The role of crustal and eruptive processes versus source variations in controlling the oxidation state of iron in Central Andean magmas
详细信息 查看全文
- 作者：Stephanie B. Grockea ; b ; GrockeS@si.edu" class="auth_mail" title="E-mail the corresponding author ; Elizabeth Cottrella ; Shanaka de Silvab ; Katherine A. Kelleyc
- 关键词：Central Andean volcanic zone ; crustal assimilation ; oxygen fugacity ; subduction ; wet chemistry
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 April 2016
- 年：2016
- 卷：440
- 期：Complete
- 页码：92-104
- 全文大小：1722 K
文摘
- •
w the MathML source">fO2s recorded by CVZ basaltic andesites bracket those of dacites and rhyolites.
- •
Crustal assimilation/melting of 30–100% does not systematically oxidize magmas.
- •
Crystal fractionation does not systematically oxidize magmas.
- •
Basaltic andesite w the MathML source">fO2s increase systematically with increasing La/Nb.
- •
Greater influence from the subducting slab elevates w the MathML source">fO2.