Geochemical results are presented from Curiosity's exploration of Vera Rubin ridge (VRR), in addition to the full chemostratigraphy of the predominantly lacustrine mudstone Murray formation up to and including VRR. VRR is a prominent ridge flanking Aeolis Mons (informally Mt. Sharp), the central mound in Gale crater, Mars, and was a key area of interest for the Mars Science Laboratory mission. ChemCam data show that VRR is overall geochemically similar to lower‐lying members of the Murray formation, even though the top of VRR shows a strong hematite spectral signature as observed from orbit. Although overall geochemically similar, VRR is characterized by a prominent decrease in Li abundance and Chemical Index of Alteration across the ridge. This decrease follows the morphology of the ridge rather than elevation and is inferred to reflect a nondepositionally controlled decrease in clay mineral abundance in VRR rocks. Additionally, a notable enrichment in Mn above baseline levels is observed on VRR. While not supporting a single model, the results suggest that VRR rocks were likely affected by multiple episodes of postdepositional groundwater interactions that made them more erosionally resistant than surrounding Murray rocks, thus resulting in the modern‐day ridge after subsequent erosion.

中文翻译：

---

ChemCam仪器观测的火星大风火山口的维拉·鲁宾岭的默里化学成岩作用及成岩作用

地球化学结果来自于好奇号公司对维拉·鲁宾岭（VRR）的勘探，此外还有主要为湖相泥岩Murray地层（直至VRR）的完整化学地层学。VRR是位于火星大风火山口的中央丘Aeolis Mons（非正式地为Sharp山脉）的突出脊线，也是Mars科学实验室任务感兴趣的关键区域。ChemCam数据显示，尽管从轨道上观察到，VRR的顶部显示出很强的赤铁矿光谱特征，但其VRR总体上与Murray地层的下部地球化学相似。尽管总体地球化学特征相似，但VRR的特征是锂丰度和整个脊的化学变化指数显着降低。这种减少遵循的是山脊的形态而不是高程，并且被认为反映了VRR岩石中粘土矿物丰度的非沉积控制性下降。另外，在VRR上观察到Mn明显高于基线水平的富集。尽管不支持单个模型，但结果表明，VRR岩石可能受到沉积后地下水相互作用的多次影响，这使其与周围的Murray岩石相比具有更强的抗腐蚀能力，从而在随后的侵蚀之后形成了现代脊。