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All abstracts by Dereje Ayalew in conference series: Goldschmidt

(2016) 3He Excess in Air, a New Potential Tracer for Volcanic CO2 Emissions in the Atmosphere
Boucher C, Marty B, Lan T, Mabry J, Burnard P, Boucher P, Zimmermann L, Ayalew D, Fischer T, De Moor JM & Zelenski M

(2014) Precious Opal Deposits at Wegel Tena, Ethiopia: Formation Through Successive Pedogenesis Events
Chauviré B, Rondeau B, Mazzero F & Ayalew D

(2014) Genesis of Precious Opal in the Critical Zone: Role of the Host Rock, Climate, and Biology
Rondeau B, Chauviré B, Fritsch E, Ayalew D & Mazzero F

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