The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield
ObjectivesIn order to understand the indicative significance of the geochemical behavior of rare earth elements （REEs） in deep karst geothermal water of the coalfield in North China.MethodsTaking the Pingdingshan coalfield as an example， the distribution characteristics and migration pattern of REEs...
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Academic Publishing Center of HPU
2025-01-01
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| Series: | 河南理工大学学报. 自然科学版 |
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| Online Access: | http://xuebao.hpu.edu.cn/info/11196/95992.htm |
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| author | LI Yanhe WU Zhanhui LI Jiexiang YU Zhenzi ZHANG Bo WANG Xinyi |
| author_facet | LI Yanhe WU Zhanhui LI Jiexiang YU Zhenzi ZHANG Bo WANG Xinyi |
| author_sort | LI Yanhe |
| collection | DOAJ |
| description | ObjectivesIn order to understand the indicative significance of the geochemical behavior of rare earth elements （REEs） in deep karst geothermal water of the coalfield in North China.MethodsTaking the Pingdingshan coalfield as an example， the distribution characteristics and migration pattern of REEs in the deep karst geothermal water were investigated through field sampling， laboratory testing， combined with analysis of rare earth element distribution patterns and simulation of occurrence forms.ResultsThis study shows that the contents of REEs in the Cambrian reservoirs in Pingdingshan coalfield is raletively low （0.054~0.244 μg/L）， and decrease along the flowing path. The standardized distribution pattern of rare earth elements （PAAS） shows a relative enrichment of MREEs and HREEs and a relative depletion of LREEs， and obvious Eu positive anomalies and varying degrees of Ce negative anomalies. The degree of Ce negative anomalies and Eu positive anomalies decreases from the recharge area to the discharge area. The simulation results of MINTEQ show that the REEs in the geothermal water are dominated by complex species of Ln(CO3)2- and LnCO3+， and the proportion of Ln(CO3)2- increases significantly with increasing atomic number or pH value， while the content of LnCO3+ decreases sequentially. In addition， there are still small amount of LnSO4+，Ln3+，LnHCO32+，LnF2+， and Ln(SO4)2- species in the geothermal fluid， whose contents decrease sequentially with the atomic number， controlled by the pH as well as HCO3-，SO42-， and F- contents of geothermal water. In addition， there are obvious Y positive anomalies and high ρ （Y）/ρ （Ho） in karst geothermal water， which is closely related to the enrichment of Ca2+ in geothermal water.ConclusionsThe research results expand the application of REEs in the study of coalfield hydrogeochemistry， and can provide a basis for revealing the recharge， runoff， and discharge processes of deep karst geothermal water in mining areas. |
| format | Article |
| id | doaj-art-b2fe2eb9e7c045a199d3f40b7d7fc481 |
| institution | OA Journals |
| issn | 1673-9787 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Academic Publishing Center of HPU |
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| series | 河南理工大学学报. 自然科学版 |
| spelling | doaj-art-b2fe2eb9e7c045a199d3f40b7d7fc4812025-08-20T02:08:43ZzhoAcademic Publishing Center of HPU河南理工大学学报. 自然科学版1673-97872025-01-01441889910.16186/j.cnki.1673-9787.20230100181673-9787（2025）1-88-12The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan CoalfieldLI Yanhe0WU Zhanhui1LI Jiexiang2YU Zhenzi3ZHANG Bo4WANG Xinyi5Pingdingshan Tianan Coal. Co.， Ltd.， Pingdingshan 467099， Henan， ChinaSchool of Resources and Environment， Henan Polytechnic University， Jiaozuo 454000， Henan， ChinaSchool of Resources and Environment， Henan Polytechnic University， Jiaozuo 454000， Henan， ChinaPingdingshan Tianan Coal. Co.， Ltd.， Pingdingshan 467099， Henan， ChinaPingdingshan Tianan Coal. Co.， Ltd.， Pingdingshan 467099， Henan， ChinaSchool of Resources and Environment， Henan Polytechnic University， Jiaozuo 454000， Henan， ChinaObjectivesIn order to understand the indicative significance of the geochemical behavior of rare earth elements （REEs） in deep karst geothermal water of the coalfield in North China.MethodsTaking the Pingdingshan coalfield as an example， the distribution characteristics and migration pattern of REEs in the deep karst geothermal water were investigated through field sampling， laboratory testing， combined with analysis of rare earth element distribution patterns and simulation of occurrence forms.ResultsThis study shows that the contents of REEs in the Cambrian reservoirs in Pingdingshan coalfield is raletively low （0.054~0.244 μg/L）， and decrease along the flowing path. The standardized distribution pattern of rare earth elements （PAAS） shows a relative enrichment of MREEs and HREEs and a relative depletion of LREEs， and obvious Eu positive anomalies and varying degrees of Ce negative anomalies. The degree of Ce negative anomalies and Eu positive anomalies decreases from the recharge area to the discharge area. The simulation results of MINTEQ show that the REEs in the geothermal water are dominated by complex species of Ln(CO3)2- and LnCO3+， and the proportion of Ln(CO3)2- increases significantly with increasing atomic number or pH value， while the content of LnCO3+ decreases sequentially. In addition， there are still small amount of LnSO4+，Ln3+，LnHCO32+，LnF2+， and Ln(SO4)2- species in the geothermal fluid， whose contents decrease sequentially with the atomic number， controlled by the pH as well as HCO3-，SO42-， and F- contents of geothermal water. In addition， there are obvious Y positive anomalies and high ρ （Y）/ρ （Ho） in karst geothermal water， which is closely related to the enrichment of Ca2+ in geothermal water.ConclusionsThe research results expand the application of REEs in the study of coalfield hydrogeochemistry， and can provide a basis for revealing the recharge， runoff， and discharge processes of deep karst geothermal water in mining areas.http://xuebao.hpu.edu.cn/info/11196/95992.htmpingdingshan coalfieldkarst geothermal watershydrochemistryrare earth elements （rees） |
| spellingShingle | LI Yanhe WU Zhanhui LI Jiexiang YU Zhenzi ZHANG Bo WANG Xinyi The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield 河南理工大学学报. 自然科学版 pingdingshan coalfield karst geothermal waters hydrochemistry rare earth elements （rees） |
| title | The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield |
| title_full | The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield |
| title_fullStr | The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield |
| title_full_unstemmed | The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield |
| title_short | The distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in Pingdingshan Coalfield |
| title_sort | distribution characteristics and its influencing factors of rare earth elements in the karst geothermal water in pingdingshan coalfield |
| topic | pingdingshan coalfield karst geothermal waters hydrochemistry rare earth elements （rees） |
| url | http://xuebao.hpu.edu.cn/info/11196/95992.htm |
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