| 内蒙古科右中旗扎木钦地区新民组地层的厘定及其地质意义 |
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| 引用本文： | 周国武,林敏,丘国春,王峰.内蒙古科右中旗扎木钦地区新民组地层的厘定及其地质意义[J].地质通报,2018,37(9):1579-1587. |
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| 作者姓名： | 周国武 林敏 丘国春 王峰 |
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| 作者单位： | 福建省地质调查研究院 |
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| 基金项目： | 中国地质调查局项目《1∶50000牛汾台林场、青石砬子、迈斯很达坂、海勒斯台护林站幅区域地质调查项目》（编号：DD20160048-06）、《1∶50000郭挠特乌拉、巴尔陶勒盖、索金达坂、乌苏伊和牧场幅区域地质调查项目》（编号：1212010881217） |
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| 摘 要： | 内蒙古科右中旗扎木钦地区新民组为内蒙古1∶5万郭挠特乌拉等4幅区域地质调查项目新厘定的地层单位。据岩性组合划分为上、下2个段,下段以中酸性火山碎屑岩为主夹火山碎屑沉积岩,角度不整合于林西组之上,上段主要为一套粗-细的碎屑岩组合,产双束松粉、冷杉粉、薄壁粉等早—中侏罗世微体古生物,上未见顶。LA-ICP-MS锆石U-Pb测年值分别为162.1±1.3Ma、154.4±2.3Ma,时代置于中侏罗世。
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| 关 键 词： | 新民组 锆石U-Pb年龄 中侏罗世 扎木钦地区 |
| 收稿时间： | 2018/3/20 0:00:00 |
| 修稿时间： | 2018/6/27 0:00:00 |
The redefinition of Xinmin Formation in Zhamuqin area of Horqin Right Wing Mid-dle Banner of Inner Mongolia and its geological significance |
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| ZHOU Guowu,LIN Min,QIU Guochun and WANG Feng.The redefinition of Xinmin Formation in Zhamuqin area of Horqin Right Wing Mid-dle Banner of Inner Mongolia and its geological significance[J].Geologcal Bulletin OF China,2018,37(9):1579-1587. |
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| Authors: | ZHOU Guowu LIN Min QIU Guochun and WANG Feng |
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| Institution: | Fujian Institute of Geological Survey, Fuzhou 350013, Fujian, China,Fujian Institute of Geological Survey, Fuzhou 350013, Fujian, China,Fujian Institute of Geological Survey, Fuzhou 350013, Fujian, China and Fujian Institute of Geological Survey, Fuzhou 350013, Fujian, China |
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| Abstract: | The Xinmin Formation in Zhamuqin area of Horqin Right Wing Middle Banner of Inner Mongolia were redefined by In-ner Mongolia 1:50000 regional survey of four sheets such as Guonaotewula. According to lithologic combination, Xinmin Forma-tion is divided into two lithogic sections:intermediate-acid pyroclastic rock is dominated by a small amount of pyroclastic rocks formed in lower segment overlying Linxi Formation with angular unconformity, whereas the upper part is a thick and thin clastic as-semblage, which contains Pinuspollenites, Abiespollenites, Perinopollenites and some other Early-Middle Jurassic micropaleontolog-ic fossils, with no top observed. LA-ICP-MS zircon U-Pb ages are 162.1±1.3Ma and 154.4±2.3Ma, suggesting Middle Jurassic. |
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| Keywords: | Xinmin Formation zircon U-Pb age Middle Jurassic Zhamuqin area |
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