Characterization of Origin and Evolution of Formation Water in Buried Hill of Jizhong Depression, China, Using Multivariate Statistical Analysis of Geochemical Data

Table 1

The geochemical characteristics of different types of formation water in buried hill, Jizhong Depression.

Type	Total dissolved solid (g/l)	Hydrochemical type		Main cation and anion (percentage of meq)	Ionic ratio (Min∼Max) average		Occurrence location
		Surin classification	Shu kraft classification		rNa/rCl	r(Cl-Na)/rMg
C1	<1	NaHCO3	HCO3-Na and HCO3-Na·Mg·Ca	(64%); Na^+ (77%)	(3.0∼5.0); 3.9	(−70∼−50); −61	In west of Taihangshan uplift
C2	1∼10	NaHCO3	Cl⋅HCO3-Na	(55%); (39%); Na^+ (94%)	(1.1∼2.8); 1.9	(−55∼−10); −33	In high uplift of buried hill
C3	5∼30	NaHCO3 and CaCl2	Cl-Na	(95%); Na^+ (82%)	(0.85∼1.4); 1.1	(−12∼9); −3	The slope between the buried hill and sag
C4	8∼50	CaCl2	Cl-Na·Ca	(93%); Na^+ (62%); Ca^2+ (33%)	(0.3∼1.0); 0.7	(4∼18); 8	In buried hill of sag