| 甘肃天水地区丹凤群变质火山岩地质地球化学特征及其构造环境研究 |
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| 引用本文： | 梁自兴.甘肃天水地区丹凤群变质火山岩地质地球化学特征及其构造环境研究[J].甘肃地质学报,1994,3(1):71-78. |
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| 作者姓名： | 梁自兴 |
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| 作者单位： | 甘肃省地矿局地质一队 |
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| 摘 要： | 丹凤群是分布在北奏岭南侧重要的早古生代地层。其火山岩以基性玄武岩为主，另有部分中性安山岩及少量酸性流纹岩。岩石组合、岩石化学及地球化学特征指示其为早古生代不成熟的初始岛弧环境。
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| 关 键 词： | 天水地区 丹凤群 初始岛弧 |
THE FEATURE OF GEOLOGY AND GEOCHEMISTRY AND IT TECTONIC SETTING OF THE DANFENG GROUP METAVOLCANITE IN TIANSHUI REGION GANSU PROVINCE |
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| Liang Zixing.THE FEATURE OF GEOLOGY AND GEOCHEMISTRY AND IT TECTONIC SETTING OF THE DANFENG GROUP METAVOLCANITE IN TIANSHUI REGION GANSU PROVINCE[J].Acta Geologica Gansu,1994,3(1):71-78. |
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| Authors: | Liang Zixing |
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| Institution: | Liang Zixing(No.1 GeologicaI Team,Geology and Mineral Resources Bureau of Gansu Province Tianshui 741020) |
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| Abstract: | The Danfeng Group metavolcanite,a early Paleozoic stratigraphic unit,extend more than200km to take the shape of a narrow belts in E-W direction along the Qinling orogenic beltin Tianshui region. The Danfeng Group volcanic rock mainly consists of basalt and some ofthem are andesite,rhyolite. The major and trace elements abundance and the REE patterns ofthe Danfeng Group basalts show a tectonic setting of primitive island-arc. |
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| Keywords: | Tianshui region Danfeng Group Primitive island-arc |
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