1-20 OF 23 RESULTS FOR

Tinderet

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Journal Article
Published: 01 April 2013
Mineralogical Magazine (2013) 77 (3): 213-226.
...A. N. Zaitsev; T. Wenzel; T. Vennemann; G. Markl Abstract The Tinderet volcano (19.9 to 5.5 Ma), located within the Kavirondo rift in Kenya, contains blocks of carbonatite lavas with calcite, minor apatite, fluorite, spinel-group minerals, accessory perovskite and ‘plumbopyrochlore’; nyerereite...
FIGURES | View All (7)
Journal Article
Published: 01 May 1984
Journal of the Geological Society (1984) 141 (3): 563-580.
...T. Deans; B. Roberts Abstract Miocene 'limestones' around Tinderet, noted for their mammalian fossils, but recognized as in part carbonatitic, are now shown to be carbonatite tuffs and volcaniclastics. They contain ejectamenta of fenites, sövites and blocks and bombs of carbonatite lava which have...
Journal Article
Published: 01 April 1972
Journal of the Geological Society (1972) 128 (2): 173-205.
... of uncertain origin at Homa, evidence for extrusive activity in this region is confined to the small phonolitic volcano of Nyamaji, to the north-east of Ruri. At the eastern end of the Kavirondo trough and close to the main rift, occur the volcanoes of Tinderet and Londiani; minor occurrences of carbonatite...
Image
Backscattered-electron images of major and minor minerals in the <b>Tinderet</b> c...
Published: 01 April 2013
F ig . 3. Backscattered-electron images of major and minor minerals in the Tinderet carbonatites. ( a ) A tabular type-I calcite phenocryst in a type-II calcite groundmass, with a void filled by type-IV calcite; ( b ) relationships between type-II, type-III and type-IV calcite; ( c ) fluorite
Image
Backscattered-electron images of accessory minerals in <b>Tinderet</b> carbonatite...
Published: 01 April 2013
F ig . 4. Backscattered-electron images of accessory minerals in Tinderet carbonatites. ( a ) Nyerereite inclusions (indicated by arrows) in perovskite; the other inclusions are calcite. ( b ) Zoned ‘plumbopyrochlore’ crystal; Ap is apatite and black is calcite.
Image
Calcite composition, plotted as Na 2 O  vs . SrO, from <b>Tinderet</b> (this study...
Published: 01 April 2013
F ig . 6. Calcite composition, plotted as Na 2 O vs . SrO, from Tinderet (this study), Kerimasi (this study; Zaitsev, 2010 ) and Oldoinyo Lengai ( Keller and Zaitsev, 2006 ; Zaitsev and Keller, 2006 ; Zaitsev et al. , 2008 ).
Journal Article
Published: 01 December 1979
Journal of the Geological Society (1979) 136 (6): 693-704.
... with alkali basalt-trachyte sequences predominating. During this period the Kavirondo Rift was inactive. The stratigraphic sequence in the area has been dated by 19 new K-Ar age determinations. These enable the absolute and relative ages of the Tinderet, Timboroa, Kapkut, Londiani and Kilombe volcanoes...
Image
Geological map of the central and northern parts of the Gregory rift and it...
Published: 01 April 2013
F ig . 1. Geological map of the central and northern parts of the Gregory rift and its vicinity, showing the locations of the Tinderet, Oldoinyo Lengai and Kerimasi volcanoes [after Williams ( 1969 )]. For a geological map of Tinderet see Deans and Roberts ( 1984 ).
Image
Stable carbon and oxygen isotope compositions for the carbonatites from Tin...
Published: 01 April 2013
F ig . 5. Stable carbon and oxygen isotope compositions for the carbonatites from Tinderet (this work), Kerimasi (this work; Vinogradov et al. , 1970 , 1971 ), Oldoinyo Lengai ( Keller and Zaitsev, 2006 ) and Buru ( Onuonga et al. , 1997 ). Lines join fractions from the same samples.
Image
Composition of the spinel-group minerals, plotted as MnO  vs . MgO, from Ti...
Published: 01 April 2013
F ig . 7. Composition of the spinel-group minerals, plotted as MnO vs . MgO, from Tinderet (this study), Kerimasi (this study; Reguir et al. , 2008 ) and Oldoinyo Lengai (this study; Dawson, 1993 ; Mitchell and Belton 2004 , 2008 ; Keller and Zaitsev, 2006 ; Zaitsev et al. , 2008 ). Data
Journal Article
Published: 01 April 1990
Journal of the Geological Society (1990) 147 (2): 213-216.
... 15 765 68 Deans T. Roberts B. Carbonatite tuffs and lava clasts of the Tinderet foothills, Western Kenya: a study of calcified natrocarbonatites Journal of the Geological Society, London 1984 141 563 580 Eggler D. H. Does CO 2 cause partial melting in the low...
Journal Article
Published: 01 February 1988
Journal of the Geological Society (1988) 145 (1): 95-106.
... Deans T. Roberts B. Carbonatite tuffs and lava clasts of the Tinderet foothills, western Kenya: a study in calcified natrocarbonatites Journal of the Geological Society, London 1984 141 563 80 Deans T. Seager A. F. Stratiform magnetite crystals of abnormal morphology from...
Journal Article
Published: 01 December 1991
Journal of the Geological Society (1991) 148 (6): 1067-1078.
... alkalic carbonatite lava from Oldoinyou Lengai, Tanzania: Inferences for calcite carbonatite lavas Geology 1987 15 687 782 Deans C. Roberts B. Carbonatite tuffs and lava clasts of the Tinderet foothills, western Kenya: a study of calcified natrocarbonatite Journal of the Geological...
Journal Article
Journal: Geology
Published: 01 August 2015
Geology (2015) 43 (8): 687-690.
... Lengai, Tanganyika : Nature , v. 195 , p. 1075 – 1076 , doi:10.1038/1951075a0. Deans T. Roberts B. , 1984 , Carbonatite tuffs and lava clasts of the Tinderet foothills, western Kenya: A study of calcified natrocarbonatites : Geological Society of London Journal , v. 141 , p. 563...
FIGURES
Journal Article
Journal: Paleobiology
Published: 01 January 2004
Paleobiology (2004) 30 (4): 614-651.
... there is a lack of precision in the stratigraphic data. Individual cases where this occurred are discussed below. Although the taxonomic assignment of the Kisingiri and Tinderet material to the genus Proconsul is rather secure, the potential FAE and LAE for this taxon is somewhat problematic. This is due...
FIGURES | View All (7)
Journal Article
Published: 01 April 1993
Journal of the Geological Society (1993) 150 (2): 293-310.
... clasts of the Tinderet foothills, western Kenya; a study of calcified natrocarbonatites Journal of the Geological Society, London 1984 141 563 580 de Wit, H. A. 1978. Soils and grassland types of the Serengeti Plain (Tanzania). Their distribution and interrelations. PhD dissertation...
Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 831-841.
... chemistry of carbonates, apatites, and magnetites in some African carbonatites . Mineral. Mag . 60 , 415 – 425 . Deans , T. & Roberts , B. ( 1984 ): Carbonatite tuffs and lava clasts of the Tinderet foothills, western Kenya; a study of calcified natrocarbonatites . J. Geol. Soc...
FIGURES | View All (10)
Journal Article
Published: 01 April 2012
Mineralogical Magazine (2012) 76 (2): 271-284.
...) (b) Potential localities, indicated by red dots in Fig. 7 . EUROPE Spain (Jumilla) Germany (Schwabia and Hegau) Czech Republic (Ohre Rift) AFRICA Morocco (Tamazert) Algeria (Atakor) Cameroun Kenya (Tinderet) Tanzania (Hanang and Rungwe) Uganda (Katwe) Democratic...
FIGURES | View All (7)
Journal Article
Published: 01 August 2006
The Canadian Mineralogist (2006) 44 (4): 857-876.
... in the partly altered, pirssonite-bearing natrocarbonatite ( Dawson et al. 1987 ). Such calcite also has significant contents of Sr and Ba. Calcite with morphological and chemical similarities to the Oldoinyo Lengai calcite is known from Tinderet pyroclastic carbonatites (lapilli tuffs and agglomeratic...
FIGURES | View All (13)
Journal Article
Published: 01 December 2005
The Canadian Mineralogist (2005) 43 (6): 2049-2068.
... are widespread. Pyroclastic rocks occurring at Homa Mountain, Laetolil, Kerimasi, Tinderet, and Kaluwe have been interpreted to represent altered natrocarbonatite ( Hay 1983 , Hay & O’Neil 1983 , Deans & Roberts 1984 , Clarke & Roberts 1986 , Turner et al. 1988 ). In these rocks, no relics...
FIGURES | View All (4)