王之晟, 高天栋, 王洪志, 郭恒飞, 马振宇, 于兵
| [an error occurred while processing this directive] | 世界地质 2024, 43(1) 1-18 DOI: ISSN: 1004-5589 CN: 22-1111/P | |
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| 基础地质 | ||
| 大兴安岭阿尔山地区宝力高庙组浅变质岩年代学、地球化学特征及原岩建造探讨 | ||
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王之晟, 高天栋, 王洪志, 郭恒飞, 马振宇, 于兵 | ||
| 核工业二四三大队, 内蒙古 赤峰 024000 | ||
| 摘要： 大兴安岭阿尔山地区宝力高庙组为一套以沉积碎屑岩? 安山岩为主的陆相沉积??火山岩系, 经 历了区域变质作用后转变为低绿片岩相? 笔者对宝力高庙组浅变质岩开展了锆石 U--Pb 定年? 地球化 学的研究, 结合岩性岩相学和变质变形特征, 试图恢复其原岩建造, 并在此基础上, 探讨了沉积背 景? 结果表明, 阿尔山地区变质安山岩 LA??ICP??MS 锆石 U--Pb 年龄为 (312. 1 ± 1. 2) Ma, 地质时代 属晚石炭世—早二叠世, 将其厘定为宝力高庙组, 原岩组合属典型的滨湖相陆源中酸性火山??沉积建 造, 沉积构造环境为活动大陆边缘的弧内盆地, 与区域上二连—贺根山蛇绿—增生杂岩带晚石炭世— 早二叠世时期的构造环境一致? | ||
| 关键词： 宝力高庙组 font-family: 等线;">宝力高庙组; font-family: E-B6, serif;">;锆石 font-family: 等线;">锆石U- font-family: FZKTK--GBK1-0, serif;">U-- font-family: "MS Gothic";">-Pb font-family: E-BZ, serif;">Pb定年 font-family: 等线;">定年; font-family: E-B6, serif;">;原岩建造 font-family: 等线;">原岩建造; font-family: E-B6, serif;">;弧内盆地 font-family: 等线;">弧内盆地; font-family: E-B6, serif;">;阿尔山地区zz')" href="#"> font-family: 等线;">阿尔山地区 | ||
| Chronology, geochemical characteristics and protolith formation of low?grade metamorphic rocks from Baoligaomiao Formation in Aershan area, Da Hinggan Ling (Mts. ) | ||
| WANG Zhisheng, GAO Tiandong, WANG Hongzhi, GUO Hengfei, MA Zhenyu, YU Bing | ||
| Geological Party No. 243, CNNC, Chifeng 024000, Inner Mongolia, China | ||
| Abstract: The Baoligaomiao Formation, located in the Arshan area of the Da Hinggan Ling (Mts. ), compri? ses a continental sedimentary?volcanic rock series, predominantly formed of sedimentary clastic rocks and andes? ites, which have undergone regional metamorphism and have been converted into the low greenschist facies. This study focuses on the zircon U??Pb dating and geochemical analysis of the low?grade metamorphic rocks of Baoligao? miaoFormation. By integrating lithologic petrographosed and metamorphic deformation characteristics, the research aims to reconstruct the protolith structure and explore the sedimentary setting. The results indicate that the LA?? ICP??MS zircon U??Pb age of the metamorphic andesites in the Arshan area is approximately (312. 1 ± 1. 2) Ma, belonging to the Late Carboniferous and Early Permian periods, and it is identified as part of Baoligaomiao Forma? tion. The protolith assemblage of Baoligaomiao Formation in the Arshan area is a typical terrigenous intermediate? acidic volcano?sedimentary lacustrine facies. The sedimentary tectonic environment is the intra?arc basin of the ac? tive continental margin, which is consistent with the tectonic environment of the Late Carboniferous??Early Permianin Erlian ??Hegenshan ophiolite?accretionary complex. | ||
| Keywords: Baoligaomiao Formationzz')" href="#"> Baoligaomiao Formation ??Pb datingzz')" href="#"> zircon U??Pb dating protolith formation ?arc basinzz')" href="#"> intra?arc basin Aershan area | ||
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