 | | Journal (article/letter/editorial) | | significance of natrocarbonatites at Oldoinyo Lengai, Tanzania: Composition of lavas from 1988 to 2007”☆...Available online 27 August 2012 Keywords: Oldoinyo Lengai Natrocarbonatite Average composition and compositional...Oldoinyo Lengai, Tanzania, are unique in magmatic petrology. The historical activity of Oldoinyo Lengai has...relationship to the silicate magmas of Oldoinyo Lengai. The “type” natrocarbonatite major and trace element...25 samples with low standard deviation. Oldoinyo Lengai carbonatites are unique in almost all aspects of |  | | Journal (article/letter/editorial) | | significance of natrocarbonatites at Oldoinyo Lengai, Tanzania: Composition of lavas from 1988 to 2007 J...Available online 1 June 2012 Keywords: Oldoinyo Lengai Natrocarbonatite Average composition and compositional...Oldoinyo Lengai, Tanzania, are unique in magmatic petrology. The historical activity of Oldoinyo Lengai has...relationship to the silicate magmas of Oldoinyo Lengai. The “type” natrocarbonatite major and trace element...25 samples with low standard deviation. Oldoinyo Lengai carbonatites are unique in almost all aspects of |  | | Journal (article/letter/editorial) | | forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions V.S. Sekisova...inclusions in minerals of ijolite xenoliths at Oldoinyo Lengai Volcano. Melt inclusions with different phase compositions...above minerals, these inclusions contain halite, sylvite, neighborite, Na–Ca-phosphate, alkali sulfates...ijolite; nyerereite; natrocarbonatite; Oldoinyo Lengai Introduction The East African Rift System, expanding...the Gulf of Aden through Ethiopia, Kenya, and Tanzania, is divided into two large tectonic zones: Western |  | Mangler, Martin F., Marks, Michael A.W., Zaitzev, Anatoly N., Eby, G. Nelson, Markl, Gregor (2014) Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite. Chemical Geology, 365. 43-53 doi:10.1016/j.chemgeo.2013.11.027 | Journal (article/letter/editorial) | | com/locate/chemgeo Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation...Natrocarbonatite Halogen fractionation Bromine TXRF Oldoinyo Lengai Leaching a b s t r a c t Halogen abundances of...and their alteration products from Oldoinyo Lengai (Tanzania) are compared to those of associated silicate...the major Cl- and Br-bearing minerals (mainly sylvite and gregoryite) are easily dissolved, leaving behind...alteration. In the associated silicate rocks at Oldoinyo Lengai concentrations of all three halogens increase from |  | | Journal (article/letter/editorial) | | is located in the Saguenay region of Québec, Canada (Figure 1). This region is comprised of three petrographic...the halite is of marine origin. However, neither sylvite nor gypsum, typical of seawater infiltration, are...carbonatite-related fluid. The best example is Ol Doinyo Lengai, which features salt fumaroles [64]. However...in experiments and natural lavas from oldoinyo lengai. In Carbonatite Volcanism; Springer Nature: Berlin/Heidelberg...43–55. [CrossRef] Von Eckermann, H. The Alkaline District of Alnö Island (Alnö Alkalina Område); A. b. Kartografiska |  | | Journal (article/letter/editorial) | | (Albee, Arden L., et al.) 3-4 491 Properties Halite-sylvite,thermodynamicmodel, quasi-chemical (Green,E. Jewett...JamesR.) Vanadinite.San Carlos (Levitt, S. R., et ol.) 9-10 1s62 Mineral data B-quartz solid solution...Geochemistry, thermodynamic model, phase equilibria, sylvite (Green, E. Jewett.) 9-10 1692 Hammarite New data...lead ions, empty halide sites (Merker, Ludwig, et ol.) 7-8 1435 Germany, Ems, vibrationalspectra (Levitt... properties, optical 5-6 808 (Stumpfl, E. F.) Sylvite Geochemistry, thermodynamic model, phaseequilibria |  | | Book | | regions. Five Islands, Gulf of Mexico. Zagros/Hormuz region, Arabian (Persian) Gulf Salt Dissolution: Solution...chotts and coastal sabkhas in North Africa.801 Sylvite in the Amadeus Basin, Australia.804 Potash from...0 4 2 Shortite 2CaC03.Na2C03 Halite NaCI Sylvite KCI Hanksite 9Na,SO,.2Na,CCLKCI 2 4 2 3 Syngenite...Stromatolite Lakes *b/% Mg 300 ppm 18°C in the Coorong region of South Na 200 ppm -j q " Australia (Figure 4...basins, such as the Messinian of the Mediterranean region. In¬ stead, the isopachous precipitative facies |  | | Journal (article/letter/editorial) | | not known. Halides, notably halite (NaCl) and sylvite (KCl), must have formed on Earth’s first shorelines...and Kjarsgaard 2008), whereas the Ol Doinyo Lengai volcano in Tanzania continues to erupt low-viscosity...Precambrian Aravalli phosphorite deposits of the Udaipur region, their environmental significance and genesis of |  | | Book | | coccoliths. From plankton sample of the Kimberley region, Australia, kindly provided by CSIRO Tasmania (picture...which the transport medium can move from the source region to the locus of ore precipitation; 5 an energy...evaporates, such as halite, potash salt (especially sylvite and carnallite), gypsum and anhydrite. 5 Metamorphic...crystal faces of the cube {100}. Kondjor, Chabarowsk district, Eastern Siberia, Russia hexagonal with 6/m2/m2/m...deposits of the Namib Desert and in the offshore region of Namibia. Many occurrences of diamond are known |  | | Book (edition) | | Siderite 11.10 Rhodochrosite 11.11 Halite 11.12 Sylvite 11.13 Gypsum 11.14 Anhydrite 11.15 Chert and agate...hidden by a nebular disc of material (diagonal dark region) similar in mass and size to the one that formed...lower side by the 660 km seismic discontinuity. The region between this depth and another prominent discontinuity...capable of moving, albeit very slowly. In this region, heat can be transferred by moving hot low-density...triple junction may be present beneath the Afar region of Ethiopia, with the Red Sea and Gulf of Aden |  | | Book | | fossil bacterial cell was found in seafloor chert. ol Classification of fossils Once placed nto intoits...aero men 4 . A A have been found in 4 the Isua region of ieGreenland. Earth's oldest rocks s é These...radioactive Pee Mee CUA PRUE cd Ch ne ccm RR ol La Ug CER Peed TERTIARY Cry CRETACEOUS Archaeopteryx...layer, for example, is younger than ca RolaMi ee ol ole aR a Rela |e a If this sequence is cut by...em Leta Mae Re SCENE ella) eco) RN Le Meer) CUS ol es Gare aec le ues Mar hele tury URC) Pree Reece |  | | Report (volume) | | Carbonatite lava flow from an eruption of Oldoinyo Lengai, Tanzania. Photo courtesy of Tobias Fischer. Series...more than 10,000 prospectors to the semi-desert region, and inevitably led to the recognition of diamond...Coal Mine 45, Kopeisk, Urals R3 Is River, Isovsky District, Urals C C I, To MCo CoF Pla I M M N, Ta Pla...Luobusha ophiolite complex, Autonomous Tibetan Region; (2) within the Mengyin kimberlite field, Linyi...three carbides that are unknown from any other region: qusongite (WC; Fang et al. 2009; Shi et al. 2009) |  | | Book (volume) | | volume and quality of gemstones being mined in that region. As new localities are identified and new gemstones...localities or gemstones may lose their appeal or a region may become unproductive – so the market can be...mineral zoisite), which was discovered in 1967 in Tanzania and is now available through many retail outlets...of Afghanistan, the Sverdlovsk region of the Urals, and the Altai region of north-western China. Gems formed...sapphires (Mogok), Pakistan rubies (Hunza Mountains), Tanzania rubies (Morogoro), and Vietnam rubies (Luc Yen |  | | 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 “region”; 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 | | solids from a gas depend on temperature. In that region of the nebula occupied by the terrestrial planets...also have pushed ionized gases out of the inner region of the nebula. Again, there is a possibility that...up by this mass loss could have swept the inner region of the nebula clear of uncondensed gases. Planet...near the poles differs from that in the equatorial region. The succession of strata in the layered deposits...broadly correspond to terrestrial rocks in the region of the core/mantle boundary at 2900km (1800mi) |  | | Book (edition) | | the city limits, but also to the sur¬ rounding region. Terms for materials in GeoRef, for example, "iron...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 |  | | Book | | ... ,~. fro ........ , ~= ,II ol<,,'!p>I_.......) .11 ~ ••, .. < mI'J< "'101 ~"K' """ ,'" ol<"~",""",'" _ ..."........ ~. _ ,"" """"'."'n ....,"" ..,.. .... 'Of""" '''''''.-1 ,,ol, ..... '''l! .. h .. """"", '" ,..-.:I><'"'~I) '...continental crust, it is useful to begin by defining the region under consideration and to provide some generalities...rocks may not be representative of their source region. These elements include the alkali and alkaline-earth |  | | Book | | were discovered in 1967 near Arusha, Tanzania. Zoisite Tanzanite Tanzania The most valuable examples...the ancient sea that once covered much of this region. ▼ CHAPTER 4 Rocks (t)CORBIS, (bl)Martin Miller...fertilizers for farms and gardens. For example, sylvite, a mineral that forms when seawater evaporates...building stone. You might know of buildings in your region that are made from granite, limestone, or sandstone...atoms B) neutrons D) heavy atoms 13. What is a region where many windmills are located in order to generate |  | | Book | | position of 56Fe; and (iv) the abundance peaks in the region past iron at the neutron closed shell positions...mixing caused by the convection, the entire unstable region evolves essentially chemically homogeneously—replenishing...of burning region (central or shell burning) and depleting the fuel elsewhere in that region at the same...burning of this fuel then commences outside that region. Table 1 summarizes the burning stages and their...maximum temperatures that have been reached in each region in the preceding hydrostatic burning stages (Table |
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