碎屑岩脈(英語:clastic dike)是沉積物充填到岩石裂縫中的岩脈。碎屑岩脈通過液化注入(加壓孔隙流體的流動)或通過水、風和重力的沉積形成[1]。碎屑岩脈通常是垂直的或接近垂直的。厘米級寬度很常見,但厚度範圍從毫米到米。長度通常是寬度的許多倍。 在全世界的沉積盆地沉積物中都發現了碎屑岩脈[2][3] [4]。
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