| 北祁连西段祁青构造混杂岩中的单颗粒锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 王建军.北祁连西段祁青构造混杂岩中的单颗粒锆石U-Pb年龄及其地质意义[J].甘肃地质学报,2014,23(3):9-14. |
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| 作者姓名： | 王建军 |
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| 作者单位： | 甘肃省地质调查院; |
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| 基金项目： | 北祁连西段三岔口等6幅1∶5万区域地质调查项目部分成果 |
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| 摘 要： | 在北祁连西段三岔口等6幅1∶5万区域地质调查中,对祁青构造混杂岩进行了调查研究,通过LA-ICPMS法单颗粒锆石U-Pb同位素测年,获得206Pb/238U表面加权平均年龄494±15Ma,相当于中寒武世,故将该混杂岩解体,部分归为中寒武世黑刺沟组。
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| 关 键 词： | 北祁连西段 祁青构造混杂岩 单颗粒锆石U-Pb年龄 中寒武世黑刺沟组 |
U-Pb DATING FOR SINGLE-GRINE ZIRCON OF QIQING TECTONIC MELANGE BELT IN THE WEST SECTOR OF NORTHERN QILIAN |
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| WANG Jian-jun.U-Pb DATING FOR SINGLE-GRINE ZIRCON OF QIQING TECTONIC MELANGE BELT IN THE WEST SECTOR OF NORTHERN QILIAN[J].Acta Geologica Gansu,2014,23(3):9-14. |
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| Authors: | WANG Jian-jun |
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| Institution: | WANG Jian-jun (Geological Survey of Gansu Province, Lanzhou 730000, China) |
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| Abstract: | Petrological and geochemical characteristics as well as formation ages of the Qiqing tectonic melange belt were investigated during the regional geological survey（scale 1：50000） in Sanchakou 6 maps etc, the west sector of the northern Qilian Mountains. By LA-ICPMS isotopic age determination, getting the average age of206 Pb /238 U surface weighted 494 ±15Ma, equivalent to the Middle Cambrian. So will the Qiqing tectonic melange belt disintegration, part to Middle Cambrian Heicigou group. |
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| Keywords: | the west sector of northern Qilian Mountain Qiqing tectonic melange belt single-grain zircon U-Pb dating Heicigou Group |
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