| 北祁连造山带东段上奥陶统一下、中泥盆统砂岩碎屑组分与物源分析 |
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| 引用本文： | 徐亚军,杜远生,杨江海,文运强,王建奎.北祁连造山带东段上奥陶统一下、中泥盆统砂岩碎屑组分与物源分析[J].地质科技情报,2011,30(2):28-33. |
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| 作者姓名： | 徐亚军 杜远生 杨江海 文运强 王建奎 |
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| 作者单位： | 中国地质大学地球科学学院,武汉,430074 |
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| 摘 要： | 北祁连造山带东部武威斜豪-古浪石城子-靖远水泉-带上奥陶统一下、中泥盆统砂岩碎屑组分源区大地构造背景的判别结果表明,上奥陶统砂岩中的沉积物主要来自弧造山带内的过渡岛弧源区,并且早期可能含有较多的来自未分割岛弧源区的物质,下志留统砂岩中的沉积物主要来自碰撞造山带,而下、中泥盆统砂岩中的沉积物主要来自卷入碰撞造山带内的分割...
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| 关 键 词： | 砂岩 物源分析 北祁连造山带 "点碰撞" |
Detrital Composition and Provenance of Sandstones from the Upper Ordovician to Lower-Middle Devonian,the Eastern Part of North Qilian Orogenic Belt |
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| XU Ya-jun,DU Yuan-sheng,YANG Jiang-hai,WEN Yun-qiang,WANG Jian-kui.Detrital Composition and Provenance of Sandstones from the Upper Ordovician to Lower-Middle Devonian,the Eastern Part of North Qilian Orogenic Belt[J].Geological Science and Technology Information,2011,30(2):28-33. |
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| Authors: | XU Ya-jun DU Yuan-sheng YANG Jiang-hai WEN Yun-qiang WANG Jian-kui |
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| Institution: | XU Ya-jun,DU Yuan-sheng,YANG Jiang-hai,WEN Yun-qiang,WANG Jian-kui(Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China) |
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| Abstract: | The tectonic settings of sandstone sources from the Upper Ordovician to Lower-Middle Devonian were discriminated by the detrital model.The sediments in the Upper Ordovician were derived from the transitional arc,with the earlier undissected arc.The detrital grains in the Lower Silurian mainly came from the collisional orogen.The sediments in the Lower-Middle Devonian were mainly derived from the dissected arc,subducted complex and continent engulfed in the orogen.The nature of the arc,as the source,develope... |
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| Keywords: | sandstone provenance North Qilian Orogenic Belt spot collision |
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