| 甘肃省武都区月照—琵琶一带青白口纪火山岩地球化学特征及构造环境 |
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| 引用本文： | 李鸿睿,马 涛,胡积球.甘肃省武都区月照—琵琶一带青白口纪火山岩地球化学特征及构造环境[J].甘肃地质学报,2011(3):18-22. |
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| 作者姓名： | 李鸿睿 马 涛 胡积球 |
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| 作者单位： | 甘肃省地矿局第三地勘院,甘肃兰州730050 |
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| 摘 要： | 对出露于甘肃省武都区月照—琵琶一带火山岩的研究表明,该套火山岩以基性端元和酸性端元为主,缺失中性岩石端元,为典型的双峰式火山岩。时代为青白口纪,产出的构造环境为洋岛,不代表勉略蛇绿混杂岩的组成部分。该套双峰式火山岩的厘定,对西秦岭造山带的构造演化具有重要意义。
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| 关 键 词： | 双峰式火山岩 地球化学 构造意义 甘肃武都 |
Geochemistry of the Yuezhao-Pipa Qingbaikouji Volcanic Rocks and Tectonic Circumstances in Wudu District, Gansu Province |
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| LI Hong-rui,MA Tao and HU Ji-qiu.Geochemistry of the Yuezhao-Pipa Qingbaikouji Volcanic Rocks and Tectonic Circumstances in Wudu District, Gansu Province[J].Acta Geologica Gansu,2011(3):18-22. |
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| Authors: | LI Hong-rui MA Tao and HU Ji-qiu |
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| Institution: | (No.3 Geology and Mineral Exploration Team,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730050,China) |
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| Abstract: | The study on the Yuezhao-Pipa volcanic rocks in Wudu district of Gansu province shows that the volcanic rocks formed in the tectonic setting of oceanic island in Qingbaikouji.They were mainly basic-and acid-endmember missing neutral-endmember rocks,belonged to typical bimodal volcanic rocks and were not a part of Ophiolite.The determination of this set of bimodal volcanic rocks has an important significance to the tectonic evolution of the West Qinling orogenic belt. |
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| Keywords: | bimodal volcanic rocks geochemistry tectonic significance Wudu Gansu |
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