Results 11 to 20 of about 382,485 (102)
The role of crustal and mantle sources in the genesis of granitoids of the Antarctic Peninsula and adjacent crustal blocks [PDF]
Magmatic rocks from the Antarctic Peninsula show marked variations in isotope composition, which reflect changes in the geodynamic evolution of the peninsula through time. Most Antarctic Peninsula granitoids formed as a result of subduction: they fall on
Millar, I.L. +3 more
core +8 more sources
The origin of Proterozoic massif-type anorthosites: Evidence from interactions between crustal xenoliths and basaltic magma [PDF]
Plagioclase-rich reaction zones occur around numerous aluminous crustal xenoliths within a suite of Palaeogene sub-volcanic basic sheets on the Isle of Mull, NW Scotland.
Preston, R.J. +2 more
core +8 more sources
Este estudo compreende petrografia de sulfetos e veios de quartzo, elementos tracos, maiores e isotopos de Pb em galena, microtermometria e espectrometria Raman em inclusoes fluidas com o objetivo de delinear aspectos temporais e espaciais da circulacao ...
M. Geraldes +2 more
semanticscholar +1 more source
A Global Data Set of Present‐Day Oceanic Crustal Age and Seafloor Spreading Parameters
We present an updated oceanic crustal age grid and a set of complementary grids including spreading rate, asymmetry, direction, and obliquity. Our data set is based on a selected set of magnetic anomaly identifications and the plate tectonic model of ...
M. Seton +8 more
semanticscholar +1 more source
Reconstructing crustal thickness evolution from europium anomalies in detrital zircons
A new data compilation shows that in intermediate to felsic rocks, zircon Eu/Eu* [chondrite normalized Eu/ ] correlates with whole rock La/Yb, which has been be used to infer crustal thickness.
Ming Tang +4 more
semanticscholar +1 more source
Continental growth and the crustal record [PDF]
Funding: Natural Environment Research Council (NERC) (grant NE/J021822/1) and the University of St. Andrews.The continental crust is the archive of Earth history.
Hawkesworth, Chris +2 more
core +1 more source
O Complexo Gabroico Canindé é um corpo máfico-ultramáfico com cerca de 240 km2 intrusivo em rochas do Domínio Geológico Canindé, do Sistema Orogênico Sergipano.
Fábio Bezerra Damasceno +2 more
doaj
Avaliação da contaminação por elementos metálicos dos sedimentos do Estuário Santos - São Vicente
Three approaches were applied to evaluate metal contamination in 41 sediment samples from the Santos - Sao Vicente Estuarine System: normalization to Al, statistical analysis and sediment quality guidelines (SQGs).
M. Hortellani +3 more
semanticscholar +1 more source
Na região entre as cidades de São Francisco Xavier, Monteiro Lobato, Campos do Jordão e São Bento do Sapucaí, estão expostas rochas metamórficas de fácies granulito de média pressão a anfibolito, associadas a Nappe Socorro e ao Terreno Embu.
Rodrigo Vinagre da Costa +2 more
doaj +1 more source
O Complexo Aimorés corresponde a um corpo multi-intrusivo anelar com cerca de 150 km² de exposição. Possui características pós-orogênicas e exibe zonas de misturas de magma no contato e no interior do corpo.
Fernando Machado de Mello +2 more
doaj +1 more source

