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首页> 外文会议>International Conference on Energy and Environmental Protection >Geochemical Characteristics and Genesis for Volcanic Rocks of Yixian Formation in Western Liaoning Province
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Geochemical Characteristics and Genesis for Volcanic Rocks of Yixian Formation in Western Liaoning Province

机译：辽西义县义县形成火山岩地球化学特征及成因

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Volcanic rocks of Yixian Formation were widely distributed in western Liaoning. The Yixian volcanic cycle of early Cretaceous in the Chaoyang basin can be divided into two subcycles. The first subcycle is composed of basalt, basalt andesite and andesite. The second subcycle is composed of trachyandensite and trachyte. The volcanic rocks are characterized by high SiO_2, Al_2O_3, K_2O and Na_2O, and comparatively low Ti0_2 components. The volcanic rocks arc obviously enriched in incompatible elements, and depleted in compatible elements. The ZREE of volcanic rocks is high and rich in LREE. The spider patterns are the right-incline, there is a slight low Eu negative abnormality and low Ce negative abnormality. The characteristics show that volcanic rocks of Yixian Formation belong to the high-K calc-alkaline magmatic serious. Comprehensive study shows that the volcanic rocks of Yixian Formation were generated in response to lithosphere extension in the continent intraplate orogenic belt.
机译：宜县形成的火山岩广泛分布于辽西西部。 朝阳盆地早期白垩纪的义县火山循环可分为两个亚单次。 第一次次循环由玄武岩，玄武岩和岩石和安德莱特组成。 第二个子循环由Trachyensite和Trachyte组成。 火山岩的特征在于高SiO_2，AL_2O_3，K_2O和NA_2O，以及相对较低的TIO_2组件。 火山岩岩石明显富集在不相容的元素中，并以兼容的元素耗尽。 火山岩的Zree在LREE高且丰富。 蜘蛛图案是右倾斜的，有轻微的低欧盟阴性异常和低CE阴性异常。 该特征表明，宜杉地层的火山岩属于高k钙碱岩浆严重。 综合研究表明，宜兴地层的火山岩响应于岩石圈的岩石岩眶带中的岩石圈延伸产生。

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