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Origin of the Early Mesozoic Bogd Uul granite pluton, Ulaanbaatar area, MongoliaBaatar, Munkhbat, Dash, Bat-Ulzii, Danzan, Chuluun, Ochir, Gerel, Sodnom, Khishigsuren 25 December 2012 (has links)
No description available.
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The nature and origin of Western Australian tourmaline nodules ; a petrologic, geochemical and isotopic studyShewfelt, Debbie Amy 23 January 2006
The origin of tourmaline nodules, bizarre spherical to irregular textures documented worldwide, remains a geologic mystery. Although previously described by numerous researchers, the physical and chemical parameters that govern their formation have yet to be resolved. Commonly containing tourmaline, quartz, and occasionally feldspar, nodules are surrounded by a halo of leucocratic host rock, and are typically eight to ten centimeters in diameter. Tourmaline nodules of the present study are contained within the Paleoproterozoic Scrubber Granite of the southern Gascoyne Complex in Western Australia. </p> <p>This study integrated field observations, nodule petrography, tourmaline crystal chemistry, tourmaline fluid inclusion analyses, whole rock chemistry of nodule cores, leucocratic halo zones and host granite zones, stable and radiogenic isotope signatures of tourmaline separates as well as comparisons with other tourmaline nodule studies to propose the most scientifically sound theory for the formation of tourmaline nodules in the Scrubber Granite. </p> Numerous nodule morphologies, including spherical and C-shaped nodules, along with other features such as tube-like nodules and tourmaline veins occur in massive, porphyritic, foliated and sheared phases of the Scrubber Granite. Microscopically, tourmaline displays prismatic, sub-rounded and massive textures. Microthermometric studies completed on tourmaline fluid inclusions revealed that the nodule-forming fluid contained 14 to 15 weight percent NaCl + CaCl2. Based on stable isotope studies and homogenization temperatures, fluid temperatures were constrained between 450 and 700¢ªC. The ¥ä18O and ¥äD concentrations of the nodule-forming fluid at this temperature range plot above the typical magmatic water field. Epsilon Nd values indicate that the tourmaline nodules of the Scrubber Granite may have been disturbed by a later metamorphic event.</p>Tourmaline nodules of the Scrubber Granite are herein proposed to have formed from the exsolution and rise of buoyant pockets or bubbles of volatile fluid derived from the crystallizing Scrubber Granite magma.
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The nature and origin of Western Australian tourmaline nodules ; a petrologic, geochemical and isotopic studyShewfelt, Debbie Amy 23 January 2006 (has links)
The origin of tourmaline nodules, bizarre spherical to irregular textures documented worldwide, remains a geologic mystery. Although previously described by numerous researchers, the physical and chemical parameters that govern their formation have yet to be resolved. Commonly containing tourmaline, quartz, and occasionally feldspar, nodules are surrounded by a halo of leucocratic host rock, and are typically eight to ten centimeters in diameter. Tourmaline nodules of the present study are contained within the Paleoproterozoic Scrubber Granite of the southern Gascoyne Complex in Western Australia. </p> <p>This study integrated field observations, nodule petrography, tourmaline crystal chemistry, tourmaline fluid inclusion analyses, whole rock chemistry of nodule cores, leucocratic halo zones and host granite zones, stable and radiogenic isotope signatures of tourmaline separates as well as comparisons with other tourmaline nodule studies to propose the most scientifically sound theory for the formation of tourmaline nodules in the Scrubber Granite. </p> Numerous nodule morphologies, including spherical and C-shaped nodules, along with other features such as tube-like nodules and tourmaline veins occur in massive, porphyritic, foliated and sheared phases of the Scrubber Granite. Microscopically, tourmaline displays prismatic, sub-rounded and massive textures. Microthermometric studies completed on tourmaline fluid inclusions revealed that the nodule-forming fluid contained 14 to 15 weight percent NaCl + CaCl2. Based on stable isotope studies and homogenization temperatures, fluid temperatures were constrained between 450 and 700¢ªC. The ¥ä18O and ¥äD concentrations of the nodule-forming fluid at this temperature range plot above the typical magmatic water field. Epsilon Nd values indicate that the tourmaline nodules of the Scrubber Granite may have been disturbed by a later metamorphic event.</p>Tourmaline nodules of the Scrubber Granite are herein proposed to have formed from the exsolution and rise of buoyant pockets or bubbles of volatile fluid derived from the crystallizing Scrubber Granite magma.
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Contribution à l'étude du comportement mécanique et thermo-hydro-mécanique des argilites du Callovo-Oxfordien application au stockage des déchets radioactifs /Su, Kun Shao, Jian Fu January 2007 (has links)
Reproduction de : Habilitation à diriger des recherches : Sciences physiques. Géomécanique : Lille 1 : 2005. / N° d'ordre (Lille 1) : 500. Titre provenant de la page de titre du document numérisé. Bibliogr. p. 83-86. Liste des publications.
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Birrimian metamorphic and associated granitic rocks (Precambrian), south-central Ghana, West AfricaFakundiny, Robert H. 27 June 2011 (has links)
The Birrimian System forms most of the exposed Precambrian shield of West Africa. About half of Ghana is underlain by Birrimian metamorphic and granitic rocks. In the Dunkwa S. E. area (Field Sheet 48) of south-central Ghana, interlayered sedimentary and volcanic rocks were metamorphosed to greenschist and amphibolite facies. These sheared and tightly folded metamorphic rocks have incipient retrograde metamorphism of biotite and garnet to chlorite or hornblende to biotite. Two large intrusive bodies in the metamorphic terrain may be partly the result of granitization: (1) the Pra River complex, an albitized laccolith or sill, consisting of quartz monzonite, quartz diorite, and granodiorite; (2) the Twifu Praso complex of albite granite and granodiorite gneiss. All of the above rocks were folded along northeast-trending fold axes. Then a third granitic body, the Wuwu River albitized quartz monzonite, intruded and locally re-folded the older rocks. / text
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Rapakivi formation of O'Leary Peak porphyryBladh, Katherine Laing, 1947- January 1976 (has links)
No description available.
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Petrology and mineralogy of radioactive granitic rocks near Baie Johan Beetz, QuebecHauseux, Marcelle Aline January 1976 (has links)
No description available.
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Sedimentology and stratigraphy of the Granite Wash: Contact Rapids and Keg River Sandstone (Red Earth area)Balshaw, Kevin Ewart Unknown Date
No description available.
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Optimisation of the quarrying, processing and utilisation of South Australian granite resources /Chesini, Giambattista. Unknown Date (has links)
Thesis (MEng(MiningEngineering))--University of South Australia, 2001.
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Étude des complexes granito-gneissiques de Cyimbili, Mara et Mutara République Rwandaise (Afrique centrale) /Hildebrand, Kanzira. January 1984 (has links)
Mémoire (M.Sc.A.)---Université du Québec à Chicoutimi, 1984. / 3 cartes pliees dans une pochette. "Mémoire présenté en vue de l'obtention du diplôme de maîtrise en sciences appliquées (géologie)" CaQCU CaQCU Document électronique également accessible en format PDF. CaQCU
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