Oxygen isotope constraints on the alteration temperatures of CM chondrites

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• 作者：Maximilien J. Verdier-Paolettip>ap>p> ; p>p>maverdier@mnhn.frp> ; Yves Marrocchip>bp> ; Guillaume Avicep>bp> ; Mathieu Roskoszp>ap> ; Andrey Gurenkop>bp> ; Matthieu Gounellep>ap>p> ; p>p>cp>
• 关键词：chondrites ; aqueous alteration ; oxygen isotopes ; carbonates ; alteration temperature ; asteroids
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：458
• 期：Complete
• 页码：273-281
• 全文大小：1758 K
• 卷排序：458

文摘

Carbonate O-isotope compositions of 9 CMs define a continuous trend crossing the TFL. This mass independent trend matches the one defined by bulk CM-COs and matrix (BMC trend). CM water defines a trend (CMW) parallel to the bulk-matrix-carbonate trend (BMC). The distance between BMC and CMW is directly related to CM alteration temperature. Carbonates precipitated at higher temperatures than previously inferred (50–300 °C).