scholarly journals Mantle Xenoliths from the Quaternary Pali-aike Volcanic Field of Southernmost South America: Implications for the Accretion of Phanerozoic Continental Lithosphere

2019 ◽  
Keyword(s):  
South America ◽  
Volcanic Field ◽  
Mantle Xenoliths ◽  
Continental Lithosphere

Evidence from mantle xenoliths for relatively thin (<100 km) continental lithosphere below the Phanerozoic crust of southernmost South America

Lithos ◽  
1999 ◽  
Vol 48 (1-4) ◽  
pp. 217-235 ◽  
Author(s):  
Charles R Stern ◽  
Rolf Kilian ◽  
Bettina Olker ◽  
Eric H Hauri ◽  
T.Kurtis Kyser
Keyword(s):  
South America ◽  
Mantle Xenoliths ◽  
Continental Lithosphere

scholarly journals Slab-derived metasomatism in the Carpathian-Pannonian mantle revealed by investigations of mantle xenoliths from the Bakony-Balaton Highland Volcanic Field

Lithos ◽  
2017 ◽  
Vol 286-287 ◽  
pp. 534-552 ◽  
Author(s):  
Laura Créon ◽  
Guillaume Delpech ◽  
Virgile Rouchon ◽  
François Guyot
Keyword(s):  
Volcanic Field ◽  
Mantle Xenoliths

Isotopic and geochemical investigation of a carbonatite-syenite-phonolite diatreme, West Eifel (Germany)

1999 ◽  
Vol 63 (5) ◽  
pp. 615-631 ◽  
Author(s):  
T. R. Riley ◽  
D. K. Bailey ◽  
R. E. Harmer ◽  
H. Liebsch ◽  
F. E. Lloyd ◽  
...  
Keyword(s):  
Close Association ◽  
Alkaline Rock ◽  
Volcanic Field ◽  
Mantle Xenoliths ◽  
Volcanic Complex ◽  
The West ◽  
The North ◽  
Rock Types ◽  
Depleted Mantle ◽  
West Eifel

AbstractThe Rockeskyll complex in the north, central part of the Quaternary West Eifel volcanic field encapsulates an association of carbonatite, nephelinite and phonolite. The volcanic complex is dominated by three eruptive centres, which are distinct in their magma chemistry and their mode of emplacement. The Auf Dickel diatreme forms one centre and has erupted the only known carbonatite in the West Eifel, along with a broad range of alkaline rock types. Extrusive carbonatitic volcanism is represented by spheroidal autoliths, which preserve an equilibrium assemblage. The diatreme has also erupted xenoliths of calcite-bearing feldspathoidal syenite, phonolite and sanidine and clinopyroxene megacrysts, which are interpreted as fragments of a sub-volcanic complex. The carbonate phase of volcanism has several manifestations; extrusive lapilli, recrystallized ashes and calcite-bearing syenites, fragmented during diatreme emplacement.A petrogenetic link between carbonatites and alkali mafic magmas is confirmed from Sr and Nd isotope systematics, and an upper mantle origin for the felsic rocks is suggested. The chemistry and mineralogy of mantle xenoliths erupted throughout the West Eifel indicate enrichment in those elements incompatible in the mantle. In addition, the evidence from trace element signatures and melts trapped as glasses support interaction between depleted mantle and small volume carbonate and felsic melts. This close association between carbonate and felsic melts in the mantle is mirrored in the surface eruptives of Auf Dickel and at numerous alkaline-carbonatite provinces worldwide.

The Pali Aike Volcanic Field, Patagonia: slab-window magmatism near the tip of South America

2000 ◽  
Vol 321 (4) ◽  
pp. 407-427 ◽  
Author(s):  
Massimo D'Orazio ◽  
Samuele Agostini ◽  
Francesco Mazzarini ◽  
Fabrizio Innocenti ◽  
Piero Manetti ◽  
...  
Keyword(s):  
South America ◽  
Volcanic Field ◽  
Slab Window
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