Overall, the analysis shows little evidence for a complementary relationship between typical volcanic and plutonic rocks in which plutons represent unerupted cumulate residues from differentiating magma systems; rather, pluton compositions are dominantly equivalent to those of volcanic rocks. However, subtle...
Lundqvist, Th., Vaasjoki, M., Persson, P.-O., 1998. U-Pb ages of plutonic and volcanic rocks in the Svecofennian Bothnian Basin, Central Sweden, and their implications for the Palaeoproterozoic evolution of the Basin. GFF 120, 357-363....
L. 1966: K-Ar dating of plutonic and volcanic rocks in orogenie helts. In ScHAEFFER, O. A. & ZAHRINGER, J. (Eds.) Potassium-Argon Dating. Springer, Berlin Heidelberg-Gottingen.Armstrong, R. L.: K-Ar dating of plutonic and volcanic rocks in orogenic belts. In: Potassium-argon ...
In the Kyrgyz part of the MTS, volcanic and plutonic rocks extend in a north–south direction from the contact with the North Tianshan (NTS) to the South Tianshan blocks (STS) and overlie and intrude Precambrian igneous and metamorphic units of the MTS, including the telescoped units in the...
basalt- the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene volcanic glass- a kind of natural glass produced when molten lava cools very rapidly
This document is part of Subvolume A1 'Light Metal Systems. Part 1: Selected Systems from Ag-Al-Cu to Al-Cu-Er' of Volume 11 'Ternary Alloy Systems - Phase Diagrams, Crystallographic and Thermodynamic Data critically evaluated by MSIT' of Landolt-Brnstein - Group IV Physical Chemistry. It...
Eocene to Quaternary volcanic and plutonic rocks are exposed in eastern of Kashan in the Urumieh-Dokhtar magmatic belt that located in the Central Iran structural zone. These volcanic rocks have compositions ranging from basaltic andesites, andesites, rhyolite, dacite, tuff to granidiorites. A tot...
In subject area:Physics and Astronomy A volcanic island is an island formed through volcanic activity, typically originating from volcanic and plutonic rocks of various compositions such as basaltic, andesitic, and dacitic. These islands are mainly volcanic in nature and can be associated with island...
Igneous petrogenesis and tectonic setting of plutonic and volcanic rocks of the Cordillera de...Igneous petrogenesis and tectonic setting of plutonic and volcanic rocks of the Cordillera de...Presents a petrologic description and petrogenetic interpretation of the plutonic and volcanic rocks of the Cordi...
These differences in Sr, Ti and P between volcanic and plutonic rocks may be explained by fractionation of plagioclase, a Ti- bearing phase and apatite from the melt in volcanic rocks. This is mirrored by positive SreEu anomalies in some plutonic rocks, which suggests plagioclase accumulation (...