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辽西南部中生代岩浆活动,在空间上表现为北东向的带状分布,即北东向的火山—侵入岩带;在时间上表现为序列性,即火山喷发—岩浆侵入旋回;在成因(物源)的一致性上,为壳幔混源成因类型;在岩浆分异演化的方向性上,则沿酸度和碱度增高方向演化。侵入岩有由中性—中酸性—酸性—超酸性方向的演化;火山岩有由基性—中性—中酸性—酸性方向的演化;而碱度表现为由钙碱性向偏钾质碱性方向演化,这种既有岛弧型钙碱性岩浆演化系列又具有克拉通型富钾质碱性成分特点的双重性质,反映了远离太平洋板块俯冲带而靠近大陆内部的构造环境。
The Mesozoic magmatic activity in the southwestern Liaoning Province is characterized by a northerly zonal distribution in space, ie, the NE-trending volcanic-intrusive rock zone; it appears as a sequence in time, ie volcanic eruption-magmatic intrusive cycles; Source), which is the genetic type of crust-mantle mixed source. In the direction of magmatic differential evolution, it evolves in the direction of increasing acidity and alkalinity. The intrusive rocks have the evolution of neutral-acidic-acidic-super-acidic direction. The volcanic rocks have the evolution of basic-neutral-intermediate-acidic-acidic directions. Alkalinity is characterized by alkaline-alkaline facies Evolution of the existing island arc type of calc-alkaline magmatic evolution series with the characteristics of carat-type potassium-rich alkaline nature of the dual nature of the reflection of the Pacific plate subduction zone and close to the interior of the continental tectonic environment.