Search Results - "Conceiçao, Rommulo V."

Mantle Xenoliths from Huanul Volcano (Central-West Argentina): A Poorly Depleted Mantle Source under Southern Payenia by Bertotto, Gustavo W., Mazzucchelli, Maurizio, Giovanardi, Tommaso, Conceiçao, Rommulo V., Zanetti, Alberto, Schilling, Manuel E., Bernardi, Mauro I., Ponce, Alexis D., Jalowitzki, Tiago, Gervasoni, Fernanda, Cipriani, Anna

“…Huanul is a shield volcano with several lava flows hosting mantle xenoliths erupted during the Pleistocene (0.84 ± 0.05 Ma). It is located in the southern part…”
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Pristine helium from the Karoo mantle plume within the shallow asthenosphere beneath Patagonia by Jalowitzki, Tiago, Sumino, Hirochika, Conceição, Rommulo V., Schilling, Manuel E., Bertotto, Gustavo W., Tassara, Andrés, Gervasoni, Fernanda, Orihashi, Yuji, Nagao, Keisuke, Rocha, Marcelo Peres, Rodrigues, Rodrigo Antonio de Freitas

“…Mantle xenoliths usually represent fragments derived from the depleted and degassed lithospheric mantle with 3 He/ 4 He isotope ratios (6 ± 1 R A ) lower than…”
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A review of 3.66 to 2.77 Ga crustal differentiation in the northern São Francisco Craton, Brazil by Gordilho Barbosa, Rafael, Ferreira, Alanielson, Leitzke, Felipe P., Dos Santos, Thaiane N., Conceição, Rommulo V., Martin, Hervé

“…The Archaean crustal evolution of the northern São Francisco Craton (SFC) reveals significant similarity with Kaapvaal-Zimbabwe and Pilbara, cratons,…”
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Partial melting and subduction-related metasomatism recorded by geochemical and isotope (He-Ne-Ar-Sr-Nd) compositions of spinel lherzolite xenoliths from Coyhaique, Chilean Patagonia by Novais-Rodrigues, Eduardo, Jalowitzki, Tiago, Gervasoni, Fernanda, Sumino, Hirochika, Bussweiler, Yannick, Klemme, Stephan, Berndt, Jasper, Conceição, Rommulo V., Schilling, Manuel E., Bertotto, Gustavo W., Teles, Lucas

“…[Display omitted] •We report the first subduction-related helium composition of Patagonian peridotites.•Cryptic metasomatism is observed in anhydrous…”
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Noble gas composition of subcontinental lithospheric mantle: An extensively degassed reservoir beneath Southern Patagonia by Jalowitzki, Tiago, Sumino, Hirochika, Conceição, Rommulo V., Orihashi, Yuji, Nagao, Keisuke, Bertotto, Gustavo W., Balbinot, Eduardo, Schilling, Manuel E., Gervasoni, Fernanda

“…Patagonia, in the Southern Andes, is one of the few locations where interactions between the oceanic and continental lithosphere can be studied due to…”
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Slab-derived components in the subcontinental lithospheric mantle beneath Chilean Patagonia: Geochemistry and Sr–Nd–Pb isotopes of mantle xenoliths and host basalt by Jalowitzki, Tiago, Gervasoni, Fernanda, Conceição, Rommulo V., Orihashi, Yuji, Bertotto, Gustavo W., Sumino, Hirochika, Schilling, Manuel E., Nagao, Keisuke, Morata, Diego, Sylvester, Paul

“…In subduction zones, ultramafic xenoliths hosted in alkaline basalts can yield significant information about the role of potential slab-derived components in…”
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Modeling of subduction components in the Genesis of the Meso-Cenozoic igneous rocks from the South Shetland Arc, Antarctica by Machado, Adriane, Chemale, Farid, Conceição, Rommulo V., Kawaskita, Koji, Morata, Diego, Oteíza, Orlando, Van Schmus, William R.

“…Isotope data and trace elements concentrations are presented for volcanic and plutonic rocks from the Livingston, Greenwich, Robert, King George and Ardley…”
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Study of the TiO2−H2O−B2O3 Ternary System at 7.7 GPa and High Temperatures by Conceição, Rommulo V, Soares, Sérgio R. S, Balzaretti, Naira M, Pereira, Altair S, Costa, Tania M. H, Gallas, Márcia R, da Jornada, João A. H

“…The TiO2−H2O−B2O3 ternary system was studied at high pressure (7.7 GPa) and high temperatures, and a phase diagram is proposed. Depending on the initial…”
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Evolution of Heterogeneous Mantle in the Acampamento Velho and Rodeio Velho Volcanic Events, Camaquã Basin, Southern Brazil by de Almeida, Delia del Pilar M., Conceição, Rommulo V., Chemale, Farid, Koester, Edinei, de Borba, André W., Petry, Karla

“…The Camaquã Basin, developed during the last phases of the Brazilian/Pan-African Orogeny and was filled with a thick volcano-sedimentary succesion, in which…”
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Derivation of potassic (shoshonitic) magmas by decompression melting of phlogopite+pargasite lherzolite by Conceição, R.V, Green, D.H

“…A model metasomatized lherzolite composition contains phlogopite and pargasite, together with olivine, orthopyroxene, clinopyroxene and spinel or garnet as…”
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Sm–Nd isotope geochemistry of metamorphic volcano-sedimentary successions in the São Gabriel Block, southernmost Brazil: evidence for the existence of juvenile Neoproterozoic oceanic crust to the east of the Rio de la Plata craton by Saalmann, K., Hartmann, L.A., Remus, M.V.D., Koester, E., Conceição, R.V.

“…Juvenile Neoproterozoic dioritic, tonalitic, trondhjemitic and granodioritic gneisses in the São Gabriel block, southern Brazil, have been identified by…”
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Andean subduction-related mantle xenoliths: Isotopic evidence of Sr–Nd decoupling during metasomatism by Conceição, R.V., Mallmann, G., Koester, E., Schilling, M., Bertotto, G.W., Rodriguez-Vargas, A.

“…Sr–Nd isotopic analyses on some mantle xenolith samples from the Northern, Southern and Austral Andean volcanic zones exhibit radiogenic Sr enrichment without…”
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Spinel-facies mantle xenoliths from Cerro Redondo, Argentine Patagonia: Petrographic, geochemical, and isotopic evidence of interaction between xenoliths and host basalt by Schilling, M., Conceição, R.V., Mallmann, G., Koester, E., Kawashita, K., Hervé, F., Morata, D., Motoki, A.

“…Cerro Redondo is an ancient cinder cone now almost completely eroded, sited over a sill that corresponds to a sub-volcanic magma chamber, in Santa Cruz…”
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Mantle diversity beneath the Colombian Andes, Northern Volcanic Zone: Constraints from Sr and Nd isotopes by Rodriguez-Vargas, A., Koester, E., Mallmann, G., Conceição, R.V., Kawashita, K., Weber, M.B.I.

“…In order to provide mantle and crustal constraints during the evolution of the Colombian Andes, Sr and Nd isotopic studies were performed in xenoliths from the…”
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Study of the TiO 2 −H 2 O−B 2 O 3 Ternary System at 7.7 GPa and High Temperatures by Conceição, Rommulo V., Soares, Sérgio R. S., Balzaretti, Naira M., Pereira, Altair S., Costa, Tania M. H., Gallas, Márcia R., da Jornada, João A. H.

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