Oxygen isotopes internal equilibrium in magmatic epidote-bearing granitoids
نویسندگان
چکیده
منابع مشابه
Oxygen Isotopes in Meteorites
Oxygen isotope abundance variations in meteorites are very useful in elucidating chemical and physical processes that occurred during the formation of the solar system (Clayton, 1993). On Earth, the mean abundances of the three stable isotopes are O: 99.76%, O: 0.039%, and O: 0.202%. It is conventional to express variations in abundances of the isotopes in terms of isotopic ratios, relative to ...
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Introduction: Planetary objects have preserved various amounts of oxygen derived from isotopically distinct reservoirs reflecting their origins and diverse physico-chemical histories [1]. An O-rich component is preserved in high temperature phases, such as refractory inclusions (CAIs) and some chondrules, whereas meteorite matrices are enriched in a relatively O-poor component [2]. The origin o...
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Introduction: The results of a number of studies seem to indicate that CO3 chondrites can be subdivided into a metamorphic series analogous to that seen in ordinary chondrites [1,2,3]. It has been suggested that this sequence is the result of hydrothermal alteration on the CO parent body [4]. One particularly intriguing feature of CO3 chondrites is the reported general correlation between whole...
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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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ژورنال
عنوان ژورنال: Anais da Academia Brasileira de Ciências
سال: 2002
ISSN: 0001-3765
DOI: 10.1590/s0001-37652002000300043