平朔矿区黏土矿物特征及其对古气候环境的响应Characteristics of Clay Minerals in Pingshuo Mining Area and its Effects on Paleoclimate and Paleoenvironment
马延庆,李国勇,韩璐,关继超,赵飞,王泽唐,王超勇
摘要(Abstract)：
选取平朔矿区石炭纪—二叠纪地层为研究对象，通过采集14个泥岩、砂岩、页岩等各类岩样，进行了XRD和XRF测试分析，揭示平朔矿区的黏土矿物组成及古气候演化特征。结果表明，从海相本溪组到海陆过渡相太原组，演化到陆相上石盒子组，不同沉积相黏土矿物特征差异显著：海相本溪组高岭石相对平均含量高达92.5，其次绿泥石相对平均含量7.5%，风化指数99.81，反映湿热气候；海陆过渡相太原组高岭石相对平均含量71.0%，其次伊蒙混层相对平均含量11.5%，风化指数92.2，气候向湿润转变；陆相山西组—上石盒子组高岭石相对平均含量59.25%～71%，其次为伊蒙混层平均相对含量27.7%～34.25%，风化指数81.89～90.4，表明气候逐渐由湿润向半干旱过渡。本研究为该地区地质历史时期的古气候与古环境变迁提供了重要依据。
关键词(KeyWords)： 黏土矿物;沉积环境;古气候;演化;宁武盆地
基金项目(Foundation): 国家自然科学基金项目(41772129)
作者(Author): 马延庆,李国勇,韩璐,关继超,赵飞,王泽唐,王超勇
参考文献(References)：
- [1]LI X,WANG Y,ZHANG X,et al.Sedimentary environment and paleoclimate evolution of the Ningwu Basin during the CarboniferousPermian period:Evidence from sedimentary facies and geochemistry[J].International Journal of Coal Geology,2023,267.
- [2]ZHAO Y,LIU X,CHEN X,et al.Clay mineral characteristics and their paleoenvironmental significance in the Late Paleozoic sediments of the North China Basin:A case study of the Ningwu Basin[J].Palaeogeography,Palaeoclimatology,Palaeoecology,2022,602.
- [3]ZHANG Y,SUN H,LI Z,et al.Influence of tectonic activity on sedimentary environment and clay mineralogy in the Ningwu Basin,North China[J].Journal of Asian Earth Sciences,2021,217.
- [4]LIU J,WANG H,GUO Y,et al.High-resolution paleoclimate reconstruction using clay minerals in the Permian sediments of the Ningwu Basin,North China[J].Quaternary International,2020,562:21-32.
- [5]WANG Q,LI J,ZHAO H,et al.Geochemical characteristics of clay minerals in the Carboniferous-Permian coal-bearing strata of the Ningwu Basin and their implications for sedimentary environment and provenance[J].Acta Geologica Sinica(English Edition),2023,97(3):1239-1254.
- [6]黄超，张明，刘鑫，等.中国宁武盆地晚古生代粘土矿物转变及其对古气候变化的响应[J].中国地质，2022,49(4):1344-1357.
- [7]LI Y,CHEN S,ZHANG Q,et al.New insights into the sedimentary environment and paleoclimate of the Ningwu Basin based on clay mineralogy and geochemical data[J].Geological Journal,2021,56(6):3511-3524.
- [8]郭志，刘悦，王峰，等.先进X射线衍射技术在宁武盆地粘土矿物分析中的应用[J].光谱学与光谱分析，2023,43(7):2231-2238.
- [9]LIU Z,WANG X,SUN X,et al.Clay mineral-based paleoclimate proxy models for the Carboniferous-Permian period in the Ningwu Basin[J].Journal of Geochemical Exploration,2022,239.
- [10]黄岑丽，袁文峰.河曲-保德矿区煤系高岭岩矿床特征与利用方向[J].中国煤炭地质，2008,20(5):20-23.
- [11]魏竣滨，韩培亮.基于煤岩煤质煤相特征的沁水15号富锂煤古环境分析[J].中国煤炭地质，2024,36(5):7-12,20.
- [12]孙明，张宇，赵亮，等.利用稀土元素和微量元素对宁武盆地粘土矿物物源分析[J].岩石学报，2020,36(11):3491-3504.
- [13]李刚，赵强，王霞，等.宁武盆地侏罗系沉积物中的粘土矿：特征、成因及古环境意义[J].地质科学，2023,58(3):841-856.