نتایج جستجو برای: batholith

تعداد نتایج: 422  

Journal: :Journal Of Geophysical Research: Solid Earth 2023

The texture and morphology of igneous zircon indicates magmatic conditions during crystallization can be used to constrain provenance. Zircons from porphyry copper deposits are typically prismatic, euhedral, strongly oscillatory zoned which may differentiate them zircons associated with unmineralized systems. Here, cathodoluminescence images the Quellaveco district, Southern Peru, were collecte...

Journal: :Brazilian Journal of Geology 2022

The Rio Jacaré Batholith (RJB; 617 ± 4 Ma) is inserted in the Poço Redondo Domain, Sergipano Orogenic System. This batholith formed by monzodiorite, quartz monzonite, and with abundant microgranular enclaves (MEs). MEs vary from black to light gray exhibit globular slightly elongated shapes clear-cut, crenulated, cuspate, or, more rarely, diffuse contacts. They correspond diorites, monzodiorite...

Journal: :Geoderma 2022

The characterisation of quartz grains’ chemical and mineralogical properties in sediments sedimentary rocks is widely used provenance studies. This paper analyses grains from the coarse sand fraction soils Quaternary fluvial terraces (Guadalquivir River, southern Spain). tentative soil ages are 0.3 ka (Haplic Fluvisol), 7 Calcisol), 70 (Cutanic Luvisol), 300 (Lixic Calcisol) 600 Luvisol). shed ...

Journal: :Geosphere 2021

Abstract Detrital K-feldspar 40Ar/39Ar thermochronology was conducted on clastic sedimentary rock samples collected from northern exposures of the Upper Cretaceous Nanaimo Group Vancouver Island and adjacent Gulf Islands British Columbia to constrain denudation history local Coast Mountains batholith source region determine origin extraregional sediment supplied basin. Strata deposited between ...

Journal: :Frontiers in Earth Science 2022

South China is a well-known grand felsic igneous rocks province. However, it still controversial and not well understood whether the Mesozoic tectono-magmatic pattern dominated by subduction of paleo-Pacific oceanic plate. In this study, we address question concentrating on long-term evolutionary Guandimiao batholith, which has complex lithofacies with different formation ages can be superb rec...

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