| 西秦岭北缘新阳—元龙韧性剪切带中花岗质糜棱岩黑云母40Ar 39Ar年龄及地质意义 |
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| 引用本文： | 丁仨平,裴先治,李勇,李瑞保,李佐臣,冯建赟,孙雨,张亚峰.西秦岭北缘新阳—元龙韧性剪切带中花岗质糜棱岩黑云母40Ar 39Ar年龄及地质意义[J].地质学报,2009,83(11):1624-1632. |
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| 作者姓名： | 丁仨平 裴先治 李勇 李瑞保 李佐臣 冯建赟 孙雨 张亚峰 |
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| 作者单位： | 长安大学西部矿产资源与地质工程教育部重点实验室,长安大学地球科学与资源学院,西安,710054 |
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| 基金项目： | 国家自然科学基金项目，教育部科学技术研究重点项目，中国地质调查局地质调查项目(编号 200013000154)资助的成果 |
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| 摘 要： | 西秦岭北缘新阳-元龙大型韧性剪切带是分划西秦岭造山带与祁连造山带的区域主构造边界,通过对其物质组成和构造特征的研究,结合两侧不同(洋-陆)构造环境下各类地质体的研究成果,重点对剪切带内花岗质糜棱岩中黑云母单矿物进行了~(40)Ar-~(39)Ar定年研究.在新阳镇和元龙北剪切带中分别获得(347.95±2.17)Ma (MSWD＝1.89)和(351.70±1.72)Ma (MSWD＝0.80)的坪年龄,分析确定其应为黑云母的冷却年龄,表明变形时代应在早石炭世早期之前;反映了最晚在早石炭世早期,该剪切带已横切秦岭与祁连造山带并发生强烈的右行走滑构造拼贴作用.
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| 关 键 词： | 韧性剪切带 花岗质糜棱岩 黑云母 ~(40)Ar-~(39)Ar定年 西秦岭北缘 |
| 收稿时间： | 2009/3/15 0:00:00 |
| 修稿时间： | 2009/8/15 0:00:00 |
Biotite ~(400Ar-~(39)Ar Ages of Granitic Mylonite at the Xinyang-Yuanlong Ductile Shear Zone in the North Margin of West Qinling and Their Geological Significance |
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| DING Saping,PEI Xianzhi,LI Yong,LI Ruibao,LI Zuochen,Feng Jianyun,SUN Yu,and ZHANG Yafeng.Biotite ~(400Ar-~(39)Ar Ages of Granitic Mylonite at the Xinyang-Yuanlong Ductile Shear Zone in the North Margin of West Qinling and Their Geological Significance[J].Acta Geologica Sinica,2009,83(11):1624-1632. |
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| Authors: | DING Saping PEI Xianzhi LI Yong LI Ruibao LI Zuochen Feng Jianyun SUN Yu and ZHANG Yafeng |
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| Abstract: | The Xinyang-Yuanlong ductile shear zone in the north margin of West Qinling is the main tectonic boundary which partitions the West Qinling orogenic belt from the Qilian Orogenic belt. Their material composition and tectonic characteristics were studied in this study combined with the study results of various blocks in different tectonic settings (ocean-continent) of both side. This study also focused on 40Ar-39Ar dating of the biotite from granitic mylonite in the shear zone and yielded plateau ages of 347... |
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| Keywords: | ductile shear zone granitic mylonite biotite ~(40)Ar-~(39)Ar dating the northern margin of West Qinling |
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