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中国登月探测器“嫦娥四号”今年1月在月球背面着陆，英国《自然》杂志周三发布了该月球探测任务一项重大发现。

嫦娥四号地面应用系统总指挥、中科院国家天文台副台长李春来率领团队，利用就位光谱探测数据，发现月球背面南极存在橄榄石和低钙辉石等深部物质，为此前科学界对月幔富含橄榄石的推论提供论证。

媒体报道，研究小组将探测器降落在月球南极艾特肯盆地（SPA），该盆地同时拥有太阳系已知其中一个最大的陨石坑。研究人员通过光谱数据，发现该领域月壤光谱的吸收特征，与月球正面月海玄武岩质月壤光谱的吸收特征差别明显。

报道指，该月壤物质中含有相对较多的橄榄石，其次为低钙辉石等，相关矿物组合或源于月幔的深部物质。

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