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Dissertations / Theses on the topic 'Metasedimentary rocks'

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Published: 4 June 2021
Last updated: 20 June 2025

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1

Lewerentz, Alexander. "Fluid-induced alteration of metasedimentary rocks in the Scottish Highlands." Doctoral thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-146121.

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Fluids, mainly H2O and CO2, are released from H- and C-bearing phases during prograde metamorphism. Because of the buoyancy of these fluids, they rise within the crust towards the surface of the Earth. Metamorphic fluids take advantage of permeable horizons, shear zones, fold hinges, fractures, and are channelled into high-flux zones. Fluid fluxes for channelized fluid flow may exceed background pervasive fluxes by several orders of magnitude. Metamorphic fluids react with the surrounding rock during fluid flow, and altered zones are commonly observed adjacent to high-flux conduits. Fluid-altered rock is texturally, mineralogically, chemically, and isotopically different from rock unaffected by fluid flow. In this thesis, fluid-rock interaction is studied at two localities in the Scottish Highlands: Glen Esk and the Isle of Islay. Glen Esk is one of the type localities used by George Barrow (1853-1932) to propose the concept of metamorphic zones and metamorphic index minerals as an approximate determination of metamorphic grade. In several of the metamorphic zones in Glen Esk, index mineral distribution is highly dependent on proximity to veins. The occurrence of index minerals is therefore not only controlled by pressure and temperature, but also by the availability of metamorphic fluids. Evidence of a retrograde fluid flow event from the North Esk Fault is observed in Glen Esk, for which a time-averaged fluid flux of 0.0003 – 0.0126 m3∙m-2∙yr-1 is calculated. The duration of the fluid event is estimated to between 16 and 334 kyr. On the Isle of Islay, kyanite is observed in rocks of chlorite or lower-biotite metamorphic grade, i.e. much lower temperatures than usually associated with kyanite formation. The favoured explanation for this is retrograde infiltration of extremely high-CO2 fluids, at least locally XCO2 &gt; 0.7, at ~340°C, which altered these rocks and stabilised kyanite in a carbonate-bearing assemblage. Oxygen and carbon stable isotope profiles across the Islay Anticline reveals highly channelized fluid flow along the axial region of this fold, with fluid:rock ratios at least four times higher than in rock farther away from the fold. Although carbon and oxygen isotope ratios of metacarbonate rocks were altered along the Islay Anticline, negative anomalies observed below and above the Port Askaig Tillite Formation cannot solely be attributed to metamorphic fluid flow, which implies that these rocks to varying degree retain their primary paleoclimatological isotopic signatures.<br>Stora volymer H2O och CO2 frigörs som fluider under prograd metamorfos. Metamorfa fluider har lägre densitet än det omgivande berget, varför de stiger genom jordskorpan mot jordytan. Metamorfa fluider kanaliseras i permabla lager, skjuvzoner, veckaxlar, sprickor och andra högflödeszoner. Kanaliserade fluidflöden kan vara flera storleksordningar högre än bakgrundsvärdet för fluidflöde inom en bergart. Metamorfa fluider reagerar under transport med det omgivande berget och bildar fluidomvandlade zoner i anslutning till högflödeskanaler. Fluidomvandlat berg uppvisar texturella, mineralogiska, kemiska och isotopsammansättningsmässiga skillnader i jämförelse med berg som inte utsatts för fluidomvandling. I denna avhandling behandlas reaktioner mellan fluid och berg som studerats i två lokaler i de skotska högländerna: Glen Esk och Islay. Glen Esk är en av de typlokaler som George Barrow (1853-1932) använde för att lägga fram konceptet om metamorfa zoner och metamorfa indexmineral som används för att ungefärligt uppskatta metamorf grad. I flera av de metamorfa zonerna är förekomsten av indexmineral i hög grad beroende av närhet till kvartsådror, vilket visar att bildandet av indexmineral inte bara styrs av tryck och temperatur, utan också av åtkomst till metamorfa fluider. I Glen Esk finns också spår av ett fluidflöde från North Esk-förkastningen, under retrograda metamorfa förhållanden, för vilket mededfluidflödet över tid uppgår till 0.0003 – 0.0126 m3∙m-2∙år-1. Denna fluidflödeshändelse beräknas ha pågått mellan 16 000 och 334 000 år. På ön Islay i de sydvästra högländerna återfinns bergarter, som trots sin låga metamorfa grad i klorit- eller biotitzonen innehåller mineralet kyanit, dvs. temperaturer långt under vad som vanligen associeras med kyanitbildning. Detta förklaras med infiltration av fluider med extremt hög CO2-halt, åtminstone lokalt så högt som XCO2 &gt; 0.7, vid ca. 340°C. Fluidomvandling av dessa bergarter stabiliserade kyanit tillsammans med karbonatmineral. Syre- och kolisotopprofiler över Islayantiklinen påvisar hög kanalisering av fluider längs dess veckaxeln. Förhållandet mellan fluid och berg var mer än fyra gånger så högt i närheten av veckaxeln jämfört lokaler längre ifrån densamma. Påverkan av metakarbonatbergarters isotopförhållanden har skett längs Islayantiklinen, men fluidpåverkan kan inte ensamt förklara de isotopanomalier som observerats under och ovan Port Askaig-tilliten, varför dessa bergarter kan ha bibehållit sin primära paleoklimatologiska isotopsignatur.<br><p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Submitted. Paper 3: Manuscript.</p>
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2

Hyslop, Ewan Kennedy. "Strain-induced metamorphism and pegmatite development in the Moine rocks of Scotland." Thesis, University of Hull, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341013.

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3

Eriksson, Sarah. "Tracing the Origin of Metasedimentary Rocks in the Faroe-Shetland Basin." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-297082.

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The Faroe-Shetland region has been exposed to a long history of tectonic events and the geology in the area is rather complex. This history has led to the formation large metasedimentary deposits, though the origin of these deposits is not yet fully understood. Possible source areas are Greenland, Norway and Scotland. To give a further understanding of the geology in the Faroe-Shetland basin and its regional relationship this study will analyze metasediments to classify them and compare them with other related sediments. Geochemical, petrographical and isotopic data will be for classification. Through this comparison it is evident that the metasediments from the Faroe-Shetland basin contain remnants from several different deposits and cannot be rated to one specific origin. This is shown by the 143Nd/ 144Nd , 87Sr/ 86Sr and 206Pb/204Pb , 207Pb/204Pb, 208Pb/204Pb isotope ratios found in the Faroe-Shetland basin compared with other possible source areas from Greenland, Norway and Scotland. This has shown that the isotope from the Faroe region correlate well with Caledonian traces from both Greenland and Scotland. Though the Torridonian sandstone from Scotland can also be correlated with the metasediments in the Faroe-Shetland basin.<br>Regionen kring Färö-Shetland bassängen har blivit utsatt för en lång historia av tektoniska orogeneser och extensioner vilket har lett till geologisk komplexitet i området. Metasediment täcker stora delar av bassängen, men ursprunget av dessa avsättningar är ännu inte helt fastställt. Grönland, Skottland och Norge är några av de föreslagna ursprungsområdena till de sedimentära avsättningarna. För att fördjupa förståelsen kring dessa metasediment och deras regionala relationer till andra platser, så fokuserar denna studie på att jämföra och klassificera metasediment från Färö-Shetland bassängen. Geokemisk, petrologisk och isotopdata kommer användas för klassifikation, medan isotopdata huvudsakligen kommer att ligga till grund för jämförelsen av troliga sedimentära källor. Genom denna jämförelse så har det blivit tydligt att metasedimenten från Färö-Shetland bassängen innehåller spår från flertalet olika områden och avsättningarna kan inte enbart förklaras utifrån ett ursprungsområde. Detta framgår genom isotopförhållandena 143Nd/144Nd , 87Sr/86 Sr and 206Pb/204Pb , 207Pb/204Pb, 208Pb/204Pb, vilka hittats i Färö-Shetland bassängen i jämförelse med andra möjliga källor från Grönland, Skottland och Norge. Detta påvisar en komplex metasedimentär sekvens, en sekvens efter den komplexa tektoniska historian.
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4

Ford, Frederick Dean Carleton University Dissertation Geology. "Petrology of the Flinton Creek ultramafic rocks, central metasedimentary belt, Grenville province." Ottawa, 1989.

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5

Grammatikopoulos, Tassos A. L. "Wollastonite skarn mineralization and associated plutonic rocks in the Grenvillian Central Metasedimentary Belt, SE Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/NQ42944.pdf.

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6

Woodhouse, Ailsa Jane. "Provenance of late archaean metasedimentary rocks on the southern Gawler craton : implications for its early crustal development /." Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09SB/09sbw889.pdf.

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7

Okonkwo, C. T. "The geology and geochemistry of the metasedimentary rocks of the Loch Laggan - Upper Strathspey area, Inverness-shire." Thesis, Keele University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355609.

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8

Duff, Jason. "A Geochemical and Isotopic Investigation of Metasedimentary Rocks from the North Caribou Greenstone Belt, Western Superior Province, Canada." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30972.

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The North Caribou Greenstone Belt (NCGB) lies at the core the granitoid-dominant North Caribou Terrane (NCT). Two sedimentary assemblages; the Eyapamikama (ELS) and Zeemal-Heaton Lake (ZHA) form the core of the NCGB. Geochemistry of garnets from the orogenic Au deposit at Musselwhite suggest that the auriferous fluids have a contribution of metamorphic fluids and mineralization consisted of prolonged, multi-stage periods. Chemical zoning suggests changes in the influx of chalcophile and lithophile elements and that Au/sulphide ratios during nucleation were lower relative to later growth events. Zircons from the ELS and ZHA suggest a c. 100 My hiatus in the onset of sedimentation, with the ZHA showing younger, “Timiskaming-type” ages. Age distributions from each assemblage reflect proximal, igneous sources. Nd isotopic compositions of the ZHA suggest a mixture of ancient and contemporaneous sources which are similar to external TTG rocks. Deplete mantle model ages of the ZHA rocks indicate a Mesoarchean inheritance.
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9

Thern, Eric Royal. "Geological Histories from 4372 Ma to 26 Ma Recorded in Siliciclastic Metasedimentary Rocks from the Central Yilgarn Craton." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/69345.

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This study presents an investigation of detrital, metamorphic, and hydrothermal minerals from siliciclastic metasedimentary rocks of the Illaara and Maynard Hills greenstone belts, central Yilgarn Craton. This research assesses how 4.3 to 3.0 Ga detrital zircon populations came to be found in dispersed metasedimentary rocks, how these rock occurrences relate to each other and what this may reveal about the early Earth and the formation of the Yilgarn Craton.
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10

Loan, MaryEllen Louise. "New Constraints on the Age of Deposition and Provenance of the Metasedimentary Rocks in the Nashoba Terrane, SE New England." Thesis, Boston College, 2011. http://hdl.handle.net/2345/2422.

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Thesis advisor: J. Christopher Hepburn<br>The Nashoba terrane of SE New England is one of three peri-Gondwanan tectonic blocks caught between Laurentia and Gondwana during the closure of the Iapetus Ocean in the early to mid- Paleozoic. U-Pb analyses (LA-ICP-MS) were carried out on zircon suites from the meta-sedimentary rocks of the Nashoba terrane. The youngest detrital zircons in the meta-sedimentary rocks of the Nashoba terrane are Ordovician in age. There is no significant difference in age between meta-sedimentary units of the Nashoba terrane across the Assabet River Fault Zone, a major fault zone that bisects the NT in a SE and a NW par. Zircon in meta-sedimentary rocks in the Marlboro Fm., the oldest unit of the Nashoba terrane, is rare, which may reflect the basaltic nature of the source material, and is commonly metamict. The Marlboro Fm. contained the oldest detrital grain of all the analyzed samples, with a core of ~3.3 Ga and rim of ~2.6 Ga indicating that it was sourced from Archaen crustal material. Detrital zircons from the Nashoba terrane show a complete age record between the Paleoproterozoic and Paleozoic that strongly supports a provenance from the Oaxiqua margin of Amazonia. The detrital zircon suite of the Nashoba terrane is distinct from both Avalonia and the Merrimack belt; however, they resemble zircon suites from Ganderia. This study proposes that the Nashoba terrane of Massachusetts correlates with the passive trailing edge of Ganderia. Finally, metamorphic zircon analyses of the terrane show that the Nashoba terrane experienced a peak in hydrothermal fluid infiltration during the Neoacadian orogeny<br>Thesis (MS) — Boston College, 2011<br>Submitted to: Boston College. Graduate School of Arts and Sciences<br>Discipline: Earth and Environmental Sciences
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11

Wang, Qian. "A geological traverse across the Jack Hills Metasedimentary Belt, Western Australia: Isotopic constraints on the distribution of proterozoic rocks and the evolution of Hadean Crust." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/2275.

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Samples of every rock type present along a traverse through the Jack Hills belt were examined and processed for zircon, monazite and xenotime isotopic study. Zircon U-Pb ages range from 1618±22 Ma to 4381±5 Ma, confirming the presence of both Archean and Proterozoic successions. Lutetium-Hf data for Hadean zircons imply a primitive source that was reworked with little juvenile input from the mantle. Monazite data confirm that the Archean rocks were metamorphosed at 2.65 Ga.
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12

BODIN, EUGENE JOELLE. "Le devonien inferieur et moyen des pyrenees ariegeoises et centrales : biostratigraphie, series heteropiques et mise en evidence de nappes hercyniennes precoces." Toulouse 3, 1987. http://www.theses.fr/1987TOU30211.

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L'etude biostratigraphique, a l'aide des conodontes, du devonien inferieur et moyen des pyrenees ariegeoises et centrales a permis de distinguer 3 domaines paleogeographiques allonges selon l'axe de la chaine pyreneenne. Ils se dfferencient egalement par leur lithologie. On met en evidence une tectonique tangentielle varisque qui amene les series du nord a chevaucher les series sud et ces dernieres a chevaucher le substratum. Ces nappes precoces a vergence du nord vers le sud, d'ampleur plurikilometrique, constituent un trait essentiel de l'orogenese varisque pyreneenne
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13

Toteu, Sadrack-Félix. "Chronologie des grands ensembles structuraux de la région de Poli : Accretion crustale dans la chaîne panafricaine du Nord Cameroun." Nancy 1, 1987. http://www.theses.fr/1987NAN10057.

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Les nouvelles données structurales, géochimiques et géochronologiques indiquent un important volume de matériel d'âge protérozoïque supérieur dans le "complexe de base" et dans la "série de Poli". L'évolution tectonique et métamorphique est comparable pour les deux ensembles. Les caractéristiques géochimiques et isotopiques de l'essentiel des formations plutoniques et volcaniques de l'essentiel des formations plutoniques et volcaniques montrent qu'il s'agit de matériel juvénile nouvellement mis en place en bordure d'une croûte plus ancienne. Une chronologie des évènements panafricains est établie. Les nouveaux résultats permettent d'interprêter l'orogénèse panafricaine du Nord Cameroun en terme de tectonique des plaques
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14

Gebremariam, Solomon Gebresilassie. "Nature and characteristics of metasedimentary rock hosted gold and base metal mineralization in the Workamba area, central Tigray, northern Ethiopia." kostenfrei, 2009. http://edoc.ub.uni-muenchen.de/10882/.

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Gebremariam, Solomon. "Nature and characteristics of metasedimentary rock hosted gold and base metal mineralization in the Workamba area, central Tigray, northern Ethiopia." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-108823.

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16

Rector, Sharon. "Fabric analysis of deformed Proterozoic metasedimentary rocks, western Wedel Jarlsberg Land, Spitsbergen." 1987. http://catalog.hathitrust.org/api/volumes/oclc/17483160.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1987.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 91-95).
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17

Gardner, David A. "Foliations in upper Proterozoic metasedimentary rocks of the Chamberlindalen area, Wedel Jarlsberg land, Spitsbergen." 1988. http://catalog.hathitrust.org/api/volumes/oclc/17574463.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1988.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 114-118).
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18

Woodhouse, A. J. "Provenance of Late Archaean metasedimentary rocks on the southern Gawler Craton: Implications for its early crustal development." Thesis, 2002. http://hdl.handle.net/2440/123522.

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This item is only available electronically.<br>Geochemical, whole rock Sm-Nd and detrital zircon U-Pb isotopic data from Archaean metasedimentary successions in the southern Gawler Craton indicate derivation from Late Archaean sources. Detrital zircons from the upper amphibolite-grade Wangary Gneiss have dominant U-Pb age groupings at 2500-2580 Ma and 2600-2720 Ma, with a few analyses ranging up to 2950-3150 Ma. Steep LREE enrichment REE with (La/Yb)N = 46 – 58 and low abundances of compatible trace elements point to a major felsic source component, with REE patterns typical of Na-rich granites. Detrital zircons from the metasedimentary dominated Hall Bay Volcanics (2500-2560 and 2660-2710 Ma) show a similar range of detrital zircon ages to the Wangary Gneiss, suggesting both sequences were derived from a temporally similar Late Archaean source terrain. The Carnot paragneisses and the Hall Bay Volcanics metasedimentary rocks show comparative HREE enrichment ((La/Yb)N = 7.4-12.5 and (La/Yb)N = 10.2-15.7 respectively), suggesting a greater input of mafic or intermediate material relative to the Wangary Gneiss. The correspondence in detrital zircon ages between the Wangary Gneiss and Hall Bay Volcanic metasedimentary rocks suggests both units form part of the same succession. Existing zircon U-Pb data provides no evidence for input of Early Archaean crust into the Wangary Gneiss, Hall Bay Volcanics or Carnot paragneisses, which is further substantiated by Sm-Nd depleted mantle model ages that range from 2900 to 3200 Ma in all metasedimentary rocks. The overlap of detrital zircon and depleted mantle model ages suggests that all three successions in the southern Gawler Craton comprise a single basinal succession. The geochemical compositions of the late Archaean sequences in the southern Gawler Craton are consistent with derivation from a bimodal terrain with variable mixing of three distinct sources: (1) intermediate-felsic volcanics; (2) mafic rocks and (3) highly fractionated Na-rich felsic rocks (tonalites-trondhjemites). These source regions are currently unidentified in the Gawler Craton, however, source terrains for the late Archaean sequences may be preserved in association with the 2500-3000 Ma age crust in rifted off components of the Gawler Craton in Antarctica. Although speculative at this stage, deposition of the Late Archaean sequences in the southern Gawler Craton is likely to have occurred on a rifting margin to a Late Archaean terrain. Sedimentation was terminated during collisional closure of the basin system leading to the 2500-2400 Ma Sleafordian Orogeny.<br>Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2002
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Yeh, Chih-Ying, and 葉芝穎. "New constraints and interpretations on peak pressure-temperature conditions of metasedimentary rocks in the Yuli belt, eastern Taiwan." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6n5846.

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碩士<br>國立東華大學<br>自然資源與環境學系<br>107<br>P-T conditions of the in-situ metasedimentary rocks in the Yuli belt are mostly unclear owing to lack of HP minerals or assemblages. To solve this problem, this study applied Raman Spectroscopy of Carbonaceous Material (RSCM) geothermometer to estimate peak metamorphic temperatures of metasedimentary rocks in the Juisui and Chinshuichi areas. In the Juisui area, from east (structurally lower) to west (higher), average temperature data of the four units are in the range of 385-414 °C, 478-532 °C, 380-421 °C, and 408-472 °C, respectively. In the Chinshuichi area, average temperature data of the two units are in the range of 497-505 °C (structurally lower) and 356-420 °C (higher), respectively. Average temperature data of the low-grade slate unit on the east side of the Yuli belt are in the range of 333-334 °C. The temperature results from the highest grade unit (Juisui unit) show a wide variation. This study also applied Raman spectroscopy to constrain residual (entrapment) pressures of quartz inclusions in garnet from the highest grade units. Combining the RSCM thermometric results, the pressure-temperature condition of garnet-bearing pelitic schist samples are 16.8-17.8 kbar / ~590 °C and 13.9-14.7 kbar / ~550 °C, respectively. These results are consistent with those of high-pressure metamorphic rocks in the Yuli belt in previous studies.
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20

Howard, K. E. "Provenance of Palaeoproterozoic metasedimentary rocks in the eastern Gawler Craton, Southern Australia: Implications for reconstruction models of Proterozoic Australia." Thesis, 2006. http://hdl.handle.net/2440/123593.

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This item is only available electronically.<br>Detrital zircon ages obtained from the Corny Point Paragneiss and the Massena Bay Gneiss in the southeastern Gawler Craton, Australia, constrain their deposition to the interval ca. <1880 Ma. The presence of 2020 Ma, 2450 Ma and 2520 Ma detrital zircons within the Corny Point Paragneiss constrains the source region for the sedimentary protoliths to three possible domains within Australia; the Gawler Craton, the Glenburgh Orogen in the Western Australian Proterozoic, and the North Australian Craton, all of which contain rock systems with similar ages. Whole rock εNd (1850Ma) values from the Corny Point Paragneiss range from -1 to -5. These values potentially preclude the Late Archaean to mid Proterozoic crust of the Gawler Craton as a sole or major source region due to its highly evolved average εNd (1850Ma) of around -10. Preclusion of the Gawler Craton as a source is apparently confirmed by Hf isotopic compositions of 2020 Ma detrital zircons from the Corny Point Paragneiss, which have εHf (2020Ma) ranging between +3 to +7. This compares with εHf (2020Ma) of -1 to -4 for zircons from the 2020 Ma Miltalie Gneiss in the Gawler Craton. Available Nd isotopic data suggests that the Glenburgh Orogen is too crustally evolved to have provided the majority of sediment into the Corny Point Paragneiss protolith. The 2020 Ma detrital Hf isotopic compositions of the Corny Point Paragneiss are similar to the 2020 Ma Wildman Siltstone (εHf (2020Ma) +2 to +7) in the Pine Creek Orogen in the North Australian Craton. Two possible scenarios can be extrapolated from the detrital zircon and Nd isotopic data; (1) the Corny Point Paragneiss sediment was derived from a source region within the North Australian Craton and could share source regions with the Wildman Siltstone, or (2) the sediments were derived from a Gawler Craton source region that included a dominant juvenile component of the 2020 Ma Miltalie Gneiss in the adjacent Gawler Craton which has since been eroded. In the first scenario, the absence of connection to the Gawler Craton allows for the Betts and Giles (2006) plate reconstruction model, which proposes that the Corny Point Paragneiss formed part of the North Australia Craton, and was sutured to the Proto Gawler Craton at 1730-1700 Ma. The second scenario highlights a significant limitation in evaluating the significance of provenance data, particularly when considering old potential source terrains that have undergone significant levels of denudation. The proximity of the Corny Point Paragneiss to the rifted southern and eastern margins of the Australian Proterozoic means a thorough evaluation of the palaeogeographic significance of the Corny Point Paragneiss detrital signature requires corresponding datasets from regions such as Antarctica which were formerly contiguous with the Gawler Craton.<br>Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2006
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21

Fox, Don. "Structure, metamorphism and tectonic setting of metasedimentary rocks and mafic-ultramafic inclusions in the Dashwoods subzone of the Dunnage zone, southwestern Newfoundland /." 1992. http://collections.mun.ca/u?/theses,75451.

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22

Alexander, Sharyn Anne. "Geological significance of deformed metavolcanic, metasedimentary, and plutonic rocks in the Composite Arc Belt, southwest Grenville Province, near Actinolite, Ontario." 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=81093&T=F.

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23

Palya, Annie P. "Storage and mobility of organic nitrogen and carbon in the continental crust: Evidence from partially melted metasedimentary rocks, Mt. Stafford, Australia." 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1463953.

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24

Barrett, L. "The structural geology of the Rapid Bay­Second Valley area, Fleurieu Peninsula, South Australia." Thesis, 1995. http://hdl.handle.net/2440/128629.

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This item is only available electronically.<br>Whilst the geology of the Rapid Bay-Second Valley area is known to be both structurally and stratigraphically complex, previous workers (Daily, 1963; Evans 1987; Drayton, 1963; Campana and Wilson, 1955) have been unable to agree on many aspects of the area. Neoproterozoic and Cambrian aged sediments were first deposited in an extensional basin, which was formed due to lithospheric thinning, and associated subsidence (Jenkins, 1986, 1990). These rocks have then been subjected to at least one phase of deformation, the Cambro-Ordovician Delamerian Orogeny (Offler & Fleming, 1968; Thompson, 1970). Listric extensional faults were formed both before and during sedimentation of the rocks, which has created narrow zones of weakness that the subsequent compressional event has exploited, creating thrust faults (Flottman et al., 1994). Structural mapping of the area has revealed that it is transected by two thrust faults and is intensely folded in places. Structural data has been collected during eight weeks of field work and has been compiled into a 1:10 000-scale geological map which accurately represents the area. A computer-generated three-dimensional model has been created for the area, based on this map, and cross and profile sections constructed from the data collected. The model was constructed using Vulcan™ software. Strain analysis has also been conducted on many of the folds in the area.<br>Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1995
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Cao, Zheng Hong, and 曹恕中. "The geological significances of illite crystallinity, zircon fission-track ages, and K-Ar ages of metasedimentary rocks of the central range of Taiwan." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/61589133333717691389.

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Burt, Emelia Anna. "Oxygen isotope studies of some sedimentary and metasedimentary rocks of the central and northern Appalachian Mountains, the Colorado Plateau, and the Ouachita Mountains." Thesis, 1993. https://thesis.library.caltech.edu/7295/1/Burt_ea_1993.pdf.

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<p>Terrigenous sedimentary rocks from the Colorado Plateau show a relatively uniform bulk silicate δ^(18)O of +14.8 with an SEM of 0.32. Shales and calcilutites in this region have a mean bulk silicate δ^(18)O of +17.7 which is significantly heavier than the mean for interbedded sandstones and siltstones. Bulk silicate δ^(18)O is decoupled from carbonate δ^(18)O due to differences in mode of deposition and diagenetic behavior.</p> <p>Central Appalachian terrigenous sedimentary rocks show a surprisingly uniform bulk silicate δ^(18)O of +14.8 with an SEM of 0.1. The mean bulk silicate δ^(18)O for all shales (+15.2) is only 0.3 per mil heavier than the mean for all sandstones and siltstones (+14.9). The oxygen isotope uniformity of Central Appalachian sedimentary rocks is mainly a primary depositional feature that is the result of thorough, grand-scale mixing of terrigenous sediment in the Appalachian geosyncline, probably involving several cycles of sedimentation, uplift, erosion, and reworking extending over hundreds of millions of years during the Paleozoic era. The bulk silicate δ^(18)O of siltstones and shales shows a significant (P ˂ 0.05) correlation with conodont color alteration index, which is a measure of diagenetic temperature. As a result of isotopic exchange with porewater during diagenesis, the bulk silicate δ^(18)O of shales and siltstones can apparently be lowered by as much as 2.5 to 4.0 per mil. These diagenetic effects contributed to the overall homogeneity of these sedimentary rocks because the shales started out at higher δ^(18)O.</p> <p>A reconnaissance ^(18)O/^(16)O study of 14 samples of terrigenous sedimentary rocks from the Ouachita Mountains suggests more inherent isotopic variation in these samples, perhaps in part as a result of greater heterogeneity of source regions. Some of the isotopic variation also seems clearly attributable to diagenetic effects. A significant (P ˂ 0.05) correlation was found between mean vitrinite reflectance, also a measure of diagenetic temperature, and the bulk silicate δ^(18)O difference between shale-sandstone pairs in three different sedimentary formations.</p> <p>Northern Appalachian metasedimentary rocks show a decrease in bulk silicate δ^(18)O at garnet grade and higher. The terrigenous facies metamorphic rocks have been depleted in ^(18)O by about two per mil relative to their unmetamorphosed counterparts in the Central Appalachians, except where they are adjacent to carbonate-rich sections. Carbonate facies metasedimentary rocks are 5 to 6 per mil higher than interbedded terrrigenous facies rocks, but at the margins of that formation there is a distinct lowering of bulk silicate δ^(18)O and carbonate δ^(18)O due to influx of metamorphic hydrothermal fluids from the adjacent terrrigenous rocks. This is attributed to the involvement of isotopically light fluids during metamorphism. Further work is need to elucidate the differences between metamorphic processes in pelitic and calcareous sediments.</p>
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葉晃伸. "Petrological and geochemical studies of the back arc basinal volcanic and metasedimentary rocks from Laohushan area, east section of north Qilian fold belt, NW China." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/51578930515655648981.

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28

Liao, Kelley. "Geochemical Diagnostics of Metasedimentary Dark Inclusions: a Case Study from the Peninsular Ranges Batholith, California." Thesis, 2012. http://hdl.handle.net/1911/71667.

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Dark enclaves rich in amphibole and biotite are ubiquitous in granitoid rocks and generally thought to represent fragments of mafic magmas, cumulates or restites. However, magmatic assimilation of metamorphic or sedimentary country rock can also form dark enclaves. To develop criteria for identifying dark enclaves of non-magmatic origin, we investigated dark enclaves from a complete spectrum of light (carbonate- or feldspar-rich) to dark (amphibole-rich, biotite-rich, or composite) enclaves, reflecting progressive thermal and chemical equilibration with host tonalite from the Domenigoni Valley pluton in the Peninsular Ranges Batholith, California. Metasedimentary dark enclaves have a number of major and trace element characteristics that overlap those of literature-compiled igneous dark enclaves. Comparison to modeled igneous differentiation paths shows metasedimentary enclaves can have anomalous CaO and K2O contents for a given SiO2, but other major element systematics may not deviate noticeably from igneous differentiation trends. In addition, the fact that there are literature-compiled mafic enclaves trending towards high K2O and high CaO suggests that not all mafic enclaves are of igneous origin. While the majority of dark enclaves may not be metasedimentary, this work provides some criteria for identifying enclaves should a case of metasedimentary origin arise.
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[Verfasser], Solomon Gebresilassie Gebremariam. "Nature and characteristics of metasedimentary rock hosted gold and base metal mineralization in the Workamba area, central Tigray, northern Ethiopia / Solomon Gebresilassie Gebremariam." 2009. http://d-nb.info/999398962/34.

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"Diffusion of oxygen and lithium isotopes at a contact between the Bushveld Complex and metasedimentary rock: Implications for the timescale of Phepane Dome diapirism." UNIVERSITY OF MARYLAND, COLLEGE PARK, 2009. http://pqdtopen.proquest.com/#viewpdf?dispub=1465548.

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