| 新疆吾拉斯台一带下二叠统乌郎组火山岩地球化学特征 |
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| 引用本文： | 潘明臣,于海峰,梁有为,王福君,王粉丽,丁伟,李艳,李红梅,赵丽君,徐桂岩.新疆吾拉斯台一带下二叠统乌郎组火山岩地球化学特征[J].地质与资源,2011,20(6):452-457. |
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| 作者姓名： | 潘明臣 于海峰 梁有为 王福君 王粉丽 丁伟 李艳 李红梅 赵丽君 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： | 新疆尼勒克县吾拉斯台一带1：5万区域地质矿产调查项目（XJQDZ2007-07）资助.参加本项目工作的成员还有郭洪方等.岩石地球化学引用了部分新疆第九地质大队《新疆尼勒克县胡吉尔台一带1：5万区域地质矿产调查》项目数据.在此一并表示感谢. |
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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-伊塞克湖微板块(Ⅱ级)阿吾拉勒晚古生代裂谷系(Ⅲ级)中,为一套陆相的火山岩和碎屑岩组合.吾拉斯台一带火山活动较强,火山堆积厚度巨大,区内厚近4000m,属乌郎组中上部层位.火山岩主要由偏碱性的基性和酸性岩组成,总体以双峰式火山岩为特征.岩石地球化学所反映的构造环境为...
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| 关 键 词： | 乌郎组 下二叠统 双峰式火山岩 地球化学 新疆 |
| 收稿时间： | 2011-08-30 |
GEOCHEMISTRY OF VOLCANIC ROCKS OF THE LOWER PERMIAN WULANG FORMATION IN WULASITAI AREA, XINJIANG |
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| PAN Ming-chen
,
YU Hai-feng
,
LIANG You-wei
,
WANG Fu-jun
,
WANG Fen-li
,
DING Wei
,
LI Yan
,
LI Hong-mei
,
ZHAO Li-jun
,
XU Gui-yan.GEOCHEMISTRY OF VOLCANIC ROCKS OF THE LOWER PERMIAN WULANG FORMATION IN WULASITAI AREA, XINJIANG[J].Geology and Resources,2011,20(6):452-457. |
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| Authors: | PAN Ming-chen YU Hai-feng LIANG You-wei WANG Fu-jun WANG Fen-li DING Wei LI Yan LI Hong-mei ZHAO Li-jun XU Gui-yan |
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| Institution: | Liaoning Institute of Geological Survey, Dalian 116100, Liaoning Province, China |
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| Abstract: | The volcanic rock of Lower Permian Wulang formation, distributed in the Late Paleozoic Awulale rift of IliYisaikehu micro-plate, Kazakhstan-Junggar plate, is the assemblage of continental volcanic rocks and detrital rocks. Intense volcanic activities in the area left thick volcanic accumulation up to 4000m, which belongs to the middle and upper layers of Wulang formation. The volcanic rocks are dominated by alkali-basic rocks and acidic rocks, characterized by bimodal. Lithogeochemistry shows a tectonic environment of intraplate basalt and continental rift basalt, which is in accordance with its tectonic location. The trachybasalt in the top layer is dated as Early Permian, with 207pb/206pb isotopic age of the 285±30 Ma. It is suggested that the volcanic activities of the Late Paleozoic Awulale rift tended to end in Early Permian. Then continental molasse was cumulated in Late Permian, marking the start of stable developing period of intracontinental basin. |
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| Keywords: | Wulang formation Lower Permian bimodal volcanic rocks geochemistry Xinjiang |
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