485 resultados para GRANITE PEGMATITES
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Four letters on topics including the Granite Railway project, Tudor’s thoughts on expanding trade in South America, domestic politics, and the process for appointing Americans to diplomatic posts.
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This layer is a georeferenced raster image of the historic paper map entitled: Map of the discoveries in Australia : copied from the latest M.S. surveys in the Colonial Office, by permission dedicated to the Right Hon.ble Viscount Goderich, H.M. principal Secretary of State for the Colonies, and President of the Royal Geographical Society, by his Lordships obliged servant J. Arrowsmith. It was published by Pubd. by J. Arrowsmith, 35 Essex St., Strand in Feb. 15 1834. Scale [ca. 1:3,041,280]. Covers southeastern Australia with additions to the east of the Gulf of St. Vincent and Granite Island inserted in Encounter Bay.The image inside the map neatline is georeferenced to the surface of the earth and fit to the Asia South Lambert Conformal Conic coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features, and more. Relief shown by hachures and spot heights. Major explorations shown. Includes also notes and insets: The Colony of Western Australia ... -- [Map of Australia in Asia].This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.
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Lithium is used in the cathode and electrolyte of rechargeable batteries in many portable electronics and electric vehicles, and is thus seen as a critical component of modern technology (Gruber et al., 2011). Electric vehicles are promoted as a way to reduce carbon emissions associated with the transportation sector, which accounts for 14.3% of anthropogenic greenhouse gas emissions (OECD International Transport Forum, 2010). However, the sustainability of lithium procurement will influence the overall environmental impact of this proposed “green” solution. It is estimated that 66% of the world’s lithium resource is contained in natural brines, 24% in pegmatites, and 8% in sedimentary rocks such as hectorite clays (Gruber et al., 2011). It has been shown that “[r]ecycling of lithium from Li-ion batteries may be a critical factor in balancing the supply of lithium with future demand” (Gruber et al., 2011). In an attempt to quantify energy and materials consumption associated with production of a unit of useful lithium compounds, industry reports and peer-reviewed scientific literature concerning lithium mining and lithium recycling were reviewed and compared. Other aspects of sustainability, such as waste or by-products produced in the production of a unit of useful lithium, were also explored. Thus, this paper will serve to further the evaluation of the comparative environmental consequences associated with lithium production via extraction versus recycling. Efficiencies must be made in both processes to maximize productivity while minimizing ecological harm.
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The Itremo region in Central Madagascar comprises a deformed metasedimentary sequence (Itremo Group) that has undergone greenschist to lower amphibolite facies metamorphism. During a first phase of deformation (D1) Itremo Group sediments were deformed into a fold-and-thrust belt and transported toward the E to NE on top of migmatitic gneisses rocks of Anatananarivo block. A second phase of deformation (D2) affected both the fold-and-thrust belt and structurally underlying units, and formed large-scale N-S trending folds with steeply dipping axial planes. A Late Neoproterozoic Th–U–Pb XRF monazite age (565±17 Ma) dates the emplacement of a granite that truncates first-phase structures in the Itremo Group, and indicates that the fold-and-thrust belt formed prior to ≈565 Ma. Th–U–Pb electron microprobe dating was applied to elongated monazites that lie within the first-phase foliation of Itremo Group metapelites. The detrital cores of zoned monazites reveal two distinct age populations at ∼2000 and 1700 Ma, the latter age giving a maximum depositional age for the Itremo Group. Statistical analysis of ages determined from the rims of zoned monazites and from unzoned monazites indicates three Late Proterozoic–Early Paleozoic monazite growth events at about 565–540, 500 and 430 Ma. The oldest age population is contemporaneous within error, with the intrusion of the dated granite. The two younger age populations are found both in the Th–U–Pb and Ar–Ar data; together with the perturbation of the Rb–Sr system we interpret both ages as due to alteration related to fluid circulation events, possibly connected to the emplacement of pegmatite fields in Central Madagascar. Syn-D1 tectonic growth of contact metamorphism minerals such as andalusite has been observed locally in metapelites along the margin of Middle Neoproterozoic (≈800 Ma) granites, suggesting that D1 in the Itremo Group is contemporaneous with the intrusion of granites at ≈800 Ma. The N-S trending D2 folds are associated with ≈E-W shortening during the final assembly of Gondwana in Late Neoproterozoic–Early Cambrian times.
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Ferrosilite-fayalite bearing charnockite and biotite-hornblende bearing granite are exposed in Mühling-Hofmannfjella, central Dronning Maud Land of East Antarctica. Both are interpreted as essentially parts of a single pluton in spite of their contrasting mineral assemblages. Based on petrologic and geochemical studies, it is proposed that H2O-undersaturated parent magma with igneous crustal component that fractionated under different oxygen fugacity conditions resulted in the Mühlig-Hofmannfjella granitoids.
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Characteristic black nodules have been retrieved in 1922 from the bed of the Kichijo River, that runs along the Tanakamiyama mountain in the Oni Province and ends into Lake Biwa in Japan. Their radiocativity has been studied along with that of crusts of similar nature found covering rock formations in the vicinity overlooking the stream. The high content in radium observed may be due to the high uranium content of the granite host rock typical of the Tanakamiyama formation.
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Reprinted from the Granite monthly, Nov. 1902, v. 23, no. 5.
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Udgivet for Fridtjof Nansens fond.
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No numbers published, Sept. 1906-Sept. 1911 inclusive.
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Description based on: Vol. 7, no. 1 (June 1893)
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The evolution of the Scot.--The kirk and its story.--Education in school and college.--The law and the lawyers.--Architecture, ecclesiastical and other.--Painting and painters.--Literature.--"Edina, Scotia's darling seat."--The kingdom of Fife.--In Lothian fields.--The Lothian shore.--The city of St. Mungo.--The Clyde.--Burns and the Burns country.--The legend of the Covenant.--Yarrow and Traquair.--The Border and the Solway.--Stirling and Perth.--Dundee.--The Granite city.--A highland survey.--A note on Caithness.--Round the islands.--Sports and pastimes.--Music, old and new.--Scots food.--Scots drink.--Scots wit and humour.--The Scot abroad and the stranger in Scotland.
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On verso: The 1st set in the first show in Lydia Mendelssohn Theater "Granite" used about early 30's, '31 or '32
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401 Depot Street, Ann Arbor, Michigan 48104 (313) 769-0592. This magnificent 1886 Michigan Central RR depot of colorful Michigan granite now offers a glass walled trackside room, an elegant baggage scale room, the Roundhouse Saloon and some of the most romantic dining "on the line".
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Printed by order of the town.
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Mode of access: Internet.