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庐枞盆地与滁州盆地的火山岩岩石组合分别为钾玄岩-安粗岩-粗面岩组合和安粗岩-粗面岩组合,并分别与Fe,Cu矿有成生联系,形成于早白垩世,约130Ma。庐枞盆地与滁州盆地的火山岩组合,具明显不同的化学特征,他们分别为:①SiO2-ALK系统的碱性和亚碱性,②Peacock’s碱钙系统的碱性(A,～50.8)和钙碱性(CA,～57),③SiO2-FeO*/MgO系统中的拉斑玄武质(TH,或Fe质)和钙碱性(CA,或Mg质)。庐枞盆地火山岩母岩浆源于上地幔软流圈,滁州盆地火山岩则源于俯冲的玄武质洋壳,优先富Fe的地幔和优先富Cu的玄武岩源在局部熔融时提供多量的Fe和Cu元素被萃取进入岩浆,致使两个盆地火山岩分别具有Fe与Cu成矿专属性。它们形成于与伊佐奈崎洋俯冲有关的活动大陆边缘火山弧的内带。火山岩组合成矿专属性的讨论为区域成矿潜力评价提供重要参考。谨以此文庆贺常印佛院士80华诞。
The volcanic rock assemblages in Luzong and Chuzhou basins are composed of potash-anambite-facies assemblage and amphibolite-facies assemblage, respectively, and are connected with Fe and Cu minerals respectively and formed in Early Cretaceous World, about 130Ma. The volcanic rock assemblages in the Luzong basin and the Chuzhou basin have distinctly different chemical characteristics. They are: ① basic and sub-alkaline SiO2-ALK systems, ② alkaline (-50.8) and calcium-basic (CA, ~ 57), ③ thylakoid (TH, or Fe) and calc-alkaline (CA, or Mg) in the SiO 2 -FeO * / MgO system. The volcanic rock magmas in the Luzong Basin originate from the upper mantle asthenosphere, while the Chuzhou volcanics originate from the subducted basaltic oceanic crust. The preferential Fe-rich mantle and the preferentially Cu-rich basalt source provide large amounts of Fe and Cu elements during local melting Was extracted into the magma, resulting in two basin volcanic rocks with Fe and Cu mineralization specificity. They are formed in the inner belt of the active continental margin volcanic arc associated with the subduction of the Iszonai Naiyang ocean. The discussion of volcanic assemblage mineralization provides important reference for the evaluation of regional metallogenic potential. With this article, I wish to celebrate the 80th birthday of the Buddhist Association of India.