Economic and Environmental Geology

Table. 6. Table 6

Comparison of deposit characteristics between the Dashiqiao and Dancheon magnesite deposits

	Dashiqiao (China)	Dancheon (North Korea)
Host rock	• dolostone	• dolostone
Formation	• Dashiqiao Formation (Proterozoic)	• Bukdaecheon Series (Proterozoic)
Orebody	• white, gray, pinkish color • sparry texture • residual dolomite • talc-chlorite vein • dolomite, calcite vein	• pinkish, white, gray color • sparry texture • residual dolomite • talc-chlorite vein
Minerals	• major magnesite, talc • minor chlorite, apatite, quartz	• major magnesite • minor talc, chlorite, apatite, quartz, tremolite
Chlorite composition	• clinochlore, penninite, talc-chlorite	• mostly clinochlore
Homogenization temperature and salinity	• 121~250 ℃ (avg. 175 ℃) • 1.7~22.4 wt% NaCl (avg. 10.2 wt% NaCl)	• 112~272 ℃ (avg. 187 ℃) • 0.5~34.1 wt% NaCl (avg. 14.5 wt% NaCl)
Chlorite geothermometer	• 137~293 ℃ (avg. 228 ℃)	• 159~307 ℃ (avg. 212 ℃)
Pressure	• < 3.16 kb	• < 3.62 kb
Oxygen-carbon isotope	• δ¹⁸O: magnesite (9.2~16.9 ‰), dolomite (16.4~19.5 ‰) • δ¹³C: magnesite (-1.3~0.9 ‰), dolomiticmarble (0.6~1.4 ‰)	• δ¹⁸O: magnesite (8.7~11.4 ‰), dolomite (19.0~23.0 ‰) • δ¹³C: magnesite (0.1~0.8 ‰), dolomite (-0.95~1.0 ‰)
References	This study, Tang et al. (2013)	Lee et al. (2021)