Results 71 to 80 of about 446 (178)

Unravelling the complex interaction between mantle and crustal magmas encoded in the lavas of San Vincenzo (Tuscany, Italy). Part II: Geochemical overview and modelling

, 2016
This work reports a geochemical overview and modelling of the lavas erupted similar to 4.4 Ma ago at San Vincenzo (Tuscan Magmatic Province, TMP). Although these lavas cover a relatively small area (similar to 10 km(2)), they show very large geochemical ...
Perugini, Diego, RIDOLFI, FILIPPO, RENZULLI, ALBERTO, Braga, Roberto, DEL MORO, STEFANO, Cesare, Bernardo   +5 more
core   +1 more source

The evolution of Neoproterozoic magmatism in Southernmost Brazil: shoshonitic, high-K tholeiitic and silica-saturated, sodic alkaline volcanism in post-collisional basins

Anais da Academia Brasileira de Ciências, 2006
The Neoproterozoic shoshonitic and mildly alkaline bimodal volcanism of Southernmost Brazil is represented by rock assemblages associated to sedimentary successions, deposited in strike-slip basins formed at the post-collisional stages of the Brasilian ...
Sommer Carlos A., Lima Evandro F., Nardi Lauro V. S., Liz Joaquim D., Waichel Breno L.   +4 more
doaj  

Geochemical characterization of Gubanovskaya intrusion of rapakivi granites (Wiborg massif)

Vestnik MGTU
The paper presents new data on geology and composition of rapakivi granites of Gubanovskaya intrusion (Wiborg massif). Petrographic and geochemical characteristics of rapakivi granites of the second (ovoid) and third (trachytoid) phases of intrusion, as ...
Rogova I. V., Skublov S. G., Berezin A. V., Petrov D. A.   +3 more
doaj   +1 more source

Petrogenesis of calc-alkaline and shoshonitic post-collisional Oligocene volcanics of the Cover Series of the Sesia Zone, Western Italian Alps

, 2004
High-K calc-alkaline and shoshonite Oligocene colcanics of the Cover Series of the Sesia Zone ccur within a volcano-sedimentary unit located in the internal part of the Sesia Zone in proximity of the Canavese Line.Published1 ...
Medeot, O., D'Antonio, M., Cigolini, C., Callegari, E.   +3 more
core   +1 more source

Whole-rock Chemistry of Inclusions in the Okueyama Granitic Batholith, Kyushu, SW Japan and Its Origin [PDF]

A lot of inclusions are included in the Okueyama granitic batholith; they are mafic inclusions, mafic double enclaves, xenoliths of gneiss or migmatite and country rocks. The inclusions are enriched in the later-intruded granite to granodiorite.
金丸, 龍夫, 大畑, 聡, 高橋, 正樹   +2 more
core   +1 more source

Derivation of potassic (shoshonitic) magmas by decompression melting of phlogopite+pargasite lherzolite

Lithos, 2004
A model metasomatized lherzolite composition contains phlogopite and pargasite, together with olivine, orthopyroxene, clinopyroxene and spinel or garnet as subsolidus phases to 3 GPa. Previous works established that at ≥1.5 GPa, phlogopite is stable above the dehydration solidus, determined by the melting behaviour of pargasite and coexisting phases ...
Conceicao, R, Green, David
openaire   +2 more sources

Geology, volcanic history and petrology of vulcano (central aeolian archipelago)

, 2013
Vulcano is an active NW-SE-elongated composite volcano located in the central Aeolian archipelago. Based on available radiometric ages and tephrochronology, the exposed volcanism started at c.
De Astis, G., Tranne, Claudio Antonio, Lucchi, F., De Astis, Gianfilippo, La Volpe, L., La Volpe, Luigi, DELLINO, Pierfrancesco, Tranne, C., P. Dellino, Dellino, P., A. Peccerillo, Peccerillo, Angelo, Frezzotti, Maria Luce, Peccerillo, A., Frezzotti, M. L., Lucchi, Federico, L. La Volpe, M. L. Frezzotti, G. De Astis   +18 more
core   +1 more source

Geochemical characteristics of an intracontinental shoshonitic association: the example of the Damavand volcano, Iran

Comptes Rendus. Géoscience, 2002
Lavas of the Quaternary Damavand volcano (Central Alborz, Northern Iran) have been analysed for major and trace elements. The shoshonitic character of this magmatic series is definitively confirmed and most samples correspond to banakites. The Nb, Ta and Ti negative anomalies observed in all lavas suggest that they derive from of a sub-continental ...
Hossein Mehdizadeh, Jean-Michel Liotard, Jean-Marie Dautria   +2 more
openaire   +1 more source

Geochemical and radiogenic isotope probes of Ischia volcano, Southern Italy: Constraints on magma chamber dynamics and residence time

, 2017
The active volcano of Ischia, an island off-shore the city of Naples, Southern Italy, has a discontinuous volcanic activity characterized by caldera-forming paroxysmal eruptions, lava flows, and lava domes, and thus offers the opportunity to study the ...
Tommasini, Simone, Avanzinelli, Riccardo, Heumann, Arnd, Casalini, Martina, de Vita, Sandro, Conticelli, Sandro, Sansivero, Fabio   +6 more
core   +1 more source

Post-Eocene volcanic of the Abazar district, Qazvin, Iran : mineralogical and geochemical evidence for a complex magmatic evolution

, 2012
International audienceThe style of volcanism of post-Eocene volcanism in the Alborz zone of northern Iran is different to that of Eocene volcanism (Karaj Formation).
Bardtinzeff, J.M, Asiabanha, A., Kananian, A., Rahimi, G.   +3 more
core   +3 more sources