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Pleonaste in Boxian meteorite

Pleonaste in Boxian meteorite
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摘要 There are three kinds of occurrence of pleonaste, a rare meteoritic mineral, totally found in Boxian meteorite. They are as the following: (ⅰ) occurring in the inner circle of the chondrule edge, of which a circle texture is composed; (ⅱ) occurring in the state of inclusions, included in an olivine chondrule, with close paragenesis of wadsleyite; (ⅲ) occurring in the state of porphyry. The chondrule in the first occurrence belongs to CA chondrules. The chemical compositions of pleonaste are heterogeneity except for the atomic ratios of Fe/(Mg+Fe), which can be attributed to the following reasons: (ⅰ) they are congenetic minerals; (ⅱ) the heterogeneity of the compositions of the solar clouds in the early states; (ⅲ) the chondrites are the multiple-stage evolution; (ⅳ) the further proof of Boxian meteorite is an unequilibrium common chondrite. There are three kinds of occurrence of pleonaste, a rare meteoritic mineral, totally found in Boxian meteorite. They are as the following: (i) occurring in the inner circle of the chondrule edge, of which a circle texture is composed; (ii) occurring in the state of inclusions, included in an olivine chondrule, with close paragenesis of wadsleyite; (iii) occurring in the state of porphyry. The chondrule in the first occurrence belongs to CA chondrules. The chemical compositions of pleonaste are heterogeneity except for the atomic ratios of Fe/(Mg+ Fe), which can be attributed to the following reasons: (i) they are congenetic minerals; (ii) the heterogeneity of the compositions of the solar clouds in the early states; (iii) the chondrites are the multiple-stage evolution; (iv) the further proof of Boxian meteorite is an unequilibrium common chondrite.
出处 《Chinese Science Bulletin》 SCIE EI CAS 1998年第19期1656-1660,共5页
关键词 RARE pleonaste in METEORITES found genesis. rare pleonaste in meteorites found genesis
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