 | | Journal (article/letter/editorial) | | pegmatites and plagiogranites in the Porthoustock region. Mineralogical layering is restricted to two small...ilmenites Lizard Trelon borehole ilmenite /% Thingmuli volconies ilmenite O Skoergaard ilmenite 9 Abyssal... Natland from Natland et al. 1991). Thingmuli volcano in Iceland (Carmicheal 1967); Fe-Ti oxide gabbros...only the most evolved rocks of Skaergaard and Thingmuli (ferrodacites and rhyodacites respectively) and...dacites of the Galapagos spreading centre and Thingmuli. The inferred low pressure origin for the Fe Ti |  | | Journal (article/letter/editorial) | | Creasey, 1958), the Cyprus ore depositsin the Eastern Mediterranean (Constantinou and Govett, 1972),...tinuousprocessis broken into steps:(1) heating of (clinochlore)to precipitate. Chlorite and chrysotile seawater...aswell asin hydrothermally alteredbasalts(e.g., Iceland, Bjornsson et al., 1972). The calculatedmineral...altered basaltsfrom the geothermalfield at Reykjanes,Iceland (Bjornsson et al., 1972). The presence of anhydrite...Economicevaluation of Reykanesthermal brine area, Iceland: Am. Assoc.Pe- troleumGeologists Bull., v. 56 |  | | Report (issue) | | Six Tectonic development of the Solomon Islands region 103 Geology of other islands in the Solomons Chain...and the Shortland Islands 4 4 Balhymetry of the region around Choiseul and the Shortland Islands 7 5 Regional...9 6 Bouguer gravity field in the Solomon Island region 10 1 2 7 8 Geological provinces of the Solomon...tectonised equivalents of the basalts. In central and eastern Choiseul fine-grained schists are associated with...dislocation of variable inclination. At the south-eastern extremity of Choiseul there is evidence of the |  | | Book | | or volcanic eruptions, occurring in a specified region or time interval and must satisfy the following...following conditions:1. The number of events in one region or time interval is independent of those occurring...an extremely small region or time interval is proportional to the size of the region or length of the time...than one event occurring in the extremely small region or short time interval. In practice the specified...probability that there will be x events in the specified region or time interval is then given by:Ρ(χ) = ( θ ^ |  | | Book | | and geology of the Precambrian Aldan shield in Eastern Siberia; origin of lapis lazuli and phlogopite...fully to mapping several areas in Kazakhstan and eastern Siberia. During these years he first conceived...study conditions of the metamorphic formations in eastern Siberia, Dmitriy Sergeyevich discovered a number... L.Ya., Podlesskii, K.K. et al. Aldan Shield, eastern Siberia, USSR. J. Metamorphic Perchuk, L.L. & Fed'kin...in the central Volodarsko— Volyinsky pegmatite region (after Panchencko, cited from Lazarenko et al. |  | | Book (edition) | | Pyrophyllite 202 Talc 204 Chlorite Group 208–215 Clinochlore, chamosite 208 iii Downloaded from https://pubs...the extension of the Mid-Atlantic ridge between Iceland and Jan Mayen. The extremely low Fa content of...green mica, Benson no. 4 Pegmatite, north Mtoko region, Zimbabwe (Hornung, G. & Knorring, O. von, 1962...skarn, Hallinmäki borehole, Virtasalmi area, eastern Finland (Hyvärinen, L., 1969, Bull. Comm. géol...(clinopyroxene) + SiO2. The shaded area is the apparent region of ‘bracketing’ of metamorphic pressure and temperature |  | | Book | | (Lasaulx in 1876) 12 agate, Iceland ig. extra. 1. Obsidian from Iceland. 2. Grayish or brownish variety...admixed with associated rock materials, found in the region of the Caspian Sea. [Tartar origin, possibly related...of a microscopic felt. [Allochet Valley, Monzoni region, Italy] (Ippen in 1903) alluvium sed. General term...an area of about 200,000 sq. mi. in the Deccan region of southeastern India. basalt, enstatite ig. extra...the intertidal zone in a tropical or subtropical region, cemented with calcium carbonate. basanitoid ig |  | | Book (volume) | | CoDer. 7 Chrysolite, picrite basalt, Thingmuli, eastern Iceland (Carmichael, 1964). Anal. I. S. E. Carmichael...Tertiary and Quaternary rocks of the Izu-Hakone region, Japan; by Himmelberg and Coleman (1968) for Cr...at Perseverance, Western Australia, located in a region of amphibolite facies metamorphism, the P- T conditions...following scheme: O r----- 4Mg 3ShOs(OH). acceptor region - 9Mg 2Si0 4 [6Mg tlSi] [16H] 6Mg 3ShOs(OH). ...sAbSbOlo(OH)s - 10Mg 2Si0 4 + Mg 2Al 4SisOs clinochlore forsterite c1inochlore forsterite cordierite |  | | Book (volume) | | top of rbyolite lava, H olmanes, Reydarfjordur, eastern lcelaod (Carmichael, 1963). Anal. I. S. E. Ca.nrucbael...and McLelland, 1973). In the southern area of the region the orthopyroxene shelJ is succeeded by a partial...and spinel while in the north-east area of the region the outer shell consists of garnet. The origin...pyroxene-hornblende and pyroxene granulites, Saltora, eastern India, range from 0· 56 to 0· 61. A more recent...temperature, comparisons of pyroxenes from one region to another is 66 Single-Chain Silicates: Pyroxenes |  | | Book | | Compositions of basalt glasses from the Narrowgate region of the FAMOUS valley, Mid-Atlantic Ridge Geochemical...trends of volcanoes on the Galapagos Islands and Iceland, both of which straddle oceanic ridges The island...at relatively high temperatures. a = stability region for sanidine, b = stability for orthoclase, c =...18.4 Distribution of metamorphic facies in the Eastern Goldfields subprovince of the Yilgarn Archean province...Modified after Buchan et al. (2007). 200 km in eastern California, consists of hundreds of separate plutons |  | | Book (edition) | | exposed by deep erosion of the roots of a volcanic region. These coarse-grained rocks of basaltic composition...and effect. If subsequently the rocks from such a region are exposed at the surface it may very well be...volcanic 'ash' of the right con1position in the root region underlying a volcano; while it is well within the...African alkali volcanic province in the Rift Valley region. It is a mineral of high-temperature formation...District in Australia and lava fields in Central and Eastern Africa. The mineral lends its name to two rock-types | | | Book (edition) | | exposed by deep erosion of the roots of a volcanic region. These coarse-grained rocks of basaltic com¬ position...and effect. If subsequently the rocks from such a region are exposed at the surface it may very well be...volcanic ‘ash’ of the right composition in the root region underlying a volcano; while it is well within the...African alkali volcanic province in the Rift Valley region. It is a mineral of high-temperature formation...District in Australia and lava fields in Central and Eastern Africa. The mineral lends its name to two rock-types |  | | Book | | these two sources of energy is continuous in the region of steep thermal and chemical gradients near the...relatively short time span, but viewed as a whole [region] the metalli¬ zation was of long duration’ (p....world’s greatest concentration of kimberlites, in eastern and southern Africa, range from 2,035 m.y. (in...manganese from the deeply weathered Krivoy Rog region is assured, but so is the supply of iron. The precise...Paleozoic fold belts of Kazakhstan and the Uzbek region, USSR, where there are large deposits. Numerous |
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