نتایج جستجو برای: petrography
تعداد نتایج: 1284 فیلتر نتایج به سال:
Introduction: Ca-, Al-rich inclusions (CAIs) from CV chondrites commonly show oxygen isotope heterogeneity among different mineral phases within individual inclusions reflecting the complex history of CAIs in both the solar nebula and/or parent bodies [1]. The degree of isotopic exchange is typically mineralspecific, yielding O-rich spinel, hibonite and pyroxene and O-depleted melilite and anor...
Sayh al Uhaymir 085 is similar to CV3 carbona-ceous chondrites of the oxidized subgroup, and it has some peculiarities and characteristics of CK chondrites. We report on the petrography, mineral chemistry, and oxygen isotopic compositions of Sayh al Uhaymir 085, and discuss its peculiarities and origin. Petrography and mineral chemistry. Sayh al Uhaymir (SaU) 085, a 112 g carbonaceous chondrite...
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