The global distribution of pure anorthosite on the Moon
The global distribution of pure anorthosite on the Moon
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DOI：
10.1038/nature08317
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发表时间：
2009-09-10
期刊：
影响因子：
64.8
通讯作者：
Josset, Jean-Luc
中科院分区：
文献类型：
--
作者：
Ohtake, Makiko;Matsunaga, Tsuneo;Josset, Jean-Luc
人们一直认为月球高地地壳是由全球岩浆海洋中的斜长石结晶和漂浮形成的（1，2），尽管实际的生成机制仍然存在争议（2，3）。因此，月球高地地壳的组成对于了解这样一个岩浆海洋的形成和月球的后续演化非常重要。月球科学与工程探测器（SELENE）（5）上的多波段成像仪（4）具有高空间分辨率和优化的光谱覆盖范围，可以清楚地看到月球地壳的组成。在这里，我们报告了高斜长石丰度（接近100体积%）岩石的全球分布，使用SELENE多波段成像仪记录的明确斜长石吸收带。如果上层地壳确实由近100体积%的斜长石，这是显着高于先前估计的82-92体积%。(refs 2，6，7），提供了一个有价值的约束月球岩浆海洋演化模型。
It has been thought that the lunar highland crust was formed by the crystallization and floatation of plagioclase from a global magma ocean(1,2), although the actual generation mechanisms are still debated(2,3). The composition of the lunar highland crust is therefore important for understanding the formation of such a magma ocean and the subsequent evolution of the Moon. The Multiband Imager(4) on the Selenological and Engineering Explorer (SELENE)(5) has a high spatial resolution of optimized spectral coverage, which should allow a clear view of the composition of the lunar crust. Here we report the global distribution of rocks of high plagioclase abundance ( approaching 100 vol.%), using an unambiguous plagioclase absorption band recorded by the SELENE Multiband Imager. If the upper crust indeed consists of nearly 100 vol.% plagioclase, this is significantly higher than previous estimates of 82-92 vol.% (refs 2, 6, 7), providing a valuable constraint on models of lunar magma ocean evolution.