Long-Lived Volcanism on the Lunar Farside Revealed by SELENE Terrain Camera
Long-Lived Volcanism on the Lunar Farside Revealed by SELENE Terrain Camera
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DOI：
10.1126/science.1163382
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发表时间：
2009-02-13
期刊：
影响因子：
56.9
通讯作者：
Josset, Jean-Luc
中科院分区：
文献类型：
--
作者：
Haruyama, Junichi;Ohtake, Makiko;Josset, Jean-Luc
我们根据Selene(Selenology And Engineering Explorer)(卡古亚)上的地形相机获得的10米分辨率图像中的陨石坑频率分布，确定了月球背面Mare沉积的模型年龄。在月球背面形成母质沉积物的大部分母质火山活动在30亿年前停止，这表明在此期间月球上的母质火山活动在全球范围内显著减少。然而，月球背面不同位置的几个母马沉积也显示出更年轻的年龄，聚集在类似于25亿年前的水平。这些年轻的年龄表明，月球背面的母火山活动持续的时间比之前认为的要长，可能是断断续续地发生的。
We determined model ages of mare deposits on the farside of the Moon on the basis of the crater frequency distributions in 10- meter- resolution images obtained by the Terrain Camera on SELENE ( Selenological and Engineering Explorer) ( Kaguya). Most mare volcanism that formed mare deposits on the lunar farside ceased at similar to 3.0 billion years ago, suggesting that mare volcanism on the Moon was markedly reduced globally during this period. However, several mare deposits at various locations on the lunar farside also show a much younger age, clustering at similar to 2.5 billion years ago. These young ages indicate that mare volcanism on the lunar farside lasted longer than was previously considered and may have occurred episodically.