نتایج جستجو برای: thermobarometry
تعداد نتایج: 187 فیلتر نتایج به سال:
The genesis of Eocene to Early Oligocene plutons and dykes emplaced in the suture zone between two colliding continental blocks southeastern Iran has been subject debate concerning processes that formed magmas influenced their intrusive history. We report geological, geochemical, mineralogical isotope evidence constrains origin Lakhshak plutonic complex. SiO2 contents granodioritic pluton dacit...
Abstract The El Abrigo member of the Diego Hernández Formation (Tenerife, Canary Islands) represents final (170 ka) and most voluminous eruption (>20-km3 DRE) last cycle explosive activity Las Cañadas volcano. It is a dominantly phonolitic ignimbrite containing both mafic banded pumices, suggesting that magma mixing played an important role in triggering modulating eruptive dynamics. Her...
Pichagchi pluton is situated in the northeastern part of the Soursat complex in Sanandaj-Sirjan metamorphic belt of Iran. The pluton with the age of 74.20 Ma is composed mainly granodiorite, diorite, and tonalite in which mafic minerals are biotite and amphibole. In this study, composition of minerals used to describe the nature of the granitic magma and estimate the pressure and temperature at...
We present a comprehensive petrological and geochronological study of single granulite sample from the lithosphere-scale Beraketa shear zone in southern Madagascar to constrain orogenic history Gondwana assembly this region. The studied provides panoply data constraining prograde, retrograde, late metasomatic region via application Ti-in-quartz, Ti-in-zircon, Zr-in-rutile, Al-in-orthopyroxene t...
The Takht-e-Soleyman complex is formed from various rock types including metapelites, metabasites and marbles which are metamorphosed under green schist through amphibolite to granulite facies. The amphibolites have been melted partially under high temperatures and mafic migmatites are formed in this regard. The pick metamorphic minerals of garnet amphibolites have been completely replaced by t...
The Dinaride Ophiolite Belt formed from the Jurassic part of Neotethys. investigated Ozren ophiolite complex in Bosnia and Herzegovina consists peridotites, plagioclase plagiogranites, troctolites other gabbroic rocks, fewer basalts. Lherzolites harzburgites contain corroded ortho- clinopyroxene1 porphyroclasts enclosed olivine matrix. boundaries between aggregates pyroxene1 spinel1 are infille...
The behavior of fluids at the subduction plate interface and their chemical rheological impacts remain poorly constrained. Based on detailed fieldwork, petrographic geochemical analyses thermobarometry, present study documents an example a block-in-matrix ‘mélange’ metasomatized along (Kampos-Lia mélange zone, Cycladic Blueschists, Syros island). We show that this particular zone is preserved f...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید