Sodium-metasomatism of Ca-Al-rich inclusions in the anomalous carbonaceous chondrite Ningqiang
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چکیده
منابع مشابه
Short-lived chlorine-36 in a Ca- and Al-rich inclusion from the Ningqiang carbonaceous chondrite.
Excesses of sulfur-36 in sodalite, a chlorine-rich mineral, in a calcium- and aluminum-rich inclusion from the Ningqiang carbonaceous chondrite linearly correlate with chorine/sulfur ratios, providing direct evidence for the presence of short-lived chlorine-36 (with a half-life of 0.3 million years) in the early solar system. The best inferred (36Cl/35Cl)o ratios of the sodalite are approximate...
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Introduction: Opaque assemblages (OAs) are very complex objects in CV3 chondrites. They consist of Ni-rich metal, Fe-oxides, sulfides, phosphates, silicates, refractory Pt-group element metals (PGMs) and their oxides. OAs occur in CAIs, chondrules, and matrix of CV3 chondrites [1,2]. Some of the phases are refractory and others are volatile. They can consist of highly reduced or highly oxidized...
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A metamorphosed olivine-rich aggregate was found in the least metamorphosed CV3 Y-86009. Although such aggregates were observed in CV3 Mokoia and Vigarano, and CO (CM) Acfer 094 [1-3], their precursors and formation mechanism have not been fully understood. Here, we report mineralogical observations of an olivine-rich aggregate in the Y-86009. The olivine-rich aggregate is embedded in matrix. I...
متن کاملRESOLVED TIME DIFFERENCE BETWEEN CALCIUM-ALUMINUM-RICH INCLUSIONS AND THEIR WARK LOVERING RIMS INFERRED FROM Al-Mg CHRONOLOGY OF TWO INCLUSIONS FROM A CV3 CARBONACEOUS CHONDRITE
Introduction: The refractory Calcium-Aluminumrich Inclusions (CAIs) preserve petrographic and geochemical records of the earliest events that shaped our Solar System. Absolute high-resolution Pb-Pb dating of CAIs has revealed them to be the oldest solids in the Solar System [1-4]. Another useful high-resolution relative dating technique is the Al-Mg short-lived chronometer which has been used e...
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ژورنال
عنوان ژورنال: Journal of Mineralogical and Petrological Sciences
سال: 2009
ISSN: 1345-6296,1349-3825
DOI: 10.2465/jmps.090621a