The influence of melt flux and crustal processing on Re-Os isotope systematics of ocean island basalts: Constraints from Galápagos
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- 作者：S.A. Gibsona ; sally@esc.cam.ac.uk" class="auth_mail" title="E-mail the corresponding author ; C.W. Daleb ; D.J. Geistc ; J.A. Daya ; G. Brü ; gmannd ; K.S. Harppe
- 关键词：osmium isotopes ; ocean island basalts ; Galá ; pagos ; mantle plume ; crustal contamination ; pyroxenite
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：1 September 2016
- 年：2016
- 卷：449
- 期：Complete
- 页码：345-359
- 全文大小：2889 K
文摘
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High MgO Galápagos basalts exhibit a range of 187Os/188Os comparable to global OIB.
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187Os/188Os of Galápagos basalts broadly correlates with distance from plume stem.
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187Os/188Os of Galápagos basalts is influenced by melt flux to the crust.
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Os threshold value for crustal contamination in OIB varies with setting.
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Some regions of lower oceanic crust may have higher 187Os than previously found.