Results 91 to 100 of about 1,995 (202)

The antecryst compositional influence on Cretaceous alkaline lamprophyre dykes, SE Brazil

open access: yesBrazilian Journal of Geology
The question of whether the antecryst assemblage affects the bulk composition of lamprophyre dykes, and could be responsible for the compositional zonation between their centers and borders is addressed through a detailed study involving four monchiquite
Saulo Gobbo Menezes   +6 more
doaj   +1 more source

Attivazione neutronica: applicazione delle metologie radioanalitiche e strumentali all'indagine geochimica [PDF]

open access: yes, 1979
descrizione delle tecniche analitiche in attivazione neutronica applicabili a rocce e ...
OTTONELLO, GIULIO ARMANDO
core  

O Grupo Araxá na região sul-sudoeste do Estado de Goiás

open access: yesGeologia USP. Série Científica, 2013
Na região S - SW do Estado de Goiás, o Grupo Araxá é constituído por uma sequência de metassedimentos (granada-biotita-quartzo xistos, granada-biotita-quartzo xistos feldspáticos, granada-biotita-quartzo paragnaisses, com muscovita e localmente com ...
Guillermo Rafael Beltran Navarro   +2 more
doaj  

Author Correction: Noble gas isotopes reveal degassing-derived eruptions at Deception Island (Antarctica): implications for the current high levels of volcanic activity. [PDF]

open access: yesSci Rep, 2022
Álvarez-Valero AM   +10 more
europepmc   +1 more source

Partial melting effects on coexisting mineral compositions in upper mantle xenoliths from Assab (Ethiopia) [PDF]

open access: yes, 1978
cristallochimica di rocce ...
PICCARDO G. B.   +1 more
core  

Biotiti e cloriti nelle diverse facies del granito di Baveno-Mottarone (Verbania) [PDF]

open access: yes, 2006
Il plutone di Baveno – Mottarone è costituito da diverse varietà di granito, caratterizzate dalla diversa colorazione dei feldspati. La porzione maggiore e altimetricamente più bassa del plutone è costituita da granito bianco, mentre la parte alta è
L. Ottolini, R. Bocchio, V. Caironi
core  

Petrología cerámica comparativa y análisis composicional de las pinturas por MEB-EDS de estilo Aguada Portezuelo (ca. 600-900 DC) en el valle de Catamarca (Noroeste Argentino)

open access: yesEstudios Atacameños
La cerámica de estilo Aguada Portezuelo del Noroeste Argentino posee un amplio repertorio de técnicas de acabado empleadas principalmente en los tratamientos de superficie y decoración.
Guillermo A. De La Fuente   +3 more
doaj   +1 more source

Evaluation of the remineralizing capacity of silver diamine fluoride on demineralized dentin under pH-cycling conditions. [PDF]

open access: yesJ Appl Oral Sci, 2023
Cifuentes-Jiménez CC   +4 more
europepmc   +1 more source

PETROLOGIA E GEOQUÍMICA DOS STOCKS GRANÍTICOS DE SERRITA, PERNAMBUCO

open access: yesRevista Brasileira de Geociências, 1986
Systematic geologic mapping of three granitic stocks intrusive in intermediate-grade metasediments of the Salgueiro Group, next to Serrita, Pernambuco, revealed ring-structures in two of them. Epidote-bearing and biotite-granodiorites predominare in the cores of the stocks but the rims, usually in topographic relief, are composed of aegirine-granites ...
openaire   +2 more sources

Home - About - Disclaimer - Privacy