A Review of the Hydrochemistry of a Deep Sedimentary Aquifer and Its Consequences for Geothermal Operation: Klaipeda, Lithuania

Table 4

Analyses reported in Table 3, converted to milliequivalents per litre (meq/L) and molar ratios.

		Gerber et al.	2P wellhead	2P filter	2P	Glasgow 2P stored water	Seawater
Sample date		5/10/12	31/3/16	1/4/16	19/7/2016	5/4/17
Major cations
Na^2+	meq/L	1018	1057	1059	1074	1207	459
K^+	meq/L	14.2	15.8	15.8	16.8	21.0	9.7
Ca^2+	meq/L	318	377	375	381	399	20
Mg^2+	meq/L	179	195	195	197	202	104
Major anions
HCO3^-	meq/L	1.38	1.40	1.30	1.60	0.80	2.29
Cl^-	meq/L	1521	1594	1603	1853	2282	535
SO4^2-	meq/L	33.4	36.1	37.0	43.9	32.4	55.2
Minor elements
F^-	meq/L		0.02	0.02	0.02
Br^-	meq/L	4.33	4.45	4.16	5.66	3.25	0.81
Li^+	meq/L	0.48	0.49	0.46	0.52		0.0
Sr^2+	meq/L	3.26	3.77	3.79	3.86		0.30
Na/Cl molar ratio		0.67	0.66	0.66	0.58	0.53	0.86
Mg/Ca molar ratio		0.56	0.52	0.52	0.52	0.51	5.20
SO4/Cl eq ratio		0.022	0.023	0.023	0.024	0.014	0.103
Ca/Cl eq ratio		0.21	0.24	0.23	0.21	0.17	0.04
Mg/Cl eq ratio		0.12	0.12	0.12	0.11	0.09	0.19
Sr/Mg molar ratio		0.018	0.019	0.019	0.020		0.003
Sr/Ca molar ratio		0.010	0.010	0.010	0.010		0.015
Sum cations	meq/L	1532	1650	1649	1674	1836	593
Sum anions	meq/L	1560	1636	1646	1904	2331	594
IBE	%	-1%	0%	0%	-6%	-12%	0%

IBE = ion balance error.