Oxygen Isotopic Compositions of the Cape Ashizuri Granitoids in Southwest Japan
نویسندگان
چکیده
منابع مشابه
Oxygen Isotopic Compositions and Degree of Alteration of Cr Chondrites
Although hydrously altered, CR chondrites are among the most primitive samples of the solar nebula because of no evidence for thermal or shock metamorphism [1], high presolar grain abundances [2], and perhaps because of their solar refrac-tory lithophile/Mg ratios [3]. Previous O-isotope measurements showed that CR chondrites form a mixing line of slope ~ 0.7 with a rather large scatter [4]. We...
متن کاملOxygen and carbon isotopic compositions of gases respired by humans.
Oxygen-isotope fractionation associated with respiration in human individuals at rest is linearly related to the fraction of the O2 utilized in the respiration process. The slope of this relationship is affected by a history of smoking, by vigorous exercise, and by the N2/O2 ratio of the inhaled gas. For patients who suffer anemia-related diseases, the slope of this relationship is directly pro...
متن کاملCalcium isotopic compositions of chondrites
We report mass-dependent and mass-independent Ca isotopic variations in nine chondrites from three groups: carbonaceous, ordinary and enstatite chondrites. There is about 0.25‰ per amu, i.e., 1‰ in Ca/Ca, variation in chondrites: carbonaceous chondrites have the lightest Ca isotopes, enstatite chondrites have modeled bulk Earth like Ca isotopes, and ordinary chondrites are in between. The corre...
متن کاملOxygen Isotopic Compositions of Fayalite in the Kaba Cv3 Carbonaceous Chondrite
INTRODUCTION The Fe-rich olivine end-member, fayalite (Fa100), occurs in the matrix, chondrules, CAIs, silicate aggregates, and dark inclusions in the oxidized Kaba and Mokoia CV3 chondrites, where it is associated with magnetite and troilite. To help constrain the origin of the fayalite, we measured O-isotope compositions of fayalite (Fa98-100) from two petrographic settings of the Kaba meteor...
متن کاملSIMS measurements on oxygen-isotopic compositions of chondrules and matrix in the Yamato 691 EH3 chondrite
Introduction: Whole rocks, chondrules and matrix from the same chondrite group typically have the same or very similar oxygen-isotopic compositions [e.g., 1]. Among the three major clans of chondrites, enstatite chondrites (ECs) have the most uniform oxygen isotopic compositions (Fig. 1). In order to study oxygen-isotopic heterogeneity of ECs in microscale, we carried out SIMS measurements on c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Resource Geology
سال: 2014
ISSN: 1344-1698
DOI: 10.1111/rge.12054