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zincian spinel

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Journal Article
Published: 01 April 2005
The Canadian Mineralogist (2005) 43 (2): 601–622.
...Adriana Heimann; Paul G. Spry; Graham S. Teale Abstract Zincian spinel [(Zn,Fe,Mg)Al 2 O 4 ] is an accessory mineral in a variety of rock types, in particular, metamorphosed massive-sulfide deposits, pegmatites, aluminous metasedimentary rocks, skarns, marbles, and sulfide-bearing granulites...
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Journal Article
Published: 01 December 2002
Mineralogical Magazine (2002) 66 (6): 985–1002.
... between crystals of chrysoberyl, plagioclase and biotite, and as rare inclusions in chrysoberyl. Textural and mineral chemical evidence suggests that chrysoberyl and zincian spinels (chromite to hercynite containing from 2–8 wt.% ZnO) formed during granulite-facies regional metamorphism and probably pre...
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Journal Article
Published: 01 March 1987
The Canadian Mineralogist (1987) 25 (1): 97–104.
Journal Article
Published: 01 March 1986
The Canadian Mineralogist (1986) 24 (1): 147–163.
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<b>Zincian</b> <b>spinel</b> composition in relation to paragenesis (redrawn from  Heiman...
Published: 01 October 2013
F ig . 4. Zincian spinel composition in relation to paragenesis (redrawn from Heimann et al. , 2005 ): (1) marbles; (2) metamorphosed massive sulfide deposits and S-poor rocks in Mg-Ca Al alteration zones; (3) metamorphosed massive sulfide deposits in Fe-Al metasedimentary and metavolcanic
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SUMMARY OF GEOLOGICAL CHARACTERISTICS OF <b>ZINCIAN</b> <b>SPINEL</b>-BEARING SULFIDE LOC...
Published: 01 April 2005
TABLE 1. SUMMARY OF GEOLOGICAL CHARACTERISTICS OF ZINCIAN SPINEL-BEARING SULFIDE LOCALITIES IN COLORADO
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Compositional fields of <b>zincian</b> <b>spinel</b> from (1) marbles, (2) metamorphosed ...
Published: 01 April 2005
F ig . 6. Compositional fields of zincian spinel from (1) marbles, (2) metamorphosed massive-sulfide deposits, (3) granitic pegmatites, and (4) aluminous metasedimentary rocks (after Spry & Scott 1986a ). Individual data-points pertain to zincian spinel compositions derived from this study
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a. Triangular plot of <b>zincian</b> <b>spinel</b> compositions in terms of gahnite, herc...
Published: 01 April 2005
F ig . 8. a. Triangular plot of zincian spinel compositions in terms of gahnite, hercynite and spinel components from worldwide localities in (1) marbles, (2) metamorphosed massive sulfide deposits and S-poor rocks in Mg–Ca–Al alteration zones, (3) metamorphosed massive sulfide deposits in Fe–Al
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F ig . 14. Triangular plot of the composition of <b>zincian</b> <b>spinel</b>
from Perkoa...
Published: 01 November 2003
F ig . 14. Triangular plot of the composition of zincian spinel from Perkoa. The compositional fields of zincian spinel from pegmatite and granite (solid line; Spry and Scott, 1986 ; Morris et al., 1999 ) and metamorphosed VHMS deposits (interrupted line; Spry and Scott, 1986 ) are shown
Journal Article
Journal: Economic Geology
Published: 01 October 1986
Economic Geology (1986) 81 (6): 1446–1463.
...Paul G. Spry; Steven D. Scott Abstract Zincian spinel [(Zn,Fe,Mg)Al 2 O 4 ] is found in a variety of geologic settings including metamorphosed massive sulfide deposits, aluminous metasediments, pegmatites, and marbles. Many spinels in and near metamorphosed massive sulfides have formed...
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Composition of the Nigerian gahnite Ni8967c and of <b>zincian</b> <b>spinels</b> reported...
Published: 01 October 2013
F ig . 3. Composition of the Nigerian gahnite Ni8967c and of zincian spinels reported in the literature: triangular plot in terms of gahnite, hercynite and spinel components. Red square: this work; colour symbols: chemical composition of zincian spinel also characterized by structural
Journal Article
Published: 01 October 1999
Mineralogical Magazine (1999) 63 (5): 743–755.
...P. K. Chattopadhyay Abstract At Mamandur, southern India, zincian spinel is associated with Zn-Pb-Cu sulphide ores, metamorphosed to the granulite facies. The Zn-spinel (X Zn = 0.44-0.82) occurs in assemblages of: (a) cordierite + biotite + sillimanite + sphalerite + pyrite and/or pyrrhotite; (b...
Journal Article
Journal: Economic Geology
Published: 01 November 2003
Economic Geology (2003) 98 (7): 1463–1485.
...F ig . 14. Triangular plot of the composition of zincian spinel from Perkoa. The compositional fields of zincian spinel from pegmatite and granite (solid line; Spry and Scott, 1986 ; Morris et al., 1999 ) and metamorphosed VHMS deposits (interrupted line; Spry and Scott, 1986 ) are shown...
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Journal Article
Journal: Economic Geology
Published: 01 August 1993
Economic Geology (1993) 88 (5): 1114–1134.
... + or - clinopyroxene-bearing metabasites, and (3) a range of compositionally intermediate assemblages distinguished by the coexistence of Fe-Mn, Ca-, and K-bearing metamorphic silicates. Graphite commonly occurs at levels of several modal percent in the altered rocks but magnetite and zincian spinel are absent...
Journal Article
Published: 01 October 1978
American Mineralogist (1978) 63 (9-10): 991–999.
...R. J. Tracy; H. W. Jaffe; P. Robinson Abstract An Adirondack marble contains the assemblage calcite–diopside–forsterite–monticellite, with trace amounts of zincian spinel, titanian andradite, idocrase, and sphalerite. Microprobe analyses indicate that the monticellite and forsterite both have Mg...
Journal Article
Published: 01 June 1988
American Mineralogist (1988) 73 (5-6): 651–656.
... hercynite. The FeO content ranges from 28 to 30 wt%, making it among one of the most Fe-rich zincian högbomites reported in the literature. Apart from the usual mineral assemblage spinel + corundum + chlorite + ilmenite ± rutile, a rare Na-mica (preiswerkite) is also found interfingered with chlorite...
Journal Article
Published: 01 April 2005
The Canadian Mineralogist (2005) 43 (2): 585–599.
.... Associated minor to accessory minerals include manganoan calcite, manganoan and zincian tremolite, Sr-rich epidote, hyalophane, pyrophanite, melanotekite and mimetite. The occurrence and spatial distribution of calderitic garnet, Zn–Mn-rich spinel and hematite constrain oxygen fugacities during metamorphism...
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Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 2913–2929.
...-rich spinel or högbomite in such a setting, although Moleva and Myasnikov ( 1952 ) reported zincian spinel and högbomite (11.12 wt.% ZnO) in a chloritic rock in Russia. Högbomite is a complex Mg-Fe-Al-Ti oxide that occurs in a variety of settings worldwide, typically in high-grade metamorphic rocks...
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Journal Article
Published: 01 October 2013
Mineralogical Magazine (2013) 77 (7): 2941–2953.
...F ig . 4. Zincian spinel composition in relation to paragenesis (redrawn from Heimann et al. , 2005 ): (1) marbles; (2) metamorphosed massive sulfide deposits and S-poor rocks in Mg-Ca Al alteration zones; (3) metamorphosed massive sulfide deposits in Fe-Al metasedimentary and metavolcanic...
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Published: 01 January 2013
EISBN: 9780903056434
... : spinels with a considerable amount of Fe 2+ replacing Mg, with the Mg:Fe 2+ ratio from 3 to 1, are termed ‘pleonaste’. Zinc may substitute for magnesium, giving an isomorphous series from spinel to gahnite, ZnAl 2 O 4 ; these Zn-bearing spinels are termed ‘gahno-spinel’ or ‘zincian spinel’. The Al ion...