Comment on 鈥淰alence state of titanium in the Wark-Lovering rim of a Leoville CAI as a record of progressive oxidation in the early Solar Nebula鈥?by K.A. Dyl, J.I. Simon and E.D. Young

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• 作者：S.B. Simon^a ; ^{sbs8@uchicago.edu} ; L. Grossman^a ; ^b ; S.R. Sutton^a ; ^c
• 刊名：Geochimica et Cosmochimica Acta
• 出版年：2012
• 期刊代码：27_00167037
• 类别：ear
• 出版时间：15 May, 2012
• 卷：85
• 期：Complete
• 页码：373-376
• 文件大小：299 K

摘要

state that their results confirm the conclusion of J. that the pyroxene in Wark-Lovering rims () found on Ca-, Al-rich refractory inclusions has lower Ti³⁺/Ti^tot ratios than the primary pyroxene in the interiors of inclusions. While true, the claim is misleading because J. concluded that there was no Ti³⁺ in the rims, whereas found Ti³⁺ in 41 of 42 new rim analyses. In addition, J. concluded that rims formed under much more oxidizing conditions, log fOb>2b> 猢?#xA0;IW-1, or 猢?-7 log units higher, than inclusion interiors. The conclusions of J. were disputed by S. and are not supported by the new data of . The present work is intended for clarification of this and other issues.