991 resultados para Brydone, P. (Patrick), 1736-1818


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Mode of access: Internet.

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Series title in part at head of title.

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Photocopy.

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Mode of access: Internet.

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--4. th. Traurige schiksale der madame Godin des Odonais auf einer reise von Riobamba unweit Fuito in Peru durch das Amazonenland. Das interessanteste aus Johann Carvers reisen, durch die innern gegenden von Nordamerika. 1796.--5.--6. th. Wilhelm Isbrand Bonteku's merkwürdige abentheuer auf einer reise aus Holland nach Ostindien. Beschreibung einer reise um die erdkugel, angestellt von dem englischen schifskapitain Cook, und den gelehrten Banks und Solander in den jahren 1768-1771. 1794, '91.--7. th. P. Brydone's reise durch Sicilien und Malta, im jahr 1770. 1793.--8. th. Reise des herausgebers von Braunschweig nach Paris im heumonat 1789. 1790.--9. th. [Ein bericht von den Pelju-inseln, nach den aufzeichnungen des kapitain Wilson aus dem jahr 1783. 1792.--10.--11. th. Le Vaillants reise in das innere von Afrika, vom vorgebirge der Guten Hofnung aus, in den jahren 1780-1785. 1792-93.--12 th. Herrn von Lesseps reise, durch Kamtschatka und Sibirien, im jahre 1788. 1793.

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Plates described on p.[433]-459 issued only with the folio edition.

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This is a metamorphic study of mid-P anatectic aluminous gneisses from the Manicouagan and lac du Milieu areas of the central Grenville Province. The rocks are derived from hydrothermally altered felsic protoliths and were metamorphosed at granulite facies conditions during the Grenvillian orogeny. The samples come from three locations separated by several tens of kilometers and exhibit a wide range of textures and bulk compositions. However, they all have the same peak mineral assemblage: garnet + biotite + quartz + K-feldspar +/- plagioclase +/- sillimanite with retrograde cordierite in some, and show evidence of partial melting and melt loss. In terms of mineralogy and bulk composition, the samples were divided into two groups, sillimanite-rich and sillimanite-poor, with a high and low Alumina index in the AFM space, respectively. Phase equilibria modeling in the Na₂O–CaO–K₂O–FeO–MgO–Al₂O₃–SiO₂–H₂O– TiO₂–O (NCKFMASTHO) system using Thermocalc constrained the PT field of the peak mineral assemblage at 800–900ºC and 6–11kbar, with melt solidification in the range of 800–865ºC and 6–8kbar. The presence of sillimanite inclusions in garnet, and of only scarce, retrograde cordierite, is consistent with moderate dP/dT gradient ‘hairpin’ P T paths, which were similar between the three locations. This study also investigated the role of Fe3+ on phase stability in mid-P aluminous systems. Fe³⁺ is problematic because although it is incorporated in the NaCKFMASTHO system, it is rarely measured in modeled minerals and rocks and its value is generally assumed. Biotite may contain significant amounts of Fe³⁺, and these were analysed by Mössbauer spectroscopy in selected samples, where they were found to be low (0-4%). In addition, the effect of increasing the bulk Fe³⁺ in the mid-P portion of phase diagrams was modeled. This increase added new minor phases and changed the phase proportions, as well as shifted phase boundaries to a small degree, but PT paths remained largely unaffected. Finally, the two methods commonly used in phase equilibria modeling to account for melt loss were compared. In some cases there were major differences in the topologies between the ‘melt reintegration’ and ‘adding water’ methods, but the former method is the most consistent with the rock data, and should be the method of choice.

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This synthesis dataset contains records of freshwater peat and lake sediments from continental shelves and coastal areas. Information included is site location (when available), thickness and description of terrestrial sediments as well as underlying and overlying sediments, dates (when available), and references.