| 北祁连西段早古生代构造演化史 |
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| 引用本文： | 左国朝,毛景文.北祁连西段早古生代构造演化史[J].甘肃地质学报,1999,8(1):6-13. |
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| 作者姓名： | 左国朝 毛景文 |
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| 作者单位： | [1]甘肃地勘局地质研究所 [2]中国地矿部地质研究所 |
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| 摘 要： | 北祁连西段与北祁连中段构造带之间被一条平行于阿尔金断裂带的宗宾大坂古转换断裂所隔，东西两段在早古生代构造演化史上有明显差异。北祁连西段早古生代构造是在前震旦系陆壳基底上，在震旦纪再一次开裂演变为裂陷槽，寒武—奥陶纪为裂谷—海沟—火山弧多元构造的格局
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| 关 键 词： | 北祁连西段 早古生代 裂谷 海沟 火山弧 |
STRUCTURAL EVOLUTION OF EARLY PALEOZOIC TECTONIC BELT IN THE WEST SECTION
OF NORTHERN QILIAN AREA |
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| Zuo Guochao,Wu Maobing,Mao Jingwen,Zhang Zhaochong.STRUCTURAL EVOLUTION OF EARLY PALEOZOIC TECTONIC BELT IN THE WEST SECTION
OF NORTHERN QILIAN AREA[J].Acta Geologica Gansu,1999,8(1):6-13. |
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| Authors: | Zuo Guochao Wu Maobing Mao Jingwen Zhang Zhaochong |
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| Institution: | Zuo Guochao ① Wu Maobing ① Mao Jingwen ② Zhang Zhaochong ② (①Institute of Geoscience,Gansu Bureau of Geology and Mineral Exploration and Development,Lanzhou 730000,China) (②Institute of Geology,Ministry of Geology and Mineral Reso |
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| Abstract: | The west section tectonic belt
and the midsection tectonic belt of Northern Qilian area are segregated by zongbindaban fossil
transform fault zone which runs parallel with Aerjin fault zone,and the tectonic evolution history
of the two belts are distinctly different during Early Paleozoic era.For the west section tectonic
belt,it was overlaying on the Presinian continental crust basement which was cleaved and
evoluted into rift depression trench during Sinian period;and during Cambrian-Ordovician
period,a multi-tectonic pattern of rift-submarine trench-volcanic arc was formed. |
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| Keywords: | West section of Northern Qilian area Early paleozoic era Rift Submarine trench Volcanic arc |
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