ABSTRACT The origin of the more than 100 km wide Lycksele ring structure in Sweden has puzzled geoscientists for years. In this short note we present results from field analysis, detailed sampling and laboratory analysis executed in search for evidence of an impact, e.g. shatter cones and shock features in minerals. Both approaches gave negative results and consequently an impact origin could neither be confirmed nor rejected. The circular structure of the Lycksele ring and its central uplift are, however, typical features of large, complex impact structures.

中文翻译：

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Lycksele 环结构——仍然没有证据证明撞击起源

摘要 瑞典超过 100 公里宽的 Lycksele 环结构的起源多年来一直困扰着地球科学家。在这个简短的说明中，我们展示了现场分析、详细采样和实验室分析的结果，以寻找撞击的证据，例如矿物中的破碎锥和冲击特征。两种方法都给出了负面结果，因此无法确认或拒绝影响起源。然而，Lycksele 环的圆形结构及其中央隆起是大型复杂撞击结构的典型特征。