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1-20 OF 146 RESULTS FOR
tobelite
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Journal Article
Structural anomalies in tobelite-2 M 2 explained by high resolution and analytical electron microscopy
Journal: Mineralogical Magazine
Published: 01 February 2016
Mineralogical Magazine (2016) 80 (1): 143–156.
...G. C. Capitani; E. Schingaro; M. Lacalamita; E. Mesto; F. Scordari Abstract A transmission electron microscopy (TEM) investigation was undertaken in order to elucidate the nature of the structural disorder in a tobelite specimen from the sedimentary rocks of the Armorican sandstones (western France...
Journal Article
NITROGEN-BEARING CORDIERITE AND TOBELITE IN META-RHYOLITES FROM THE CEUTA ZONE (RIF BELT, SPAIN): EVIDENCE FOR MOBILITY OF NITROGEN IN THE CONTINENTAL CRUST
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 2013
The Canadian Mineralogist (2013) 51 (6): 945–946.
Journal Article
NITROGEN-BEARING CORDIERITE AND TOBELITE IN META-RHYOLITES FROM THE CEUTA ZONE (RIF BELT, SPAIN): EVIDENCE FOR MOBILITY OF NITROGEN IN THE CONTINENTAL CRUST
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2013
The Canadian Mineralogist (2013) 51 (5): 689–704.
... with decreasing NH 4 contents (tobelite, NH 4 -bearing white mica, and K-micas), probably through three successive processes: deuteric alteration, prograde reactions, and retrogressive reactions. The presence of N in cordierite is interpreted to be due to the transfer of the NH 4 , initially contained in biotite...
Journal Article
Far-infrared spectra of synthetic dioctahedral muscovite and muscovite–tobelite series micas: Characterization and assignment of the interlayer I–O inner and I–O outer stretching bands
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1848–1859.
...,OD) 2 , where x = 0.0–3.0, y = 0.0–3.0, and the muscovite–tobelite series, (d) [K 1–A (NH 4 ,ND 4 ) A ]Al 3 Si 3 O 10 (OH,OD) 2 , where A = 0.0–1.0, indicate that there is a complete solid-solution in each series. In the 200–50 cm −1 far-infrared region, four kinds of bands are observed: two bands...
Includes: Supplemental Content
Journal Article
Tobelite and NH 4 + -rich muscovite single crystals from Ordovician Armorican sandstones (Brittany, France): Structure and crystal chemistry
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 August 2012
American Mineralogist (2012) 97 (8-9): 1460–1468.
...Ernesto Mesto; Fernando Scordari; Maria Lacalamita; Emanuela Schingaro Abstract The crystal structures of tobelite and NH 4 + -rich muscovite from the sedimentary rocks of the Armorican sandstones (Brittany, France) have been solved for the first time by single-crystal X-ray diffraction...
Journal Article
FACTORS CONTROLLING THE EVOLUTION OF MINERAL ASSEMBLAGES AND ILLITE CRYSTALLINITY IN PALEOZOIC TO TRIASSIC SEQUENCES FROM THE TRANSITION BETWEEN MALÁ GUIDE AND ALPUJÁ RRIDE COMPLEXES (BETIC CORDILLERA, SPAIN): THE SIGNIFICANCE OF TOBELITE
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 August 2010
Clays and Clay Minerals (2010) 58 (4): 558–572.
..., in addition, tobelite, which comprises some of the detrital grains and strongly masks the illite crystallinity values. Tobelite has been identified only in the upper thrust slices, suggesting that changes in the detrital input is primarily responsible for the disappearance of tobelite at the transition from...
Journal Article
Crystal-chemistry of synthetic K-feldspar–buddingtonite and muscovite–tobelite solid solutions
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2007
American Mineralogist (2007) 92 (1): 151–165.
...-feldspar–buddingtonite, muscovite–tobelite series, and quartz. The run products were characterized by electron microprobe, powder X-ray diffraction with Rietveld analysis, and infrared spectroscopy. It can be shown that complete solid solution exists for both series for temperatures at least above 400 °C...
Includes: Supplemental Content
Journal Article
Solution calorimetric determination of the enthalpies of formation of NH 4 -bearing minerals buddingtonite and tobelite
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2004
American Mineralogist (2004) 89 (1): 85–93.
...Guy L. Hovis; Daniel Harlov; Matthias Gottschalk Abstract Enthalpies of solution of the NH 4 + -bearing minerals buddingtonite (NH 4 AlSi 3 O 8 feldspar) and tobelite [NH 4 Al 2 (AlSi 3 O 10 ) (OH) 2 mica] have been measured in 20.1 wt% hydrofluoric acid (HF) at 50°C. Utilizing additional HF...
Journal Article
Orientational order-disorder of N(D,H) 4 + in tobelite
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2002
American Mineralogist (2002) 87 (11-12): 1686–1691.
...Mainak Mookherjee; Simon A.T. Redfern; Ming Zhang; Daniel E. Harlov Abstract Orientational order-disorder behavior of NH 4 + is a well-established phenomenon in certain ammonium halides and ammonium salts. Anticipating similar behavior of ammonium in the interlayer site of tobelite, synthetic ND 4...
Journal Article
TOBELITIZATION OF SMECTITE DURING OIL GENERATION IN OIL-SOURCE SHALES. APPLICATION TO NORTH SEA ILLITE-TOBELITE-SMECTITE-VERMICULITE
Victor A. Drits, Holger Lindgreen, Boris A. Sakharov, Hans Jørgen Jakobsen, Alfred L. Salyn, Lidia G. Dainyak
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 February 2002
Clays and Clay Minerals (2002) 50 (1): 82–98.
... simultaneously with the diagenetic transformation of I-S. We demonstrate a link between the two reactions: NH 3 released from kerogen during maximum oil generation is fixed as NH 4 + in the NH 4 -bearing mica or tobelite layers formed from smectite or vermiculite layers in I-S, in a diagenetic interval which we...
Journal Article
Characterization of hydrothermal tobelitic veins from black shale, Oquirrh Mountains, Utah
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 August 1992
Clays and Clay Minerals (1992) 40 (4): 405–420.
Image
Tobelite (Tob) crystal in the core of the quartz (Qz) vein from the SADC76 ...
in A Sb ± Au mineralizing peak at 360 Ma in the Variscan belt
> Bulletin de la Société Géologique de France
Published: 05 March 2019
Fig. 4 Tobelite (Tob) crystal in the core of the quartz (Qz) vein from the SADC76 sample (A. in plane-polarized light and B. between crossed polars). Tobelite crystals with Chlorite (Chl) along the vein border from the SADC76 sample (C. in plane-polarized light and D. between crossed polars). E
Image
A. Typical Pb-Sb-Au vein of the stage 3 from SADC. Wall rocks (to the left)...
in A Sb ± Au mineralizing peak at 360 Ma in the Variscan belt
> Bulletin de la Société Géologique de France
Published: 05 March 2019
Fig. 3 A. Typical Pb-Sb-Au vein of the stage 3 from SADC. Wall rocks (to the left) are rich in sphalerite (Sp) and galena (Gn) whereas vein centre (to the right) shows sulfosalts (here boulangerite, Blg) and tobelite (Tob) enclosed within a quartz gangue. B. Polished thin section microphotograph
Image
High-frequency zone of the Raman spectra obtained from the porphyroblasts s...
in NITROGEN-BEARING CORDIERITE AND TOBELITE IN META-RHYOLITES FROM THE CEUTA ZONE (RIF BELT, SPAIN): EVIDENCE FOR MOBILITY OF NITROGEN IN THE CONTINENTAL CRUST
> The Canadian Mineralogist
Published: 01 October 2013
Fig. 7 High-frequency zone of the Raman spectra obtained from the porphyroblasts shown in Figures 4A and D , from mica from the matrix and from synthetic tobelite. See text for explanation. Tob: Tobelite.
Image
A. Single grain 40 Ar/ 39 Ar dating of tobelite (from SADC76 sample) from ...
in A Sb ± Au mineralizing peak at 360 Ma in the Variscan belt
> Bulletin de la Société Géologique de France
Published: 05 March 2019
Fig. 5 A. Single grain 40 Ar/ 39 Ar dating of tobelite (from SADC76 sample) from vein of the hydrothermal stage 3 (Pb-Sb-Au). The age error bars for each temperature steps and plateau age are given at the 1 σ level. B. Inverse isochron analysis of the SADC76 α tobelite experiment.
Image
XRD patterns (oriented mounts) of three selected samples, showing the 001 (...
in NITROGEN-BEARING CORDIERITE AND TOBELITE IN META-RHYOLITES FROM THE CEUTA ZONE (RIF BELT, SPAIN): EVIDENCE FOR MOBILITY OF NITROGEN IN THE CONTINENTAL CRUST
> The Canadian Mineralogist
Published: 01 October 2013
Fig. 6 XRD patterns (oriented mounts) of three selected samples, showing the 001 (A) and 005 (B) reflections of micas. Modeling corresponding to 6% Tob + 94% Ms is included in each case at the bottom. (C) FTIR spectra of the same samples and of synthetic tobelite. See text for explanation. Tob
Journal Article
FORMATION AND TRANSFORMATION OF MIXED-LAYER MINERALS BY TERTIARY INTRUSIVES IN CRETACEOUS MUDSTONES, WEST GREENLAND
Victor A. Drits, Holger Lindgreen, Boris A. Sakharov, Hans Jorgen Jakobsen, Anthony E. Fallick, Alfred L. Salyn, Lidia G. Dainyak, Bella B. Zviagina, Dan N. Barfod
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 June 2007
Clays and Clay Minerals (2007) 55 (3): 260–283.
... minerals include for each sample two mixed-layer phases consisting of pyrophyllite, margarite, paragonite, tobelite, illite, smectite and vermiculite layers. The main, 80 m thick intrusion resulted in the formation of pyrophyllite, margarite, paragonite and tobelite layers. However, the tobelite layers...
Journal Article
Illite-smectite structural changes during metamorphism in black Cambrian Alum shales from the Baltic area
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 September 2000
American Mineralogist (2000) 85 (9): 1223–1238.
..., one of which contains 0.05 and the other 0.25 smectite (S) interlayers. The first phase does not change during metamorphism. In the second phase, 0.20 S are converted to tobelite (T) layers through fixation of \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage...
Image
Relationship between proportion of tobelite layers, w T , formation tempe...
in TOBELITIZATION OF SMECTITE DURING OIL GENERATION IN OIL-SOURCE SHALES. APPLICATION TO NORTH SEA ILLITE-TOBELITE-SMECTITE-VERMICULITE
> Clays and Clay Minerals
Published: 01 February 2002
Figure 12. Relationship between proportion of tobelite layers, w T , formation temperature of the samples, T , and vitrinite reflectance values, R o , for North Sea and Norwegian–Danish basin I-T-S-V minerals. Labels for each point correspond to the w T value for the I-T-S-V
Image
Tobelite/muscovite area including mixed-layers in sample Ge-7. Two- and thr...
in Characterization of coexisting NH 4 - and K-micas in very low-grade metapelites
> American Mineralogist
Published: 01 February 2002
F igure 8. Tobelite/muscovite area including mixed-layers in sample Ge-7. Two- and three-layer periodicities are pointed out in the image. SAED pattern (inset) shows an intermediate (00 l ) spot between the first and the second one. Similar intermediate spots between higher-order reflections
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