Volcanism during activity period of Beishan craton rift in Xinjiang, China
Volcanism during activity period of Beishan craton rift in Xinjiang, China
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发表时间：
2004
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通讯作者：
Wu De-chao
中科院分区：
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作者：
Wu De-chao
新疆北山构造带西部克拉通裂谷活动期火山活动频繁，火山活动强烈。火山岩在晚古生代地层中分布广泛，集中发育于上（下）石炭统、上石炭统和下二叠统。这些（火山）岩同时与普通沉积岩夹层。根据岩石地层学、火山岩层产状及其接触类型的研究，火山活动有四个旋回，其中包含九个火山喷发韵律。在研究区火山岩地质特征、岩石类型、石油化学和微量元素地球化学特征的基础上，探讨了其演化及形成环境。
The volcanic activities were frequent during the activity period of the craton rift in the Western Beishan Tectonic Belt, Xinjiang, and the volcanism was strong too. The volcanic rocks were distributed widely in the strata of the late Paleozoic Era and developed concentratively in the upper section of the (Lower) Carboniferous Series, the Upper Carboniferous Series and the Lower Permian Series. These (volcanic) rocks were interlayered with the normal sedimentary rocks in the same time. According to the study of the petrostratigraphy, occurrence of the volcanic rock beds and their types of contact, the (volcanism) has four cycles, and they contain nine rhythms of volcanic effusion. On the basis of studying the geological characteristics of the volcanic rocks, rock types, petrochemical and trace elements geochemical features in the study area, the authors discuss their evolution and formation environment.