Abstract In the Taourirte area (Western High Atlas-Morocco), early Ediacaran volcanic activity is recorded. Volcanic rocks are mainly basalts, basaltic andesites and andesites. Petrological and geochemical studies are performed on the volcanic rocks in order to constrain their magmatic fingerprints and their geodynamic setting. Whole-rock geochemical characteristics, high TiO2 contents ranging from 1.2 to 2.81 wt%, high Zr/Y (5.43–12.08), Zr/Nb (23.81–10.50) and Zr/P2O5 (0.03–0.2) ratios, suggest an intracontinental tholeiitic affinity for these metavolcanites. They have Ti/Y ratio varying from 240 to 1200 and Th/Ta ranging from 0.68 to 5.2 supporting their derivation from an enriched mantle source, akin to that of E-MORB, during an extensional regime. They were deposited in pull-apart basin evolved during a post-collisional regime. Their geochemical signature is a result of complex interaction processes between parental asthenospheric mantle melt and the surrounding crust.

中文翻译：

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taourirte 地区（西高阿特拉斯，摩洛哥）早期埃迪卡拉纪火山岩的地球化学和岩石成因：起源和地球动力学意义

摘要 在陶里尔特地区（Western High Atlas-Morocco），记录了早期埃迪卡拉纪火山活动。火山岩主要有玄武岩、玄武质安山岩和安山岩。对火山岩进行了岩石学和地球化学研究，以限制其岩浆指纹和地球动力学环境。全岩地球化学特征、高 TiO2 含量范围为 1.2 至 2.81 wt%、高 Zr/Y (5.43-12.08)、Zr/Nb (23.81-10.50) 和 Zr/P2O5 (0.03-0.2) 比率，表明大陆内拉斑岩对这些变质火山岩的亲和力。它们的 Ti/Y 比从 240 到 1200 不等，Th/Ta 从 0.68 到 5.2 不等，支持它们在伸展状态期间源自富集地幔源，类似于 E-MORB。它们沉积在碰撞后形成的拉开盆地中。