| 山东莱芜盆地西北缘古近系半固结含水岩组的特征及其成因 |
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| 关键词:Laiwu Basin semi-consolidated water bearing formation early diagenesis stage A sedimentary evolution history hydrochemical characteristics |
| 基金项目:国家自然科学基金项目(编号: 41240021);中国地质调查局水工环地质调查项目(编号: DD20160289) |
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| 摘要: |
| The Characteristics and Genetic Analysis of the Paleogene Semi-consolidated Water-bearing Formation on the Northwestern Margin of Laiwu Basin, Shandong Province |
| The physical properties and characteristics of hydrochemistry and groundwater recharge cycle of the Paleogene semi-consolidated aquifer were recognized on the northwestern margin of Laiwu Basin based on core cataloging, logging, analyzing conventional ion components and hydrogen and oxygen isotopes. The model of groundwater enrichment in semi-consolidated aquifers was established in combination with the study of sedimentary evolution history since Paleocene and diagenesis stage division of the semi-consolidated aquifer. The results show that the Paleogene sand-gravel aquifer was in the early diagenetic stage A, which was buried more than 100 meters with the capacity of weak consolidation and semi-consolidation. The aquifer has both fracture and pore space characteristics, with the main space being pore space. The hydrochemical type is HCO3-Ca?Mg, similar to the type of carbonate aquifers. Modern precipitation is the main source of groundwater recharge. Evaporation and concentration, dissolution of carbonate, gypsum and salt rocks participated in the formation of hydrochemical components. In the zone of boundary fault, some fracture blocks can be regarded as the emergency water exploration target area of Paleogene water bearing formation. |
| LIU Yuan-qing,ZHOU Le,LI Wei,ZHU Qing-jun,XU Meng,LÜ Lin,DENG Qi-jun,HE Jin,WANG Xin-feng.2018.The Characteristics and Genetic Analysis of the Paleogene Semi-consolidated Water-bearing Formation on the Northwestern Margin of Laiwu Basin, Shandong Province[J].Acta Geoscientica Sinica,39(6):737-748. |
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