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白云金矿区煌斑岩和含金石英脉的产状受区域北西、北东向脆性破裂控制。煌斑岩为钾质-富钾质钙碱性煌斑岩,其稀土元素总量高,轻重稀土分馏强烈,大离子亲石元素为“Nb(Ta)-Ti”负异常型,过渡元素配分模式具有幔源岩石的“W”型。该岩石是大别碰撞造山带后碰撞拉伸背景下幔源岩浆活动的结果。
The occurrence of lamprophyre and auriferous quartz veins in Baiyun gold deposit area is controlled by the north west and northeast brittleness ruptures. The lamprophyre is a potassic-potassium-rich, calc-alkaline lamprophyte with a high total rare earth content and a strong fractionation of light and heavy rare earths. The large ion lithophile element is a negative Nb, Ta-negative type, The model has a “W” type of mantle source rock. The rock is the result of mantle-derived magmatic activity in the context of post-collision stretching in the Dabie collision orogenic belt.