| 山东烟台门楼水库火山岩剖面特征及地学意义 |
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| 关键词:geological significance volcanic rock profile characteristics Menlou Reservoir Shandong |
| 基金项目:中国地质调查局地质调查项目“华北地区重要地质遗迹调查(山东)”(编号: DD2017078);山东省自然资源厅;山东省财政厅地质环境保护类项目“山东省重要地质遗迹调查”(编号: 鲁财建指[2012]110号) |
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| Characteristics and Geological Significance of Volcanic Rock Profile in Menlou Reservoir of Shandong Province |
| A typical volcanic intrusion profile was found for the first time in Mashan, east of Yantai Menlou Reservoir, during the survey work of geological remains in Shandong Province. To accurately evaluate the geological significance of the profile, one sand sample and three basalt samples were profiled and accurately dated using ESR and K-Ar methods, respectively. Results showed that the Jiaodong area was a long-term stable or slightly uplifted area of the crust and could be regarded as a representative of the stable or relatively uplifted of Late Miocene. Furthermore, its volcanic activity can be roughly divided into three stages: The first stage is the eruption period of volcanic tuff and volcanic agglomerate, which occurred at approximately 7.19 Ma. The second stage is the multi-stage overflow period of basalt, which occurred at approximately 6.75 Ma. The third stage is the intrusion period of small fault activity and basalt vein, which occurred at approximately 5.32 Ma. However, its scale was obviously weaker than that of the first and second stage. The volcanic rock profile of Menlou Reservoir was a rare volcanic rock intrusion profile in China that belonged to a geological relic resource and had high scientific research and protection value. |
| MENG Yong-hui,ZHAO Xi-tao,CHENG Hong-yan,YU De-qin,WANG Qing-bing,WANG Zhen-tao,LUO Mei,LIU Yan-fe.2022.Characteristics and Geological Significance of Volcanic Rock Profile in Menlou Reservoir of Shandong Province[J].Acta Geoscientica Sinica,43(5):730-736. |
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