| 祁连山西段当金山一带原巴龙贡噶儿组的重新厘定及其构造意义 |
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| 引用本文： | 王军,孙新春,李小强,梁明宏,王玉玺,任文秀.祁连山西段当金山一带原巴龙贡噶儿组的重新厘定及其构造意义[J].地质通报,2019,38(7):1116-1126. |
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| 作者姓名： | 王军 孙新春 李小强 梁明宏 王玉玺 任文秀 |
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| 作者单位： | 甘肃省地质调查院, 甘肃 兰州 730000;兰州大学资源环境学院西部环境教育部重点实验室, 甘肃 兰州 730000,甘肃省地质调查院, 甘肃 兰州 730000,甘肃省地质调查院, 甘肃 兰州 730000,甘肃省地质调查院, 甘肃 兰州 730000,甘肃省地质调查院, 甘肃 兰州 730000;兰州大学地质科学与矿产资源学院甘肃省西部矿产资源重点实验室, 甘肃 兰州 730000,甘肃省地质调查院, 甘肃 兰州 730000 |
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| 基金项目： | 中国地质调查局项目《祁连成矿带肃南—大柴旦地区地质矿产调查》（编号：DD20160012） |
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| 摘 要： | 巴龙贡噶尔组是广泛分布于南祁连地区的古生代地层,通过区域地层对比研究,将祁连山西段当金山一带原巴龙贡噶尔组中的变质岩系厘定命名为拐杖山岩群(Pt_(2-3)G.),LA-ICP-MS锆石U-Pb年龄显示该地层形成于1662.8±5.7~962.9±4.4Ma的中新元古代。区域构造分析认为,南祁连地区前寒武纪变质基底岩石很可能是古老的柴达木地块的基底组分,是南祁连向南逆冲推覆于柴达木地块上的大型构造窗。
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| 关 键 词： | 祁连山西段 巴龙贡噶尔组 拐杖山岩群 逆冲推覆 构造窗 |
| 收稿时间： | 2017/5/15 0:00:00 |
| 修稿时间： | 2017/6/27 0:00:00 |
Recognition and tectonic significance of previously named Balonggongge'er Formation in West Qilian Mountain |
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| WANG Jun,SUN Xinchun,LI Xiaoqing,LIANG Minghong,WANG Yuxi and REN Wenxiu.Recognition and tectonic significance of previously named Balonggongge'er Formation in West Qilian Mountain[J].Geologcal Bulletin OF China,2019,38(7):1116-1126. |
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| Authors: | WANG Jun SUN Xinchun LI Xiaoqing LIANG Minghong WANG Yuxi and REN Wenxiu |
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| Institution: | Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China;Key Laboratory of Western China''s Environmental Systems, Ministry of Education/College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, Gansu, China,Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China,Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China,Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China,Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China;Key Laboratory of Mineral Resources in Western China(Gansu Province), School of Earth Sciences, Lanzhou University, Lanzhou 730000, Gansu, China and Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China |
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| Abstract: | Balonggongge''er Formation is a Paleozoic stratigraphic unit distributed in southern Qilian Mountain. The authors disintegrated a typical schist unit in Balonggongge''er Formation which is located in West Qilian Mountain and named Guaizhangshan Complex-Group. LA-ICP-MS zircon U-Pb geochronology reveals 3 age spans, i.e., 2540±5Ma, 1662.8±5.7Ma and 962.9±4.4Ma respectively. Regional structural analysis shows that the Precambrian metamorphic basement rocks in southern Qilian Mountain was probably the basal components of ancient Qaidam massif, and was the tectonic window of Qaidam massif which was thrust southward and lay over southern Qilian Mountain through napping. |
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| Keywords: | West Qilian Mountain Balonggongge''er Formation Guaizhangshan Complex-Group thrust-nappe structures tectonic window |
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