Stable oxygen and hydrogen isotope fractionation factors for the Goethite (hematite)-water system
作者: Khawar Sultan
刊名: Oriental Journal of Chemistry, 2015, Vol.31 (1)
来源数据库: Material Science Research India
DOI: 10.13005/ojc/310107
关键词: GoethiteHematiteHydrogen and Oxygen isotopeFractionation factorTemperature
原始语种摘要: This paper reports experimental results on the low-temperature (<100 ºC) δ18O and δ 2H fractionation of goethite (hematite)-water in a closed system. Both goethite (α-FeOOH) and hematite (α-Fe2O3) exhibited closer fractionation factor values but the αHematite-Water value is slightly higher (~0.9932) than the αGoethite-Water (~0.9924) for the 18O isotope. The average fractionation factor (1000 ln2α; at 70 ºC) value for 2H in the goethite-water is determined to be -115.78 which is more negative than the 1000ln18α values for 18O. The isotopic change from initial waters to the final waters in which these minerals were synthesized, was observed to be larger for the δ2H (average~2.02‰) than the δ18O (average~0.55‰). Variations in the fractionation factors of goethite and hematite reported in...
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  • hematite 赤铁矿
  • fractionation 分级
  • water system 供水系统
  • isotope 同位素
  • hydrogen 
  • goethite 针铁石
  • minerals 矿物
  • values 价值观
  • isotopic 同位素置换
  • factor 因素