The petrogenetic models of the lunar crust are built on the returned Apollo and Luna samples collected from limited parts of the lunar nearside that are chemically unusual (i.e., material rich in K, Rare Earth Elements, and P [KREEP]) and not representative of the entire lunar lithologic suite. The lunar Mg‐suite is part of this sample collection and ubiquitously has geochemical characteristics indicating the involvement of KREEP in their petrogenesis and seemed to be linked to the Procellarum KREEP Terrain (PKT). However, it is unclear if KREEP is necessary for Mg‐suite magmatism or whether Mg‐suite magmatism was a global event that occurred without significant KREEP contribution, and thus, Mg‐suite rocks outside of the PKT region may exist without containing a significant KREEP signature. Here, we investigate lunar meteorite Northwest Africa (NWA) 10401, an anorthositic troctolitic breccia with a granulitic texture. NWA 10401 shares many characteristics of Apollo Mg‐suite rocks: both its bulk rock composition and alumina content, as well as its mineralogy and mineral chemistry, are more consistent with typical Apollo Mg‐suite rocks, rather than ferroan anorthosites. In addition, olivine‐spinel equilibria calculations indicate that NWA 10401 is consistent with being derived from a common parent to the Apollo Mg‐suite troctolites. However, despite these many shared characteristics, NWA 10401 is strongly depleted in REE, starkly separating it from the typical Apollo Mg‐suite of the PKT. This indicates that NWA 10401 (and pairs) could represent a Mg‐suite component outside the PKT, and thus, KREEP‐poor Mg‐suite magmatism may have been a global phenomenon on the Moon.

中文翻译：

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西北非洲10401的地球化学和岩石成因：一种新型的镁砂岩

月球地壳的岩石成因模型建立在返回的阿波罗和月球样本上，这些样本是从月球附近的有限部位收集的，这些样本在化学上是不寻常的（即，富含K，稀土元素和P [KREEP]的物质）整个月球岩性套件。月球镁套件是该样本集合的一部分，并且普遍具有地球化学特征，表明KREEP参与了其成岩作用，并且似乎与Procellarum KREEP地形（PKT）有关。但是，目前尚不清楚对于镁套房岩浆岩是否需要KREEP，或者镁套房岩浆岩是否是在没​​有重大KREEP贡献的情况下发生的全球性事件，因此，PKT区域以外的镁套件岩可能存在而不含大量KREEP。签名。这里，我们调查了西北非洲的月球陨石（NWA）10401，这是一种具有粒状纹理的无序的八面体角砾岩。NWA 10401具有许多阿波罗镁套件岩的特征：其大块岩石成分和氧化铝含量，以及其矿物学和矿物化学，均与典型的阿波罗镁套件岩更为一致，而不是二茂铁钙铝长石。此外，橄榄石-尖晶石的平衡计算结果表明，NWA 10401与衍生自阿波罗镁套件三聚体的共同母体一致。但是，尽管有许多共同的特征，但NWA 10401的REE却严重耗尽，使其与PKT的典型Apollo镁套房明显分离。这表明NWA 10401（和对）可以代表PKT之外的镁套件成分，因此，