Development and deployment of a deep-sea Raman probe for measurement of pore water geochemistry

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Development and deployment of a deep-sea Raman probe for measurement of pore water geochemistry
	Zhang, Xin 1,2,3; Walz, Peter M.1; Kirkwood, William J.1; Hester, Keith C.1; Ussler, William 1; Peltzer, Edward T.1; Brewer, Peter G.1
刊名	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
	2010-02-01
卷号	57 期号:2 页码:297-306
关键词	Pore water Raman spectroscopy Laser Geochemistry In situ analysis Deep-sea Gas hydrate
英文摘要	We have developed, deployed, and tested a novel probe for study of the geochemistry of sediment pore waters based upon Raman spectroscopy. The Raman technique has already been used successfully for in situ measurements of targets of scientific interest including gas and hydrothermal vents and complex gas hydrates, but sediment geochemistry has so far been an intractable problem since the sediments themselves are strongly fluorescent and typically only very small sample volumes are obtainable. The 35 cm long probe extracts pore fluids through a 10 mu m sintered metallic frit and draws the sample through a 2 mm diameter channel into a sapphire windowed optical cell within which the laser beam is focused and the spectrum recorded. The dead volume of the system is similar to 1 ml and the instrument is ROV deployable with activation of probe insertion and sample withdrawal under direct operator control. The unique features of this mode of detection include observation of the sulfate gradient in marine Pore waters as an indicator of diagenesis, direct measurement of the dissolved sulfide species H(2)S and HS(-), and measurement of dissolved methane; all of which are of primary geochemical interest. Quantitative analysis is achieved by area ratio to known water peaks and from standard calibration curves with a precision of +/- 5%. We find only very small fluorescence from Pore waters measured in situ, but observe rapid increases in fluorescence from cores returned to the Surface and exposed to oxygen. (C) 2009 Elsevier Ltd. All rights reserved.
收录类别	SCI
语种	英语
WOS记录号	WOS:000275219700010
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/32714]
专题	海洋研究所_海洋地质与环境重点实验室
作者单位	1.Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA 2.Ocean Univ China, Ocean Remote Sensing Inst, Qingdao 266003, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xin,Walz, Peter M.,Kirkwood, William J.,et al. Development and deployment of a deep-sea Raman probe for measurement of pore water geochemistry[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2010,57(2):297-306.
APA	Zhang, Xin.,Walz, Peter M..,Kirkwood, William J..,Hester, Keith C..,Ussler, William.,...&Brewer, Peter G..(2010).Development and deployment of a deep-sea Raman probe for measurement of pore water geochemistry.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,57(2),297-306.
MLA	Zhang, Xin,et al."Development and deployment of a deep-sea Raman probe for measurement of pore water geochemistry".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 57.2(2010):297-306.