International audienceVolumetrically minor microsyenites, alkali microgranite and related trachytic dykes intrude early Pliocene OIB-like alkali basaltic and basanitic flows of the Meseta del Lago Buenos Aires in Central Patagonia (47 degrees S-71 degrees 30'W), and occur together with scarce trachytic lava flows. Whole-rock K-Ar ages between 3.98 and 3.08 Ma indicate that the emplacement of these felsic rocks occurred more or less synchronously with that of the post-plateau basaltic sequence that they intrude, during a bimodal mafic-felsic magmatic episode devoid of intermediate compositions. Chemically, these rocks have A(1)-type granitoid affinities and are characterized by high silica and alkali contents (60-68 wt.% SiO2; 8.7-10.8 wt.% ...
Miocene to Quaternary large basaltic plateaus occur in the back-arc domain of the Andean chain in Pa...
Miocene to Quaternary large basaltic plateaus occur in the back-arc domain of the Andean chain in Pa...
The Pali Aike Volcanic Field (PAVF) represents the southernmost occurrence of the Cenozoic back-arc ...
International audienceVolumetrically minor microsyenites, alkali microgranite and related trachytic ...
Volumetrically minor microsyenites, alkali microgranite and related trachytic dykes intrude early Pl...
© 2007 Elsevier B.V. Volumetrically minor microsyenites, alkali microgranite and related trachytic d...
International audienceThe Chile Triple junction is a natural laboratory to study the interactions be...
We present a chronological (K-Ar), petrologic and geochemical study (major and trace elements, Sr- N...
International audienceWe present a chronological (K-Ar), petrologic and geochemical study (major and...
International audienceWe present a chronological (K-Ar), petrologic and geochemical study (major and...
Miocene to Quaternary large basaltic plateaus occur in the back-arc domain of the Andean chain in Pa...
Miocene to Quaternary large basaltic plateaus occur in the back-arc domain of the Andean chain in Pa...
The Pali Aike Volcanic Field (PAVF) represents the southernmost occurrence of the Cenozoic back-arc ...
International audienceVolumetrically minor microsyenites, alkali microgranite and related trachytic ...
Volumetrically minor microsyenites, alkali microgranite and related trachytic dykes intrude early Pl...
© 2007 Elsevier B.V. Volumetrically minor microsyenites, alkali microgranite and related trachytic d...
International audienceThe Chile Triple junction is a natural laboratory to study the interactions be...
We present a chronological (K-Ar), petrologic and geochemical study (major and trace elements, Sr- N...
International audienceWe present a chronological (K-Ar), petrologic and geochemical study (major and...
International audienceWe present a chronological (K-Ar), petrologic and geochemical study (major and...
Miocene to Quaternary large basaltic plateaus occur in the back-arc domain of the Andean chain in Pa...
Miocene to Quaternary large basaltic plateaus occur in the back-arc domain of the Andean chain in Pa...
The Pali Aike Volcanic Field (PAVF) represents the southernmost occurrence of the Cenozoic back-arc ...