Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China
| العنوان: | Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China |
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| المؤلفون: | Zhonghe Pang, Yanlong Kong, Min Lv, Jumei Pang, Jiao Tian |
| المصدر: | Environmental Earth Sciences. 77 |
| بيانات النشر: | Springer Science and Business Media LLC, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Global and Planetary Change, Oxygen-18, 010504 meteorology & atmospheric sciences, δ13C, δ18O, Stable isotope ratio, Geochemistry, Soil Science, Geology, 010502 geochemistry & geophysics, 01 natural sciences, Pollution, Isotopes of oxygen, Methane, chemistry.chemical_compound, chemistry, Isotopes of carbon, Environmental Chemistry, Geothermal gradient, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology |
| الوصف: | Niutuozhen geothermal field is located in the Jizhong graben, belonging to the northern part of Bohai Bay Basin in North China. Chemical and isotopic analyses were carried out on 14 samples of the geothermal fluids discharged from Neogene Minghuazhen (Nm), Guantao (Ng), and Jixianian Wumishan (Jxw) formations. The δ2H and δ18O in water, δ13C in CH4, δ13C in CO2, and 3He/4He ratio in the gases were analyzed in combination with chemical analyses on the fluids in the Niutuozhen geothermal field. The chemical and isotopic compositions indicate a meteoric origin of the thermal waters. The reservoir temperatures estimated by chemical geothermometry are in the range between 60 and 108 °C. The results show that the gases are made up mainly by N2 (18.20–97.42 vol%), CH4 (0.02–60.95 vol%), and CO2 (0.17–25.14 vol%), with relatively high He composition (up to 0.52 vol%). The chemical and isotopic compositions of the gas samples suggest the meteoric origin of N2, predominant crustal origins of CH4, CO2, and He. The mantle-derived He contributions are calculated to be from 5 to 8% based on a crust–mantle binary mixing model. The deep temperatures in the Jxw reservoir were evaluated based on gas isotope geothermometry to be in the range from 141 to 165 °C. The mantle-derived heat fraction in the surface heat flow is estimated to be in the range of 48–51% based on 3He/4He ratios. |
| تدمد: | 1866-6299 1866-6280 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::5f2906421b366f37ae778206ba781490 https://doi.org/10.1007/s12665-017-7171-y |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........5f2906421b366f37ae778206ba781490 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 18666299 18666280 |
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