| 甘肃北山地区音凹峡多旋回裂谷带 |
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| 引用本文： | 刘明强,龚全胜.甘肃北山地区音凹峡多旋回裂谷带[J].甘肃地质学报,1999,8(2):15-22. |
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| 作者姓名： | 刘明强 龚全胜 |
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| 作者单位： | 甘肃省地勘局兰州地质矿产勘查院!甘肃兰州730000 |
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| 摘 要： | 甘肃北山地区音凹峡多旋回裂谷带的发展演化具有多阶段性、多旋回性和继承性特征，岩石化学、地球化学特征表明火山岩组合具明显的双峰式特征，并出现多旋回双峰式火山岩组合。裂谷带发展与构造运动关系密切，并具有从陆内裂谷向陆间裂谷演化的特征，其演化历史反映了与北山多旋回造山、陆内壳幔活动的相互耦合关系。
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| 关 键 词： | 甘肃北山 裂谷带 双峰式火山岩 多阶段性、多旋回性 |
YINWAXIA POLYCYCLIC RIFT ZONE IN BEISHAN AREA IN GANSU PROVINCE |
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| LIU Ming qiang,GONG Quan sheng,LIANG Ming hong.YINWAXIA POLYCYCLIC RIFT ZONE IN BEISHAN AREA IN GANSU PROVINCE[J].Acta Geologica Gansu,1999,8(2):15-22. |
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| Authors: | LIU Ming qiang GONG Quan sheng LIANG Ming hong |
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| Institution: | (Lanzhou Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730050,China) |
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| Abstract: | The development and evolution of the Yinwaxia polycyclic rift zone in Beishan area are of multistage,polycycle and inheriting characteristics.Petrochemistry and geochemistry indicate that the volcanic associations of the zone possess typical biomodal features and that polycyclic biomodal volcanic association exists.The rift zone developed closely related to tectonic movement,and evolved from intracontinental rift to intercontinental rift.The evolution history of the rift zone suggests its coupling relationship with polycyclic orogeny in Beishan area and intracontinental crust mattle activities. |
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| Keywords: | Beishan area in Gansu Province Rift zone Biomodal volcanics Multistage and polycycle |
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