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1-20 OF 152 RESULTS FOR
picroilmenite
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Journal Article
Application of thermomagnetic analysis to picroilmenite investigation
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 November 2009
Russ. Geol. Geophys. (2009) 50 (11): 966–972.
...Sh.Z. Ibragimov; S.G. Mishenin Abstract Picroilmenite samples from five kimberlite pipes of the Yakutian kimberlite province have been studied. Point microprobe analyses of two mutually perpendicular profiles of each sample were carried out to study the compositional inhomogeneity of picroilmenite...
Journal Article
Hydroxylian pseudorutile derived from picroilmenite in the Murray Basin, southeastern Australia
Journal: Mineralogical Magazine
Published: 01 August 2003
Mineralogical Magazine (2003) 67 (4): 733–747.
... Fe contents. A common occurrence in the ilmenite concentrates was the presence of composite grains comprising primary ilmenite cores and HPR rims, as illustrated in Fig. 3 . Analysis of the primary ilmenite cores showed them to be ferrian picroilmenites containing relatively high hematite (up...
Journal Article
GENESIS OF THE RIMS ON PICROILMENITES OF THE TAIGIKUN-NEMBA KIMBERLITE FIELD ( Evenkia )
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 February 2005
Russ. Geol. Geophys. (2005) 46 (2): 198–205.
...A.M. Khmel’kov Using a modern microprobe, we have thoroughly studied the structure and phase composition of polymictic rims on picroilmenites sampled from modern alluvial deposits and from eluvium of the Khorkich pipe in the Taigikun-Nemba kimberlite field. Data obtained helped to refine...
Journal Article
Dependence of the composition of the Zarnitsa pipe picroilmenites (Yakutia) on their formation conditions (from data of thermomagnetic studies)
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 March 2014
Russ. Geol. Geophys. (2014) 55 (3): 397–404.
...Sh.Z. Ibragimov; S.G. Mishenin; Yu.N. Osin Abstract A thermomagnetic analysis has been performed for 737 picroilmenite samples from the cores of eight boreholes in the N–S-striking drilling profile of the Zarnitsa kimberlite pipe in the Daldyn kimberlite field, Yakutia. Based on the shapes...
Image
Thermomagnetic curves for picroilmenite samples taken from borehole 3, dept...
in Dependence of the composition of the Zarnitsa pipe picroilmenites (Yakutia) on their formation conditions (from data of thermomagnetic studies)
> Russian Geology and Geophysics
Published: 01 March 2014
Fig. 2. Thermomagnetic curves for picroilmenite samples taken from borehole 3, depth ranges 50–70 m (samples 1 and 3 ) and 70–90 m (samples 2 and 4 ). For explanations, see the text.
Image
a , Backscattered electron photo of picroilmenite grain 1_2, with probe mic...
in Dependence of the composition of the Zarnitsa pipe picroilmenites (Yakutia) on their formation conditions (from data of thermomagnetic studies)
> Russian Geology and Geophysics
Published: 01 March 2014
Fig. 3. a , Backscattered electron photo of picroilmenite grain 1_2, with probe microanalysis points along the profiles and contents of the hematite end-member, %. b , Distribution of the hematite end-member content: K1, distribution of the main component; K2, distribution of supplementary
Image
Fluorapatite–picroilmenite intergrowth in magnetite from the Loolekop phosc...
in Fairchildite K 2 Ca(CO 3 ) 2 in phoscorites from Phalaborwa, South Africa: the first occurrence in alkaline carbonatite complexes
> Russian Geology and Geophysics
Published: 01 February 2011
Fig. 4. Fluorapatite–picroilmenite intergrowth in magnetite from the Loolekop phoscorites. Ap, Fluorapatite; Ilm, picroilmenite. Here and in what follows, the images were obtained in the BSE mode.
Image
MgO–TiO 2 diagram ( Green and Sobolev, 1975 ) for picroilmenite macrocryst...
in Kimberlites of the Manchary pipe: a new kimberlite field in Central Yakutia
> Russian Geology and Geophysics
Published: 01 January 2010
Fig. 3. MgO–TiO 2 diagram ( Green and Sobolev, 1975 ) for picroilmenite macrocrystals from Manchary pipe kimberlites.
Image
Diagram TiO 2 –FeO tot in Mn-ilmenite and picroilmenite from Juina kimberl...
Published: 01 December 2009
Fig. 4. Diagram TiO 2 –FeO tot in Mn-ilmenite and picroilmenite from Juina kimberlites. Diameter of circles is proportional to the MnO content. 1 , Mn-ilmenite; 2 , picroilmenite; 3 , inclusions.
Image
TMA curve of the picroilmenite sample Ud1-4 from the Udachnaya pipe with ka...
in Application of thermomagnetic analysis to picroilmenite investigation
> Russian Geology and Geophysics
Published: 01 November 2009
Fig. 3. TMA curve of the picroilmenite sample Ud1-4 from the Udachnaya pipe with kaoline filler ( 1 ), TMA curve of kaoline ( 2 ), and difference curve of pure picroilmenite ( 3 ). For explanations see the text.
Image
Plots of the contents of main elements (simple oxides) in picroilmenite gra...
in Application of thermomagnetic analysis to picroilmenite investigation
> Russian Geology and Geophysics
Published: 01 November 2009
Fig. 4. Plots of the contents of main elements (simple oxides) in picroilmenite grains. a , Sample Aih05-1; b , sample Ud1-3. 1 , TiO 2 ; 2 , MgO; 3 , FeO; 4 , total content of all elements (Ti, Mg, Fe, Al, Cr, Mn) determined by microprobe analysis. N , number of microprobing points.
Image
Photomicrographs of picroilmenite grains in the phase contrast regime. a ,...
in Application of thermomagnetic analysis to picroilmenite investigation
> Russian Geology and Geophysics
Published: 01 November 2009
Fig. 5. Photomicrographs of picroilmenite grains in the phase contrast regime. a , Aikhal pipe, sample Aih05-1; b , Udachnaya pipe, sample Ud1-3. Roman figures mark profiles, and Arabian figures and crosses, the microprobing points (every 50 µm).
Image
Hexagonal tablets of picroilmenite. a — tablets obtained during the exper...
in Mechanical abrasion of kimberlite indicator minerals: experimental investigations
> Russian Geology and Geophysics
Published: 07 February 2008
Fig. 3. Hexagonal tablets of picroilmenite. a — tablets obtained during the experiment, ×8; b — tablets from Mesozoic littoral haloes of the northeastern Siberian platform, ×16 ( Afanas’ev et al., 2001 ).
Image
Ratio of the mechanical abrasion degree of pyrope and picroilmenite in anci...
in Mechanical abrasion of kimberlite indicator minerals: experimental investigations
> Russian Geology and Geophysics
Published: 07 February 2008
Fig. 4. Ratio of the mechanical abrasion degree of pyrope and picroilmenite in ancient haloes. Roundness classes: 1 — strongly angular (abrasion is not visible); 2 — angular (obscure abrasion); 3 — subangular (mean abrasion); 4 — subrounded (distinct abrasion); 5 — rounded (maximum abrasion).
Image
Structure of rims on picroilmenite grains from the Taigikun-Nemba kimberlit...
in GENESIS OF THE RIMS ON PICROILMENITES OF THE TAIGIKUN-NEMBA KIMBERLITE FIELD ( Evenkia )
> Russian Geology and Geophysics
Published: 01 February 2005
Fig. 2. Structure of rims on picroilmenite grains from the Taigikun-Nemba kimberlite field. a — Khorkich pipe zone, sample 3118 (Ps — perovskite, TiMt — titanomagnetite, Lc — leucoxene); b , c — Nemba-Daldyn site, sample 3100. For explanations, see the text.
Image
Diagrams MgO–MnO (a) and MnO vs. V 2 O 3 (b) in Mn-ilmenite and picroilmen...
Published: 01 December 2009
Fig. 3. Diagrams MgO–MnO (a) and MnO vs. V 2 O 3 (b) in Mn-ilmenite and picroilmenite from Juina kimberlites. 1 , Mn-ilmenite; 2 , picroilmenite; 3 , inclusions.
Journal Article
Mechanical abrasion of kimberlite indicator minerals: experimental investigations
V.P. Afanas’ev, E.I. Nikolenko, N.S. Tychkov, A.T. Titov, A.V. Tolstov, V.P. Kornilova, N.V. Sobolev
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 07 February 2008
Russ. Geol. Geophys. (2008) 49 (2): 91–97.
...Fig. 3. Hexagonal tablets of picroilmenite. a — tablets obtained during the experiment, ×8; b — tablets from Mesozoic littoral haloes of the northeastern Siberian platform, ×16 ( Afanas’ev et al., 2001 ). ...
Journal Article
Fairchildite K 2 Ca(CO 3 ) 2 in phoscorites from Phalaborwa, South Africa: the first occurrence in alkaline carbonatite complexes
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 February 2011
Russ. Geol. Geophys. (2011) 52 (2): 208–219.
...Fig. 4. Fluorapatite–picroilmenite intergrowth in magnetite from the Loolekop phoscorites. Ap, Fluorapatite; Ilm, picroilmenite. Here and in what follows, the images were obtained in the BSE mode. ...
Journal Article
Manganoan ilmenite as kimberlite/diamond indicator mineral
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 December 2009
Russ. Geol. Geophys. (2009) 50 (12): 1212–1220.
...Fig. 4. Diagram TiO 2 –FeO tot in Mn-ilmenite and picroilmenite from Juina kimberlites. Diameter of circles is proportional to the MnO content. 1 , Mn-ilmenite; 2 , picroilmenite; 3 , inclusions. ...
Image
Modeling of TMA curves with the specified contents of hematite component in...
in Application of thermomagnetic analysis to picroilmenite investigation
> Russian Geology and Geophysics
Published: 01 November 2009
Fig. 2. Modeling of TMA curves with the specified contents of hematite component in picroilmenite. a , Density of the normal distribution (ρ) of hematite component at the specified average and variance values; b , corresponding model thermomagnetic curves—dependences of the relative
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