. « Isotopic and geochemical studies of the epithermal-mesothermal Pb-Zn deposits of S.E. Bulgaria ». Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU551163.
Texte intégralTheander, Astrid. « Mapping of contaminant dispersion from a polluted mining area by geochemical and geophysical methods, Rävlidmyran,northern Sweden : Use of geochemical and geophysical studies to investigate contaminants ». Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-73634.
Texte intégralEfter brytning ur ett dagbrott, så kan dagbrotten ur efterbehandlingssyfte till exempel bliåterfyllt med antingen gråberg eller med vatten. Ifall dagbrottet blir återfyllt med vattenoch en dagbrottssjö skapas, så tenderar denna sjö att vara försurad och innehålla förhöjdahalter av metaller. Detta ökar de lokala belastningarna på miljön i området. En av dessadagbrottssjöar är Rävlidmyran som ligger i Skelleftefältet. Denna dagbrottssjö och dessbieffekter har skapat syftet med detta examensarbete, vilket är att jämföra olikavattentyper kopplade till Rävlidmyran (grundvatten, ytvatten och vatten i dagbrottssjön)samt att jämföra geokemin med geofysiska mätningar. Syftet är också att jämföramolkvoter mellan relevanta element för att i sin tur få mer geokemisk information.För att få fram mer information om grundvatten så har flertalet grundvattenrörinstallerats i området sen flera år tillbaka. Därefter har grundvattnet provtagits ochanalyserats regelbundet. Ytvattnet i området har också provtagits. I dagbrottssjön har enprofil tagits fram genom att ta vattenprover på olika djup i sjön. De geofysiskamätningarna som gjorts är resistivitet och inducerad potential mätningar, samtmätningar som utförts med slingram-metoden.Vattenprovtagningarna indikerade att alla tre vattentyper innehåller förhöjda halter avmetaller. Molkvoten (Cu+Zn+Pb)/Na visade att kvoten var högst under kemoklinen idagbrottssjön i jämförelse med de andra två vattentyperna. De kemiska analyserna avvattenproverna av de olika vattentyperna pekade också på att vattnet under kemoklineni dagbrottssjön innehöll en större mängd lösta joner. Kvoten Fe/S var också högst i dettavatten. När det kommer till molkvoten som bland annat representerar gipsutfällning ochgipsupplösning – Ca/S – så var det under 1 i hela området, med undantag för tvågrundvattenrör. Kvoten (Ca+Mg)/Na var högst i dagbrottssjön och det indikerarupplösning av exempelvis karbonater. Detta är inte helt oväntat, då dagbrottssjön kalkatsregelbundet sedan en lång tid tillbaka.De geofysiska utredningarna indikerade på förhöjd elektrisk konduktivitet i ettgråbergsupplag nordväst om dagbrottssjön, där vattenanalyserna påvisade en förhöjdkoncentration av koppar. Mätningarna visade även att grundvattnets riktning var motsjön Hornträsket, som är lokaliserad norr om dagbrottssjön. De indikerade ävenpotentiella flödesvägar för grundvatten. Dessa flödesvägar kan innehålla förhöjda halterav metaller, vilket kan bekräftas med hjälp av provtagningar av grundvatten i området.Från de geofysiska mätningarna är det också möjligt att se att en av profilerna är placeradlängs med en möjlig grundvattenplym, baserat på en låg resistivitet och den potentiellaplymens form.
Thomas, Mark W. « Geochemical Modeling of CO2 Sequestration in Dolomitic Limestone Aquifers ». Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3708.
Texte intégralSmith, Jennifer Mae. « Geochemical signatures in the coral Montastraea modern and mid-Holocene perspectives / ». [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001593.
Texte intégralMavromatis, Vasileios [Verfasser]. « Mineralogical and isotope geochemical investigations of high Mg-calcites : laboratory and field studies / Vasileios Mavromatis ». Kiel : Universitätsbibliothek Kiel, 2010. http://d-nb.info/1020002840/34.
Texte intégralDolgopolova, Alla V. « Geochemical and isotope studies of element dispersal in the environment during mining and ore processing ». Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/11999.
Texte intégralGeng, Hongyan, et 耿红燕. « Geochemical and geochronological studies of carboniferous magmatism inthe West Junggar : ridge subduction in thelate paleozoic ? » Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45983999.
Texte intégralMercone, Domenico Carlo. « High-resolution geochemical studies on the most recently-accumulated sapropel S1 in the eastern Mediterranean ». Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/42140/.
Texte intégralGarcia, Susana. « Experimental and simulation studies of iron oxides for geochemical fixation of CO2-SO2 gas mixtures ». Thesis, University of Nottingham, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523076.
Texte intégralLazareva, Olesya. « Detailed geochemical and mineralogical analyses of naturally occurring arsenic in the Hawthorn Group ». [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000521.
Texte intégralWong, Po-wan Kenny, et 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.
Texte intégralViskupic, Karen M. (Karen Marie) 1975. « Crustal melting in the Himalayan orogen : field, geochemical and geochronological studies in the Everest region, Nepal ». Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/59101.
Texte intégralIncludes bibliographical references.
A combination of field studies and geochemical techniques were used to investigate the timing and processes involved in leucogranite generation in the Everest region of the Himalayan orogen. Geochemical investigations focused on samples from three outcrops at different structural levels in the Himalayan metamorphic core where in situ crustal melting and multiple generations of leucogranite intrusions were observed. Accessory phase thermochronological and U-Pb geochronological studies were combined to determine the timing of anatexis in a migmatite at the structurally lowest outcrop. Quantitative measurement of REE and Y in monazites and xenotimes, that were later dissolved and dated by U-Pb IDTIMS, revealed monazite growth at temperatures appropriate for crustal melting (>650⁰C) between 25.4 and 24.8 Ma, suggesting that anatexis was ongoing at that time. Further constraints were placed on the timing of crustal melting, granite crystallization and cooling with a detailed U-Pb IDTIMS and 40Ar/39Ar study of leucogranite dikes, sills, and the metamorphic rocks they intrude. Backscattered electron imaging of accessory minerals provided important insights into the petrogenesis of monazite, xenotime and zircon, and guided efforts to isolate accessory phase growth domains. In two granitic sills, extensive accessory phase crystallization between ca. 26 and ca. 23 Ma was interpreted to be the result of episodic to semi-continuous melt generation and crystallization at least between those times. These melt products were later entrained in melts that crystallized as syntectonic sills at 21-22 Ma. Younger crosscutting dikes crystallized between 17.5 and 18.3 Ma.
(cont.) The range in accessory phase dates from these dikes and sills that represent magmatic crystallization ages spans from 26.2 to 17.5 Ma, providing evidence for melt generation in one region over roughly 9 million years. Neodymium isotopic signatures of the same monazite and xenotime grains dated by U-Pb IDTIMS were used to investigate melting processes and granite source-rock characteristics. The dominant control of monazite on the Nd isotopic composition of its host rock was clearly demonstrated. Some Nd isotopic heterogeneities recorded in monazite and in xenotime support a model for melt generation where accessory phases grow from locally derived sources in an isotopically heterogeneous melt.
by Karen M. Viskupic.
Ph.D.
Jorquera, Zuniga Carmina Olivia. « Geochemical baselines based on stream waters : applications to environmental studies, Central Chile as a case study ». Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/28149.
Texte intégral