Genesis Model of Geothermal Water in Dandong Area of Liaoning Province Based on Hydrogeochemical Characteristics

doi:10.19657/j.geoscience.1000-8527.2022.017

Abstract

Abstract:

Geothermal resources are abundant in Dandong. It is of great significance to establish the genesis model of the geothermal fields for sustainable utilization and further development. The geothermal fields of Bei-tang, Dongtang and Wulongbei were investigated for hydrochemical and isotopic analysis. The results show that the hydrochemical types of Beitang, Dongtang and Wulongbei geothermal water are SO₄·Cl-Na·Ca, HCO₃·SO₄-Na and HCO₃-Na·Ca, HCO₃·SO₄-Na and HCO₃·Cl-Na, respectively. The source of the thermal water is atmospheric precipitation. The recharge elevations of Beitang and Dongtang geothermal fields are 678 and 376 m, respectively. According to ¹⁴C dating methods, the ages of the thermal waters in Beitang, Dongtang and Wulongbei geothermal fields are 2,000-3,300 and 2,200-7,200 and 700-2,900 a B.P., respectively. The reservoir temperatures of Beitang, Dongtang and Wulongbei geothermal fields are predicted to be 92, 120, and 100-101 ℃, respectively according to the silica and lg(Q/K) geothermometer. The thermal water circulation depth of Beitang, Dongtang and Wulongbei geothermal fields are ca. 1,900, 3,000 and 800-1,800 m, respectively. The thermal water is heated up during deep circulation through the fault zone, and then upwelled into shallow aquifers or outcrops as springs at the intersection of NNE and NW trending faults, which belong to low to medium temperature geothermal system of convective type.

Key words: Dandong, geothermal field, genesis model, low to medium temperature geothermal system of convective type

CLC Number:

YANG Fengtian, SHI Yujia, LI Wenqing. Genesis Model of Geothermal Water in Dandong Area of Liaoning Province Based on Hydrogeochemical Characteristics[J]. Geoscience, 2022, 36(02): 474-483.

Figures/Tables 14

References 35

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编号	样品名称	水样类型		纬度 (N)		经度 (E)			温度/ ℃		TDS (mg/L)	pH		Ca²⁺/ (mg/L)		Mg²⁺/ (mg/L)		K⁺/ (mg/L)		Na⁺/ (mg/L)		Sr²⁺/ (mg/L)		N0₃^-/ (mg/L)		S0₄^2-/ (mg/L)
1	B01-W	温泉水		40°36'37″		124°04'29″			47.0		850	7.27		130.82		0.59		9.51		282.13		9.62		2.39		714.95
2	B02-H	河水		40°36'33″		124°04'34″			25.0		170	7.27		45.27		10.83		3.21		44.05		0.04		15.05		48.41
3	B03-H	河水		40°36'33″		124°04'12″			25.5		200	7.18		48.45		11.51		3.77		169.65		0.89		15.04		75.80
4	B04-D	浅层地下水		40°36'53″		124°04'12″			15.0		190	6.33		39.04		9.83		25.24		96.02		0.48		108.49		25.90
5	D01-W	温泉水		40°25'07″		124°18'01″			48.0		120	5.90		12.21		1.30		7.82		83.12		0		6.96		56.44
6	D02-D	浅层地下水		40°24'48″		124°18'33″			20.1		70	6.60		13.37		1.99		1.80		55.22		1.17		0		11.65
7	D03-D	浅层地下水		40°25'23″		124°17'57″			13.0		90	6.44		18.44		3.25		2.62		86.70		0.33		33.15		10.81
8	W01	地热井水		40°14'58″		124°16'37″			31.1		230	8.02		32.21		5.63		4.72		62.30		2.02		29.17		38.14
9	W02	地热井水		40°14'58″		124°16'37″			58.0		230	8.20		33.49		4.89		4.98		57.87		1.29		30.38		36.04
10	W03	地热井水		40°15'25″		124°15'55″			59.0		210	8.96		9.77		<0.4		4.64		85.98		0.71		2.90		34.26
11	W04	地热井水		40°15'28″		124°15'55″			59.5		240	8.26		14.27		<0.4		5.42		92.61		1.93		7.86		57.71
样品编号	样品名称	HC0₃^-/ (mg/L)	C0₃^2-/ (mg/L)		F^-/ (mg/L)		Cl^-/ (mg/L)	Br^-/ (mg/L)		SiO₂/ (mg/L)			H₂SiO₃/ (mg/L)		δ¹⁸O /‰		δ¹⁸O 标准偏差		δ²H/ ‰		δ²H 标准偏差		³H/ TU		¹⁴C/ pMC		δ¹³C/ ‰
1	B01-W	39.66	0		6.00		161.04	0.21		73.18			95.130		-9.77		0.10		-68.79		0.19		0		60.3		-17.7
2	B02-H	129.36	0		0.18		3.75	0		3.28			4.264		-8.59		0.15		-59.89		0.24		10.3		ND		ND
3	B03-H	124.49	0		0.55		9.26	0		6.48			8.424		-8.73		0.14		-60.16		0.30		10.4		ND		ND
4	B04-D	54.31	0		0.07		11.32	0		12.38			16.090		-8.40		0.22		-58.79		0.65		8.3		ND		ND
5	D01-W	95.19	0		7.88		13.35	0		115.43			150.059		-9.02		0.07		-61.34		0.50		1.0		37.6		-11.3
6	D02-D	36.61	0		0.14		3.96	13.20		19.98			25.970		-8.01		0.14		-55.40		0.23		8.9		ND		ND
7	D03-D	36.61	0		0.09		7.68	0		18.03			23.440		-8.39		0.24		-57.98		0.35		9.8		ND		ND
8	W01	167.67	0		1.57		31.80	0.02		56.28			73.160		-8.08		0.09		-55.90		0.48		7.9		ND		ND
9	W02	148.20	0		1.49		32.25	0.02		83.70			108.810		-8.04		0.07		-55.79		0.27		1.5		ND		ND
10	W03	95.19	7.05		8.91		19.28	0		85.33			110.929		-8.81		0.20		-59.68		0.40		1.8		ND		ND
11	W04	152.60	0		3.79		25.66	0.03		86.05			111.865		-8.50		0.15		-58.88		0.35		0		63.2		-15.8

编号	样品名称	水样类型		纬度 (N)		经度 (E)			温度/ ℃		TDS (mg/L)	pH		Ca²⁺/ (mg/L)		Mg²⁺/ (mg/L)		K⁺/ (mg/L)		Na⁺/ (mg/L)		Sr²⁺/ (mg/L)		N0₃^-/ (mg/L)		S0₄^2-/ (mg/L)
1	B01-W	温泉水		40°36'37″		124°04'29″			47.0		850	7.27		130.82		0.59		9.51		282.13		9.62		2.39		714.95
2	B02-H	河水		40°36'33″		124°04'34″			25.0		170	7.27		45.27		10.83		3.21		44.05		0.04		15.05		48.41
3	B03-H	河水		40°36'33″		124°04'12″			25.5		200	7.18		48.45		11.51		3.77		169.65		0.89		15.04		75.80
4	B04-D	浅层地下水		40°36'53″		124°04'12″			15.0		190	6.33		39.04		9.83		25.24		96.02		0.48		108.49		25.90
5	D01-W	温泉水		40°25'07″		124°18'01″			48.0		120	5.90		12.21		1.30		7.82		83.12		0		6.96		56.44
6	D02-D	浅层地下水		40°24'48″		124°18'33″			20.1		70	6.60		13.37		1.99		1.80		55.22		1.17		0		11.65
7	D03-D	浅层地下水		40°25'23″		124°17'57″			13.0		90	6.44		18.44		3.25		2.62		86.70		0.33		33.15		10.81
8	W01	地热井水		40°14'58″		124°16'37″			31.1		230	8.02		32.21		5.63		4.72		62.30		2.02		29.17		38.14
9	W02	地热井水		40°14'58″		124°16'37″			58.0		230	8.20		33.49		4.89		4.98		57.87		1.29		30.38		36.04
10	W03	地热井水		40°15'25″		124°15'55″			59.0		210	8.96		9.77		<0.4		4.64		85.98		0.71		2.90		34.26
11	W04	地热井水		40°15'28″		124°15'55″			59.5		240	8.26		14.27		<0.4		5.42		92.61		1.93		7.86		57.71
样品编号	样品名称	HC0₃^-/ (mg/L)	C0₃^2-/ (mg/L)		F^-/ (mg/L)		Cl^-/ (mg/L)	Br^-/ (mg/L)		SiO₂/ (mg/L)			H₂SiO₃/ (mg/L)		δ¹⁸O /‰		δ¹⁸O 标准偏差		δ²H/ ‰		δ²H 标准偏差		³H/ TU		¹⁴C/ pMC		δ¹³C/ ‰
1	B01-W	39.66	0		6.00		161.04	0.21		73.18			95.130		-9.77		0.10		-68.79		0.19		0		60.3		-17.7
2	B02-H	129.36	0		0.18		3.75	0		3.28			4.264		-8.59		0.15		-59.89		0.24		10.3		ND		ND
3	B03-H	124.49	0		0.55		9.26	0		6.48			8.424		-8.73		0.14		-60.16		0.30		10.4		ND		ND
4	B04-D	54.31	0		0.07		11.32	0		12.38			16.090		-8.40		0.22		-58.79		0.65		8.3		ND		ND
5	D01-W	95.19	0		7.88		13.35	0		115.43			150.059		-9.02		0.07		-61.34		0.50		1.0		37.6		-11.3
6	D02-D	36.61	0		0.14		3.96	13.20		19.98			25.970		-8.01		0.14		-55.40		0.23		8.9		ND		ND
7	D03-D	36.61	0		0.09		7.68	0		18.03			23.440		-8.39		0.24		-57.98		0.35		9.8		ND		ND
8	W01	167.67	0		1.57		31.80	0.02		56.28			73.160		-8.08		0.09		-55.90		0.48		7.9		ND		ND
9	W02	148.20	0		1.49		32.25	0.02		83.70			108.810		-8.04		0.07		-55.79		0.27		1.5		ND		ND
10	W03	95.19	7.05		8.91		19.28	0		85.33			110.929		-8.81		0.20		-59.68		0.40		1.8		ND		ND
11	W04	152.60	0		3.79		25.66	0.03		86.05			111.865		-8.50		0.15		-58.88		0.35		0		63.2		-15.8

温泉名称	温度/℃	水量/(t/h)	TDS/(mg/L)	水化学类型
北汤温泉	40	1.0	1 300	SO₄-Na·Ca
东汤温泉	70	30.0	500	HCO₃·SO₄-Na

温泉名称	温度/℃	水量/(t/h)	TDS/(mg/L)	水化学类型
北汤温泉	40	1.0	1 300	SO₄-Na·Ca
东汤温泉	70	30.0	500	HCO₃·SO₄-Na

样品编号	位置	水样类型	t/a B.P. (Vogel 模型)	t/a B.P. (Tamers 模型)	t/a B.P. (Pearson 模型)
B01-W	北汤	温泉水	3 310	/	2 016
D01-W	东汤	温泉水	7 215	6 089	2 210
W04	五龙背	地热井水	2 920	/	690