Results 11 to 20 of about 278,731 (238)

A genetic classification of the tholeiitic and calc-alkaline magma series [PDF]

open access: yesGeochemical Perspectives Letters, 2021
The concept of the ‘magma series’ and the distinction between alkaline, calc-alkaline and tholeiitic trends has been a cornerstone in igneous petrology since the early 20th century, and encodes fundamental information about the redox state of divergent ...
Vermeesch, P, Pease, V
core   +6 more sources

Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt [PDF]

open access: yesGeologica Acta, 2007
Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite.
M.K. Azer
doaj   +2 more sources

Coeval calc-alkaline and alkaline Cadomian magmatism in the Bafq, central Iran: Insights into their petrogenesis [PDF]

open access: yes, 2021
The Chah-Gaz and Mishdovan areas in the Bafq magmatic complex, central Iran, contain thick series of terrigenous sediments (the Rizu-Dezu complex), and arc-related calc-alkaline and alkaline igneous rocks.
Sepidbar, Fatemeh   +8 more
core   +1 more source

Geochemical features of granitic rocks using x-ray spectral fluorescence in the Miass region, Southern Ural

open access: yesRUDN Journal of Engineering Research, 2023
The goals of the research are the geochemistry and identification of granite rocks. The granitic rocks are part of the Syrostan massive, which is located in Southern Ural.
Mohammed Abdalla Elsharif Ibrahim   +4 more
doaj   +1 more source

Clues from Ab Initio Calculations on Titanium Isotopic Fractionation in Tholeiitic and Calc-Alkaline Magma Series [PDF]

open access: yes, 2021
Magmatic differentiation produces positive correlations between δ49Ti and SiO2. The equilibrium Ti isotope fractionation factors of Ti-bearing minerals are essential for understanding the mechanisms driving this isotopic fractionation.
Aarons, Sarah M.   +15 more
core   +3 more sources

Fingerprint of magma mixture in the leucogranites: Spectroscopic and petrochemical approach, Kalebalta-Central Anatolia, Türkiye

open access: yesOpen Geosciences, 2023
Leucogranites of Kalebalta in Central Anatolia are composed of plagioclase, quartz, orthoclase, and biotite and contains mafic microgranular enclaves (MME) in sizes ranging from few cm to 70 cm.
Güllü Bahattin, Akşit Asuman
doaj   +1 more source

Generation of normal and adakite-like calc-alkaline magmas in a non-subductional environment: An Sr-O-H isotopic study of the Apuseni Mountains neogene magmatic province, Romania [PDF]

open access: yes, 2007
Neogene magmatism in the Apuseni Mountains of Romania was active between 15 and 7 Ma, with an isolated final eruption at 1.6 Ma. Several groups of magmatic rocks can be distinguished in the province on the basis of ages, trace elements and isotopic ...
Hilary Downes   +11 more
core   +1 more source

Adakitic Paracale Granodiorite in southeastern Luzon, Philippines: A peek at a Proto-Philippine Sea Plate-related magmatic arc

open access: yesJournal of Asian Earth Sciences: X, 2020
This paper describes the geochemistry, petrogenesis and tectonic setting of a silicic pluton, the Paracale Granodiorite (PG), intruded into an ophiolitic suite in southeastern Luzon island, Philippines.
Graciano P. Yumul   +4 more
doaj   +1 more source

Origin of the calc-alkaline igneous rock suite

open access: yesEarth and Planetary Science Letters, 1966
Abstract A model is presented whereby the calc-alkaline series of igneous rocks is derived by partial melting of quartz eclogite at depths of approximately 100–140 km, leaving a residuum of clinopyroxene and garnet. Investigations of the fractional melting and crystallization of synthetic quartz tholeiite, basaltic andesite, andesite, dacite and ...
Trevor H. Green, A.E. Ringwood
openaire   +2 more sources

Tectonic significance of changes in post-subduction Pliocene-Quaternary magmatism in the south east part of the Carpathian-Pannonian Region [PDF]

open access: yes, 2010
The south-eastern part of the Carpathian–Pannonian region records the cessation of convergence between the European platform/Moesia and the Tisza–Dacia microplate.
Downes, H.   +8 more
core   +2 more sources

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