Biogeography in 231Pa/230Th ratios and a balanced 231Pa budget for the Pacific Ocean
作者： Christopher T. Hayes , Robert F. Anderson , Martin Q. Fleisher , Sascha Serno , Gisela Winckler
DOI: 10.1016/J.EPSL.2014.02.001
关键词:
摘要: The ratio of unsupported protactinium-231 to thorium-230 in marine sediments, (Pa/Th)xs, is potentially sensitive several processes oceanographic and climatological interest: deep ocean circulation, biological productivity (as it relates total particle flux) composition (specifically, biogenic opal authigenic Mn). In order attribute variations (Pa/Th)xs observed sediment records changes specific through time, a better understanding the chemical cycling these elements modern necessary. To this end, survey was undertaken surface sediments from subarctic Pacific (SO202-INOPEX expedition) combination with Pacific-wide compilation published data. Throughout Pacific, robustly correlated content sediments. North equatorial simultaneous positive correlations indicators suggest that boundary scavenging combine enhance removal Pa eastern Pacific. Deep water mass ageing (>3.5 km>3.5 km) associated overturning appears play secondary role determining basin scale distribution (Pa/Th)xs. A basin-wide extrapolation performed which suggests budget nearly balance. We hypothesize time distributions could define evolving boundaries contrasting biogeographic provinces while influence hydrothermal confounds approach South
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H.J. Walter, M.M. Rutgers van der Loeff, H. Hoeltzen, Enhanced scavenging of 231Pa relative to 230Th in the South Atlantic south of the Polar Front: Implications for the use of the 231Pa/230Th ratio as a paleoproductivity proxy Earth and Planetary Science Letters. ,vol. 149, pp. 85- 100 ,(1997) , 10.1016/S0012-821X(97)00068-X
Teh-Lung Ku, Wallace S. Broecker, Radiochemical studies on manganese nodules of deep-sea origin Deep Sea Research and Oceanographic Abstracts. ,vol. 16, pp. 625- 637 ,(1969) , 10.1016/0011-7471(69)90063-1
C.R German, S Colley, M.R Palmer, A Khripounoff, G.P Klinkhammer, Hydrothermal plume-particle fluxes at 13°N on the East Pacific Rise Deep Sea Research. ,vol. 49, pp. 1921- 1940 ,(2002) , 10.1016/S0967-0637(02)00086-9
M.Q Fleisher, R.F Anderson, Assessing the collection efficiency of Ross Sea sediment traps using 230Th and 231Pa Deep-sea Research Part Ii-topical Studies in Oceanography. ,vol. 50, pp. 693- 712 ,(2003) , 10.1016/S0967-0645(02)00591-X
Yong Lao, Robert F Anderson, Wallace S Broecker, Hansjakob J Hofmann, Willy Wolfli, Particulate fluxes of 230Th, 231Pa, and 10Be in the northeastern Pacific Ocean Geochimica et Cosmochimica Acta. ,vol. 57, pp. 205- 217 ,(1993) , 10.1016/0016-7037(93)90479-G
J.-M. Gherardi, Y. Luo, R. Francois, J. F. McManus, S. E. Allen, L. Labeyrie, Reply to comment by S. Peacock on “Glacial-interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region” Paleoceanography. ,vol. 25, ,(2010) , 10.1029/2009PA001867
J.H. Chen, R. Lawrence Edwards, G.J. Wasserburg, 238U,234U and232Th in seawater Earth and Planetary Science Letters. ,vol. 80, pp. 241- 251 ,(1986) , 10.1016/0012-821X(86)90108-1
Celia Venchiarutti, Michiel Rutgers van der Loeff, Ingrid Stimac, Scavenging of 231Pa and thorium isotopes based on dissolved and size-fractionated particulate distributions at Drake Passage (ANTXXIV-3) Deep-sea Research Part Ii-topical Studies in Oceanography. ,vol. 58, pp. 2767- 2784 ,(2011) , 10.1016/J.DSR2.2010.10.040
Yoshiyuki Nozaki, Han-Soeb Yangt, Th and Pa isotopes in the waters of the Western Margin of the Pacific near Japan: evidence for release of 228Ra and 227Ac from slope sediments Journal of the Oceanographical Society of Japan. ,vol. 43, pp. 217- 227 ,(1987) , 10.1007/BF02109817
L. D. Keigwin, North Pacific deep water formation during the latest glaciation Nature. ,vol. 330, pp. 362- 364 ,(1987) , 10.1038/330362A0