| 张云云,李新发,刘博,王建民,马明,任柄璋,李利阳,谢志远,李鹏辉.内蒙古阿巴嘎旗宝力高庙组一段安加拉植物化石的发现及其对古亚洲洋闭合时间的指示意义[J].矿产勘查,2025,(1):27-33 |
| 内蒙古阿巴嘎旗宝力高庙组一段安加拉植物化石的发现及其对古亚洲洋闭合时间的指示意义 |
| Angara flora from the first member of Baoligaomiao Formation in Abagaqi, Inner Mongolia, China and its implication for timing of closure of the Paleo-Asian Ocean |
| 投稿时间：2024-05-15 |
| DOI：10.20008/j.kckc.202501003 |
| 中文关键词: 安加拉植物 宝力高庙组 晚石炭世 阿巴嘎旗 古亚洲洋 |
| 英文关键词: Angara flora Baoligaomaio Formation Late Carboniferous Abagaqi Paleo-Asian Ocean |
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| 中文摘要: |
| 位于兴蒙造山带东段的宝力高庙组对研究古亚洲洋闭合的时限具有重要意义。在内蒙古锡林郭勒盟 1∶5万区域地质调查中，笔者在宝力高庙组一段内发现了大量的植物化石，经鉴定主要为 Angaropteridium car. diopteroides (Schimp.) Zalessky、Noeggerathiopsis cf. theodori Tsohirkova et Zalessky、Noeggerathiopsis suban. gusta Zalessky、Noeggerathiopsis sp.、Zamiopteris sp.等，均系安加拉植物群的重要分子，时代为晚石炭世。此外，在该段地层内还发现少量海相双壳类:Sanguinolites sp.、Modiomorpha? sp.。结合二段角闪安山岩和三段流纹岩的锆石 U-Pb年龄分别为(320.1±5.7)Ma和(315.1±4.1)Ma的证据，进一步确定一段时代为晚石炭世，并从古生物学角度探讨了研究区古亚洲洋的闭合时间、分析了研究区晚石炭世古环境特征。 |
| 英文摘要: |
| The Baoligaomiao Formation, located in the eastern part of the Xingmeng orogenic belt, is of greatsignificance to study of the closure of the Paleo-Asian Ocean. During the 1∶50000 regional geological survey inXilingolaemu, Inner Mongolia, a large number of plant fossils were collected from the First Member of Baoligaomiaoformation, such as Angaropteridium cardiopteroides (Schimp.) Zalessky、Noeggerathiopsis cf. theodori Tsohirkovaet Zalessky、Noeggerathiopsis subangusta Zalessky、Noeggerathiopsis sp.、Zamiopteris sp., all of these fossils are impor.tant elements of the Late Carboniferous Angara flora. In addition, a small number of marine bivalves (such as San. guinolites sp. and Modiomorpha? sp.) were also yielded from this stratum. Based on the zircon U-Pb ages (320.1 ±5.7) Ma of amphibolite andesite from the Second Member and (315.1 ± 4.1) Ma of rhyolite from the Third Member, italso indicates the age of the First Member should be the Late Carboniferous. This discovery is of important signifi.cance to the paleogeography and the closure time of the Paleo-Asian Ocean in the study area. |
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