THE I-XE RECORD OF ALTERATION IN THE ALLENDE CV CHONDRITE
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dc.contributor.author | Pravdivtseva O.V. | |
dc.contributor.author | Krot A.N. | |
dc.contributor.author | Hohenberg C.M. | |
dc.contributor.author | Meshik A.P. | |
dc.contributor.author | Keil K. | |
dc.contributor.author | Weisberg M.K. | |
dc.date.accessioned | 2021-11-27T03:01:33Z | |
dc.date.available | 2021-11-27T03:01:33Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=14031157 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2003, 67, 24, 5011-5026 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/32506 | |
dc.description.abstract | Complex I-Xe and mineralogical studies have been performed on four heavily-altered Allende fine-grained spinel-rich Ca, Al-rich inclusions (CAIs) and four Allende dark inclusions (DIs) showing various degrees of iron-alkali metasomatic alteration. The CAIs are largely composed of Fe-rich spinel, Al-diopside, and secondary nepheline and sodalite. The DIs consist of chondrules and Allende-like matrix composed of lath-shaped fayalitic olivine, nepheline, sodalite, and Ca, Fe-rich pyroxene ± andradite ± FeNi-sulfide nodules. Chondrule phenocrysts are extensively or completely replaced by fayalitic olivine, nepheline, and sodalite; metal nodules are replaced by FeNi-sulfides, andradite and Ca, Fe-rich pyroxenes. The chondrules and matrices are crosscut by Ca, Fe-rich pyroxene ± FeNi-sulfide ± fayalitic olivine veins. DIs are surrounded by continuous Ca-rich rims composed of andradite, wollastonite, kirschsteinite, and Ca, Fe-rich pyroxenes, whereas the outer portions of the inclusions are depleted in Ca. | |
dc.subject | Allende chondrite | |
dc.title | THE I-XE RECORD OF ALTERATION IN THE ALLENDE CV CHONDRITE | |
dc.type | Статья |
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