论文标题
陨石岩质与遗传学：迈向统一的双歧分类
Meteorite petrology versus genetics: Toward a unified binominal classification
论文作者
论文摘要
The current meteorite taxonomy, a result of two centuries of meteorite research and tradition, entangles textural and genetic terms in a less than consistent fashion, with some taxa (like shergottites) representing varied lithologies from a single putative parent body while others (like pallasites) subsume texturally similar objects of multifarious solar system origins.熟悉的群体概念作为一个主要母体的代表也很难经验定义。有人提出，该分类在整个陨石光谱中明确地变为双歧杆菌，其中涉及岩石学定义的主要岩石类型，而组则保留遗传意义，但不再与代表父母的数量有关的任何假设绑定。因此，陨石的分类将涉及一个类别和群体，以二维的方式类似于范·施密特（Van Schmus）和木材在软骨中的原发性和二级特性的方式。由于最初的群体与当前使用事实的群体没有显着差异，因此对正常陨石的分类治疗（他们的班级都不会带来新信息）几乎不会改变。然而，与高水平或低水平组相结合的类将提供标准化的网格，以表征岩石学和/或同位素不寻常或异常的陨石（构成大多数代表陨石父母的身体），例如，与碳质/非碳二二分章有关。从长远来看，遗传相关群体的合并，岩性混合物的更系统的处理以及软骨/阿登剂转变可以进一步简化命名法。
The current meteorite taxonomy, a result of two centuries of meteorite research and tradition, entangles textural and genetic terms in a less than consistent fashion, with some taxa (like shergottites) representing varied lithologies from a single putative parent body while others (like pallasites) subsume texturally similar objects of multifarious solar system origins. The familiar concept of group as representative of one primary parent body is also difficult to define empirically. It is proposed that the classification becomes explicitly binominal throughout the meteorite spectrum, with classes referring to petrographically defined primary rock types, whereas groups retain a genetic meaning, but no longer tied to any assumption on the number of represented parent bodies. The classification of a meteorite would thus involve both a class and a group, in a two-dimensional fashion analogous to the way Van Schmus and Wood decoupled primary and secondary properties in chondrites. Since groups would not substantially differ, at first, from those in current use de facto, the taxonomic treatment of normal meteorites, whose class would bring no new information, would hardly change. Yet classes combined with high- or low-level groups would provide a standardized grid to characterize petrographically and/or isotopically unusual or anomalous meteorites (which make up the majority of represented meteorite parent bodies) for example, in relation to the carbonaceous/noncarbonaceous dichotomy. In the longer term, the mergers of genetically related groups, a more systematic treatment of lithology mixtures, and the chondrite/achondrite transition can further simplify the nomenclature.
