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Benjamin Rondeau, Bénédicte Cenki-Tok, Emmanuel Fritsch, Francesco Mazzero, Jean-Pierre Gauthier, Yves Bodeur, Eyassu Bekele, Eloïse Gaillou and Dereje Ayalew (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry: Exploration, Environment, Analysis, 12, 93-104, 28 May 2012

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Year2012
Original EntryBenjamin Rondeau, Bénédicte Cenki-Tok, Emmanuel Fritsch, Francesco Mazzero, Jean-Pierre Gauthier, Yves Bodeur, Eyassu Bekele, Eloïse Gaillou and Dereje Ayalew (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry: Exploration, Environment, Analysis, 12, 93-104, 28 May 2012
Mindat Ref. ID16344511Long-form Identifiermindat:1:5:16344511:7
GUID0
Full ReferenceBenjamin Rondeau, Bénédicte Cenki-Tok, Emmanuel Fritsch, Francesco Mazzero, Jean-Pierre Gauthier, Yves Bodeur, Eyassu Bekele, Eloïse Gaillou and Dereje Ayalew (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry: Exploration, Environment, Analysis, 12, 93-104, 28 May 2012
Plain TextBenjamin Rondeau, Bénédicte Cenki-Tok, Emmanuel Fritsch, Francesco Mazzero, Jean-Pierre Gauthier, Yves Bodeur, Eyassu Bekele, Eloïse Gaillou and Dereje Ayalew (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry: Exploration, Environment, Analysis, 12, 93-104, 28 May 2012

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Wegeltena, Delanta Woreda, North Wollo Zone, Amhara Region, Ethiopia

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Rondeau, Benjamin, Cenki-Tok, Bénédicte, Fritsch, Emmanuel, Mazzero, Francesco, Gauthier, Jean-Pierre, Bodeur, Yves, Bekele, Eyassu, Gaillou, Eloïse, Ayalew, Dereje (2012) Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil. Geochemistry: Exploration, Environment, Analysis, 12 (2). 93-104 doi:10.1144/1467-7873/10-mindep-058
Rondeau, Benjamin, Fritsch, Emmanuel, Mazzero, Francesco, Gauthier, Jean-Pierre, Cenki-Tok, Bénédicte, Bekele, Eyassu, Gaillou, Eloïse (2010) Play-of-Color Opal from Wegel Tena, Wollo Province, Ethiopia. Gems & Gemology, 46 (2) 90-105 doi:10.5741/gems.46.2.90
Rondeau, B., Fritsch, E., Mazzero, F., Gauthier, J.-P., Cenki-Tok, B., Bekele, E., Gaillou, E. (2010) Play-of-Color Opal from Wegeltena, Wollo Province, Ethiopia. Gems & Gemology, Vol. 46:2, 90–105.
Rondeau, Benjamin, Gauthier, Jean-Pierre, Mazzero, Francesco, Fritsch, Emmanuel, Bodeur, Yves, Chauvire, Boris (2013) On the Origin of Digit Patterns in Gem Opal. Gems & Gemology, 49 (3) doi:10.5741/gems.49.3.138
Rondeau, B., Fritsch, E., Tok, B., Mazzero, F. (2010) New opals from Wollo, Ethiopia: Geochemical characterization. Geochimica et Cosmochimica Acta, 74:12, A880.
Chauviré, Boris, Rondeau, Benjamin, Mazzero, Francesco, Ayalew, Dereje (2017) The Precious Opal Deposit At Wegel Tena, Ethiopia: FormationViaSuccessive Pedogenesis Events. The Canadian Mineralogist, 55 (4) 701-723 doi:10.3749/canmin.1700010
Chauviré, B., Rondeau, B., Mazzero, F., Ayalew, D. (2017) The Precious Opal Deposit At Wegel Tena, Ethiopia: Formation VIA Successive Pedogenesis Events. The Canadian Mineralogist, 55:4, 701.
Chauviré, Boris, Rondeau, Benjamin, Alexandre, Anne, Chamard-Bois, Sarah, La, Carole, Mazzero, Francesco (2019) Pedogenic origin of precious opals from Wegel Tena (Ethiopia): Evidence from trace elements and oxygen isotopes. Applied Geochemistry, 101. 127-139 doi:10.1016/j.apgeochem.2018.12.028
Rondeau B., Mazzero F., Bekele E., Gauthier J.-P., Fritsch E. (2009) Gem News International: New play-of-color opal from Welo, Ethiopia. Gems & Gemology, Vol. 45:1, 59–60.
Gaillou, Eloïse; Delaunay, Aurélien; Rondeau, Benjamin; Bouhnik-le-Coz, Martine; Fritsch, Emmanuel; Cornen, Guy; Monnier, Christophe (2008) The geochemistry of gem opals as evidence of their origin. Ore Geology Reviews, 34 (1). doi:10.1016/j.oregeorev.2007.07.004
Fritsch, Emmanuel, Gaillou, Eloïse, Ostroumov, Mikhail, Rondeau, Benjamin, Devouard, Bertrand, Barreau, Alain (2004) Relationship between nanostructure and optical absorption in fibrous pink opals from Mexico and Peru. European Journal of Mineralogy, 16 (5) 743-751 doi:10.1127/0935-1221/2004/0016-0743
 
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