To date, the CM2 class of carbonaceous chondrites has provided the most detailed view of organic synthesis in the early solar system. Organic‐rich chondrites actually observed falling to Earth (“Falls”), for example, the Murchison meteorite in 1969, are even more rare. The April 23, 2019 fall of the Aguas Zarcas meteorite is therefore the most significant CM2 fall since Murchison. Samples collected immediately following the fall provide the rare opportunity to analyze its bulk mineralogy and organic inventory relatively free of terrestrial contamination. According to the Meteoritical Bulletin, Aguas Zarcas (“AZ” or “Zarcas”) is dominated by serpentine, similar to other CM2 chondrites. Likewise, our initial analyses of AZ were meant to give a broad view of its soluble organic inventory relative to other carbonaceous chondrites. We observe that while it is rich in hydrocarbons, carboxylic acids, dicarboxylic acids, sugar alcohols, and sugar acids, some of these classes may be of lesser abundance than in the more well known carbonaceous chondrites such as Murchison. Compared generally with other CM2 meteorites, the most significant finding is the absence, or relatively low levels, of three otherwise common constituents: ammonia, amino, acids, and amines. Overall, this meteorite adds to the building database of prebiotic compounds available to the ancient Earth.

中文翻译：

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Aguas Zarcas（CM2）陨石：早期太阳系有机化学的新见解

迄今为止，CM2类碳质球粒陨石提供了早期太阳系中有机合成的最详细信息。实际上观察到的富含有机物的球粒陨石（“坠落”），例如1969年的默奇森陨石，甚至更为罕见。因此，2019年4月23日的Aguas Zarcas陨石坠落是自Murchison以来最严重的CM2坠落。秋季后立即收集的样品提供了难得的机会来分析其大部分矿物学和有机物资源，而这些矿物和有机物相对没有地面污染。根据气象公报，类似于其他CM2球粒陨石，阿瓜斯·扎尔卡斯（“ AZ”或“ Zarcas”）以蛇纹石为主。同样，我们对AZ的初步分析旨在给出其相对于其他碳质球粒陨石的可溶性有机物存量的广阔视野。我们观察到，尽管它富含烃，羧酸，二羧酸，糖醇和糖酸，但其中某些类别的丰度要比更知名的碳质球粒陨石（如Murchison）小。一般而言，与其他CM2陨石相比，最显着的发现是不存在三种相对常见的成分或含量相对较低：氨，氨基酸，酸和胺。总体而言，这种陨石为古代地球提供了益生元化合物的建筑数据库。或三种其他常见成分的相对较低含量：氨，氨基酸，酸和胺。总体而言，这种陨石为古代地球提供了益生元化合物的建筑数据库。或三种其他常见成分的相对较低含量：氨，氨基酸，酸和胺。总体而言，这种陨石为古代地球提供了益生元化合物的建筑数据库。