论文标题
美元
$^{26}$Al-$^{26}$Mg isotopic, mineralogy, petrography of a Hibonite-Pyroxene Spherule in Allan Hills 77307 (CO3.03): Implications for the origin and evolution of these objects
论文作者
论文摘要
发现迄今发现的10个hibonite-羟基/玻璃球形是一套罕见的难治性包含物，显示出最大的外来同位素属性（中性富同位素的异常异常（例如，$^{48} $ ca，$ ca，$^{50} $ ti），$^{50} $^$^$^$矿物学主要由几乎没有玻璃或结晶的钙，富含铝的辉石组成。在Allan Hills 77307（CO3.03）中发现了$^{26} $ al-$^{26} $ MG按时间顺序研究以及相对较大（〜120微米直径）的岩石学和矿物学。独特的是，Hibonite和Pyroxene均表现出短暂寿命的现在灭绝的放射性核素$^{26} $不一致，这表明Hibonite和Pyroxene的起源不同和不同的起源区域。原始的岩石学和矿物质学允许辨别其起源和hibonite-螺氧烯/玻璃球体改变的趋势。
10 Hibonite-pyroxene/glass spherules discovered hitherto are a rare suite of refractory inclusions that show the largest range of exotic isotopic properties (anomalies in neutron rich isotopes (e.g., $^{48}$Ca, $^{50}$Ti), abundance of $^{26}$Al) despite their defining simple spherical morphology and mineralogy consisting predominantly of few hibonites nestled within/with glassy or crystallised calcium, aluminium-rich pyroxene. $^{26}$Al-$^{26}$Mg chronological studies along with petrography and mineralogy of a relatively large (~120 micron diameter), found in Allan Hills 77307 (CO3.03) has been performed. Uniquely, both hibonite and pyroxene show discordant abundance of short-lived now-extinct radionuclide $^{26}$Al that suggest disparate and distinct regions of origin of hibonite and pyroxene. The pristine petrography and mineralogy of this inclusion allow discernment of their genesis and trend of alteration in hibonite-pyroxene/glass spherules.
