| 新疆博乐地区下二叠统乌郎组火山岩特征与构造环境分析 |
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| 引用本文： | 潘明臣,于海峰,王福君,梁有为,丁伟,李艳,徐桂岩.新疆博乐地区下二叠统乌郎组火山岩特征与构造环境分析[J].地质与资源,2011,20(3):226-230. |
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| 作者姓名： | 潘明臣 于海峰 王福君 梁有为 丁伟 李艳 徐桂岩 |
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| 作者单位： | 辽宁省地质勘查院, 辽宁 大连 116100 |
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| 基金项目： | 新疆博乐市阿拉山口西一带1∶5万区域地质矿产调查项目(XJQDZ2008-04)资助 |
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| 摘 要： | 乌郎组火山岩分布于哈萨克斯坦-准噶尔板块（Ⅰ级）伊犁微板块（Ⅱ级）阿拉套晚古生代陆缘盆地（Ⅲ级）与准噶尔微板块（Ⅱ级）接壤带附近.火山活动相对较弱，火山岩浆从基性-中性-酸性均有活动.区内碱玄岩为板内玄武岩，安山岩及流纹岩为陆内碰撞造山带环境形成.乌郎组碱玄岩的碱度为强碱性；安山岩、流纹岩、流纹斑岩的碱度为亚碱性.中性安山岩铷锶等时线同位素年龄为282.5±2.6 Ma，时代为早二叠世.由此推断，阿拉山口地区伊犁微板块与准噶尔微板块在早二叠世时就已经缝合，形成陆内断陷盆地，并发育陆相火山岩-碎屑岩建造.
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| 关 键 词： | 下二叠统 火山岩 地球化学 构造环境 阿拉山口 新疆 |
| 收稿时间： | 2010-06-07 |
CHARACTERISTICS AND TECTONIC SETTING OF THE PERMIAN VOLCANIC ROCKS IN BOLE AREA,XINJIANG |
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| PAN Ming-chen,YU Hai-feng,WANG Fu-jun,LIANG You-wei,DING Wei,LI Yan,XU Gui-yan.CHARACTERISTICS AND TECTONIC SETTING OF THE PERMIAN VOLCANIC ROCKS IN BOLE AREA,XINJIANG[J].Geology and Resources,2011,20(3):226-230. |
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| Authors: | PAN Ming-chen YU Hai-feng WANG Fu-jun LIANG You-wei DING Wei LI Yan XU Gui-yan |
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| Affiliation: | Liaoning Institute of Geological Survey, Dalian 116100, Liaoning Province, China |
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| Abstract: | The volcanic rocks of Wulang formation are scattered in the Late Paleozoic Alataw continental marginal basin near the contact between Ili micro-plate and Junggar micro-plate of the Kazakhstan-Junggar plate.The volcanic activities are relatively weak,with basic,intermediate and acid magma.The tectonic environment of the tephrite in the area is intraplate;while that of the andesite and rhyolite is intracontinental collision orogenic belt.The alkalinity of the tephrite of Wulang formation is strong.The andesit... |
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| Keywords: | Lower Permian volcanic rock geochemistry tectonic environment Alataw area Xinjiang |
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