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| 134(2) c = 5.352(1) X-ray Powder Pattern: Mbozi complex, Tanzania. 3.15 (100), 8.53 (70), 2.732 (50), 2.605... (1) Vali-Tarama Valley, Ukraine. (2) Mbozi complex, Tanzania; corresponds to 3+ (Na1:47 K0:56 )§=2:...In sodium-metasomatized alkalic gneisses and nepheline syenite dikes; in eclogite metamorphosed to the...the amphibolite facies. Association: Nepheline, aegirine, oligoclase, microcline, nybÄoite. Distribution:...the Mbozi syenite gabbro complex, 80 km southwest of Mbeya, Tanzania. From the Darkainle complex, Borama |
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| of the Neoproterozoic Gagwe lavas and Mbozi complex, Tanzania and the assembly of Gondwana Joseph G....Arbor, M148109, USA c Tanzania Division of Mines and Geology. Dodoma, Tanzania Received 16 August 1994;...Ma Gagwe-Kabuye lavas and the 743 Ma Mbozi gabbro-syenite complex of the Congo Craton in East Africa were...paleomagnetic pole obtained from these rocks. The Mbozi complex pole yields a paleomagnetic pole at 46°N, 325°E...significantly from a previously determined pole for the Mbozi complex. A comparison of these paleomagnetic poles to |
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| metasomatized by nepheline syenite magmas was replaced by intergrowths of nepheline and vesuvianite or...are developed in narrow zones along miaskitic nepheline syenite pegmatites emplaced within the Seiland...clinopyroxene and sphene; 2) fenites containing nepheline, clinopyroxene or vesuvianite and calcic amphibole...Tysseland 1979). This forms a zone 30 cm wide along a nepheline syenite pegmatite cutting olivine metagabbro on...discovered within the metasomatic aureole of a nepheline syenite pegmatite at Bekkar~ordnes (Barth 1927 |
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| composition of amphiboles may occur in a given complex. A subtrend found only In oversaturated complexes...variation of amphiboles from the Topsalls-St. Lawrence complex (Strong and Taylor, 1984) illustrated III (a) the...different sources for these granites. Cauro-Bastelica complex Amphiboles in the hypersolvus and fayalite-bearing...fayalite-bearing granites of the Cauro-Bastelica complex, Corsica (Giret et aI., 1980) exhibit a very limited range...and annite in mariolitic cavities. Mahe complex The Mahe complex, Seychelles (Hoshino, 1986) consists of |
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| (Malawi): 3; Murite (Mozambique); 4; Ntaka Hill (Tanzania). Abbreviations: Archaean cratonic blocks: A –...– Kaapvaal, SF – São Francisco (Brazil), T – Tanzania, Z – Zimbabwe; Proterozoic mobile belts: ir –...onto the Namuno block (The Cabo Delgado Nappe Complex -CDNC, after Viola et al., 2008). These exotic...(Tirschmann et al., 2010). Mafic rocks of the Xixano complex (Boyd et al., 2010) have a significant crustal...(represented by the western granulite belt of Tanzania and CDNC of northern Mozambique; Fig. 4) that |
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| Geological Sciences Mineral Resources Division Nepheline —-Syenite and Phonolite HMSO 15s Od Digitized...Natural Environment Research Council Contents Nepheline-Syenite and Phonolite Introduction Chemistry...Mineralogy and Classification of Nepheline-Bearing Rocks Origin of Nepheline-Bearing Rocks Mining and Treatment...Economic Assessment of Nepheline-Syenite and Phonolite Occurrences Nepheline-Syenite and Phonolite in...Rhodesia Sierra Leone Tanzania Uganda Zambia Canada India Australia New Zealand Nepheline-Syenite and Phonolite |
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| Implication for an orogenic cycle between the Tanzania Craton and Bangweulu Block during the assembly...Implication for an orogenic cycle between the Tanzania Craton and Bangweulu Block during the assembly...Implication for an orogenic cycle between the Tanzania Craton and Bangweulu Block during the assembly...Dar es Salaam, P.O. Box 35052, Dar es Salaam, Tanzania b Kiel University, Institute of Geosciences, 24098...Ubendian Belt was followed by a collision between the Tanzania Craton and the Bangweulu Block and tectonometamorphic |
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| Mineralogy and Petrology of Nepheline Syenites from the Coldwell Alkaline Complex, Ontario, Canada by ROGER...PLATES ABSTRACT Nepheline natrolite syenites of Center 2 of the Coldwell alkaline complex exhibit rare wispy...porphyroclastic to mosaic granuloblastic. The nepheline syenites are pyroxene-poor. Pyroxenes occur most...muscovite and thomsonite is characteristic. The nepheline syenites are considered to be a part of a cycle...during post-intrusive regional block faulting. The nepheline syenites were probably derived by extensive fractional |
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| consists of an Archean basement (Banded Gneiss Complex – Bundelkhand craton) flanked in the west by the...identified subduction–accretion history in this region associated with various cycles of the birth and...Precambrian stratigraphic units of the Aravalli region in NW India with the present study area shown in...the high grade metamorphic orogen of Sandmata Complex with westerly dips, incorporating the Phulad ophiolites...Pisarevsky, 2005) or the remnant of extensions to the Tanzania, Dharwar or the Marwar Cratons that formed part |
 | Singh, Yengkhom Kesorjit, De Waele, Bert, Karmakar, Subrata, Sarkar, Sunayana, Biswal, Tapas Kumar (2010) Tectonic setting of the Balaram-Kui-Surpagla-Kengora granulites of the South Delhi Terrane of the Aravalli Mobile Belt, NW India and its implication on correlation with the East African Orogen in the Gondwana assembly. Precambrian Research, 183 (4) 669-688 doi:10.1016/j.precamres.2010.08.005 | Journal (article/letter/editorial) |
| much younger than those of the Sandmata Granulite Complex of the northern part of the Aravalli Mobile Belt...extensive granulite terranes such as in the Napier Complex, Eastern Ghats Mobile Belt (Dasgupta, 1995; Mukherjee...Alps (Handy et al., 1999), Sandmata Granulite Complex of the Aravalli Mobile Belt (Guha and Bhattacharya...millions of years, such as is the case for the Napier Complex (Harley, 1985), to only a few hundred million years...granulite pockets known as the Sandmata Granulite Complex (Sharma, 1988; Deb et al., 1989; Guha and Bhattacharya |
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| volcanic regions (e.g. Rungwe in Southwestern Tanzania) are poorly known, hence the need to increase........................................... 7.3 Nepheline and Kalsilite ............................ 7.4...Mafic-Ultramafic Magmatism in the Southwest Uganda Region of the African Rift: Implications from Experimental.... . . ... 3 The Crust Under the Canary Islands Region ............. 4 Network of Fractures and Identity...Identity of Vertical Movements in the Canary Islands Region ........................... 4.1 Transoceanic and |
 | Kuribara, Yusuke, Tsunogae, Toshiaki, Santosh, M., Takamura, Yusuke, Costa, Antônio Gilberto, Rosière, Carlos A. (2019) Eoarchean to Neoproterozoic crustal evolution of the Mantiqueira and the Juiz de Fora Complexes, SE Brazil: Petrology, geochemistry, zircon U-Pb geochronology and Lu-Hf isotopes. Precambrian Research, 323. 82-101 doi:10.1016/j.precamres.2019.01.008 | Journal (article/letter/editorial) |
| geochronology; Lu-Hf isotopes; Juiz de Fora Complex; Mantiqueira Complex; Kuunga Orogen 1. Introduction Recent...supercontinent is considered to have been formed by complex subduction and multiple collisional events between...geochronological data on orthogneisses of the Mantiqueira Complex indicate that their protoliths were formed by Neoarchean...al., 1998, 2010), and those of the Juiz de Fora Complex during Siderian (2427 Ma; e.g., Heilbron et al...available geochronological and isotopic data from this region, with a view to evaluate the tectonic evolution |
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| g r Palaeoproterozoic assembly of the Napier Complex, Southern India and Western Australia: Implications...The available geological data from the Napier Complex of the Eastern Antarctica and the Dharwar craton...palaeomagnetic data demonstrate that the Napier Complex was also a part of “SIWA” during the period 2200–1900...the Yilgarn craton. The separation of the Napier Complex from the south Indian block led to the development...poor quality palaeomagnetic data from the Napier Complex of Antarctica, along with the matching continental |
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| Orogeny to explain the evolution of the Prydz Bay region of East Antarctica, discarding the traditional...High-grade metamorphism and deformation in the Prydz Bay region, East Antarctica: terrains, events and regional...Orogen; K, Katangan Orogen; Nor, Norway; NET, NE Tanzania. Malaysia block includes Cambodia, Thailand and...Rosen 1994). Plate reconstructions in the Arctic region based on U-Pb zircon ages suggest that northern...1200 Ma Society Cliffs Formation in the Arctic region (Baffin Island) have a minimum ratio of c. 0.706 |
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| the Australasian region. He works closely with his counterparts from the SE Asia region. He leads industry-CODES-funded...sapphirine in a highly calcic anorthosite-layered complex in Tamil Nadu, India [15]. Overall, a feature of...and isotopic determinations in small and more complex zircons and zirconolite crystals. In the study...phases, whereas Montepuez inclusions have more complex phases and show exsolution features. The tabled...pyrrhotite-pyrite composite among Mogok inclusions, while complex Montpuez inclusions contained chalcopyrite, pentlandite |
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| Granulite Block 2.2.2.1 Salem mafic-ultramafic complex 2.2.2.2 Mettur shear zone 2.2.3 Cauvery suture...The Wanni Complex The Highland Complex The Vijayan Complex The Wanni Complex-Highland Complex Boundary...Boundary Shear Zone (WHBSZ) 3.6 The Highland Complex/Vijayan Complex Boundary Shear Zone References 185 187...Supracrustal belts 2.4.4 Chhotanagpur GraniteeGneiss Complex References Further reading Aravalli-Delhi Orogenic...Central Zone of the Limpopo Belt The Mahalapye Complex 4.4.1 The Mahalapye Granite 4.4.2 The Mokgware |
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| Cenozoic Orogenic Belts in the Eastern Mediterranean Region 127 Palaeozoic/Neoproterozoic orogens PUCHKOV...tectonics Three contributions from the Mediterranean region provide examples of the complexity and heterogeneity...continental drift reconstructions) of the Mediterranean region from late Triassic to Miocene. This time period...distinctive structural elements in the Mediterranean region and reflects the bending of the Apennine and Sicilian...number of these terranes, including the Acatlán Complex of the Mixteca terrane, which is the largest inlier |
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| systematically present the geology of each country, region and continent on Earth. Each book aims to provide...concerning the tectonic and geodynamic evolution of this region during the Precambrian. Major tectonometamorphic...tectonostratigraphic domains and structures of the region are presented, together with implications for the...Craton margin. The structurally lower Swartland Complex resulted from tectonic underplating during southeast-directed...Ma) Achalian orogenies, which resulted from the complex alternation of subduction-related and collisional |
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| investigations of Precambrian geology in the Great Lakes region by department faculty, beginning with R. D. Irving...in the geological development of the Great Lakes region. The symposium was attended by approximately 150...resources, and Proterozoic geology of the Great Lakes region. Papers from the last category have been published...Grenville and Dalslandian belts in the North Atlantic region formed with prominent Andean-type and Himalayan-type...Grenville-Dalslandian mo¬ bile belt formed in the North Atlantic region. Isotopic ages elsewhere in the world peak in this |
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| the earth was both lithologically and chemically complex as far back as the available geologic record indicates...Mineral Exploration in Northern Tanzania, P.O. Box 641, Arusha, Tanzania I. G. GASS Department of Earth...PROTEROZOIC CHRONOLOGY AND EVOLUTION O F THE MIDCONTINENT REGION; NORTH AMERICA W . R . Van Schmus and M . E . Bickford.... . . . . . . . . . . . . . . . . . . Penokean region . . . . . . . . . . . . . . . . . . . . . . . ...2 7 3 - 1610-1680 Ma old belt, 274 Midcontinent region . . . . . . . . . . . . . . . . . . . . . . . |
