Sulfate-bearing deposits at Dalangtan Playa and their implication for the formation and preservation of martian salts

doi:10.2138/am.2014.4594

CORC > 中国地质调查局 > 中国地质调查局

	Sulfate-bearing deposits at Dalangtan Playa and their implication for the formation and preservation of martian salts
	Kong, W. G.5; Zheng, M. P.; Kong, F. J.; Chen, W. X.
刊名	AMERICAN MINERALOGIST
	2014
卷号	99 期号:2-3 页码:283-290
关键词	Mars analogs Tibetan Plateau DLT Playa sulfates deposits martian kieserite
ISSN号	0003-004X
DOI	10.2138/am.2014.4594
英文摘要	The sulfate-bearing strata on Mars must have recorded rich information of its aqueous history. However, the hydrated sulfates observed in the surface thin layer by remote sensing, especially widespread kieserite, are likely weathering products rather than pristine deposits. Here we report the results from mineralogical investigations and environmental monitoring on the sulfate-bearing Dalangtan Playa (an analog site with Mars-like environmental conditions in northern Tibetan Plateau) to examine the depositional and secondary processes of hydrated sulfates. The regional deposition characters of DLT Playa were described based on our mineralogical results. Widespread kieserite was identified in situ by portable laser Raman spectrometer on the weathered surface of the Mg-sulfates-rich section, which formed from the hexahydrite dehydration after exposed to the ambient conditions in six months covering the summer, and survived in the winter. During summer days, wind and sunlight may have facilitated the dehydration process, leading the formation of kieserite from dehydration. On the basis of the observed kieserite formation, the recorded local environment conditions, as well as previously reported phase diagrams for Mg-sulfates, we suggest that the current diurnal relative humidity-temperature circles at low latitudes of Mars favor the formation of kieserite through secondary processes.
学科主题	矿床地质
WOS关键词	ORBITAL IDENTIFICATION ; OMEGA/MARS EXPRESS ; SOUTHERN HIGHLANDS ; PHASE-EQUILIBRIA ; FERRIC SULFATE ; CLIMATE-CHANGE ; MG-SULFATE ; 0.1 MPA ; MARS ; CARBONATE
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	MINERALOGICAL SOC AMER
WOS记录号	WOS:000331676800006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40446]
专题	中国地质调查局
作者单位	1.[Kong, W. G. 2.Zheng, M. P. 3.Kong, F. J. 4.Chen, W. X.] CAGS, Inst Mineral Resources, MLR Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China 5.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Kong, W. G.,Zheng, M. P.,Kong, F. J.,et al. Sulfate-bearing deposits at Dalangtan Playa and their implication for the formation and preservation of martian salts[J]. AMERICAN MINERALOGIST,2014,99(2-3):283-290.
APA	Kong, W. G.,Zheng, M. P.,Kong, F. J.,&Chen, W. X..(2014).Sulfate-bearing deposits at Dalangtan Playa and their implication for the formation and preservation of martian salts.AMERICAN MINERALOGIST,99(2-3),283-290.
MLA	Kong, W. G.,et al."Sulfate-bearing deposits at Dalangtan Playa and their implication for the formation and preservation of martian salts".AMERICAN MINERALOGIST 99.2-3(2014):283-290.