Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China

doi:10.1007/s12665-017-7171-y

	Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China
	Pang, Jumei 1,2,3; Pang, Zhonghe 1,2,3; Lv, Min 1,2,3; Tian, Jiao 1,2,3; Kong, Yanlong 1,2,3
刊名	ENVIRONMENTAL EARTH SCIENCES
	2018
卷号	77 期号:1
关键词	Geothermal fluids Reservoir temperature Gas Carbon isotope Helium isotope
ISSN号	1866-6280
DOI	10.1007/s12665-017-7171-y
文献子类	Article
英文摘要	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 delta H-2 and delta O-18 in water, delta C-13 in CH4, delta C-13 in CO2, and He-3/He-4 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 degrees C. The results show that the gases are made up mainly by N-2 (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 N-2, 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 degrees C. The mantle-derived heat fraction in the surface heat flow is estimated to be in the range of 48-51% based on He-3/He-4 ratios.
WOS关键词	GEOGRAPHICAL-DISTRIBUTION ; VOLATILE FLUXES ; NEW-ZEALAND ; HEAT-SOURCE ; CARBON ; HELIUM ; GAS ; ORIGIN ; SYSTEM ; BASIN
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000424366000002
资助机构	National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257) ; National Natural Science Foundation of China(41372257)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82870]
专题	中国科学院地质与地球物理研究所
通讯作者	Pang, Zhonghe
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, 19 Beituchengxi Rd, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Pang, Jumei,Pang, Zhonghe,Lv, Min,et al. Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China[J]. ENVIRONMENTAL EARTH SCIENCES,2018,77(1).
APA	Pang, Jumei,Pang, Zhonghe,Lv, Min,Tian, Jiao,&Kong, Yanlong.(2018).Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China.ENVIRONMENTAL EARTH SCIENCES,77(1).
MLA	Pang, Jumei,et al."Geochemical and isotopic characteristics of fluids in the Niutuozhen geothermal field, North China".ENVIRONMENTAL EARTH SCIENCES 77.1(2018).