Contrasted Effect of Spinel and Pyroxene on Molecular Hydrogen (H-2) Production during Serpentinization of Olivine

doi:10.3390/min11080794

	Contrasted Effect of Spinel and Pyroxene on Molecular Hydrogen (H-2) Production during Serpentinization of Olivine
	Huang, Ruifang 1; Ding, Xing 2; Sun, Weidong3,4 ; Shang, Xiuqi 3,4,5
	2021-08-01
发表期刊	MINERALS
卷号	11 期号:8 页码:15
通讯作者	Huang, Ruifang(huangrf@sustech.edu.cn)
摘要	Serpentinization produces molecular hydrogen (H-2) and hydrocarbons that can feed the colonies of microbes in hydrothermal vent fields, and therefore serpentinization may be important for the origins of life. However, the mechanisms that control molecular hydrogen (H-2) production during serpentinization remain poorly understood. Here the effect of pyroxene minerals and spinel on molecular hydrogen (H-2) generation during serpentinization is experimentally studied at 311-500 degrees C and 3.0 kbar, where olivine, individually and in combinations with pyroxene and/or spinel, is reacted with saline solutions (0.5 M NaCl). The results show a contrasting influence of spinel and pyroxeneon molecular hydrogen (H-2) production. At 311 degrees C and 3.0 kbar, spinel promotes H-2 generation by around two times, and pyroxene minerals decrease molecular hydrogen (H-2) production by around one order of magnitude. Spinel leaches aluminum (Al) and chromium (Cr) during hydrothermal alteration, and Al and Cr enhance molecular hydrogen (H-2) production. This is confirmed by performing experiments on the serpentinization of olivine with the addition of Al2O3 or Cr2O3 powders, and an increase in molecular hydrogen (H-2) production was observed. Pyroxene minerals, however, not only leach Al and Cr, but they also release silica (SiO2) during serpentinization. The sharp decline in molecular hydrogen (H-2) production in experiments with a combination of olivine and pyroxene minerals may be attributed to releases of silica from pyroxene minerals. With increasing temperatures (e.g., 400-500 degrees C), the effect of spinel and pyroxene minerals on molecular hydrogen (H-2) production is much less significant, which is possibly related tothe sluggish kinetics of olivine serpentinization under these T-P conditions. In natural geological settings, olivine is commonly associated with spinel and pyroxene, and molecular hydrogen (H-2) during serpentinization can be greatly affected.
关键词	molecular hydrogen serpentinization spinel pyroxene minerals
DOI	10.3390/min11080794
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of China[41873069] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050103] ; National Key R&D Program of China[2016YFC0600408]
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:000690624700001
出版者	MDPI
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/176297
专题	深海极端环境与生命过程研究中心
通讯作者	Huang, Ruifang
作者单位	1.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 5.Univ Chinese Acad Sci, Inst Oceanol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Ruifang,Ding, Xing,Sun, Weidong,et al. Contrasted Effect of Spinel and Pyroxene on Molecular Hydrogen (H-2) Production during Serpentinization of Olivine[J]. MINERALS,2021,11(8):15.
APA	Huang, Ruifang,Ding, Xing,Sun, Weidong,&Shang, Xiuqi.(2021).Contrasted Effect of Spinel and Pyroxene on Molecular Hydrogen (H-2) Production during Serpentinization of Olivine.MINERALS,11(8),15.
MLA	Huang, Ruifang,et al."Contrasted Effect of Spinel and Pyroxene on Molecular Hydrogen (H-2) Production during Serpentinization of Olivine".MINERALS 11.8(2021):15.

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