Kinetic experiments of water rock interactions at high temperatures and high pressures corresponding to the middle crust conditions

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	Kinetic experiments of water rock interactions at high temperatures and high pressures corresponding to the middle crust conditions
	Zhang, RH (Zhang RongHua); Zhang, XT (Zhang XueTong); Hu, SM (Hu ShuMin); Su, YF (Su YanFeng)
刊名	ACTA PETROLOGICA SINICA
	2007
卷号	23 期号:11 页码:2933-2942
关键词	chemical kinetics Critical state Reaction of minerals with water Middle crust high conductance layer
ISSN号	1000-0569
英文摘要	In order to simulate the water-rock interactions in the middle crust, the dissolution kinetic experiments of minerals ( albite, actinolite, diopside) and basalt were carried out by using packed bed reactor, in the temperature range of 25 to 400 degrees C and at 22MPa. Experiments found that dissolution rates behave a fluctuation in dissolution rates, in the case of crossing the critical state of water, i. e. over the temperature range of 300 to 400 degrees C. When a multi-oxide silicate mineral dissolved in water, different dissolved aqueous metals behave different release rates. Experiments found that the maximum dissolution rates of silicate minerals always occurred at 300 degrees C, such as the maximum release rate of Si was at 300 degrees C. As temperature less than 300 degrees C, the release rates of Na, K, Mg, Ca, Fe, Al were higher than Si. Oppositely, the release rates of Si of silicate minerals were higher than those of other metals while temperature above 300 degrees C. Authors also performed dissolution kinetic experiments of basalts and granodiorite in water in the temperature range of 25 to 400 degrees C and 23MPa. The maximum release rates of Si in those experiments are also found at 300 degrees C. The fluids distributed in the middle crust present in a sub-critical state to the critical state region, behaving a strong variation of water properties. The variations of water properties in the middle crust will induce the fluctuation in kinetics of water-rock interaction. Thus, the variations of water properties and the kinetic behavior of water-rock interactions affect the features in the middle crust, such as strong release of Silica, breaking of silicate framework of minerals, and following rock layer collapse.
学科主题	岩矿鉴定与测试
WOS关键词	SYNTHETIC FLUID INCLUSIONS ; SODIUM-CHLORIDE SOLUTIONS ; DIAMOND-ANVIL CELL ; ELEVATED-TEMPERATURES ; AQUEOUS-SOLUTIONS ; SYSTEM H2O-NACL ; REACTION-RATES ; TRANSPORT-PROPERTIES ; SUPERCRITICAL WATER ; IR SPECTROSCOPY
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000254139500024
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38428]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Mineral Resources, Lab Geochem Kinet, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Zhang, RH ,Zhang, XT ,Hu, SM ,et al. Kinetic experiments of water rock interactions at high temperatures and high pressures corresponding to the middle crust conditions[J]. ACTA PETROLOGICA SINICA,2007,23(11):2933-2942.
APA	Zhang, RH ,Zhang, XT ,Hu, SM ,&Su, YF .(2007).Kinetic experiments of water rock interactions at high temperatures and high pressures corresponding to the middle crust conditions.ACTA PETROLOGICA SINICA,23(11),2933-2942.
MLA	Zhang, RH ,et al."Kinetic experiments of water rock interactions at high temperatures and high pressures corresponding to the middle crust conditions".ACTA PETROLOGICA SINICA 23.11(2007):2933-2942.