<sup>210</sup>Pb and<sup>210</sup>Po in sea water around the hydrothermal vents in the Okinawa Trough

YANG Yong-liang; KUSAKABE Masashi; YAMAMOTO Yoshiyuki

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YANG Yong-liang, KUSAKABE Masashi, YAMAMOTO Yoshiyuki. 210Pb and210Po in sea water around the hydrothermal vents in the Okinawa Trough[J]. Haiyang Xuebao, 2001, 23(6): 59-75.

Citation:

YANG Yong-liang, KUSAKABE Masashi, YAMAMOTO Yoshiyuki. ²¹⁰Pb and²¹⁰Po in sea water around the hydrothermal vents in the Okinawa Trough[J]. Haiyang Xuebao, 2001, 23(6): 59-75.

YANG Yong-liang, KUSAKABE Masashi, YAMAMOTO Yoshiyuki. 210Pb and210Po in sea water around the hydrothermal vents in the Okinawa Trough[J]. Haiyang Xuebao, 2001, 23(6): 59-75.

Citation:

YANG Yong-liang, KUSAKABE Masashi, YAMAMOTO Yoshiyuki. ²¹⁰Pb and²¹⁰Po in sea water around the hydrothermal vents in the Okinawa Trough[J]. Haiyang Xuebao, 2001, 23(6): 59-75.

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²¹⁰Pb and²¹⁰Po in sea water around the hydrothermal vents in the Okinawa Trough

1.
Department of Environmental Science, Qingdao University, Qingdao 266071, China
2.
Japan Marine Science and Technology Center, 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
3.
Sewage Water Bureau, City of Yokohama, Yokohama 230-0004, Japan

Received Date: 2001-03-07
Rev Recd Date: 2001-08-27

Abstract

Abstract

Vertical profiles for the uranium-series radioisotopes ²¹⁰Pb and ²¹⁰Po were obtained at the two hydro thermal ventsites,the Iheya Ridge and the Minami-Ensei Knoll,in the Mid-Okinawa Trough in 1993 and 1994,respectively.At the Ihey a Ridge,where the hydrothermal activity is not active as reflected by the CH₄ and ²²²Rn data,both the total ²¹⁰Pb and ²¹⁰Po activities show deficient relative to their parents,and the mean residence time of ²¹⁰Pb and ²¹⁰Po is about 20 and 2~5 a,respectively.At the Minami-Ensei Knoll,which is characterized byblack smokers,the total ²¹⁰Pb activity(0.167×10^-3～2.50×10^-3Bq/kg) around the plumes is deficient relative to ²²⁶Ra but the total ²¹⁰Po activity(1.83×10^-3～2.83×10^-3Bq/kg) is in excess relative to ²¹⁰Pb.The ²¹⁰Po activities are higher than those in the East China Sea and the Okinawa Trough,and excess ²¹⁰Po has beenfound.The ²¹⁰Pb/²²⁶Ra and²¹⁰Po/²¹⁰Pb activity ratios are 0.1~0.4 and 1.1~7.8,respectively.²¹⁰Pb is preferentially scavenged in the hydrothermal plumes.The possible mechanisms governing the concentration of ²¹⁰Pb in the Minami-Ensei Knoll involve a lateral transport of ²¹⁰Pb viadiffusion.The high ²¹⁰Po/²¹⁰Pb activity ratios in the hydrother mal plumes suggest a depletion of ²¹⁰Pb and addition of ²¹⁰Po in the hydrothermal vent area.
- Okinawa Trough,
- hydrothermal vent,
- ²¹⁰Pb,
- ²¹⁰Po

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References(31)

References

JACOBS L,EMERSON S,SKEI J.Partitioning and transport of metals across the O₂/H₂S interface in a permanently anoxic fjord in Norway[J].Geochim Cosmochim Acta,1985,(49):1 433～1 444.

JACOBS L,EMERSON S,HUESTED S S.Trace metal geochemistry in the Cariaco Trench[J].Deep-Sca Res,1987,(34):965～981.

KADKO D.Radioisotopic studies of submarine hydrothermal vents[J].Rev Geophys,1996,(34):349～366.

BACON M P,SPENCER D W,BREWER P G.²¹⁰Pb/²²⁶Ra and ²¹⁰Po/²¹⁰Pb disequilibria in sea water and suspended particulate matter[J].Earth Planet Sci Lett,1976,(32):277～296.

NOZAKI Y,THOMSON J,TUREKIAN K K.The distribution of Pb-210 and Po-210 in the surface waters of the Pacific Ocean[J].Earth Planet Sci Lett,1976,(32):304～312.

SOMAYAJULU B L K,CRAIG H.Particulate and soluble ²¹⁰Pb activities in the deep sea[J].Earth Planet Sci Lett,1976,(32):268～276.

TODDJ F,WONGGTF,REIDDF.The geochemistry of ²¹⁰Po and ²¹⁰Pb in waters overlying and within the Orca Basin,Gulf of Mexico[J].Deep-Sea Res,1986,(33):1 293～1 306.

ISHIBASHI J,GAMO T,SAKAI H,et al.Geochemical evidence for hydrothermal activity in the Okinawa Trough[J].G eochen J,1988,(22):107～114.

AOKI M,MATSUMOTO T,KIMURA M,et al.Hydrothermal activity and topographic features in the western part of the Minami-Ensei Knoll,Northern Okinawa Trough[J].JAMSTEC J Deep-Sca Res,1993,(9):309～319.

TANAKAT,MISTUZAWAK,HOTTAH.SHINKAI 2000 diving surveys in the East of Iheya Srall Ridge in the cen tral Okinawa Trough[J].JAMSTEC J Deep-Sca Res,1989,(5):267～281.

GAMO T,SAKAI H,ISHIBASHI J,et al.Growth mechanism of the hydrothermal mounds at the CLAM Site,Mid-Okinawa Trough,inferred from their morphological,mineralogical,and chemical characteristics[J].JAMSTEC J Deep-Sea Res,1991,(7):163～184.

GAMO T,SAKAI H,KIM E-S,et al.Geochemical studies on the hydrothermal activity of the Mid-Okinawa Trough:a report on dive 416 of the SHINKAI 2000 and characterization of hydrothermal fluids from concentrations of major chemical components[J].JAMSTEC J Deep-Sea Res,1990,(6):51～62.

SHITASHIMA K.Distribution and behavior of trace metals on the Okinawa Trough[J].JAMSTEC J Deep-Sea Res,1994,(10):291～298.

CHIBA H,NAKAJIMA K,GAMO T,et al.Hydrothermal activity at the Minami-Ensei Knoll,Okinawa Trough:chemical characteristics of hydrothermal solutions[J].JAMSTEC J Deep-Sea Res,1993,(9):271～282.

MOORE W S.Sampling Ra-228 in the deep ocean[J].Deep-Sea Res,1976,(23):647～651.

MOTTL M J,SANSONE F J,WHEAT C G,et al.Manganese and methane in hydrothermal plumes along the East Pacific Rise,8°40' to 11°50'N[J].Geochimi Cosmochimi Acta,1995,(59):4 147～4 165.

ELDERFIELD H,SCHULTZ A.Mid-ocean ridge hydrothermal fluxes and the chemical composition of the ocean[J].Annu Rev Earth Planet Sci,1996,(24):191～224.

CHUNG Yu-jian,CRAIG H.Pb-210 in the Pacific:the GEOSECS measurements of particulate and dissolved concentrations[J].Earth Planet Sci Lett,1983,(65):406～432.

BACON M P,BREWER P G,SPENCER D W,et al.Lead-210 and polonium-210,manganese and iron in the Cariaco Trench[J].Deep-Sea Res,1980,(27A):119～135.

KADKO D.An assessment of the effect of chemical scavenging within submarine hydrothermal plumes upon ocean geochemistry[J].Earth Planet Sci Lett,1993,(120):361～374.

OKUBO A.Ocean diffusion diagrams[J].Deep-Sea Res,1971,(18):789～802.

AONO T,YAMADA M,NARITA H.Polonium-210 and lead-210 distributions in the Okinawa Trough and the East Chirna SCa[A].Global Fluxes of Carbon and Its Related Substances in the Coastal Sea-Ocean-Atmosphere System[A].Pro-ceedings of the 1994 Sapporo IGBP Symposium[C].Zapporo,Hokkaido University,1994.232～237.

NOZAKI Y,IKUTA N,YASHIMA M.Unusually large ²¹⁰po deficiencies relative to ²¹⁰pb in the Kuroshio Current of the East China and Philippine Seas[J].J Geophys Res,1990,(95):5 321～5 329.

NOZAKI Y,TSUBOTA H,KASEMSUPAYA V,et al.Residence time of surface water and panicle-reactive ²¹⁰pb and²¹⁰po in the East China and Yellow Seas[J].Geochimi Cosmochimi Acta,1991,(55):1 265～1 272.

KADKO D,BACON M P,HUDSON A.Enhanced scavenging of ²¹⁰pb and ²¹⁰po by processes associated with the East Pacific Rise near 8°45'N[J].Earth Planet Sci Lett,1986/87,(81):349～357.

YAMADA M,AONO T,NARITA H.²¹⁰pb in settling particles on the East China Sea continental margin:the 1993～1994 MASFLEX[A].Global Fluxes of Carbon and Its Related Substances in the Coastal Sea-Ocean-Atmosphere System.Proceedings of the 1994 Sapporo IGBP Symposium[C].Hokkaido University,1994.226～231.

TSUNOGAI S,SHINAGAWA T,KURATA T.Deposition of anthropogenic sulfate and lead-210 in the western North Pacific area[J].Geochem J,1985,(19):77～90.

SHENG Z,KURODA P K.Atmospheric injections of polonium-210 from the recent volcanic eruptions[J].Geochem J,1985,(19):1～10.

WEI Ching-ling,MURRAY J W.The behavior of scavenged isotopes in marine anoxic environments:²¹⁰pb and ²¹⁰po in the water column of the Black Sea[J].Geochimi Cosmochimi Acta,1994,(58):1 795～1 811.

HARADA K,BURNETT W,LAROCK P.Polonium in Florida groundwater and its possible relationship to the sulfur cycle and bacteria[J].Geochimi Cosmochimi Acta,1989,(53):143～150.

BLAIR N E,ALLER C R.Anaerobic methane oxidation on the Amazon shelf[J].Geochimi Cosmochimi Acta,1995,(59):3 707～3 715.

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