نتایج جستجو برای: titanite

تعداد نتایج: 277  

Journal: :Journal of South American Earth Sciences 2021

The Luís Alves Terrane in southern Brazil is one of the largest expositions Archean to Paleoproterozoic units that acted as basement for development Neoproterozoic Pan-African/Brasiliano orogenic belts Mantiqueira Province, South America. Combined field observations, petrography, Hf and U-Pb LA-ICP-MS zircon titanite isotopic data are presented this terrane. dataset spans a large time range wit...

Journal: :Proceedings of the Karelian Research Centre of the Russian Academy of Sciences 2019

2001
Peter W. Reiners Kenneth A. Farley

Near-surface tectonic and geomorphic processes involve cooling of rocks through low temperatures (50^2003C). Because rates of helium diffusion in apatite, titanite, and zircon are sensitive to temperature variations in this range, uranium^thorium/helium thermochronometry ((U^Th)/He dating) is well-suited to establishing the timing and rates of these processes in the geologic record. However, be...

داودیان دهکردی, علیرضا,

The study area is located within the shear zone of north Shahrekord. There are many small and medium granitoid plutons that have intruded in the metamorphic rocks with Middle Jurassic in age. These rocks show sharp mylonitic foliation and lineation as the results of undergoing strong deformation.  Most of these granitoid plutons contain the assemblage of quartz + K-feldspar + plagioclase + biot...

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