Experimental study of water-basalt interactions in Luzong volcanic basin and its applications

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	Experimental study of water-basalt interactions in Luzong volcanic basin and its applications
	Hu, SM (Hu ShuMin); Zhang, RH (Zhang RongHua); Zhang, XT (Zhang XueTong); Huang, WB (Huang WenBin)
刊名	ACTA PETROLOGICA SINICA
	2010
卷号	26 期号:9 页码:2681-2693
关键词	Water rock interaction Kinetics experiment High temperatures and pressure Alteration zoning Basalt
ISSN号	1000-0569
英文摘要	Strong eruption of basalt and combined deep magmatic activity occurred in Luzong volcanic basin, then followed by a large hydrothermal activities, which lead to form ore-formation and alteration zoning. The ore forming alteration behaves a distinct zoning. Melano-cratic alteration in the inner part and leucocratic alteration zoning in the outer part are present in those volcanic centers. Basalt was collected to be experimental samples, and water-basalt interaction experiments were performed using flow through reactor at high temperatures from 20 degrees C to 400 degrees C and at 23MPa, with a purpose in understanding the alteration zonation mechanism and metal origin. Experiments found the release rates of various metals of the basalt are different in most cases. As temperature below 300 degrees C, Na, Ca, Mg, Fe, Al more easily release into water than Si. But, Si more easily dissolves in water at temperature above 300 degrees C than the others. Si reaches the maximum release rate at 300 degrees C. The above fluctuation of dissolution rates occurred at 300 degrees C. The transition boundary from melanocratic alteration zone to leucocratic alteration zone usually happened at 300 degrees C. Both are coincident. Experiments indicate that reaction rates and dissolution products at the temperature >300 degrees C are different from that at temperature < 300 degrees C. The results can be used to understand the genesis of hydrothermal alteration and ores. Results prove that water-rock interaction will lead to form a metal bearing fluids. Those water rock interactions will affect the nature of the deep rock layers at volcanic center or in the middle crust. Deep geophysical survey obtained an abundant data for Luzong basin. Experimental results will be used for us to interpret the nature of deep rock layers.
学科主题	岩矿鉴定与测试
WOS关键词	SOLUTION SATURATION STATE ; DE-FUCA RIDGE ; DISSOLUTION RATES ; PRECIPITATION KINETICS ; FELDSPAR DISSOLUTION ; GLASS DISSOLUTION ; CHEMICAL AFFINITY ; FLOW SYSTEMS ; DEPENDENCE ; CHEMISTRY
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000283384100013
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39148]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Lab Ceochem Kinet, Inst Mineral Resources, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Hu, SM ,Zhang, RH ,Zhang, XT ,et al. Experimental study of water-basalt interactions in Luzong volcanic basin and its applications[J]. ACTA PETROLOGICA SINICA,2010,26(9):2681-2693.
APA	Hu, SM ,Zhang, RH ,Zhang, XT ,&Huang, WB .(2010).Experimental study of water-basalt interactions in Luzong volcanic basin and its applications.ACTA PETROLOGICA SINICA,26(9),2681-2693.
MLA	Hu, SM ,et al."Experimental study of water-basalt interactions in Luzong volcanic basin and its applications".ACTA PETROLOGICA SINICA 26.9(2010):2681-2693.