Radiocarbon ages of different fractions of peat on coastal lowland of Bohai Bay: marine influence? -- Journal of Oceanology and Limnology,2018,36(5):1562-1569

	Cite this paper:
	SHANG Zhiwen, WANG Fu, FANG Jing, LI Jianfen, CHEN Yongsheng, JIANG Xingyu, TIAN Lizhu, WANG Hong. Radiocarbon ages of different fractions of peat on coastal lowland of Bohai Bay: marine influence?[J]. Journal of Oceanology and Limnology, 2018, 36(5): 1562-1569

Radiocarbon ages of different fractions of peat on coastal lowland of Bohai Bay: marine influence?

SHANG Zhiwen^1,2, WANG Fu^1,2, FANG Jing³, LI Jianfen^1,2, CHEN Yongsheng^1,2, JIANG Xingyu^1,2, TIAN Lizhu^1,2, WANG Hong^1,2

1 Tianjin Centre, China Geological Survey(CGS), Tianjin 300170, China;
2 Key Laboratory of Muddy Coast Geoenvironment, CGS, Tianjin 300170, China;
3 College of Urban and Environment Science, Tianjin Normal University, Tianjin 300387, China

Abstract:

Peat in boreholes is the most important ¹⁴C dating material used for constructing age framework. 20 bulk peat samples were collected from five boreholes, the ¹⁴C ages of two fractions (organic sediment fraction and peat fraction) of the bulk peat samples were investigated by AMS-dating and which fraction is better to help construct an age framework for the boreholes were compared and discussed. The results indicated that the peat fraction give a good dating results sequence in the boreholes, compared with the corresponding organic sediment fraction. And the dating results of organic sediment fraction show 161-6 702 years older than corresponding peat fraction, which was caused by marine influence. Then, we suggest an experience formula as y=0.99x-466.5 by the correlation analysis for correcting the marine influenced organic sediment ages within the conventional ages between 4 000 to 9 000 yrs BP, and more study should be carried out for the AMS ¹⁴C dating of the bulk organic sediments.

Key words: coastal lowland of Bohai Bay|peat fraction|organic sediment fraction|AMS ¹⁴C dating|marine influence

Received: 2017-03-30 Revised:

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Articles by SHANG Zhiwen

Articles by WANG Fu

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Articles by LI Jianfen

Articles by CHEN Yongsheng

Articles by JIANG Xingyu

Articles by TIAN Lizhu

Articles by WANG Hong

References:
Bartley D D, Chambers C. 1992. A pollen diagram, radiocarbon ages and evidence of agriculture on Extwistle Moor, Lancashire. New Phytologist, 121(2):311-320.
Blaauw M, van der Plicht J, van Geel B. 2004. Radiocarbon dating of bulk peat samples from raised bogs:nonexistence of a previously reported ‘reservoir effect’? Quaternary Science Reviews, 23(14-15):1 573-1 542.
Brock F, Lee S, Housley R A, Ramsey C B. 2011. Variation in the radiocarbon age of different fractions of peat:a case study from Ahrenshöft, northern Germany. Quaternary Geochronology, 6(6):550-555.
Cook G T, Dugmore A J, Shore J S. 1998. The influence of pretreatment on humic acid yield and ¹⁴C age of Carex peat. Radiocarbon, 40(1):21-27.
Gulliksen S, Birks H H, Possnert G, Mangerud J. 1998. A calendar age estimate of the younger Dryas-Holocene boundary at Kråkenes, western Norway. The Holocene, 8(3):249-259.
Hammond A P, Goh K M, Tonkin P J, Manning M R. 1991. Chemical pretreatments for improving the radiocarbon dates of peats and organic silts in a gley podzol environment:Grahams Terrace, North Westland. New Zealand Journal of Geology and Geophysics, 34(2):191-194.
Johnson R H, Tallis J H, Wilson P. 1990. The seal edge coombes, North Derbyshire-a study of their erosional and depositional history. Journal of Quaternary Science, 5(1):83-94.
Nilsson M, Klarqvist M, Bohlin E, Possnert G. 2001. Variation in ¹⁴C age of macrofossils and different fractions of minute peat samples dated by AMS. The Holocene, 11(5):579-586.
Reimer P J, Bard E, Bayliss A, Beck J W, Blackwell P G, Bronk Ramsey C, Buck C E, Cheng H, Edwards R L, Friedrich M, Grootes P M, Guilderson T P, Haflidason H, Hajdas I, Hatté C, Heaton T J, Hoffmann D L, Hogg A G, Hughen K A, Kaiser K F, Kromer B, Manning S W, Niu M, Reimer R W, Richards D A, Scott E M, Southon J R, Staff R A, Turney C S M, van der Plicht J. 2013. Intcal13 and Marine13 radiocarbon age calibration curves 0-50,000 years Cal BP. Radiocarbon, 55(4):1 869-1 887.
Shore J S, Bartley D D, Harkness D D. 1995. Problems encountered with the ¹⁴C dating of peat. Quaternary Science Reviews, 14(4):373-383.
Southon J, Kashgarian M, Fontugne M, Metivier B, Yim W W S. 2002. Marine reservoir corrections for the Indian Ocean and Southeast Asia. Radiocarbon, 44(1):167-180.
Törnqvist T, de Jong A F M, Oosterbaan W A, van der Borg K. 1992. Accurate dating of organic deposits by AMS ¹⁴C measurement of macrofossils. Radiocarbon, 34(3):566-577.
Waddington J M, Roulet N T. 1997. Groundwater flow and dissolved carbon movement in a boreal peatland. Journal of Hydrology, 191(1-4):122-138.
Waller M P, Long A J, Schofield J E. 2006. Interpretation of radiocarbon dates from the upper surface of late-Holocene peat layers in coastal lowlands. The Holocene, 16(1):51-61.
Williams J B. 1989. Examination of freshwater peat pretreatment methodology. Radiocarbon, 31(3):269-275.
Wüst R A J, Jacobsen G E, van der Gaast H, Smith A M. 2008. Comparison of radiocarbon ages from different organic fractions in tropical peat cores:insights from Kalimantan, Indonesia. Radiocarbon, 50(3):359-372.
Zhou W J, Lu X F, Wu Z K, Deng L, Jull A J T, Donahue D, Beck W. 2002. Peat record reflecting Holocene climatic change in the Zoige Plateau and AMS radiocarbon dating. Chinese Science Bulletin, 47(1):66-70.