scholarly journals Oxidation State of the Lithospheric Mantle below the Massif Central, France

2014 ◽  
Vol 55 (12) ◽  
pp. 2457-2480 ◽  
Author(s):  
Laura Uenver-Thiele ◽  
Alan B. Woodland ◽  
Hilary Downes ◽  
Rainer Altherr
Keyword(s):  
Oxidation State ◽  
Lithospheric Mantle ◽  
Massif Central

Contrasting lithospheric mantle domains beneath the Massif Central (France) revealed by geochemistry of peridotite xenoliths

2000 ◽  
Vol 181 (3) ◽  
pp. 359-375 ◽  
Author(s):  
Xavier Lenoir ◽  
Carlos J. Garrido ◽  
Jean-Louis Bodinier ◽  
Jean-Marie Dautria
Keyword(s):  
Lithospheric Mantle ◽  
Massif Central ◽  
Peridotite Xenoliths

scholarly journals Oxidation State of the Lithospheric Mantle Beneath Komsomolskaya–Magnitnaya Kimberlite Pipe, Upper Muna Field, Siberian Craton

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 740 ◽  
Author(s):  
Anna Dymshits ◽  
Igor Sharygin ◽  
Zhe Liu ◽  
Nester Korolev ◽  
Vladimir Malkovets ◽  
...  
Keyword(s):  
Oxygen Fugacity ◽  
Oxidation State ◽  
Siberian Craton ◽  
Lithospheric Mantle ◽  
Redox State ◽  
Kimberlite Pipe ◽  
Good Explanation ◽  
Redox Conditions ◽  
Lateral Heterogeneity ◽  
Physical Processes

The oxidation state of the mantle plays an important role in many chemical and physical processes, including magma genesis, the speciation of volatiles, metasomatism and the evolution of the Earth’s atmosphere. We report the first data on the redox state of the subcontinental lithospheric mantle (SCLM) beneath the Komsomolskaya–Magnitnaya kimberlite pipe (KM), Upper Muna field, central Siberian craton. The oxygen fugacity of the KM peridotites ranges from −2.6 to 0.3 logarithmic units relative to the fayalite–magnetite–quartz buffer (∆logfO2 (FMQ)) at depths of 120–220 km. The enriched KM peridotites are more oxidized (−1.0–0.3 ∆logfO2 (FMQ)) than the depleted ones (from −1.4 to −2.6 ∆logfO2 (FMQ)). The oxygen fugacity of some enriched samples may reflect equilibrium with carbonate or carbonate-bearing melts at depths >170 km. A comparison of well-studied coeval Udachnaya and KM peridotites revealed similar redox conditions in the SCLM of the Siberian craton beneath these pipes. Nevertheless, Udachnaya peridotites show wider variations in oxygen fugacity (−4.95–0.23 ∆logfO2 (FMQ)). This indicates the presence of more reduced mantle domains in the Udachnaya SCLM. In turn, the established difference in the redox conditions is a good explanation for the lower amounts of resorbed diamonds in the Udachnaya pipe (12%) in comparison with the KM kimberlites (33%). The obtained results advocate a lateral heterogeneity in the oxidation state of the Siberian SCLM.

scholarly journals Metasomatic Processes Revealed by Trace Element and Redox Signatures of the Lithospheric Mantle Beneath the Massif Central, France

2017 ◽  
Vol 58 (3) ◽  
pp. 395-422 ◽  
Author(s):  
Laura Uenver-Thiele ◽  
Alan B. Woodland ◽  
Hans-Michael Seitz ◽  
Hilary Downes ◽  
Rainer Altherr
Keyword(s):  
Trace Element ◽  
Lithospheric Mantle ◽  
Massif Central
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