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magnesiohastingsite

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Journal Article

Fluoro-magnesiohastingsite from Dealul Uroi (Hunedoara county, Romania) : Mineral data and crystal structure of a new amphibole end-member Available to Purchase

Hans-Peter BOJAR, Franz WALTER
Published: 01 July 2006
European Journal of Mineralogy (2006) 18 (4): 503–508.
DOI: https://doi.org/10.1127/0935-1221/2006/0018-0503
...Hans-Peter BOJAR; Franz WALTER Abstract The new mineral fluoro-magnesiohastingsite, ideally (Na,K,Ca)Ca 2 (Mg,Fe 3+ ,Al,Ti) 5 (Si,Al) 8 0 22 F 2 a member of the calcic-amphibole-group, occurs in small cavities of an altered hematite-rich xenolith in the quaternary trachyandesite at Dealul Uroi...
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Journal Article

THE COEXISTENCE OF MELTS OF HYDROUS COPPER CHLORIDE, SULFIDE AND SILICATE COMPOSITIONS IN A MAGNESIOHASTINGSITE CUMULATE, TUBAF SEAMOUNT, PAPUA NEW GUINEA Available to Purchase

Axel D. Renno, Leander Franz, Thomas Witzke, Peter M. Herzig
Published: 01 February 2004
The Canadian Mineralogist (2004) 42 (1): 1–16.
DOI: https://doi.org/10.2113/gscanmin.42.1.1
... with a complex system of silicate melts was found in a xenolith of magnesiohastingsite-dominant cumulate from the TUBAF Seamount, near Lihir Island, in Papua New Guinea. The cumulate formed less than 1.5 Ma ago in a magma chamber in the oceanic crust. Petrographic observations give evidence for the coexistence...
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View PDF for article title, THE COEXISTENCE OF MELTS OF HYDROUS COPPER CHLORIDE, SULFIDE AND SILICATE COMPOSITIONS IN A <span class="search-highlight">MAGNESIOHASTINGSITE</span> CUMULATE, TUBAF SEAMOUNT, PAPUA NEW GUINEA
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Journal Article

Strontian fluoro-magnesiohastingsite in Alban Hills lavas (Central Italy): constraints on crystallization conditions Available to Purchase

M. Gaeta, C. Freda
Published: 01 December 2001
Mineralogical Magazine (2001) 65 (6): 787–795.
DOI: https://doi.org/10.1180/0026461016560009
...M. Gaeta; C. Freda Abstract A magmatic calcic amphibole ( M4 Ca ≥ 1.50) characterized by large Sr and F contents (SrO>1 wt.%, F>2.5 wt.%) is described. According to the crystal-chemical formula, the amphibole can be classified as a strontian fluoro-magnesiohastingsite and the presence of Sr...
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View PDF for article title, Strontian fluoro-<span class="search-highlight">magnesiohastingsite</span> in Alban Hills lavas (Central Italy): constraints on crystallization conditions
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Journal Article

Experimental Stability Relations of the Hornblende Magnesiohastingsite Available to Purchase

Michel P. Semet, W. S. Ernst
Journal: GSA Bulletin
Published: 01 February 1981
GSA Bulletin (1981) 92 (2_Part_II): 274–357.
DOI: https://doi.org/10.1130/GSAB-P2-92-274
... apparatus and the oxygen buffer method. Magnesiohastingsite, NaCa 2 Mg 4 Fe 3+ Si 6 Al 2 O 22 (OH) 2 , is stable over a wide range of, P and F O 2 conditions. Al-clinopyroxene + olivine + nepheline + spinel ± magnetite ± melt ± fluid, all of variable compositions, are produced upon dehydration...
View PDF for article title, Experimental Stability Relations of the Hornblende <span class="search-highlight">Magnesiohastingsite</span>
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Experimental stability relations of the hornblende magnesiohastingsite: Summary Available to Purchase

MICHEL P. SEMET, W. G. ERNST
Journal: GSA Bulletin
Published: 01 February 1981
GSA Bulletin (1981) 92 (2): 71–74.
DOI: https://doi.org/10.1130/0016-7606(1981)92<71:ESROTH>2.0.CO;2
View PDF for article title, Experimental stability relations of the hornblende <span class="search-highlight">magnesiohastingsite</span>: Summary
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Journal Article

A crystal-chemical study of synthetic magnesiohastingsite Available to Purchase

Michel P. Semet
Published: 01 June 1973
American Mineralogist (1973) 58 (5-6): 480–494.
...Michel P. Semet Abstract Mössbauer and infrared spectra of synthetic magnesiohastingsite (Mh), NaCa 2 Mg 4 Fe 3+ Si 6 Al 2 O 22 (OH) 2 , indicate that, except at high values of f O 2, Fe occurs both as Fe 2+ and Fe 3+ contrary to the ideal formula. The amount of Fe 2+ produced is a function...
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FTIR spectra of fluoro-magnesiohastingsite from Dealul Uroi, Hunedoara district, Romania. The insert shows an enlargement of the near-infrared area. The (OH)-stretching bands of fluoro-magnesiohastingsite (a) are lacking in comparison with pargasite (b), Hunza-valley, Afghanistan and actinolite (c), Großer Greiner mountain, Zillertal, Austria.

FTIR spectra of fluoro-magnesiohastingsite from Dealul Uroi, Hunedoara dist... Available to Purchase

Published: 01 July 2006
Fig. 2. FTIR spectra of fluoro-magnesiohastingsite from Dealul Uroi, Hunedoara district, Romania. The insert shows an enlargement of the near-infrared area. The (OH)-stretching bands of fluoro-magnesiohastingsite (a) are lacking in comparison with pargasite (b), Hunza-valley, Afghanistan
Image
Fluoro-magnesiohastingsite crystals from Dealul Uroi, Hunedoara district, Romania, SEM photograph.

Fluoro-magnesiohastingsite crystals from Dealul Uroi, Hunedoara district, R... Available to Purchase

Published: 01 July 2006
Fig. 1. Fluoro-magnesiohastingsite crystals from Dealul Uroi, Hunedoara district, Romania, SEM photograph.
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Electron-microprobe analyses of fluoro-magnesiohastingsite from Dealul Uroi... Available to Purchase

Published: 01 July 2006
Table 1. Electron-microprobe analyses of fluoro-magnesiohastingsite from Dealul Uroi, Hunedoara district, Romania.
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X-ray powder diffraction data for fluoro-magnesiohastingsite. Available to Purchase

Published: 01 July 2006
Table 2. X-ray powder diffraction data for fluoro-magnesiohastingsite.
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Crystal data and experimental details for fluoro-magnesiohastingsite. Available to Purchase

Published: 01 July 2006
Table 3. Crystal data and experimental details for fluoro-magnesiohastingsite.
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A, B. Major-element plots showing the composition of magnesiohastingsite (VIAl &lt; Fe3+, Leake et al. 1997) from the Boston Creek ferropicrite (BCF), consistent with an igneous origin. C. Major-element plot showing higher Fe3+ content relative to Mg# for the igneous amphibole from the Boston Creek ferropicrite compared to amphiboles from thick, differentiated ultramafic sills in the area. The higher Fe3+ content for the ferropicrite amphibole suggests an increased state of melt oxidation during crystallization.

A, B. Major-element plots showing the composition of magnesiohastingsite ( ... Available to Purchase

Published: 01 October 2005
F ig . 4. A, B. Major-element plots showing the composition of magnesiohastingsite ( VI Al < Fe 3+ , Leake et al. 1997 ) from the Boston Creek ferropicrite (BCF), consistent with an igneous origin. C. Major-element plot showing higher Fe 3+ content relative to Mg# for the igneous
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SELECTED COMPOSITIONS OF CALCIC AMPHIBOLE FROM THE MAGNESIOHASTINGSITE-DOMI... Available to Purchase

Published: 01 February 2004
TABLE 1. SELECTED COMPOSITIONS OF CALCIC AMPHIBOLE FROM THE MAGNESIOHASTINGSITE-DOMINANT CUMULATE, TUBAF SEAMOUNT, PAPUA NEW GUINEA
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Photomicrographs of some characteristic textures observed in silicate-rich portions of CAPR. (a) Fractured xenocrystic clinopyroxene (yellowish grain in the center) surrounded by pale green diopside; other minerals are xenocrystic perovskite (dark brown, center), magnetite (opaque), calcite (colorless) and magnesiohastingsite replacing the clinopyroxene (green to light yellow); (b) magnesiohastingsite (yellowish green) successively replaced by magnesiokatophorite plus richterite (lighter colored, more grayish) and clinochlore (colorless) along fractures; also note perovskite crystal (dark brown) replaced by titanite along the rim; (c) oscillatory-zoned magnesiohastingsite with a richterite rim (lighter-colored); the pale green mineral partly replaced by amphibole is diopside, and the colorless material is primary calcite; (d) replacement of the amphiboles (pale green) by clinochlore (anomalous interference-colors). (a)–(c) Plane-polarized light, (d) crossed polars; width of the field of view is 5.5 mm for all images.

Photomicrographs of some characteristic textures observed in silicate-rich ... Available to Purchase

Published: 01 October 2002
), calcite (colorless) and magnesiohastingsite replacing the clinopyroxene (green to light yellow); (b) magnesiohastingsite (yellowish green) successively replaced by magnesiokatophorite plus richterite (lighter colored, more grayish) and clinochlore (colorless) along fractures; also note perovskite crystal
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Composition space Mg/(Mg+Fetot) - Si (apfu) of xenolithhosted fluoro-magnesiohastingsite and rock forming fluoro-amphiboles (assuming BCa &gt; 0.5; A(Na+K) &gt; 0.5; Ti &lt; 0.5) from Dealul Uroi, Romania. Tie lines and mineral names according to the Caamphibole scheme. The squares refer to xenolith-hosted fluoro-magnesiohastingsite crystals (Table 1). Triangles show the chemical variation of rock-forming fluoro-amphiboles in the trachyandesite (Table 7).

Composition space Mg/(Mg+Fe tot ) - Si (apfu) of xenolithhosted fluoro-magn... Available to Purchase

Published: 01 July 2006
Fig 3. Composition space Mg/(Mg+Fe tot ) - Si (apfu) of xenolithhosted fluoro-magnesiohastingsite and rock forming fluoro-amphiboles (assuming B Ca > 0.5; A (Na+K) > 0.5; Ti < 0.5) from Dealul Uroi, Romania. Tie lines and mineral names according to the Caamphibole scheme. The squares
Journal Article

Calcic amphibole growth and compositions in calc-alkaline magmas: Evidence from the Motru Dike Swarm (Southern Carpathians, Romania) Available to Purchase

Olivier Féménias, Jean-Claude C. Mercier, Collin Nkono, Hervé Diot, Tudor Berza, Mihai Tatu, Daniel Demaiffe
Published: 01 January 2006
American Mineralogist (2006) 91 (1): 73–81.
DOI: https://doi.org/10.2138/am.2006.1869
... evolution (kaersutite → Ti-pargasite → pargasite → Ti-magnesiohastingsite → magnesiohastingsite → edenite → tschermakite → magnesiohornblende) linked to magmatic differentiation from andesitic basalt to rhyolite; and (2) deuteritic alteration of the primary amphibole related to late-emplacement hydrothermal...
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View PDF for article title, Calcic amphibole growth and compositions in calc-alkaline magmas: Evidence from the Motru Dike Swarm (Southern Carpathians, Romania)
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Photomicrographs of deuterically altered gabbro, Coldwell complex, Ontario (crossed polars; width of the field of view is 5.5 mm for both images). (a) Diopside (left upper corner) replaced and mantled by zoned magnesiohastingsite (brown to olive-green); note spherulites of clinochlore (low interference-colors) at the contact between the amphibole and calcite (pinkish white); (b) zoned crystals of magnesiohastingsite–hastingsite (brown, olive-green and purplish blue) partly replaced and overgrown by clinochlore at the contact with calcite (pinkish white).

Photomicrographs of deuterically altered gabbro, Coldwell complex, Ontario ... Available to Purchase

Published: 01 October 2002
F ig . 14. Photomicrographs of deuterically altered gabbro, Coldwell complex, Ontario (crossed polars; width of the field of view is 5.5 mm for both images). (a) Diopside (left upper corner) replaced and mantled by zoned magnesiohastingsite (brown to olive-green); note spherulites of clinochlore
Image
Photomicrographs of deuterically altered gabbro, Coldwell complex, Ontario (crossed polars; width of the field of view is 5.5 mm for both images). (a) Diopside (left upper corner) replaced and mantled by zoned magnesiohastingsite (brown to olive-green); note spherulites of clinochlore (low interference-colors) at the contact between the amphibole and calcite (pinkish white); (b) zoned crystals of magnesiohastingsite–hastingsite (brown, olive-green and purplish blue) partly replaced and overgrown by clinochlore at the contact with calcite (pinkish white).

Photomicrographs of deuterically altered gabbro, Coldwell complex, Ontario ... Available to Purchase

Published: 01 October 2002
F ig . 14. Photomicrographs of deuterically altered gabbro, Coldwell complex, Ontario (crossed polars; width of the field of view is 5.5 mm for both images). (a) Diopside (left upper corner) replaced and mantled by zoned magnesiohastingsite (brown to olive-green); note spherulites of clinochlore
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Variation of major components (apfu) in the composition of amphibole-group minerals from CAPR: large crystals of magnesiohastingsite (1), magnesiokatophorite and richterite replacing magnesiohastingsite (2), high-AZ (3), low-AZ (4) zones and richterite rims (5) in oscillatory-zoned crystals. The compositions of amphiboles from the carbonatites of Arkansas (6), In’Ouzzal (7), Fen (8), Turiy Mys (9) and Newania (10) are plotted for comparison (Samoylov 1977, Viladkar &amp; Wimmenauer 1986, McCormick &amp; Heathcote 1987, Ouzegane et al. 1988, Andersen 1989).

Variation of major components ( apfu ) in the composition of amphibole-grou... Available to Purchase

Published: 01 October 2002
F ig . 5. Variation of major components ( apfu ) in the composition of amphibole-group minerals from CAPR: large crystals of magnesiohastingsite (1), magnesiokatophorite and richterite replacing magnesiohastingsite (2), high-AZ (3), low-AZ (4) zones and richterite rims (5) in oscillatory-zoned
Journal Article

ANOMALOUSLY HIGH δD VALUES IN AN ARCHEAN FERROPICRITIC MELT: IMPLICATIONS FOR MAGMA DEGASSING Available to Purchase

William Edward Stone, Etienne Deloule, Stephen W. Beresford, Marco Fiorentini
Published: 01 October 2005
The Canadian Mineralogist (2005) 43 (5): 1745–1758.
DOI: https://doi.org/10.2113/gscanmin.43.5.1745
...F ig . 4. A, B. Major-element plots showing the composition of magnesiohastingsite ( VI Al < Fe 3+ , Leake et al. 1997 ) from the Boston Creek ferropicrite (BCF), consistent with an igneous origin. C. Major-element plot showing higher Fe 3+ content relative to Mg# for the igneous...
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View PDF for article title, ANOMALOUSLY HIGH δD VALUES IN AN ARCHEAN FERROPICRITIC MELT: IMPLICATIONS FOR MAGMA DEGASSING
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