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oxydravite

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Journal Article

Diverse Tourmaline Compositions from Orogenic Gold Deposits in the Hutti-Maski Greenstone Belt, India: Implications for Sources of Ore-Forming Fluids

Pranjit Hazarika, Biswajit Mishra, Kamal Lochan Pruseth
Journal: Economic Geology
Published: 01 March 2015
Economic Geology (2015) 110 (2): 337–353.
DOI: https://doi.org/10.2113/econgeo.110.2.337
... to the dravite/oxydravite group, with an evolutionary trend towards magnesio-foitite, and commonly are Mg rich (up to 2.06 apfu) with low Na (<0.61 apfu) and up to 53% X-site vacancies. Characteristics are low abundances of total REE (0.25–0.67× chondrite) and a flat trend, with minor HREE enrichment...
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View PDF for article title, Diverse Tourmaline Compositions from Orogenic Gold Deposits in the Hutti-Maski Greenstone Belt, India: Implications for Sources of Ore-Forming Fluids
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Journal Article

Crystal structure analyses of four tourmaline specimens from the Cleopatra’s Mines (Egypt) and Jabal Zalm (Saudi Arabia), and the role of Al in the tourmaline group

Ferdinando Bosi, Tonči Balić-Žunić, Adel A. Surour
Published: 01 April 2010
American Mineralogist (2010) 95 (4): 510–518.
DOI: https://doi.org/10.2138/am.2010.3357
...Ferdinando Bosi; Tonči Balić-Žunić; Adel A. Surour Abstract Fe-rich “oxydravite” and dravite from the Late Proterozoic ophiolitic mélange of the Arabo-Nubian Shield, located in Egypt and Saudi Arabia, were structurally and chemically characterized by using crystal structure refinement based...
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View PDF for article title, Crystal structure analyses of four tourmaline specimens from the Cleopatra’s Mines (Egypt) and Jabal Zalm (Saudi Arabia), and the role of Al in the tourmaline group
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Al-Fe-Mg ternary diagram of tourmaline coposition. The Ghagri tourmalines plot along oxydravite-povondraite join, similar to the tourmalines from evaporite basins of Bolivia and China. The plots for tourmalines from Bolivia and China are from Henry et al. (2008).

Al-Fe-Mg ternary diagram of tourmaline coposition. The Ghagri tourmalines p...

Published: 01 July 2012
Fig. 7. Al-Fe-Mg ternary diagram of tourmaline coposition. The Ghagri tourmalines plot along oxydravite-povondraite join, similar to the tourmalines from evaporite basins of Bolivia and China. The plots for tourmalines from Bolivia and China are from Henry et al. (2008) .
Image
Classification diagrams for tourmaline from (A) Hutti and Uti and (B) Hira-Buddini, after Henry et al. (2003). Total Fe (Fe2+ + Fe3+) is used as the Fe value. Data for tourmalines from Hutti and Uti fall in the dravite field and extend toward magnesio-foitite, whereas Hira-Buddini tourmaline compositions plot in the dravite/oxydravite and schorl fields.

Classification diagrams for tourmaline from (A) Hutti and Uti and (B) Hira-...

Published: 01 March 2015
tourmaline compositions plot in the dravite/oxydravite and schorl fields.
Journal Article

Ferric-iron-rich tourmaline from the Darasun gold deposit, Transbaikalia, Russia

Ivan A. Baksheev, Vsevolod Yu. Prokof’ev, Vasily O. Yapaskurt, Marina F. Vigasina, Lidiya D. Zorina, Victor N. Solov’ev
Published: 01 February 2011
The Canadian Mineralogist (2011) 49 (1): 263–276.
DOI: https://doi.org/10.3749/canmin.49.1.263
... into account the IR data, we suggest that this tourmaline can be classed as an intermediate member of the povondraite – “oxydravite” series. The second generation overgrows tourmaline-I and occurs also as isolated crystals up to a few tens of μm long ( Fig. 2A ). It is interesting that if a sulfide mineral...
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Journal Article

An Occurrence of Phlogopite-rich Alteration in the Yerington District, Nevada

Simone E. Runyon, Frank K. Mazdab, Pilar Lecumberri-Sanchez, Matthew Steele-MacInnis, Eric Seedorff, M. Darby Dyar
Published: 16 May 2019
The Canadian Mineralogist (2019) 57 (3): 271–294.
DOI: https://doi.org/10.3749/canmin.1800079
... between homogeneous oxy-dravite crystals. Scalloped boundaries between oxydravite cores and dravite overgrowths may represent dissolution-reprecipitation features ( Fig. 4 ; Dutrow & Henry 2000 , Henry et al . 2003 ). The dravite is somewhat variable in major- and minor-element composition ( Table...
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Journal Article

A rare garnet-tourmaline-sillimanite-biotite-ilmenite-quartz assemblage from the granulite-facies region of south-central Massachusetts

Jennifer A. Thomson
Published: 01 November 2006
American Mineralogist (2006) 91 (11-12): 1730–1738.
DOI: https://doi.org/10.2138/am.2006.2231
... at the W-site. These are best called oxydravite tourmalines in which the dominant exchange vector is AlO[R(OH)] −1 . Average excess charge values greater than zero as well as the lack of strong pleochroism suggest that little, if any, Fe 3+ is present ( Medaris et al. 2003 ). F igure 9. Graphs...
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View PDF for article title, A rare garnet-tourmaline-sillimanite-biotite-ilmenite-quartz assemblage from the granulite-facies region of south-central Massachusetts
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Journal Article

NEW MINERAL NAMES

John L. Jambor, Andrew C. Roberts
Published: 01 July 2001
American Mineralogist (2001) 86 (7-8): 939–942.
.... Numerous electron microprobe analyses, assuming the presence of boron, the absence of fluorine, and all Fe as Fe 3+ , are listed for the tourmaline of Alto Chapare. The results suggest an almost continuous solid-solution series from povondraite to ‘oxydravite’ to dravite. Also present is K-rich tourmaline...
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Journal Article

Trace-element geochemistry of pyrite and arsenopyrite: ore genetic implications for late Archean orogenic gold deposits in southern India

Pranjit Hazarika, Biswajit Mishra, Kamal Lochan Pruseth
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 661–678.
DOI: https://doi.org/10.1180/minmag.2016.080.128
... observed along strain fringes ( Fig. 2 a , b ). Inclusions of quartz, calcite, tourmaline, biotite, ilmenite and occasionally scheelite occur in pyrite and arsenopyrite ( Fig. 2 b , d ). Tourmaline in these rocks show compositional variation from dravite/oxydravite towards magnesio-foitite species...
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View PDF for article title, Trace-element geochemistry of pyrite and arsenopyrite: ore genetic implications for late Archean orogenic gold deposits in southern India
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Journal Article

Oxy-vanadium-dravite, NaV 3 (V 4 Mg 2 )(Si 6 O 18 )(BO 3 ) 3 (OH) 3 O: Crystal structure and redefinition of the “vanadium-dravite” tourmaline

Ferdinando Bosi, Leonid Z. Reznitskii, Eugene V. Sklyarov
Published: 01 February 2013
American Mineralogist (2013) 98 (2-3): 501–505.
DOI: https://doi.org/10.2138/am.2013.4243
...-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal of Mineralogy , 16 , 323 – 333 . Novák M. Škoda P. Filip J. Macek I. Vaculovič T. ( 2011 ) Compositional trends in tourmaline from intragranitic NYF pegmatites...
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View PDF for article title, Oxy-vanadium-dravite, NaV 3 (V 4 Mg 2 )(Si 6 O 18 )(BO 3 ) 3 (OH) 3 O: Crystal structure and redefinition of the “vanadium-dravite” tourmaline
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Journal Article

Crystal chemistry of povondraite by single-crystal XRD, EMPA, Mössbauer spectroscopy and FTIR

Ferdinando Bosi, Henrik Skogby, Guy L. Hovis
Published: 28 November 2022
Mineralogical Magazine (2023) 87 (2): 178–185.
DOI: https://doi.org/10.1180/mgm.2022.132
.... and Selway J.B. ( 2004 ) Schorl-oxy-schorl to dravite-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal of Mineralogy , 16 , 323 – 333 . Pesquera...
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View PDF for article title, Crystal chemistry of povondraite by single-crystal XRD, EMPA, Mössbauer spectroscopy and FTIR
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Book Chapter

Characterization of Hydrothermal Alteration at Chigargunta and Bisanatham Gold Deposits, South Kolar Greenstone Belt, Dharwar Craton, India

Author(s)
Debasis Pal, Chinnasamy Sakthi Saravanan, Swapnendu Goon
Book: Gold Mining in India: The Way Forward
Series: Special Publication
Publisher: Geological Society of India
Published: 01 January 2021
DOI: 10.17491/CGSI/2021/165464
EISBN: 978-93-80998-53-4
... the deposits. Each biotite type is compositionally similar for both CG and BN deposits however, differs between the deposits. Tourmalines in SKGB are also of two types. CG tourmaline is mostly of dravite-oxydravite in composition and BN tourmaline compositions varying from schrol-oxyschrol and dravite...
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View PDF for content titled, Characterization of Hydrothermal Alteration at Chigargunta and Bisanatham Gold Deposits, South Kolar Greenstone Belt, Dharwar Craton, India
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Abstract: The South Kolar Greenstone Belt (SKGB) which is the southern extension of the main Kolar belt hosts several gold deposits and prospects. Among them Chigargunta (CG) and Bisanatham (BN) deposits are most significant deposits. Excluding the western lode of CG which is within the mafic volcanic rocks, majority of the auriferous lodes are hosted in the felsic volcanics (Champion Gneiss) that forms the main eastern mineralization system. In BN, mineralisation is hosted mainly within mafic volcanic rocks that are in closer proximity with Bisanatham granite. Different litho-association has certainly impacted in the development of distinct alteration zones which are mineralogically different in each of these prospects. Three distinct alteration zones with specific mineral assemblages were reported in CG and, at least two zones were identified in BN. The present study focuses on alteration mineralogy and its changes within the alteration zones to characterize the hydrothermal alterations of two distinct gold hosting rocks, in terms of mineralogy and mineral chemistry, in SKGB.

Journal Article

Oxy-foitite, □ (Fe 2+ Al 2 )Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 O, a new mineral species of the tourmaline supergroup

Ferdinando Bosi, Henrik Skogby, Ulf Hålenius
Published: 14 February 2017
European Journal of Mineralogy (2017) 29 (5): 889–896.
DOI: https://doi.org/10.1127/ejm/2017/0029-2631
... Prefecture, Japan J. Miner. Petrol. Sci. 109 74 78 Novák et al., 2004 Novák M. Povondra P. Selway J.B. 2004 Schorl-oxy-schorl to dravite-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic Eur. J. Mineral. 16 323 333 Novák et al...
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Journal Article

Fluor-elbaite, Na(Li 1.5 Al 1.5 )Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 F, a new mineral species of the tourmaline supergroup

Ferdinando Bosi, Giovanni B. Andreozzi, Henrik Skogby, Aaron J. Lussier, Yassir Abdu, Frank C. Hawthorne
Published: 01 February 2013
American Mineralogist (2013) 98 (2-3): 297–303.
DOI: https://doi.org/10.2138/am.2013.4285
...-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal of Mineralogy , 16 , 323 – 333 . Novák M. Škoda P. Filip J. Macek I Vaculovič T. ( 2011 ) Compositional trends in tourmaline from intragranitic NYF pegmatites...
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View PDF for article title, Fluor-elbaite, Na(Li 1.5 Al 1.5 )Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 F, a new mineral species of the tourmaline supergroup
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Journal Article

Tourmaline Breccias from the Río Blanco-Los Bronces Porphyry Copper District, Chile: Constraints on the Fluid Source and the Utility of Tourmaline Composition for Exploration

Michael Hohf, Robert B. Trumbull, Patricio Cuadra, Marco Solé
Journal: Economic Geology
Published: 01 June 2023
Economic Geology (2023) 118 (4): 779–800.
DOI: https://doi.org/10.5382/econgeo.4991
... compositions in bedrock and surficial deposits in and around the Casino and Woodjam porphyry deposits in British Columbia, concluding that the “povondraite-oxydravite” trend is among the positive traits of tourmaline from mineralized systems. These studies and our results from the Río Blanco-Los Bronces...
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Journal Article

Thermal equation of state of Li-rich schorl up to 15.5 GPa and 673 K: Implications for lithium and boron transport in slab subduction

Wei Chen, Shanrong Zhang, Mengzeng Wu, Qifa Zhong, Shijie Huang, Kai Wang, Wei Zhao, Jingui Xu, Dawei Fan, Wenge Zhou
Published: 01 December 2024
American Mineralogist (2024) 109 (12): 2095–2104.
DOI: https://doi.org/10.2138/am-2023-9150
... and Planetary Interiors , 148 , 73 – 84 , https://doi.org/10.1016/j.pepi.2004.08.003 . Novák , M. , Povondra , P. , and Selway , J.B. ( 2004 ) Schorl-oxy-schorl to dravite-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal...
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View PDF for article title, Thermal equation of state of Li-rich schorl up to 15.5 GPa and 673 K: Implications for lithium and boron transport in slab subduction
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Journal Article

Princivalleite, Na(Mn 2 Al)Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 O, a new mineral species of the tourmaline supergroup from Veddasca Valley, Varese, Italy

Ferdinando Bosi, Federico Pezzotta, Henrik Skogby, Alessandra Altieri, Ulf Hålenius, Gioacchino Tempesta, Jan Cempírek
Published: 14 January 2022
Mineralogical Magazine (2022) 86 (1): 78–86.
DOI: https://doi.org/10.1180/mgm.2022.3
... and Petrology , 55 , 159 – 176 . Novák M. , Povondra P. and Selway J.B. ( 2004 ) Schorl–oxy-schorl to dravite-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal of Mineralogy , 16 , 323 – 333 . Novák M...
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Journal Article

Uvite, CaMg 3 (Al 5 Mg)(Si 6 O 18 )(BO 3 ) 3 (OH) 3 (OH), a new, but long-anticipated mineral species of the tourmaline supergroup from San Piero in Campo, Elba Island, Italy

Ferdinando Bosi, Cristian Biagioni, Federico Pezzotta, Henrik Skogby, Ulf Hålenius, Jan Cempírek, Frank C. Hawthorne, Aaron J. Lussier, Yassir A. Abdu, Maxwell C. Day, Mostafa Fayek, Christine M. Clark, Joel D. Grice, Darrell J. Henry
Published: 31 May 2022
Mineralogical Magazine (2022) 86 (5): 767–776.
DOI: https://doi.org/10.1180/mgm.2022.54
...]. Novák M. , Povondra P. and Selway J.B. ( 2004 ) Schorl-oxy-schorl to dravite-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal of Mineralogy , 16 , 323 – 333 . Pesquera A. , Gil-Crespo P.P , Torres-Ruiz...
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View PDF for article title, Uvite, CaMg 3 (Al 5 Mg)(Si 6 O 18 )(BO 3 ) 3 (OH) 3 (OH), a new, but long-anticipated mineral species of the tourmaline supergroup from San Piero in Campo, Elba Island, Italy
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Journal Article

Crystal-chemical relations and classification problems in tourmalines belonging to the oxy-schorl–oxy-dravite–bosiite–povondraite series

Ferdinando Bosi, Fernando Cámara, Marco E. Ciriotti, Ulf Hålenius, Leonid Reznitskii, Vincenzo Stagno
Published: 01 June 2017
European Journal of Mineralogy (2017) 29 (3): 445–455.
DOI: https://doi.org/10.1127/ejm/2017/0029-2616
... Scotia . Can. Mineral. , 35 , 79 – 94 . Mattson , S.M. & Rossman , G.R. ( 1984 ): Ferric iron in tourmaline . Phys. Chem. Minerals , 11 , 225 – 234 . Novák , M. , Povondra , P. , Selway , J.B. ( 2004 ): Schorl-oxy-schorl to dravite-oxydravite tourmaline from...
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Journal Article

Lucchesiite, CaFe 2+ 3 Al 6 (Si 6 O 18 )(BO 3 ) 3 (OH) 3 O, a new mineral species of the tourmaline supergroup

Ferdinando Bosi, Henrik Skogby, Marco E. Ciriotti, Petr Gadas, Milan Novák, Jan Cempírek, Dalibor Všianský, Jan Filip
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 1–14.
DOI: https://doi.org/10.1180/minmag.2016.080.067
... , 109 , 74 – 78 . Novák , M. , Povondra , P. and Selway , J.B. ( 2004 ) Schorl-oxy-schorl to dravite-oxydravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic . European Journal of Mineralogy , 16 , 323 – 333 . Novák , M. , Škoda , R...
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