| 西准噶尔阿克巴斯陶岩体三维形态及其地质意义 |
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| 引用本文： | 张攀,王国灿,肖龙,张胜业,周佩,张云,沈青强.西准噶尔阿克巴斯陶岩体三维形态及其地质意义[J].地球科学,2015,40(6):941-952. |
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| 作者姓名： | 张攀 王国灿 肖龙 张胜业 周佩 张云 沈青强 |
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| 作者单位： | 1.中国地质大学全球大地构造研究中心，地球科学学院，湖北武汉 430074 |
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| 基金项目： | 中国地质调查局项目(No．1212011220245)；新疆1∶25万铁厂沟镇幅、克拉玛依市幅区调修测(No．1212011120502)． |
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| 摘 要： | 西准噶尔地区广泛发育晚石炭世-二叠纪不同规模、形态各异的花岗岩体，阿克巴斯陶岩体是其中最具代表性岩体之一，但对于该岩体三维形态和侵位过程的研究尤显薄弱.基于详细的野外路线地质调查，通过对阿克巴斯陶岩体NE、NW、SE和SW侧接触边界产状、接触热变质带宽度、岩脉方位和发育程度、顶垂体和围岩捕虏体发育特征的研究，揭示出岩体NE、SE和SW侧与围岩呈低角度外倾接触，而岩体NW侧与围岩呈高角度接触.在此基础上，结合岩体出露区音频大地电磁反演结果，揭示出阿克巴斯陶岩体三维形态总体为不对称蘑菇状，岩体侵位时岩浆主要由NW向朝SE向斜向侵位，并建立了岩体的三维形态模型.阿克巴斯陶岩体三维形态的确定，揭示了西准噶尔地区晚石炭世晚期-早二叠世为后造山伸展环境.
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| 关 键 词： | 阿克巴斯陶岩体 三维形态 地球化学 构造 |
| 收稿时间： | 2014-08-22 |
Three-Dimensional Configuration Analysis and Its Geological Significance of Akebasitao Pluton in West Junggar |
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| Zhang Pan,Wang Guocan,Xiao Long,Zhang Shengye,Zhou Pei,Zhang Yun,Shen Qingqiang.Three-Dimensional Configuration Analysis and Its Geological Significance of Akebasitao Pluton in West Junggar[J].Earth Science-Journal of China University of Geosciences,2015,40(6):941-952. |
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| Authors: | Zhang Pan Wang Guocan Xiao Long Zhang Shengye Zhou Pei Zhang Yun Shen Qingqiang |
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| Abstract: | Late Carboniferous-Early Permian post-collision plutons are extensively distributed throughout the West Junggar, Xinjiang, China, of which the Akebasitao pluton is the most distinguished one. However, investigations on the three-dimensional configuration and emplacement mechanism of the pluton remain relatively insufficient. A multidisciplinary approach, including field structure and audio magnetotelluric sounding, has been adopted for study on the Akebasitao pluton. The geological features and the audio magnetotelluric sounding exploration suggest that the pluton, with an asymmetrical mushroom-shape and slightly oblique movement of magma from NW to SE, formed in the post-orogenic extensional environment.What is more, the three-dimensional configuartion of the pluton reveals that the West Junggar was of post-orogenic extensional environment in the Late Carboniferous to Early Permian. This study has important implication for three-dimensional shape of those post-collision plutons that are widely developped in West Junggar. |
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| Keywords: | akebasitao pluton three-dimensional configuration geochemistry tectonics |
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