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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Strain analysis of lineated gneiss in the Hope Valley shear zone of southeast New England /

Jones, Emily S. January 2005 (has links) (PDF)
Undergraduate honors paper--Mount Holyoke College, 2005. Dept. of Earth and Environment. / Includes bibliographical references (leaves 26-28).
22

Geo-chemical studies in the Lewisian

Holland, James Grenville January 1965 (has links)
No description available.
23

Pressure Temperature Conditions of the Otrøy Opmhacite-Garnet Gneiss, Western Gneiss Region, Skandinavian Caledonides

Holmberg, Johanna January 2015 (has links)
Garnet-omphacite gneisses from the island of Otrøy situated in Western Gneiss Region (WGR), Norway, Scandinavian Caledonides, were examined within this study. The WGR is one of the planets most studied ultrahigh-pressure (UHP) terranes. The studied gneisses are hosts for UHP garnet peridotites and eclogites. The presence of the high pressure mineral assemblage including e.g. omphacite and phengite together with assumed remnants of pseudomorphic transition of formerly stable coesite present in omphacite and garnet, suggest formation of the Otrøy gneisses during ultrahigh pressure metamorphism (UHPM). However, geothermobarometry based on the mineral assemblage composed of garnet + clinopyroxene + phengite yielded pressure-temperature conditions of c. 880˚C and 2.2 GPa, characteristic for just high pressure metamorphism.  Nevertheless, it can be concluded that the Otrøy gneisses were formed due to the deep burial of continental crust during the continent-continent collision. This study provides insights into the understanding of the deep subduction of continental crust and expands our knowledge about the complex metamorphic and tectonic evolution of the WGR and the Scandinavian Caledonides. / Granat-omphacitförande gnejser från ön Otrøy i Western Gneiss Region (WGR), Norge, Skandinaviska Kaledoniderna, har undersöks i den här studien. WGR är ett av världens mest studerade område för ultrahögtryckmetamorfa bergarter. I den här typen av gnejser förekommer linser av ultrahögtrycksbergarter så som granat-peridotiter och eklogiter. I den studerade Otrøygnejsen förekommer bland annat phengit och omphacit med inneslutningar av sannolika pseudomorfer efter coesit. Detta visar på att Otrøygnejsen troligen har bildats under metamorfos vid ultrahöga tryck. Geotermobarometriundersökningen, baserat på granat + clinopyroxen + phengitsystemet, visar att tryck- och temperaturförhållandena var ca.880 ˚C och 2.2 GPa. Det innebär att gnejsen metamorfoserats inom intervallet karaktäristiskt för högtrycksmetamorfos. Likväl, kan det fastställas att Otrøygnejsen bildats till följd av en djup subduktion under kontinent-kontinentkollision. Den här studien bidrar till en ökad förståelse av processerna som påverkar den kontinentala skorpan vid djup subduktion och vidgar våra kunskaper om den komplexa metamorfa och tektoniska utvecklingen i WGR och de Skandinaviska Kaledoniderna.
24

Fuping complex and its significance in early precambrian crustal evolution of Sino-Korean craton

Guan, Hong, 關鴻 January 2000 (has links)
published_or_final_version / Earth Sciences / Doctoral / Doctor of Philosophy
25

A petrographic study of the Catalina gneiss in the forerange of the Santa Catalina Mountains, Arizona

Sherwonit, Bill, 1950- January 1974 (has links)
No description available.
26

Rb-Sr geochronological study of rocks of the Bear and Slave Provinces, Northwest Territories

Frith, Rosaline January 1974 (has links)
No description available.
27

Investigation of water-mineral interactions in gneissic terrain at Mt. Crawford, South Australia /

Biddle, Dean Leslie. January 1995 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Soil Science, 1996? / Diskette for IBM/PC in pocket on back end paper. Copies of author's previously published articles inserted. Includes bibliographical references (leaves 186-207).
28

Variations in nappe related fabric orientations during Paleopropterozoic ductile reworking of Archean basement, central Laramie Mountains, southeastern Wyoming /

Curtis, David, January 2004 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2004. / 1 folded map in pocket. Typescript. Includes bibliographical references (leaves 134-145). Also available on the Internet.
29

A field, petrographical and geochemical investigation of the Kennack Gneiss, Lizard Peninsula, southwest England /

Sandeman, Hamish A. I. January 1988 (has links)
Thesis (M.Sc.)--Memorial University of Newfoundland, 1989. / Typescript. Bibliography: leaves 281-291. Also available online.
30

Geochemical and isotopic evolution of the Maggo Gneiss component from the Hopedale Block, Labrador : evidence for Late-Middle Archaean crustal reworking /

Finn, Gregory Clement. January 1988 (has links)
Thesis (Ph.D.)--Memorial University of Newfoundland, 1989. / Typescript. Bibliography: leaves 381-401. Also available online.

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