The Sensitivity of Temperature to Tachyhydrite Formation: Evidence from Evaporation Experiments of Simulated Brines Based on Compositions of Fluid Inclusions in Halite

Table 4

Evaporation-crystallization path and mineral phase of predicted and experimental results.

	Condition	25°C	35°C	50°C
Evaporation-crystallization path	Predicted	“O-E-F-G-H-R”	“O-E-F-G-J-K”	“O-E-F-G-J-K-M”
	Experimental	“O-e-f”	“O-e-f-m”	“O-e-f-g-h”
Mineral phase	Predicted	“O”: halite	“O”: halite	“O”: halite
		“O-E”: halite+sylvite	“O-E”: halite+sylvite	“O-E”: halite+sylvite
		“E-F”: halite+carnallite	“E-F”: halite+carnallite	“E-F”: halite+carnallite
		“F-G”: halite+carnallite+bischofite	“F-G”: halite+carnallite+bischofite	“F-G”: halite+carnallite+bischofite
		“G-H”: halite+carnallite+tachyhydrite	“G-J”: halite+carnallite+tachyhydrite	“G-J”: halite+carnallite+tachyhydrite
		“H-R”: halite+antarcticite	“J-K”: halite+calcium chloride tetrahydrate	“J”: halite+carnallite+tachyhydrite+chlorocalcite
				“J-K”: halite+tachyhydrite+chlorocalcite
				“K”: halite+tachyhydrite+chlorocalcite+calcium chloride dihydrate
				“K-M”: halite+calcium chloride dihydrate
	Experimental	“O”: halite	“O”: halite	“O”: halite
		“O-e”: halite+sylvite	“O-e”: halite+sylvite	“O-e”: halite+sylvite
		“e-f”: halite+carnallite	“e-f”: halite+carnallite	“e-f”: halite+carnallite
			“f-m”: halite+carnallite+bischofite	“f-g”: halite+carnallite+bischofite
				“g-m”: halite+carnallite+tachyhydrite