首页资讯精品鉴赏-颗粒陨石1

精品鉴赏-颗粒陨石1

来源：爱乐趣网时间：2021年11月13日 19:19

原标题：精品鉴赏-颗粒陨石1

具有独特的颗粒结构的陨石成为球粒陨石；除H、He和其他挥发成分外，其化学成分最接近于太阳的成分。颗粒陨石中常含有大量毫米级球粒。但颗粒陨石的术语可以应用于任何成分与太阳接近的陨石，I型碳质球粒陨石虽然没有球粒，也归类于球粒陨石之中。颗粒陨石被认为是原始太阳星云凝聚产生的最原始的物质，但各种颗粒陨石在化学、矿物学、岩石学、同位素成分等方面有很大的差别，表明它们经历了不同程度的变质作用改造，与原始太阳星云物质产生了不同程度的偏离。

Chondrites with unique chondrite structure become chondrites; Except for H, he and other volatile components, its chemical composition is closest to that of the sun. Chondrites often contain a large number of millimeter chondrites. However, the term chondrite can be applied to any meteorite whose composition is close to the sun. Although type I carbonaceous chondrites have no chondrites, they are also classified as chondrites. Chondrites are considered to be the most primitive materials produced by the condensation of primitive solar nebula, but various chondrites have great differences in chemistry, mineralogy, petrology and isotopic composition, indicating that they have undergone varying degrees of metamorphism and deviated from the materials of primitive solar nebula

颗粒陨石主要由4种组分构成，即:颗粒、Fe-Ni金属富钙-铝的难熔包体（Ca-Al-rich inclusions，简称CAIs）和似变形虫状橄榄石集合体（amoeboid olivine aggregates，简称AOAs）及细粒基质。一般学者认为颗粒、金属和难熔包体是在太阳星云内的高温作用（凝聚作用，蒸发作用）形成的，随后许多CAIs、大多数球粒和Fe-Ni金属在其多期加热过程中发生过熔融，基质、一些CAIs和一些颗粒陨石（CH及CB颗粒陨石）中的金属似乎逃避了这些高温星云事件，虽然大多数颗粒陨石在其母体小行星上经受过热的事件（水的蚀变、热变质和冲击变质），但它们未受到熔融和火成分异作用，因此，它们保存了太阳星云内物理和化学作用的记录。拥有非常高的价值，可以用于医疗器械等化学工业~！

Granular meteorites are mainly composed of four components: particles, Fe Ni metal calcium aluminum rich refractory inclusions (CAIS), amoeboid olivine aggregates (AOAs) and fine-grained matrix. It is generally believed that particles, metals and refractory inclusions are formed by high-temperature action (condensation and evaporation) in the solar nebula. Subsequently, many CAIS, most chondrites and Fe Ni metals have melted during their multi-stage heating process. The metals in the matrix, some CAIS and some granular meteorites (CH and CB granular meteorites) seem to escape these high-temperature Nebula events, Although most granular meteorites undergo overheating events (water alteration, thermal metamorphism and Impact metamorphism ）， However, they are not affected by melting and igneous differentiation. Therefore, they preserve the records of physical and chemical actions in the solar nebula. They have very high value and can be used in the chemical industry such as medical devices ~!

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