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bastites

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Journal Article

Mesh textures and bastites in the Elba retrograde serpentinites

Cecilia Viti, Marcello Mellini
Published: 01 December 1998
European Journal of Mineralogy (1998) 10 (6): 1341–1359.
...Cecilia Viti; Marcello Mellini Abstract Retrograde serpentinized peridotites, belonging to the Internal Ligurid terrains, occur in eastern Elba island, Italy. The mesh texture (with pyroxene bastites) is the typical textural arrangement. The mesh rims are apparently fibrous, with negative optical...
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Journal Article

Bastite pseudomorphs after orthopyroxene, clinopyroxene and tremolite

M. A. Dungan
Published: 01 November 1979
The Canadian Mineralogist (1979) 17 (4): 729–740.
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Micro-Raman spectra of <span class="search-highlight">bastite</span> antigorite ( A ), <span class="search-highlight">bastite</span> lizardite ( B ), m...

Micro-Raman spectra of bastite antigorite ( A ), bastite lizardite ( B ), m...

Published: 01 May 2006
Fig. 4. Micro-Raman spectra of bastite antigorite ( A ), bastite lizardite ( B ), mesh lizardite ( C ), and matrix antigorite ( D ).
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(a) Contact relationship between gabbroic rocks and ultramafic rocks. (b) G...

(a) Contact relationship between gabbroic rocks and ultramafic rocks. (b) G...

Published: 02 August 2021
Fig. 2. (a) Contact relationship between gabbroic rocks and ultramafic rocks. (b) Gabbroic rock. (c) Serpentinized harzburgite. (d) Bastites with orthopyroxene pseudomorphs in a serpentinized peridotite. Abbreviations: Pl – plagioclase; Hb – hornblende; Opx – orthopyroxene; Serp – serpentine; Bas
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Equal-area stereographic projections. (A) Kamb (1959) contour of fold hin...

Equal-area stereographic projections. (A) Kamb (1959) contour of fold hin...

Published: 01 July 2012
Figure 4. Equal-area stereographic projections. (A) Kamb (1959) contour of fold hinges of folded foliations in serpentinite. (B) Kamb contour of poles to axial planes. (C) Bastite foliations relict from peridotite. (D) Bastite lineations relict from peridotite in Punta Guanajibo.
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Photos showing mesoscale serpentinite structures. (A) L-tectonite defined b...

Photos showing mesoscale serpentinite structures. (A) L-tectonite defined b...

Published: 01 July 2012
Figure 3. Photos showing mesoscale serpentinite structures. (A) L-tectonite defined by elongated bastites. (B) Bastite layering. (C) Core-and-rim pattern. (D) Serpentine foliation. (E) Breccia and fault plane. (F) Folded serpentine foliation. (G) Matrix-supported conglomerate of serpentinite
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(a) Thin section of sample A1*. (b) PPL (Plane Polarized Light) image of a ...

(a) Thin section of sample A1*. (b) PPL (Plane Polarized Light) image of a ...

Published: 12 August 2022
Fig. 4 (a) Thin section of sample A1*. (b) PPL (Plane Polarized Light) image of a serpentine vein with magnetite grains. (c) Magnified view of a bastite. (d) SEM image of the mesh texture. (e) Magnified image of the mesh texture and (f) associated Fe kα map. (g) Raman spectra of chrysotile
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Photomicrographs of meta-ultramafic rocks. Sample locations are shown in F...

Photomicrographs of meta-ultramafic rocks. Sample locations are shown in F...

Published: 09 August 2017
Figure 8. Photomicrographs of meta-ultramafic rocks. Sample locations are shown in Figures 3 and 6 . (A) Ultramafic rock from the Ecemiş area (ND14-07B) showing incipient mesh-textured serpentinization of olivine (Ol) and bastite textured serpentinization of orthopyroxene (Opx); (B) bastite
Journal Article

Fe-rich antigorite: a rock-forming mineral from low-temperature/high-pressure meta-ophicarbonates

Simonpietro Di Pierro, Chiara Groppo, Roberto Compagnoni, Giancarlo Capitani, Marcello Mellini
Published: 01 July 2019
European Journal of Mineralogy (2019) 31 (4): 775–784.
DOI: https://doi.org/10.1127/ejm/2019/0031-2867
... and bastite microstructures, and it is locally associated with relics of lizardite and/or chrysotile. The modulated lattice parameters of disordered Fe-rich antigorites have been determined by electron diffraction in the transmission electron microscope. The values are highly variable, even within each...
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Includes: Supplemental Content
Journal Article

Chlorine in the Elba, Monti Livornesi and Murlo serpentines : evidence for sea-water interaction

Barbara ANSELMI, Marcello MELLINI, Cecilia VITI
Published: 01 January 2000
European Journal of Mineralogy (2000) 12 (1): 137–146.
DOI: https://doi.org/10.1127/0935-1221/2000/0012-0137
... textures and bastites characterize the Elba, Monti Livornesi and Murlo (Central Italy) retrograde serpentinites. These rocks, formed by hydration of harzburgitic peridotites, were sampled and analyzed to find further evidence for the origin of serpentinization fluids. Based on chemical and mineralogical...
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Polarized light images (crossed nicols) of Mg amphibole-bearing samples. ( ...

Polarized light images (crossed nicols) of Mg amphibole-bearing samples. ( ...

Published: 01 January 2010
F igure 2. Polarized light images (crossed nicols) of Mg amphibole-bearing samples. ( a ) Magnesian amphibole (pale yellow) replacing serpentine in bastitic lamellae; cleavage planes within bastites are inherited from peridotitic pyroxene. ( b ) Acicular Mg amphibole ([001] Mg-Am as elongation
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EMP COMPOSITIONS OF OLIVINE-MESH SERPENTINE AND ORTHOPYROXENE-<span class="search-highlight">BASTITE</span> SERPE...

EMP COMPOSITIONS OF OLIVINE-MESH SERPENTINE AND ORTHOPYROXENE-BASTITE SERPE...

Published: 30 September 2019
TABLE 6. EMP COMPOSITIONS OF OLIVINE-MESH SERPENTINE AND ORTHOPYROXENE-BASTITE SERPENTINE PAIRS USED FOR MASS-BALANCE CALCULATIONS
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BSE images of: ( a ) partially-hydrated <span class="search-highlight">bastite</span> (up to millimetric), with p...

BSE images of: ( a ) partially-hydrated bastite (up to millimetric), with p...

Published: 01 August 2005
F ig . 1. BSE images of: ( a ) partially-hydrated bastite (up to millimetric), with preserved opx core, surrounded by serpentine (serp). Arrows indicate inclusions and exsolved cpx. ( b ) Euhedral, elongated and bleb-like inclusions of cpx within opx-M, often surrounded by a thin rim
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Photomicrographs under cross-polarized light. a , <span class="search-highlight">Bastite</span> texture after py...

Photomicrographs under cross-polarized light. a , Bastite texture after py...

Published: 01 January 2019
Figure 4. Photomicrographs under cross-polarized light. a , Bastite texture after pyroxene. b , Mesh texture after olivine. c , Fresh relics of olivine. d , Fresh relicts of pyroxene. e , Chrysotile-filled vein crosscutting antigorite matrix. f , Brown, microcrystalline, quartz-filled vein
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SEM-EDS average compositions (wt.%) of serpentine pseudomorphs (rim, core, ...

SEM-EDS average compositions (wt.%) of serpentine pseudomorphs (rim, core, ...

Published: 01 September 2004
Table 2. SEM-EDS average compositions (wt.%) of serpentine pseudomorphs (rim, core, bastite), relic olivine, ortho- and clinopyroxenes in partially serpentinized harzburgites.
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Electron microprobe analysis of serpentine after olivine and serpentine-chl...

Electron microprobe analysis of serpentine after olivine and serpentine-chl...

Published: 01 April 2015
Figure 9 Electron microprobe analysis of serpentine after olivine and serpentine-chlorite intergrowths after orthopyroxne in different rock textures and domains. The terms “bastite” and “mesh” refer to pseudomorphic replacement textures after orthopyroxene and olivine, respectively.
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Scanning electron microscope images of (a–c) lizardite 1 T ± chrysotile 2M...

Scanning electron microscope images of (a–c) lizardite 1 T ± chrysotile 2M...

Published: 30 September 2019
Fig. 4. Scanning electron microscope images of (a–c) lizardite 1 T ± chrysotile 2M c1 mixtures in recrystallized mesh texture and non-pseudomorphic textures (samples FL-08-11 and SAL-07-02) and of (d) platy lizardite 1 T bastite serpentine (sample FL-10-10).
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Plots of Si + Al/2 + Cr/2 cations vs. Fe cations per seven oxygen formula u...

Plots of Si + Al/2 + Cr/2 cations vs. Fe cations per seven oxygen formula u...

Published: 01 May 2014
as that in a . ( d ) Compositions of bastites and relic orthopyroxene in harzburgite. Data of bastites plot along a trend toward Fe 3+ -serpentine.
Journal Article

Exsolution and hydration of pyroxenes from partially serpentinized harzburgites

C. Viti, M. Mellini, C. Rumori
Published: 01 August 2005
Mineralogical Magazine (2005) 69 (4): 491–507.
DOI: https://doi.org/10.1180/0026461056940265
...F ig . 1. BSE images of: ( a ) partially-hydrated bastite (up to millimetric), with preserved opx core, surrounded by serpentine (serp). Arrows indicate inclusions and exsolved cpx. ( b ) Euhedral, elongated and bleb-like inclusions of cpx within opx-M, often surrounded by a thin rim...
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Journal Article

Chrysotile asbestos at Woodsreef, New South Wales

R. A. Glen, B. C. Butt
Journal: Economic Geology
Published: 01 August 1981
Economic Geology (1981) 76 (5): 1153–1169.
DOI: https://doi.org/10.2113/gsecongeo.76.5.1153
..., or along cleavage planes in bastite grains. Within these cracks, fiber formation took place by solution and recrystallization. As growth kept pace with the opening of cracks, the fibers became elongate parallel to the direction of maximum elongation in the XY plane of the strain ellipsoid. This fiber...
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