Influence of pyroxene and spinel on the kinetics of peridotite serpentinization

doi:10.1002/2017JB014231

QIBEBT-IR

	Influence of pyroxene and spinel on the kinetics of peridotite serpentinization
	Huang, Ruifang 1,2; Song, Maoshuang 3; Ding, Xing 3; Zhu, Sanyuan 4; Zhan, Wenhuan 2; Sun, Weidong 5,6,7
	2017-09-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN	2169-9313
卷号	122 期号:9 页码:7111-7126
摘要	Hydrothermal experiments were performed at 311 degrees C and 3.0 kbar on natural olivine and peridotite to investigate the kinetics of serpentinization. The results show that the rates of reaction strongly depend on grain sizes of solid reactants, with smaller grain sizes resulting in faster kinetics. After 27 days of reaction, the reaction extent was 99% for peridotite with grain sizes of <30 mu m, and the reaction extent was 28% for grain sizes of 100-177 mu m. Compared to peridotite, olivine is serpentinized at much slower rates, e.g., 5.3% of reaction extent was achieved for olivine with grain sizes of 100-177 mu m after 27 days, approximately five times lower than that reached during peridotite serpentinization. Such contrasting results are due to the presence of pyroxene and spinel, an interpretation which is supported by a marked increase in reaction extents for experiments with the addition of pyroxene and spinel. The reaction extent achieved in experiments with 3 wt% spinel greatly increased to 98% after 27 days, much higher than that achieved during olivine serpentinization. These results appear to be related to pyroxene and spinel releasing Al and Cr during serpentinization. As indicated by compositions of serpentine, orthopyroxene lost similar to 60% of Al at a reaction extent of 59%. Influence of Al and Cr is suggested by a dramatic increase in reaction extents with the addition of Al2O3 and Cr2O3 powders. Olivine in natural geological settings is commonly associated with pyroxene and spinel; consequently, serpentinization kinetics may be much faster than previously thought.
文章类型	Article
关键词	Serpentinization Kinetics Peridotite Spinel Aluminum Chromium
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1002/2017JB014231
关键词[WOS]	MID-ATLANTIC RIDGE ; HOSTED HYDROTHERMAL SYSTEMS ; FORE-ARC MANTLE ; VENT FLUIDS ; LOST CITY ; CHEMICAL-COMPOSITION ; ABYSSAL PERIDOTITES ; HYDRATION REACTIONS ; ULTRAMAFIC ROCKS ; MIDOCEAN RIDGES
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
项目资助者	Natural Science Foundation of China(41603060 ; China postdoctoral Science Foundation(2015M570735 ; Chinese Academy of Sciences(XDB06030100) ; 91328204) ; 2016T90805)
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000412881700009
出版者	AMER GEOPHYSICAL UNION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/10462
专题	中国科学院青岛生物能源与过程研究所
通讯作者	Huang, Ruifang; Sun, Weidong
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou, Guangdong, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Guangdong, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China 6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 7.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Huang, Ruifang,Song, Maoshuang,Ding, Xing,et al. Influence of pyroxene and spinel on the kinetics of peridotite serpentinization[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2017,122(9):7111-7126.
APA	Huang, Ruifang,Song, Maoshuang,Ding, Xing,Zhu, Sanyuan,Zhan, Wenhuan,&Sun, Weidong.(2017).Influence of pyroxene and spinel on the kinetics of peridotite serpentinization.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,122(9),7111-7126.
MLA	Huang, Ruifang,et al."Influence of pyroxene and spinel on the kinetics of peridotite serpentinization".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122.9(2017):7111-7126.