News Release

落向地球的陨石的来源

Peer-Reviewed Publication

Proceedings of the National Academy of Sciences

Limestone containing an 8 cm fossilized meteorite

image: Limestone containing an 8 cm fossilized meteorite that fell on the seafloor 470 million years ago, and a fossil octopus shell. view more 

Credit: Image credit: Birger Schmitz.

科研人员从代表了15个时间窗口的8484公斤沉积岩上发现了大约1万个地外铬尖晶石颗粒,从而建立了在过去5亿年时间里落向地球的陨石古代通量的记录;与陨石落向地球主要是受到大型小行星破碎事件之后的一个级联过程驱动的理论形成对比的是,这些结果提示陨石供给在过去5亿年里大致稳定,多数陨石来自小行星带的一个受限且未被识别出来的区域。

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