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

doi:10.1155/2019/7808036

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖地质与环境实验室

	The Sensitivity of Temperature to Tachyhydrite Formation Evidence from Evaporation Experiments of Simulated Brines Based on Compositions of Fluid Inclusions in Halite
	Cheng, Huaide; Hai, Qingyu; Li, Jun; Song, Jianguo; Ma, Xuehai
刊名	GEOFLUIDS
	2019-07-03
ISSN号	1468-8115
DOI	10.1155/2019/7808036
英文摘要	An average of concentrations of Na+, Mg2+, Ca2+, K+, and Cl- in fluid inclusions, from the Khorat Plateau evaporite primary halite, was employed. The evaporation-crystallization sequence and paths were obtained under various temperature conditions for the quinary system, Na+, K+, Mg2+, Ca2+//Cl--H2O. The results showed (1) a halite, sylvite, and carnallite stage at 25 degrees C; (2) a halite, sylvite, carnallite, and bischofite stage at 35 degrees C; and (3) a halite, sylvite, carnallite, bischofite, and tachyhydrite stage at 50 degrees C. These results indicated that (1) a hot state is favorable for tachyhydrite formation, (2) tachyhydrite occurs in the late evaporation stage, and (3) the stability field of tachyhydrite increases with increasing temperature. The crystallization paths were plotted by the application of Janecke phase diagram at 25 degrees C, 35 degrees C, and 50 degrees C involving the system Na+, K+, Mg2+, Ca2+//Cl--H2O. The crystallization sequence predicted on the Janecke phase diagram showed a good agreement with the experimental crystallization sequences and paths. Tachyhydrite precipitate more easily from a high Ca concentration solution during the late evaporation stage with increasing temperature under the same relative humidity condition. The evaporite mineral succession in the Khorat Plateau, Sergipe, and Congo basins agrees well with the mineral precipitation sequences predicted from their own fluid inclusions in halite. This is confirmed by the simulation of the Janecke phase diagram at 50 degrees C involving the system Na+, K+, Mg2+, Ca2+//Cl--H2O. The precipitation of tachyhydrite was sensitive to the temperature, and that the thermal resource may originate from a temperature profile in the solar pond. This study presented a simulated approach that can help in understanding similar cases that studies the sensitivity of temperature to salt formation.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34003]
专题	青海盐湖研究所_盐湖地质与环境实验室中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Cheng, Huaide,Hai, Qingyu,Li, Jun,et al. The Sensitivity of Temperature to Tachyhydrite Formation Evidence from Evaporation Experiments of Simulated Brines Based on Compositions of Fluid Inclusions in Halite[J]. GEOFLUIDS,2019.
APA	Cheng, Huaide,Hai, Qingyu,Li, Jun,Song, Jianguo,&Ma, Xuehai.(2019).The Sensitivity of Temperature to Tachyhydrite Formation Evidence from Evaporation Experiments of Simulated Brines Based on Compositions of Fluid Inclusions in Halite.GEOFLUIDS.
MLA	Cheng, Huaide,et al."The Sensitivity of Temperature to Tachyhydrite Formation Evidence from Evaporation Experiments of Simulated Brines Based on Compositions of Fluid Inclusions in Halite".GEOFLUIDS (2019).