| 河南云台山世界地质公园百家岩景区中元古界砂岩沉积相特征与沉积环境分析 |
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| 引用本文：赵汀,李兵,吴珍汉,高林志,马寅生,吴中海,刘超,梁飞.2022.河南云台山世界地质公园百家岩景区中元古界砂岩沉积相特征与沉积环境分析[J].地球学报,43(2):246-254. |
| DOI：10.3975/cagsb.2021.070901 |
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| 基金项目:河南焦作市科研项目“云台山地貌地学特征及评价指标体系研究”(编号: M1407);中国地质调查局项目“典型地质景观形成条件研究”(编号: 1212010611810) |
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| 中文摘要:云台山联合国教科文组织世界地质公园是南太行地区层状峡谷地貌的典型代表。园区内发育一套中元古界云梦山组紫色石英砂岩, 是地质公园典型代表性景观地层, 在太行山地区广泛分布, 被称作“太行山红层”, 美学价值极高。其中发育大量的交错层理, 波痕、干裂等层面沉积构造, 在野外观察和区域地质资料分析基础上, 通过对百家岩地质剖面重点剖析, 采集不同层位的岩石样品, 进行化学分析、薄片分析、沉积相特征分析研究。在此基础上对云梦山组沉积环境进行了探讨, 结果表明: 百家岩景区云梦山组紫色石英砂岩形成于滨海海滩-潮坪沉积环境, 部分沉积特征具有三角洲相特点, 波浪对砂的来回冲洗, 磨圆度较好, 石英砂岩质地较纯, 成分和结构成熟度较高, 整体处于频繁动荡整体抬升的状态。该研究不仅对揭示云台山地区中元古代古地理环境、演化历史提供了重要资料, 并有助于提高公园科普教育功能, 增加公众对地质学科的兴趣和爱好, 从而带动焦作地区经济社会的转型和发展具有重要意义。 |
| 中文关键词:地质公园 云台山 太行山红层 石英砂岩 地质遗迹 |
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| An Analysis of Sedimentary Facies and Sedimentary Environment of Mesoproterozoic Sandstone in the Baijiayan Area of Yuntaishan UNESCO Global Geopark, Henan |
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| Abstract:The Yuntaishan UNESCO Global Geopark in Henan Province is a typical representative of layered canyon landforms in the South Taihang area. A set of purple quartz sandstones of the Yunmengshan Formation in the Mesoproterozoic developed in the Geopark constitute the major typical representative landscape-building strata, which are widely distributed in the Taihang area, named “red beds in Taihang Mountain”. The aesthetic value is extremely high, and in the beds, a large number of cross bedding, ripple marks, and mud-crack sedimentary structures are developed. Based on field observations and regional geological data analysis, the authors focused the study on the Baijiayan profile. Rock sampling in different locations, element analysis, thin slice analysis, and sedimentary facies analysis were carried out. Based on these items of evidence, the authors investigated the sedimentary environment of the Yunmengshan Formation. The results show that the purple quartz sandstone of Yunmengshan Formation in the Baijiayan area was formed in a coastal beach-tidal flat sedimentary environment. The Yuntai Mountain was in a state of frequent turbulence and overall uplift during the Mesoproterozoic period. This research not only provides important information for revealing the Mesoproterozoic paleogeographic environment and evolution history of the Yuntai Mountain area, but also helps to improve the science education function of the Geopark and increase public interest and hobbies in geological sciences. In the other hand, these researches will benefit the economic and social transformation of Jiaozuo area. |
| keywords:geoparks Yuntai Mountain red beds in Taihang Mountain quartz sandstone geoheritage |
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