 | | Book | | basic understanding of the geology of an area or region will never happen without initial observation of...Socotra (Yemen) Somalia South Africa Sudan Swaziland Tanzania Togo Tunisia Uganda Western Sahara (under Moroccan...coltan (columbite-tantalite), diamond, gold, 4 manganese, phosphate rock, platinum-group metals (PGM),...(1872) on East Africa, in which the Great Lakes region of central eastern Africa is very poorly ļ¬gured...the rift grabens of southern Kenya and northern Tanzania. Notably is a detailed geological map at a scale |  | | Report (issue) | | Industrial minerals and rocks of the tri-state border regionā West Texas, southern New Mexico, and northern...AbstractāIndustrial minerals and rocks in the tri-state border region are located in a variety of geologic environments...Ciudad Juarez, whose market stretches throughout the region and beyond. Other construction materials include...Adobe buildings are still common throughout the region, in contrast to the soft, Tertiary volcanic tuff...importance. Included here is potash of the Carlsbad district of southeastern New Mexico and Frasch sulfur production |  | | Book | | Galapagos spreading centre (Corliss et al., 1979). Manganese, largely absent from the hydrothermal mounds,...ProjectāMineral Exploration in Northern Tanzania PO Box 641, Arusha, Tanzania 1981 ay ACADEMIC PRESS Harcourt...Office, Arusha, Tanzania in the UN-assisted Project-Mineral Exploration in Northern Tanzania for preparation...G. Mitchell Kathmandu, Nepal M.S. Garson Arusha, Tanzania 7 Si) I": it Uy k ā Py ' pry ah j...associated mineral deposits characteristic ofsa stable region were often tectonically juxtaposed with and even |  | | Report (volume) | | 13 Seasonal diagenetic changes in salts of Owens Lake, California, 1970-77, by George I. Smith and Irving...Irving Friedman 21 Influence of iron and manganese on the chemical partitioning of copper, zinc, and chromium...Diagenesis of the Morrison Formation, Smith Lake uranium district, McKinley County, New Mexico, by NeilS....Member of the Morrison Formation, Grants uranium region, northwestern New Mexico, by Paula L. Hansley 265...oxide, no overall trends are apparent. For some oxides the Archean shales are more like Phanerozoic than |  | | Book | | MARINE ENVIRONMENTS The Modern Thrornbolites of Lake Clifton, Western Australia L. S. Moore and R. V...Marine Environments THE MODERN THROMBOLITES OF LAKE CLIFTON, WESTERN AUSTRALIA L.S. MOOREI and R.V....microbialites are presently forming in Lake Clifton, a marine-derived coastal lake in southwestern Australia. The...far the most predominant form of microbialite in Lake Clifton, with small stromatolites restricted to...primarily the product of the environmental setting. In Lake Clifton, seasonal fluctuations in water depth, regional |  | | Book (edition) | | and A. Holmes (1950) : Tanzania Geological Survey and N. J. Guest (1954) : Tanzania Geological Survey and...Tidsskrift and K. S. Heier (1961) Figure 15-9: Tanzania Geological Survey and N. J. Guest (1954) Figure...(1919, 1921) considered the calcite of the Laacher Lake Ausfwiirflinge to be magmatic and indeed called...Bildung analog den Pegmatiten.ā Chilwa Island in Lake Chilwa, Nyasaland, was first examined geologically...unexposed) core carbonatite. Examples are Lackner Lake, Ontario (cone-sheet), Shawa, Southern Rhodesia |  | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . . . . . . . . Manganese . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . 10.2. Magmatic manganese deposits . . . . . . . . . . . . . . . . . . ...Structure-related manganese deposits . . . . . . . . . . . . . . . . . . . . . 10.4. Sedimentary manganese deposits...Metamorphic manganese deposits . . . . . . . . . . . . . . . . . . . . . . . 10.6. Manganese supply and...which cover more than 2/3 of the Earth surface. Manganese nodules are widely known as a potential source | | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . . . . . . . . Manganese . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . 10.2. Magmatic manganese deposits . . . . . . . . . . . . . . . . . . ...Structure-related manganese deposits . . . . . . . . . . . . . . . . . . . . . 10.4. Sedimentary manganese deposits...Metamorphic manganese deposits . . . . . . . . . . . . . . . . . . . . . . . 10.6. Manganese supply and...which cover more than 2/3 of the Earth surface. Manganese nodules are widely known as a potential source |  | | Book | | . . . . . . . . . . . . . . . . . . . . 1.2.2 Oxides and Hydroxides . . . . . . . . . . . . . . . ....(Fe) . . . . . . . . . . . . . . . . . . . 2.1.2 Manganese (Mn) . . . . . . . . . . . . . 2.1.3 Chromium... . . . 5.5 Sedimentary Manganese Deposits . . . . . . . . . . . 5.6 Manganese Nodules . . . . . . . ... Research trips led him to Oldoinyo Lengai in Tanzania, through the High Atlas in Morocco, and to the...East African carbonatites led him to Uganda and Tanzania. He works at CRB Analyse Service GmbH in Hardegsen |  | | Book | | might be all aluminium compounds, or the aluminium oxides and hydroxides, or the anthraquinones. Second,...that it is an early example of a quercitron (q.v.) lake (dye derived from Quercus tinctoria on an inorganic...twelfth century Romanesque frescos of the Pyrenean region of Catalonia and in Andorra (Casas, 1991; Porta...lepidocrocite (Yabuki and Shima, 1979). Iron group; Iron oxides and hydroxides group; Goethite; Lepidocrocite Mackay...continues to be, used as a dye in the preparation of lake pigments. It is catalogued by the Colour Index as |  | | Report (issue) | | titanium 47.88 vanadium 50.94 chromium 52.00 manganese 54.94 iron 55.85 cobalt 58.93 nickel 58.69...Front cover (clockwise starting at top left). Dry Lake Wind Power Project. This 63-megawatt-capacity facility...C), hafnium (Hf), indium (In), lithium (Li), manganese (Mn), niobium (Nb), platinum-group elements (PGE)...number of these commoditiesāfor example, graphite, manganese, niobium, and tantalumāthe United States is currently................................. K1 Chapter L. Manganese By William F. Cannon, Bryn E. Kimball, and Lisa |  | | Book | | "Broadly regarded, the depth ta which a metalliferous region has been eroded affects its present characteristics...rock; (4) pervasive alteration and disseminated Fe oxides; (5) evidence of a high content of volatile material...Batholith near Arequipa, Toquepala-Cerro Verde district; in the centre, Morococha and in the north, Michiquillay)... NORTH LAKE BALKHASH (PRIBALKHASH) REGION, KAZAKHSTAN, U.S.S.R. This is an outstanding region of Permo-Carboniferous...interpreted as marking the cores of stratovolcanoes. The region is densely mineralized and contains the principal |  | | Book | | 265 274 Vermiculite 145 Magnesite & magnesia Manganese minerals 255 Titanium & zirconium minerals ...in this book. More than 90% of manganese goes into steel, but manganese also has dozens of nonmetallic...major producing districts, or a representative district if there are many. We name the chief mining companies...graphite supply must come not merely from one district but from a single mine. Thus the physical properties...compressed, molded, or cast products. balt, and manganese occur in all asbestos minerals, due part- ly |  | | Book (edition) | | Corbeil, Canadian Conservation Institute; Susan Lake, Hirshorn Collection; Dr Claudio Seccaroni, ENEA...might be all aluminium compounds, or the aluminium oxides and hydroxides, or the anthraquinones. Second,...that it is an early example of a quercitron (q.v.) lake (dye derived from Quercus tinctoria on an inorganic...twelfth century Romanesque frescos of the Pyrenean region of Catalonia and in Andorra (Casas, 1991; Porta...lepidocrocite (Yabuki and Shima, 1979). Iron group; Iron oxides and hydroxides group; Goethite; Lepidocrocite Mackay |  | | Book | | shoals adjacent to the Chari delta feeding into Lake Chad seem to relate directly to rubified (reddened)...especially kaolinite, and iron oxides. The red and brown iron oxides in laterites sometimes form more...working as an iron ore. In south-east Asia the iron oxides frequently occur as pisoliths, spherules and nodular...Carboniferous, Scotland. An aggregate (clear) of aluminium oxides and hydroxides, within which early diagenetic sphaerosiderite...precipitation and diagenesis in the sediments of the Lake Bogoria basin, Kenya Rift Valley. In Sedimentation |  | | Book (edition) | | shoals adjacent to the Chari delta feeding into Lake Chad seem to relate directly to rubified (reddened)...especially kaolinite, and iron oxides. The red and brown iron oxides in laterites sometimes form more...working as an iron ore. In south-east Asia the iron oxides frequently occur as pisoliths, spherules and nodular...Carboniferous, Scotland. An aggregate (clear) of aluminium oxides and hydroxides, within which early diagenetic sphaerosiderite...precipitation and diagenesis in the sediments of the Lake Bogoria basin, Kenya Rift Valley. In Sedimentation |  | | Book | | "Broadly regarded, the depth to which a metalliferous region has been eroded affects its present characteristics...rock; (4) pervasive alteration and disseminated Fe oxides; (5) evidence of a high content of volatile material...Batholith near Arequipa, Toquepala-Cerro Verde district; in the centre, Morococha and in the north, Michiquillay)... NORTH LAKE BALKHASH (PRIBALKHASH) REGION, KAZAKHSTAN, U.S.S.R. This is an outstanding region of Permo-Carboniferous...interpreted as marking the cores of stratovolcanoes. The region is densely mineralized and contains the principal |  | | Book | | seen in aragonite (light and dark orange). (A Ć¾ D) Region A exhibiting polycrystalline calcite within the...calcite overgrowth crystal in the inset. (B Ć¾ E) Region B with a crack running through the crystal with...observed in the outer parts of the fracture. (C Ć¾ F) Region C shows calcite crystals (light blue color) extending...orientation of the reaction front in that particular region. The crystallographic directionality of the apatite...and altered parts as well as from the interface region showed that the crystallographic orientation of |  | | Book | | powdered, dissolved in acids, and precipitated as oxides, dried, and weighed. Pure samples produced accurate...land surface, freshwater lake, or shallow sea; into a saline, alkaline lake; or into the ocean. LAND...hyd ,olog,ic system, because th,e water enters the lake and can only leave by evaporation. The zelolite...kaline lakes, are zoned ~ om the edge of the former lake to the center" reflecting the differences in, chemical...pH of the water in the lake (Fig. 2). Ash that falls ,on the shore of the lake is not alt1ered. Ne,ar | | | Book | | powdered, dissolved in acids, and precipitated as oxides, dried, and weighed. Pure samples produced accurate...land surface, freshwater lake, or shallow sea; into a saline, alkaline lake; or into the ocean. LAND...hyd ,olog,ic system, because th,e water enters the lake and can only leave by evaporation. The zelolite...kaline lakes, are zoned ~ om the edge of the former lake to the center" reflecting the differences in, chemical...pH of the water in the lake (Fig. 2). Ash that falls ,on the shore of the lake is not alt1ered. Ne,ar |  | | Book (edition) | | imparted by transition elements, especially iron, manganese, titanium, chromium, and copper. Despite its many...rock mass; (2) a concretionary lump of manganese and iron oxides found on ocean bottoms. occurrence The...certain positions in the periodic table; iron and manganese are transition elements whose electronic structure...Colorado at the Pelican Dives mine, Silver Plume district, and at the Little Emma mine, Clear Creek County;...lode, Summit County, and in the Cripple Creek district. It is also found in Canada; Mexico; Bolivia; |  | | Book (edition) | | within the city limits, but also to the surrounding region. In this edition of the Thesaurus, names of cities...newly added are followed by the word āregionā; e.g., Stripa region. Names of materials, when used as GeoRef... isochrons isotopes SA SA Abruzzi Autonomous region on the Adriatic Sea. CO N414000N425500 E0144800E0130000...Islands Adalia use Antalya Adamawa Administrative region in N. BT Cameroon adamellite As of 1981, includes...changed from Greece to Mediterranean region. BT Mediterranean region SA Greek Aegean Islands Between Greece | | | Book (edition) | | imparted by transition elements, especially iron, manganese, titanium, chromium, and copper. Despite its many...rock mass; (2) a concretionary lump of manganese and iron oxides found on ocean bottoms. occurrence The...certain positions in the periodic table; iron and manganese are transition elements whose electronic structure...Colorado at the Pelican Dives m.ine, Silver Plume district, and at the Little Emma mine, Clear Creek County;...lode, Summit County, and in the Cripple Creek district. It is also found in Canada; Mexico; Bolivia; |  | | Journal (issue) | | Gold Coast (Ā£1 Ā·2 million), where the value of manganese exported in-creased although the tonnage fell;...pressure of the oxygen in equilibrium with the iron oxides as a result of expulsion of volatlles (Kennedy...of all analyses on the well-known magnesia, iron oxides, alkalis triangular diagrams (Figs. 6, 7). In both...continuous variation in the relative proportions of iron oxides and magnesia in the series picrite-basalts [28...the alkalis corner, continuous enrichment in iron oxides with respect to magnesia is accompanied by a progressive |  | | Book (edition) | | the surĀ¬ rounding region. Terms for materials in GeoRef, for example, "iron oxides" and "isotopes", almost...Aberfeldy Term introduced in 1989. Town and mining region in Tayside, central Scotland; oil field in Lloydminster...in GeoRef (see Introduction, p. vi). Autonomous region on the Adriatic Sea. CO N414000N425500 E0144800E0130000...SA Aleutian Islands Adalia use Antalya Adamawa Region in W Africa, now part of N central Cameroon and...BA Proterozoic BT Precambrian Adrar Interior region in W Mauritania near Western Sahara border. BT |
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