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doi:10.2204/iodp.proc.301.203.2008

Data report: Pb isotope compositions of sediment from the eastern flank of Juan de Fuca Ridge¹

Takuroh Noguchi,² Ryuichi Shinjo,³ and Tamotsu Oomori⁴

Abstract

During Integrated Ocean Drilling Program Expedition 301 we collected sediment samples from the eastern flank (Holes U1301C and U1301D) of Juan de Fuca Ridge. During this expedition, the sediments were squeezed to collect pore water samples, which were analyzed for chemical compositions. The results of Pb isotope analyses on sediment squeezecake samples are presented in this report. The samples have Pb isotopic compositions similar to surface sediments from nearby regions but demonstrate wider variation in ²⁰⁶Pb/²⁰⁴Pb. In Pb-Pb isotope space, ratios form a trend subparallel to altered turbidites from the northern Juan de Fuca Ridge. The low ²⁰⁶Pb/²⁰⁴Pb end of the trend extends toward the seawater field.

¹Noguchi, T., Shinjo, R., and Oomori, T., 2008. Data report: Pb isotope compositions of sediment from the eastern flank of Juan de Fuca Ridge. In Fisher, A.T., Urabe, T., Klaus, A., and the Expedition 301 Scientists, Proc. IODP, 301: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.301.203.2008

²Graduate School of Engineering and Sciences, University of the Ryukyus, 1 Senbaru Nishihara, Okinawa, 903-0213, Japan
Present address: Department of Ocean Drilling Science Technical Support, Marine Works Japan, Ltd., 2-16-32 4F Kamariya-higashi, Kanazawa-ku, Yokohama 236-0042, Japan. noguchitk@mwj.co.jp

³Department of Physics and Earth Sciences, University of the Ryukyus, 1 Senbaru Nishihara, Okinawa 903-0213, Japan.

⁴Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, 1 Senbaru Nishihara, Okinawa 903-0213, Japan.

Initial receipt: 1 May 2008
Acceptance: 10 June 2008
Publication: 27 October 2008
MS 301-203

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