Zinc isotope evidence for a large-scale carbonated mantle beneath eastern China

Zinc isotope evidence for a large-scale carbonated mantle beneath eastern China

A large set of zinc (Zn) stable isotope data for continental basalts from eastern China were reported to investigate the application of Zn isotopes as a new tracer of deep carbonate cycling. All of the basalts with ages of 120 Ma basalts from eastern China (0.27±0.06‰; 2sd). Given that Zn isotope fr...

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Veröffentlicht in:Earth and planetary science letters 2016-06, Vol.444, p.169-178
Hauptverfasser: Liu, Sheng-Ao, Wang, Ze-Zhou, Li, Shu-Guang, Huang, Jian, Yang, Wei
Format: Artikel
Sprache:eng
Schlagworte:
Basalt
carbonate cycling
Carbonates
China
continental basalts
eastern China
Isotopes
Mantle
Melting
Peridotite
Zinc
zinc isotopes
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Zusammenfassung:A large set of zinc (Zn) stable isotope data for continental basalts from eastern China were reported to investigate the application of Zn isotopes as a new tracer of deep carbonate cycling. All of the basalts with ages of 120 Ma basalts from eastern China (0.27±0.06‰; 2sd). Given that Zn isotope fractionation during magmatic differentiation is limited (≤0.1‰), the elevated δ66Zn values reflect the involvement of isotopically heavy crustal materials (e.g., carbonates with an average δ66Zn of ∼0.91‰) in the mantle sources. SiO2 contents of the
ISSN:0012-821X
1385-013X
DOI:10.1016/j.epsl.2016.03.051