Insights into the evolution of an alkaline magmatic system: An in situ trace element study of clinopyroxenes from the Ditrău Alkaline Massif, Romania

Abstract

Clinopyroxene is a major constituent in most igneous rock types (hornblendite, diorite, containing phonolitic (tinguaite) magma. This study shows that antecryst recycling, also described for the first time in Ditrău, is a significant process during magma recharge and demonstrates that incorporated crystals can crucially affect the host magma composition and so whole-rock chemical data should be interpreted with great care.

Timing of magmatism of the Ditrău Alkaline Massif, Romania – A review based on new U–Pb and K/Ar data

“…Since its first mention by Lilienbach (1833) the DAM has been studied, including its petrotectonic environment, petrogenetic relations and the timing of magmatism (e.g. Koch, 1876Koch, , 1879Streckeisen, 1938Streckeisen, , 1960Codarcea et al, 1957Codarcea et al, , 1958Bagdasarian, 1972;Streckeisen and Hunziker, 1974;P al-Moln ar and Arva-S os, 1995;Dallmeyer et al, 1997;Kr€ autner and Bindea, 1998;Morogan et al, 2000;P al-Moln ar, 2000P al-Moln ar, , 2010aPan a et al, 2000;Batki et al, 2004Batki et al, , 2014Batki et al, , 2018Fall et al, 2007;P al-Moln ar et al, 2015aP al-Moln ar et al, , 2015b.…”

“…In order to better understand the evolution and magmatic processes of the massif, these data needed to be reconsidered and supplemented by additional, up-to-date age determination. The aim of our studybased on the revision of previous age data and interpretation of new amphibole and biotite K/Ar, as well as titanite and zircon U-Pb ages of amphiboleand pyroxene-rich cumulate, syenite, nepheline syenite and granite samplesis to review and specify the age, time span and sequence of the open-system magmatic processes (e.g., Batki et al, 2018) that played an important role in the formation of the Ditr au Alkaline Massif.…”

Nyílt rendszerű magmás folyamatok: magmakeveredés, kristálycsere és kumulátum-recirkuláció nyomai a Ditrói alkáli masszívumban (Orotva, Románia)

“…Tárgyszavak: diorit, mikroszövet, nyílt rendszerű magmás folyamatok, magmakeveredés, kristálycsere, kumulátum-recirkuláció, Ditrói alkáli masszívum 1994a, 2000) -a térség politikai hovatartozásától függetlenül -alapvetően meghatározták a hazai és főleg a nemzetközi magmás petrográfia nevezéktanának kialakulását. A DAM részletes kutatásának legfontosabb eredményei STRECKEISEN (1952, 1954, 1960), CODARCEA et al (1957, STRECKEISEN & HUNZIKER (1974), JAKAB et al (1987, PÁL-MOLNÁR (1992, 1994a2010a, b), JAKAB (1998), MOROGAN et al (2000, BATKI et al (2004BATKI et al ( , 2014BATKI et al ( , 2018, KOVÁCS & PÁL-MOLNÁR (2005), FALL et al (2007), ALMÁSI et al (2015, PÁL-MOLNÁR et al (2015a, b)…”

LA-ICP-MS Analysis of Clinopyroxenes in Basaltic Pyroclastic Rocks from the Xisha Islands, Northwestern South China Sea

“…Relative to other minerals in mafic-ultramafic rocks, clinopyroxene is considered to be the main carrier for most trace elements and holds a unique further record of magma history [33,34]. The mineral chemistry of relict clinopyroxene in igneous rocks can reflect the characteristics of the primary magma well and has been widely used to study the nature of the original magma and complicated processes that have affected the lithospheric mantle [21,[35][36][37][38][39][40][41][42]. Furthermore, clinopyroxenes in altered basalts are of interest, because they often survive in a relatively pristine form, after the matrix and other minerals have been converted to secondary minerals.…”