Dissertations / Theses: 'Rocks, Igneous'

1

Esfarjani, H. R. "Engineering properties of basic igneous rocks." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374739.

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Reichow, Marc K. "Permo-Triassic igneous rocks of Siberia, Russia." Thesis, University of Leicester, 2004. http://hdl.handle.net/2381/7669.

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Widespread basaltic volcanism occurred in the region of the West Siberian Basin (WSB) and the Taimyr Peninsula in central Russia, and voluminous A-type magmatism within the Mongolian-Transbaikalian belt in southeast Siberia, during Permo-Triassic times. New 40Ar/39Ar age determinations on plagioclase grains from deep boreholes in the WSB reveal that the basalts were erupted at ~250 million years ago. This is synchronous with the main period of the Siberian Traps volcanism, which was located farther east. The age and geochemical data presented confirm that the WSB basalts are part of the Siberian Traps, and at least double the confirmed area of the volcanic province as a whole. The larger area of volcanism strengthens the link between the volcanism and the end-Permian mass extinction. Furthermore, it is argued that the WSB and Taimyr basalts are genetically related to the Siberian Traps basalts, especially the Nadezhdinsky Suite found at Noril’sk. This suite immediately preceded the main pulse of volcanism that extruded lava over large areas of the Siberian Craton. Magma volume and timing constraints strongly suggest that a mantle plume was involved in the formation of the Earth’s largest continental flood basalt province. The Mongolian-Transbaikalian granitoid belt covers over 600,000 km2 with over 350 single A-type plutons. New U-Pb geochronological data presented here demonstrate that no plutonic complex dated is 250 Ma old. Although mantle-derived material played a prominent role in the granitoid generation, these melts may have been generated by processes other than decompressional melting within the head of a mantle plume. The new U-Pb ages and other observations contradict the idea of a relation between the Siberian plume and magmatic activity in the territory of Transbaikalia. An alternative preferred model inducing up rise of asthenospheric material includes slab break-off after a long period of subduction.

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3

Chan, Heung-ngai. "Igneous and metamorphic rocks from SW Cyprus and NW Syria evidence for Cretaceous microplate collision and subsequent tectonic events in the Eastern Mediterranean /." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30711940.

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4

Chen, Qinfang. "Geophysical and radiometric investigation of weathered igneous rocks in Hong Kong /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23621497.

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5

Riter, 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.

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6

Pattie, Andrew J. D. "Hybridization of basic wall rocks in xenolithic igneous complexes." Thesis, Aston University, 1989. http://publications.aston.ac.uk/14371/.

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7

Lee, Paula M. "Spatial, temporal, and petrogenetic relationship of basaltic and lamprophyric dikes and sills of the Raton Basin, southern Colorado and northern New Mexico." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/5848.

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Thesis (M.S.)--University of Missouri-Columbia, 2005.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (July 11, 2006) Includes bibliographical references.

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Getson, Jacqueline. "Effect of plagioclase crystallization on liquid and magma viscosity in the Anorthite-diopside-dorsterite-quartz system." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4628.

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Thesis (M.S.) University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (June 25, 2007) Includes bibliographical references.

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9

Rabae, Abdussalam. "Geophysical investigations of the Anglo-Brabant Massif." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386227.

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10

Jarvis, Richard Allan. "Crystallization and melting in geological fluid mechanics." Thesis, University of Cambridge, 1991. https://www.repository.cam.ac.uk/handle/1810/275236.

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La, Rocque Cynthia A. "Geochronology and petrology of north-central Gaspe igneous rocks, Quebec." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65499.

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12

Hole, Malcolm John. "Time controlled geochemistry of igneous rocks of the Antarctic Peninsula." Thesis, Royal Holloway, University of London, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423458.

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Four distinct groups of intrusive rocks have been identified within Graham Land, northern Antarctic Peninsula. Each Group is defined on the basis of age, Sr-, Nd- and a-isotopic and trace element geochemical signatures. Group I intrusions are dominantly Tertiary and are geographically restricted to the W coast of the Peninsula, and exhibit low initial e7Sr/e6Sr and high initial 14~Nd/144Nd ratios (0.7038 - 0.7045 and 0.51280 0.51277). Group I intrusions possess the lowest LIL/HFS ratios of any Group with Th/Ta and La/Ta ratios similar to N-type MORB, and may exhibit a distinct alkaline affinity; they are considered to have been emplaced during a Tertiary supra-subduction zone extensional episode. Cretaceous Group II granitoids crop out throughout Graham Land. Group III and IV granitoids range from late Triassic - Jurassic and are restricted to central eastern Graham Land and SE Graham Land respectively. Sr- and Nd-isotope characteristics of Group III and IV intrusions are consistent with base of crust (~35 Km) interaction between a mantle derived magma and pre-TriaSSiC, but not necessarily ancient, continental crust. Group III granitoids possess consistent e7Sr /e6Sr and 14~Nd/144Nd ratios (0.7060 - 0.7070 and ~ 0.5123 respectively). Group IV intrusions are more highly contaminated (initial e7Sr /e6Sr and 14~Nd/144Nd ratios 0.7078 - 0.7162 and 0.5123 - 0.5120 respectively), and were probably intruded through thicker crust than Group III. LIL/HFS and LREE/HREE ratios increase with increasing degrees of contamination.- Isotope and trace element characteristics of Antarctic Peninsula intrusions reflect changes in tectonic regime with time; pre-Triassic tectonic segmentation of Graham Land resulted in the varying degrees of contamination of Groups III and IV, while syn-subduction extension resulted in the emplacement of isotopically uncontaminated Group I intrusions, with calc-alkaline to alkaline affinities.

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13

Macdonald, Raymond. "Petrological studies of igneous rocks, mainly from continental extensional zones." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/12500.

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14

Lang, James Robert. "Isotopic and geochemical characteristics of Laramide igneous rocks in Arizona." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185600.

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Isotopic and trace element data on igneous rocks in nine multiphase magmatic complexes of Laramide age in Arizona place constraints on their petrogenesis and on the factors leading to the formation of porphyry copper deposits. The igneous rocks form a data array from ∊Nd(T) and Srₒ values of 0 and 0.704, to -14 and >0.710, respectively. Isotopic compositions indicate that early, intermediate volcanic rocks retained a mantle component whereas later intrusions were derived predominantly from Precambrian lower crust. The REE display temporally systematic behavior. Progressively younger igneous rocks in a district show a decreasing concentration of REE which is more pronounced for the HREE than for the LREE; they acquire greater upward concavity in their HREE profiles; and the Eu anomaly steadily becomes less negative. An increasing role for hornblende is indicated, either in the residuum of melting or as a fractionating phase. The evolving REE and isotopic behavior parallels the progression from barren, to subproductive, to productive intrusions. The geochemical behavior can be understood in the broader context of magmagenesis at the Laramide convergent margin. Early in the Laramide, the crust was cool and brittle, thereby allowing magmas formed in the mantle wedge as a consequence of volatile loss from the descending slab to ascend to high crustal levels. As the crust warmed the ascent of mantle-derived magmas was arrested in the lower crust where they induced anatexis in Precambrian crust. Three related models can account for the systematic REE behavior, crustal anatexis, and the timing of Laramide metallogenesis: (1) metasomatism of the lower crust, (2) progressively greater assimilation of hydrous crust by mantle-derived melts, and (3) migration of the anatectic zone into more hydrous rocks at higher crustal levels. Each process would allow melting to continue in confined columns of crust as well as provide increasingly volatile-rich magmas that were necessary for melts to evolve fluids capable of forming large porphyry copper deposits. The ultimate ability of a melt to form a porphyry copper deposit may, therefore, depend on characteristics obtained either in its crustal source region or during its passage through the crust.

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15

Marchand, Kateri. "Étude d'éléments structuraux dans la demie nord du Canton de McKenzie, Chibougamau /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1990. http://theses.uqac.ca.

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16

Mainville, Michèle. "Les komatiites et tholéiites à la base du groupe de baby, Témiscamingue /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1994. http://theses.uqac.ca.

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17

Pattison, Christopher Ian. "Igneous intrusions in the Bowen Basin." Thesis, Queensland University of Technology, 1990. https://eprints.qut.edu.au/35967/1/35967_Pattison_1990.pdf.

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Igneous intrusions, in the form of stocks, sills and dykes are abundant in the Bowen Basin. They are predominantly Early Cretaceous in age, exclusively epizonal in origin and range in composition from dolerite to granodioriteldacite. All rock units within the basin, up to and including the Clematis Group, are intruded to some degree. This study assesses the distribution, form, petrology and mode of emplacement of plutons, igneous sills and dykes occurring in the Bowen Basin, and considers their relationship to the prevailing structure. The tectonic implications of the findings are then assessed. Igneous sills occur in two geographically distinct domains, one in the northern Bowen Basin and the other in the central Bowen Basin. The sills emanated from pre-existing, north to north-northwest trending reverse faults, and preferentially intruded coal seams. The boundaries to sill intrusion are marked by major northeast trending basement structures. These basement structures occur at regular intervals throughout the basin, and correspond with the localisation of plutonic and dyke activity, anomalous structural disturbance, and changes in the gross structure of the basin. They are interpreted as transfer faults that were inherited from an Early Permian, basin-forming extensional episode. Petrological evidence indicates that the plutons and sills occurring in the northern Bowen Basin are petrogenetically related, and that a progressive variation in their chemistry occurs across the axis of the basin from east to west. Intrusions in the east belong to the calc-alka1ine rock suite, while those in the west belong to the syenitic suite. This transition is inte1preted in terms of increased crustal contamination as the magma migrated from a source area to the east along a buried, shallow-dipping detachment surface that extends under the basin. This detachment was inherited from the above mentioned extensional phase and is intimately linked to structures that penetrate up-section through the basin succession. Reactivation of the transfer faults during the Early Cretaceous initiated the emplacement of dykes, and the synchronous development of northeast trending normal and wrenchstyle faults. The dykes exhibit characteristics that indicate they were self-propagating, and can be regarded as good palaeostress indicators. This phase corresponded with a major compressional event that involved the reactivation of pre-existing thrust structures, deformation of the Folded Zone and eastern margins of the Nebo Synclinorium and Mimosa Syncline, and the rapid preferential uplift of the central Bowen Basin region.

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18

Vieira, Nuno Manuel Martinho. "Petrologia e aspetos geoquímicos das rochas ácidas do tipo Palmas e Chapecó da Província Magmática do Paraná /." Rio Claro, 2017. http://hdl.handle.net/11449/151077.

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Título: Petrologia e aspetos geoquímicos das rochas vulcânicas ácidas tipo Palmas e Chapecó da província magmática do Paraná
Orientador: Antonio José Ranalli Nardy
Banca: João Manuel Lima da Silva Mata
Banca: Fábio Braz Machado
Resumo: As rochas ácidas da Província Magmática do Paraná (PMP) cobrem cerca de 2,5% do volume total do vulcanismo intracontinental ocorrido durante o Cretáceo Inferior, o que levou à abertura do Atlântico Sul. As análises petrográficas e o estudo da química mineral dos principais constituintes minerais, plagioclásio, piroxênio (orto e clino) e Ti-magnetita, das rochas ácidas do tipo Palmas (ATP) e ácidas tipo Chapecó (ATC), permitiram obter dados inéditos e correlacionar, com maior rigor, os vários magmas-tipo que essas rochas geraram. Foi possível descriminar a mineralogia distinta do grupo Palmas, ao que diz respeito aos cristais de piroxênio, assim como as heterogeneidades geoquímicas deste mesmo grupo e de Chapecó. Ortopiroxênio é exclusivo das rochas ATP e especificamente do magma-tipo Caxias do Sul. Os clinopiroxênios, pigeonita e augita são comuns em todos os subtipos das ácidas, porém, esta última está ausente da associação mineralógicas das rochas do magma-tipo Santa Maria (ATP). Com o estudo detalhado da relação mineralógica entre os cristais permitiu inferir sobre a sequência de cristalização dos piroxênios e, por conseguinte das rochas tipo Palmas. As feições texturais, dados de química mineral e (raros) de geotermobarometria obtidos nas rochas ATP e ATC sugerem que os minerais presentes nestas rochas não estão em equilíbrio com o líquido que gerou a rocha hospedeira. As feições petrográficas encontradas nos cristais de piroxênio e plagioclásio, tais como, bordas corroíd... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The acid rocks of the Paraná Magmatic Province (PMP) cover about 2.5% of the total volume of intracontinental volcanism that occurred during the Lower Cretaceous, which led to the opening of the South Atlantic. Petrographic analyzes and the study of mineral chemistry of the main Palmas acid type (ATP) and Chapecó acid type rocks (ATC), made it possible to obtain unpublished data and correlate, with greater rigor, the various types of magmas these rocks generated. It was possible to discriminate the mineralogy distinct from the Palmas group, as regards the pyroxene crystals, as well as the geochemical heterogeneities of this group and Chapecó group. Orthopyroxene crystals are unique to ATP rocks and specifically to the Caxias do Sul magma-type. Clinopyroxenes crystals, pigeonite and augite, are very common in all acidic subtypes, but the latter is absent from the mineralogical association of the Santa Maria magma-type rocks (from ATP). With the detailed study of the mineralogical relationship between these crystals allowed us to infer about the crystallization sequence of the pyroxenes and, consequently, of the Palmas group. The textural features, mineral chemistry data and (rare) geothermobarometry data obtained in the ATP and ATC rocks suggest that the minerals present in these rocks are not in equilibrium with the liquid that generated the host rock. The petrographic features found in pyroxene and plagioclase crystals, such as corroded edges, corona and matrix impregnation,... (Complete abstract click electronic access below)
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Chiang, Kai Kim. "The geochemistry of Cenozoic igneous rocks of Borneo and tectonic implications." Thesis, Royal Holloway, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399226.

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陳琴芳 and Qinfang Chen. "Geophysical and radiometric investigation of weathered igneous rocks in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31242947.

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21

Barker, Aaron Robert. "Predicting alluvial reservoir development and drainage distribution during mid to late large igneous province formation." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231017.

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This research aims to better understand drainage systems during mid to late Large Igneous Province (LIP) formation. A multidisciplinary study was conducted on the Lewiston Basin in the Columbia River Flood Basalt Province and the Skye Lava Field in the North Atlantic Igneous Province. A general model for drainage systems in LIPs was developed with three stages. In the early-LIP stage, the volcanic and drainage systems are confined to small basins, but as the volumetric eruption rate increases the regional drainage system is forced to the edge of the lava field. During the mid-LIP stage, the eruption rate decreases and the drainage system moves into the lava field, depositing channel sediments in the lowest parts of province while finer sediments or palaeosols develop in topographically higher areas. In the Skye Lava Field the drainage system was dominated by the uplift of the Rum Central Igneous Complex and included the incision of shallow valleys, whereas in the Lewiston Basin the most important effect was the structural control on basin topography. During the lateLIP stage, topographically high areas experience significant incision into the lava field which are filled by intracanyon flows (thick canyon-filling lava flows). These intracanyon flows may compartmentalise potential reservoirs deposited between earlier lava flows. Siliciclastic sand bodies were observed up to 12 m thick and 850 m across with minor exposure gaps, and were correlated across up to 15 km. The palynofloras associated with a number of palaeoenvironments in each province were identified the effects of other controls on the palaeoecology such as moisture availability, ashfall and substrate were established. The changes in the paJaeoclimate of the Lewiston Basin were studied using palaeosol geochemistry and palynology.

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22

Gallagher, Brookie. "A comparative study of the Badger Pass igneous intrusion and the foreland volcanic rocks of the McDowell Springs area, Beaverhead county, Montana implications for the local late cretaceous sequence of events /." unrestricted, 2008. http://etd.gsu.edu/theses/available/etd-04212008-172506/.

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Thesis (M.S.)--Georgia State University, 2008.
Title from file title page. Timothy E. LaTour, committee chair; Hassan A. Babaie, Eirik J. Krogstad, William J. Fritz, committee members. Electronic text (111 p. : ill. (some col.), maps (some col.)) : digital, PDF file. Description based on contents viewed Aug. 20, 2008. Includes bibliographical references (p. 100-104).

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23

Huang, Kuan. "Geological studies of igneous rocks and their relationships along the Kyrenia Range, Northern Cyprus." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/b40204030.

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24

Church, Abigail Ann. "The petrology of the Kerimasi carbonatite volcano and the carbonatites of Oldoinyo Lengai with a review of other occurrences of extrusive carbonatites." Thesis, University College London (University of London), 1996. http://discovery.ucl.ac.uk/1349623/.

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Extrusive carbonatites are rare igneous rocks with just 37 known localities. The majority are calciocarbonatites, the principal exception being those of the active volcano, Oldoinyo Lengai, which are strongly alkaline. Unresolved questions concerning extrusive carbonatites include: 1. Why are extrusive carbonatites at Lengai chemically different from all others? 2. Could the extrusive calciocarbonatites originally have had alkaline compositions? In order to address these questions extrusive carbonatites from both Lengai and the adjacent volcano, Kerimasi, were collected and compared. A compilation of all the available data on known extrusive carbonatites is also presented. The major results documented in this thesis are: 1. Alkali carbonatites from Oldoinyo Lengai erupted in 1993 contain petrographic evidence for an origin by liquid immiscibility from a highly fractionated peralkaline silicate melt (wollastonite nephelinite). 2. The suite of silicate rocks at Kerimasi are derived from a primary olivine nephelinite by fractional crystallisation and cumulus processes. 3. Extrusive carbonatites at Kerimasi are not genetically related to the silicate suite. By contrast intrusive sovites also present, originated by liquid immiscibility from a primitive silicate magma, equivalent to a melilite, nephelinite, at low pressure. 4. Extrusive calciocarbonatites from Kerimasi were erupted directly from the mantle. They contain phenocrysts (previously interpreted as pseudomorphs after alkali carbonate) which are now thought to have been dolomite containing calcite exsolution lamellae. 5. Of the 35 other extrusive carbonatite occurrences, none show any petrographic or geochemical evidence of having originally being alkaline. Therefore extrusive carbonatites from Oldoinyo Lengai are thought to be unique. 6. Of the 37 extrusive carbonatites, 50% are associated with melilitites or melilitebearing rocks, 27% are associated with nephelinites and the remaining 23% were erupted with no associated silicate magmas.

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Moore, Kathryn Ruth. "Melting of a carbonated mantle." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285716.

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Potgieter, J. E. "Anorogenic alkaline ring-type complexes of the Damaraland Province, Namibia, and their economic potential." Thesis, Rhodes University, 1987. http://hdl.handle.net/10962/d1001567.

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Anorogenic alkaline ring-type complexes form within continental plate settings. Alkaline magmatism is derived from the upper mantle, in which mantle metasomatism plays an important part, as well as from partial melting of the lower crust. Radial and concentric fractures develop during the ascent of alkaline magma. Extrusion of basic and felsic magma takes place along these fractures with felsic volcanics building-up central volcanoes. As a result of emptying of the magma chamber, the superstructure of the volcano collapses and a caldera is formed. During the caldera stage syenitic and granitic material are intruded into ring fractures. Alkaline ring-type complexes may be classified as (i) alkaline qranite and syenite-type and (ii) carbonatite and undersaturated-type. These ring-type complexes occur as distinct igneous provinces. Some major provinces occur in Brazil, Corsica, Namibia, Nigeria, Norway, Saudi-Arabia and Sudan. In Namibia the Damaraland igneous province is of Mesozoic aqe and it contains 15 alkaline ring-type complexes . These complexes are situated along north-eastern trends which correspond to transform directions of the South Atlantic. During the opening of the South Atlantic (Gondwana breakup) Pan-African age lineaments were reactivated which allowed emplacement of anorogenic alkaline magmatism. A zonation of alkaline granite and syenitetype in the west and carbonatite and undersaturated-type ring-complexes in the east correlates with down- and upwarp axes parallel to the line of Gondwana fragmentation. Alkali- and H⁺-metasomatism is related to the alkaline and syenite-type whereas alkali metasomatism (fenitization) is associated with carbonatite and undersaturated-type ring-complexes. Sn, W and Ta mineralization is associated with alkaline granites of some of the alkaline granite and syenite-type ring-complexes. Fe, F, PO₄ , Nb, Th, REE, Sr, Zn and Pb mineralization is associated with carbonatite complexes. Potential exists for: (i) porphyry Cu-Mo and epithermal-type (Au, Ag, Pt-metals, base metals) mineralization in the alkaline granite and syenite-type ring-complexes and (ii) disseminated Cu, Au, Aq and Pt-metals in carbonatite and undersaturated-type ring-complexes

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Chan, Heung-ngai, and 陳向毅. "Igneous and metamorphic rocks from SW Cyprus and NW Syria: evidence for Cretaceous microplate collision andsubsequent tectonic events in the Eastern Mediterranean." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30711940.

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Pilote, Pierre. "Stratigraphie et significations des minéralisations dans le secteur du mont Bourbeau, canton de McKenzie, Chibougamau /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1986. http://theses.uqac.ca.

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Mémoire (M.SC.A.)--Université du Québec à Chicoutimi, 1986.
"Mémoire présenté en vue de l'obtention de la maîtrise en sciences de la terre" Cartes contenues dans une pochette. CaQCU CaQCU Document électronique également accessible en format PDF. CaQCU

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Joyner, Louise. "The geochemistry and crystallisation history of pyroxenes from hypabyssal basic igneous rocks." Thesis, University of Portsmouth, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358001.

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Hastie, Alan Robert. "Tectonomagmatic evolution of the Caribbean plate : insights from igneous rocks on Jamaica." Thesis, Cardiff University, 2007. http://orca.cf.ac.uk/54589/.

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The identification of post-Jurassic arc and plateau rocks in Jamaica has helped constrain the tectonic evolution of the Caribbean plate by identifying when, where and how the different volcanic rocks formed. This research therefore not only evaluates the existing models of Caribbean plate evolution, it also presents for the first time, a detailed gcochcmical and geochronolgical analysis of the igneous rocks on Jamaica. This study has focussed on the igneous rocks of the Blue Mountains, Central, Above Rocks and Benbow Cretaceous Inliers and the Tertiary Wagwater belt. Major and trace element data, Sr, Nd, Pb and Hf isotope analysis and argon radiometric ages have confirmed the presence of a Cretaceous oceanic plateau section within the Blue Mountains inlier and a number of primitive and evolved Cretaceous island arc sequences in the remaining inliers. Rare high-Nb basalts (HNB) and adakites have also been discovered in the Tertiary Wagwater belt. Many elements have been mobilised because of intense tropical weathering, and so the tectonic setting and petrogenesis of most of the analysed samples were interpreted using immobile trace elements which has led to the development of the Co- Th, Th/Zr-La/Yb. Cc/Lu-Sm/Yb, La'Hf-Sm/Y and Th/Hf-Sm/Yb discrimination diagrams. These diagrams have been used to classify the Jamaican volcanic arc rocks and thus identity their extent of fractionation and incompatible trace element enrichment. Immobile trace element and isotope geochemistry has identified at least 5 mantle wedge components and 8 slab components in the Jamaican island arc rocks. Additionally, the Bath-Dunrobin plateau lavas, the adakites and the HNBs represent at least three other chemically distinct source regions. The Bath-Dunrobin plateau lavas are derived from a - 90 Ma heterogeneous mantle plume source region which is distinct from the source regions for other Caribbean oceanic plateau lavas as it contains a larger HIMU component giving it more radiogenic Pb isotope ratios. The adakites have been derived from the combination of complex post-eruptive alteration, partial melting, fractional crystallisation and hybridisation processes. Rather than being related to a melt from a subducting slab, the Jamaican adakites appear to be derived from a melt of lower crustal garnet amphibolite with inter-bedded sedimentary material. The HNBs are derived from a HIMU-type source, which contained garnet and amphibole and so is distinct from the source region of the oceanic plateau. Using the new geochemical and geochronological data, together with the stratigraphic information and temporal location of the Jamaican igneous rocks, it is possible to place Jamaica in the Pacific model of Caribbean plate evolution. From 120- 75 Ma Jamaica formed the northernmost part of the Great Arc of the Antilles and erupted bimodal tholeiitic and calcalkaline magmas, which eventually evolved into calcalkaline and shoshonitic lavas after the collision of the Caribbean oceanic plateau -90 Ma. From -55 Ma Jamaica collided with the Yucatan peninsula and was subsequently tectonically transported to the east by transtensional opening of the Cayman Trough. This extension enabled decompression melting of the underlying asthenosphere to form the HNBs and adakites.

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Wigley, Rochelle Anne. "The geochemistry of the Karoo igneous volcanic and intrusive rocks of Botswana." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/21335.

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Bibliography: pages 183-191.
The Mesozoic basalts and dolerites of Botswana underlie an estimated area of 150 000km2 and form part of the Karoo Igneous Province of southern Africa. The distribution of Karoo basalts in Botswana is limited essentially to three main sub-basins, the Central Kalahari Subbasin, northern Botswana and the Tuli Syncline and a major dyke swarm, with a WNW strike, extends across Botswana from the Namibian to Zimbabwean borders. This dissertation is a reconnaissance study which concentrates on the recognition and definition of distinct geocheinical sub-groups within the Karoo volcanic and intrusive rocks of · Botswana. 128 new whole rock samples were analyzed for major and trace element concentrations, in addition to the 70 whole rock analyses from Botswana which were available in the UCT database.· Mineral analyses and rare earth element compositions for selected samples are also presented. The basalts and dolerites of Botswana are assigned to one of the three geochemical lineages, i.e. the low-K20, the high-K20 and the felsite lineages on the basis of Si02, MgO and K20 concentrations. A number of distinct geochemical sub-groups· are recognised within these lineages according to whole rock compositions, normative mineralogy, petrography and outcrop character. The low-K20 lineage is subdivided into two main sub-groups on the basis of the Ti02 and Zr concentrations, i.e. the LTZ- and HTZ-type basalt and dolerite sub-groups. The LTZtype basalt sub-group (with ~2% Ti02 and ~250ppm Zr) represents the bulk of the Botswana dataset where the LTZ basalts of Botswana are shown to be lateral equivalents to the Lesotho Formation basalts of the Central Karoo area, considerably expanding the known outcrop area of this basalt type. Two dolerites are the only samples of intrusive equivalents of this voluminous LTZ basalt type in Botswana.,

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32

Tam, Ka-wai. "Anisotropy in seismic wave velocity of jointed igneous rock in Hong Kong /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B24728846.

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Christodoulou, C. "Petrology of the plutonic rocks of the Macquarie Island Complex /." Title page, contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09PH/09phc556.pdf.

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Wong, Cheuk-ting, and 黃焯霆. "Geochemistry of igneous rocks in the Tai Mo Shan area: implication for tectonic setting." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46733425.

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Millett, John Michael. "Geochemical stratigraphy and correlation within the Faroe Islands Basalt Group with developments in the analysis of large igneous province deposits from well data." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=215221.

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Gibson, Lydia Catherine. "Antarctic lithosphere architecture and evolution : direct constraints from mantle xenoliths." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610665.

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Ryskamp, Elizabeth Balls. "Petrogenesis of Eocene-Oligocene magmatism of the Sulphur Springs Range, central Nevada: The role of magma mixing." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1607.pdf.

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Hanson, Emily Kate. "Estimating erosion of cretaceous-aged kimberlites in the Republic of South Africa through the examination of upper-crustal xenoliths." Thesis, Rhodes University, 2007. http://eprints.ru.ac.za/855/.

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Chen, Guohui. "Provenance-related studies of Triassic-Miocene Tethyan sedimentary and igneous rocks from Cyprus." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33185.

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Cyprus comprises three tectono-stratigraphic terranes: first, the Troodos Massif made up of Late Cretaceous oceanic lithosphere and its sedimentary cover in the centre of the island; secondly, the Mamonia Complex (and Moni Melange) a passive margin lithological assemblage in the west (and south) and thirdly, the Kyrenia Range, an active margin lithological assemblage in the north. This study focuses on the sedimentary cover of the Troodos Ophiolite in W Cyprus, the Triassic-Cretaceous sedimentary rocks of the Mamonia Complex and Late Cretaceous-Miocene igneous and sedimentary rocks in the Kyrenia Range, mainly based on combined sedimentology, geochemistry and geochronological dating. The Late Triassic-Early Cretaceous Mamonia Complex, SW Cyprus (and the Moni Melange, S Cyprus) represent parts of the emplaced passive continental margin of the S Neotethys. Late Triassic sandstones are characterised by a predominantly felsic source, with a subordinate mafic contribution. Jurassic-Early Cretaceous sandstones have a polycyclic felsic origin. Geochemical analyses are suggestive of progressive weathering and sediment recycling/sorting. The dominance of Ediacaran-Cryogenian and Tonian-Stenian-aged detrital zircon populations is suggestive of an ultimate north Gondwana source, probably recycled from Palaeozoic siliciclastic sedimentary rocks within Anatolia to the north. Similar detrital zircon populations characterise Early Cretaceous deltaic sandstone of the Moni Melange, S Cyprus. Sporadic Late Cretaceous subduction-related magmatism, represented by a Campanian volcaniclastic sequence (80.44±1.0 Ma) inWCyprus and a Late Campanian felsic volcanogenic sequence (72.9±1.0 Ma) in N Cyprus, represents early and more advanced stages of northward subduction during closure of the S Neotethys. Specifically, the Kannaviou Formation in W Cyprus (up to 750 m thick) is made up of deep-marine volcaniclastic sandstones that were mostly deposited by gravity flows and as air-fall tuff, interbedded with clay and radiolarian mudstones. Petrographic and geochemical analyses are indicative of a volcanic arc source, with deposition in a fore-arc basin. Petrographic evidence of terrigenous input (e.g. muscovite, muscovite schist, polycrystalline quartz) points to a subordinate continental source. Mineral chemistry is consistent with a volcanic arc origin. Elevated trace-element ratios in undevitrified volcanic glass (e.g. Th/Nb, Th/La) are indicative of involvement of continental crust or subducted terrigenous sediments in source-arc melting. Felsic volcanogenic rocks (Fourkovouno (Selvilitepe) Formation) in the Kyrenia Range, N Cyprus, occur as an up to 400 m-thick sequence of felsic tuffs, felsic debris-flowdeposits and rhyolitic lava flows. Geochemical analyses are indicative of evolved high-K and shoshonitic compositions, similar to those of the Andean active continental margin. Subduction continued to affect the northern continental margin of the S Neotethys in the Kyrenia Range during the Maastrichtian. This lead to the accumulation of Late Cretaceous sandstone turbidites and related basaltic volcanics, possibly in a back-arc setting. The volcanism took place in two phases (Late Cretaceous and Palaeogene-Early Eocene) during pelagic carbonate accumulation. These lavas have within-plate affinities, but with a variable subduction influence in some areas (e.g. western Kyrenia Range), which may be contemporaneous or inherited from previous subduction. The sedimentary sequences in the Kyrenia Range, N Cyprus, document diachronous closure of the S Neotethys. Late Cretaceous and Eocene sandstone turbidites, and the lower part of the overlying Oligocene-Miocene succession exhibit enrichment in ultramafic components that was probably sourced from ophiolite-related rocks in the Taurides to the north. In contrast, Miocene sandstone turbidites higher in the sequence show an increasing input of continent-derived siliciclastic material (and sorting effects). The terrigenous-influenced sediments are likely to represent erosion of thrust sheets that were emplaced from the S Neotethys onto the Arabian foreland in SE Turkey related to continental collision. Ediacaran-Cryogenian and Tonian-Stenian-aged zircons dominate the Late Cretaceous and Eocene sandstone turbidites, consistent with derivation from the Tauride micro-continent to the north and/or NE. Overlying Miocene sandstones include minor populations of Neoproterozoic-aged zircons, suggestive of reworking from source rocks of ultimately Gondwanan origin (e.g. NE Africa/Arabian-Nubian Shield). In summary, the thesis results exemplify the interaction of tectonic processes associated with the evolution of the S Neotethys Ocean. This began in the area studied with passive margin development (Triassic-Cretaceous), and was followed by multi-stage subduction-related volcanism and sedimentation (Late Cretaceous-Miocene). Final closure of the S Neotethys in this area took place during the Late Miocene-Recent.

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Huang, Kuan, and 黃寬. "Geological studies of igneous rocks and their relationships along the Kyrenia Range, Northern Cyprus." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40204030.

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譚家慧 and Ka-wai Tam. "Anisotropy in seismic wave velocity of jointed igneous rock in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31226747.

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Curl, Edward Alexander 1972. "Parental magmas of the Bushveld Complex, South Africa." Monash University, Dept. of Earth Sciences, 2001. http://arrow.monash.edu.au/hdl/1959.1/9080.

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Perry, Anna F. Parker Donnie Franklin. "Petrology of Cascade Head Basalt, Oregon Coast Range, USA." Waco, Tex. : Baylor University, 2007. http://hdl.handle.net/2104/5079.

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44

Buick, Ian S. "The petrology and geochemistry of granitic rocks from the Entia domal structure, Harts Range, eastern Arunta Block, Central Australia /." Title page, contents and abstract only, 1985. http://web4.library.adelaide.edu.au/theses/09SM/09smb932.pdf.

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45

Smithies, 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.

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The Kuboos-Bremen Igneous Province comprises a linear zone of alkaline complexes that intrude Proterozoic and Pan-African rocks and trends in a northeast direction from the northwest of the Cape Province in South Africa into southern Namibia. Of the three most southerly complexes in Namibia. two comprise silicate rocks ranging from nepheline syenite to alkali-granite and are called the Grootpenseiland and Marinkas Kwela Complexes (GPC and MKC). The Marinkas Kwela Carbonatite Complex is the third and most northerly of the complexes. Isotopic age determinations on a number of rock types from both the silicate complexes yield ages around 520Ma and are consistent with published Pan-African ages for the Province. Each silicate complex shows a migrating locus of intrusion from Siundersaturated rocks in the southwest to Si-oversaturated rocks in the northeast. The complexes overlap in outcrop. The rocks are moderately to highly felsiC and none reflects primary magma compositions. The Si-undersaturated rocks from both complexes include side-wall cumulates formed from magmas that fractionated alkali-feldspar, clinopyroxene and amphibole. Foyaites also occur in the MKC and have a compositional range reflecting alkali-feldspar fractionation and, probably, some interaction with dolomite country rocks. Major and trace element data suggest that critically saturated alkali syenites occurring in both complexes evolved via protracted feldspar fractionation, and that critically saturated alkali-feldspar syenite occurring only in the GPC is a cumulate. The two rock types cannot be related genetically. Of the SI-oversaturated rocks in both complexes, those in the compositional range monzonite to granite were intruded before alkali-granites. Compositional diversity amongst the former reflects fractionation of feldspar and of mafic phases, but that process cannot genetically link the rocks to the alkali-granites. Isotopic compositions of Sr and Nd indicate that the silicate magmas were derived from an upper mantle source region characterised by low time-integrated Rb/Sr ratios and high time-Integrated Sm/Nd ratios, However, the evidence of Sr and 0 isotopic data is that the Si-oversaturated melts possibly interacted with a crustal component. presumably the Proterowlc rocks of the Namaqua Metamorphic Province. This interaction may explain the occurrence of apparently co-genetic rock series that evolved on opposite sides of the feldspar join in Petrogeny's Residua System. The Marinkas Kwela Carbonatite Complex was emplaced before the final intrusive phases of the MKC and exhibits unusually pronounced late-stage enrichment in manganese. The earliest intrusive rocks in the complex were nepheline syenites which were fenitised by later intrusions of sôvites. Although the commonly occurring magmatic sequence of sôvite-beforsite-ferrocarbonatite is observed at Marinkas Kwela, sôvites do not appear to have been parental to beforsites. Removal of apatite and early crystallisation of magnetite distinguish magnetite-rich beforsite from co-genetic apatite-rich beforsite. Two further magmatic sequences. the first from apatite-rich beforsite through ferrocarbonatite to Mn-rich ferrocarbonatite (high Fe/Mn) and the second from magnetite-rich beforsite to Mn-rich ferrocarbonatite (low Fe/Mn). reflect fractionation of dolomite and of dolomite+magnetite respectively.

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He, Yanhong. "Ages and geochemistry of the Xiong'er volcanic rocks along the southern margin of the North China Craton implications for the outgrowths of the paleo-mesoproterozoic supercontinent Columbia (Nuna) /." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B4163424X.

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Heikoop, Cherylyn Elizabeth. "Pb isotope systematics in cenozoic igneous rocks from the Rio Grande Rift region, USA." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30145.pdf.

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Cox, Andrew Owen. "The igneous rocks of the western margin of Lake Rotoroa, Nelson Lakes National Park." Thesis, University of Canterbury. Geology, 1994. http://hdl.handle.net/10092/10100.

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The Rotoroa Complex located in NW Nelson, represents a remnant plutonic fragment of an extensive subduction system active between 140-130 Ma. The arc system has been subject to large scale transcurrent faulting during the Early Cretaceous. The result is a series of "dismembered Mesozoic volcanic and plutonic arc associations that are sandwiched between terranes of the Western and Eastern Provinces" (Kimbrough et al 1993). This association is collectively described as the Median Tectonic Zone (MTZ) by Bradshaw (1993), and Kimbrough et al (1993). The rocks encompassed by the term Rotoroa Complex range from rare hornblendite through gabbro to diorite and quartz diorite, all typically rich in hornblende. The complex has been metamorphosed in part by the Early Cretaceous emplacement of the Separation Point Batholith, resulting in widespread felsic sheets and dikes of Separation Point Suite affinity being present throughout the Rotoroa Complex. Lamprophyre camptonite dikes of unknown age are also intruded throughout the complex, which has been subjected to brittle deformation due to movements on the Alpine Fault since Late Oligocene - Early Miocene times. The Rotoroa Complex is broadly metaluminous, calc-alkaline, medium to high K in nature, and has island-arc subduction-related geochemical characteristics. The geochemical variation reflects primary igneous fractionation processes. The Rotoroa Complex probably correlates with the Darran Complex of Fiordland, based on similarities in rock type, geochemistry, structural position and magnetic anomalies. The geochemical trends obtained from analyses of the Rotoroa Complex are sufficiently similar to those described in the Darran Complex to support this notion.

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Côté, Denis. "Pétrographie, pétrologie et étude géochimique du dyke de diorite, de l'intrusion troctolitique et des deux petits massifs anorthositiques de Canton Taché /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1986. http://theses.uqac.ca.

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Mémoire (M.Sc.A.)--Université du Québec à Chicoutimi, 1986.
"Mémoire présenté à Chicoutimi en vue de l'obtention d'une maîtrise en science appliquée (géologie)" CaQCU Bibliogr.: p. 129-134. Document électronique également accessible en format PDF. CaQCU

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Péloquin, Alice Shirley. "The petrographic and geochemical variations in archean meta-basaltic pillows from the Kinojevis Group of the Abitibi Greenstone Belt, Rouyn-Noranda, Québec = Les variations pétrographiques en géochimiques des coussins basaltiques archéens du groupe de Kinojevis, sous-province de l'Abitibi, Rouyn-Noranda, Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1990. http://theses.uqac.ca.

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Dissertations / Theses on the topic 'Rocks, Igneous'

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