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Petrology and geochemistry of the back-arc lithospheric mantle beneath eastern Payunia (La Pampa, Argentina): evidence from Agua Poca peridotite xenoliths
(Geochemical Society of Japan, 2013-04)
This paper presents the results of new petrochemical studies carried out on mantle xenoliths hosted in Pleistocene basaltic rocks from the Agua Poca volcano in central-western Argentina. Mantle xenoliths studied are shown ...
Andean subduction-related mantle xenoliths: Isotopic evidence of Sr-Nd decoupling during metasomatism
(ELSEVIER SCIENCE BV, 2005-06)
Sr-Nd isotopic analyses on some mantle xenolith samples from the Northern, Southern and Austral Andean volcanic zones exhibit radiogenic Sr enrichment without dramatic changing of the Nd isotopic composition. This anomalous ...
Zr- AND Ba-RICH MINERALS FROM THE PONTE NOVA ALKALINE MAFIC-ULTRAMAFIC MASSIF, SOUTHEASTERN BRAZIL: INDICATION OF AN ENRICHED MANTLE SOURCE
(MINERALOGICAL ASSOC CANADA, 2009)
Zirconium- and Ba-rich minerals are found in gabbroic rocks from the Ponte Nova alkaline mafic-ultramafic massif in southeastern Brazil. The unusual mineralogical assemblage includes zirconolite, baddeleyite, Ba-rich alkali ...
Subduction Zone Mantle Enrichment by Fluids and Zr-Hf-depleted Crustal Melts as Indicated by Backarc Basalts of the Southern Volcanic Zone, Argentina
(Elsevier Science, 2016-10)
We aim to identify the components metasomatizing the mantle above the subducting Nazca plate under part of the Andean Southern Volcanic Zone (SVZ). We present new major and ICP-MS trace element and Sr, Nd and high-precision ...
Sr-Nd-Pb isotopic constraints on the nature of the mantle sources involved in the genesis of the high-Ti tholeiites from northern Paraná Continental Flood Basalts (Brazil)
(2013-10-01)
There has been little research on geochemistry and isotopic compositions in tholeiites of the Northern region from the Paraná Continental Flood Basalts (PCFB), one of the largest continental provinces of the world. In order ...
Sr-Nd-Pb isotopic constraints on the nature of the mantle sources involved in the genesis of the high-Ti tholeiites from northern Paraná Continental Flood Basalts (Brazil)
(2013-10-01)
There has been little research on geochemistry and isotopic compositions in tholeiites of the Northern region from the Paraná Continental Flood Basalts (PCFB), one of the largest continental provinces of the world. In order ...
Unraveling the Effects of Melt-Mantle Interactions on the Gold Fertility of Magmas
(Frontiers Media, 2020)
The oxidation state of the Earth's mantle and its partial melting products exert a key control on the behavior and distribution of sulfur and chalcophile and siderophile elements between the mantle and crust, underpinning ...
GEOCHRONOLOGY (U-PB/PB-PB) AND ISOTOPIC SIGNATURE (RB-SR/SM-ND) OF THE PALEOPROTEROZOIC GUANAMBI BATHOLITH, SOUTHWEST BAHIA STATE (NE BRAZIL)GEOCHRONOLOGY (U-PB/PB-PB) AND ISOTOPIC SIGNATURE (RB-SR/SM-ND) OF THE PALEOPROTEROZOIC GUANAMBI BATHOLITH, SOUTHWEST BAHIA STATE (NE BRAZIL)
(Sociedade Brasileira de Geologia, 2017)