배기동
2018-02-05T02:04:22Z
2018-02-05T02:04:22Z
2015-10-14
QUATERNARY INTERNATIONAL, v. 384, Page. 4-12
1040-6182
1873-4553
http://www.sciencedirect.com/science/article/pii/S1040618215000348
http://hdl.handle.net/20.500.11754/35381
Carbon isotope of total organic carbon (delta C-13(org)) and long-chain n-alkanes, which are terrestrial plant biomarkers, and their compound-specific carbon isotope ratios (delta C-13(ALK)) were investigated in the sediment of the Jeongok-ri Paleolithic Site in central Korea to interpret changes in paleovegetation and paleoclimate. The delta C-13(org) ranged between approximately -24 parts per thousand and -27 parts per thousand, suggesting different organic matter sources. Relatively lighter delta C-13(org) occurred in lower part and the occurrence of heavier delta C-13(org) in upper part may indicate terrestrial C-3 plant dominance and/or a mixture of C-3 and C-4 plants, respectively. The patterns of n-alkane distribution were characterized by a continuous predominance of odd-numbered n-alkanes, particularly nC(29) and nC(31), and by variation in the distribution of evennumbered n-alkanes. Total concentration of n-alkanes and distributions of each number of n-alkanes are quite different over time, suggesting paleovegetation changes. The average chain length (ACL) and carbon preferences index (CPI) showed gradual variations with distinctive switching points at about 160 ka. This variation reflecting changes in paleovegetation type, is coincident with those of the delta C-13(org). Individual n-alkane isotopes, delta C-13(ALK), ranged between -18.64 parts per thousand and -38.09 parts per thousand, suggesting different sources of n-alkanes. Although some petrogenic sources of n-alkanes were possible, the distribution of n-alkanes and their delta C-13(ALK) support paleovegetation and paleoclimatic variations in Jeongok-ri Paleolithic site, Korea for the last 300 ka. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.
This research was part of the project titled "International Ocean Discovery Program (PM58300)" funded by the Ministry of Ocean and Fisheries, Korea. S.I Nam is supported by Basic Research Program (PE15062) of KOPRI. The authors kindly thank the anonymous reviewers. Special thanks are extended to Ms. SJ Kang for drafting the figures and for data arrangement.
en_US
PERGAMON-ELSEVIER SCIENCE LTD
Jeongok-ri
n-alkanes
Carbon isotope
Paleoclimatology
Paleovegetation
EAST-ASIAN MONSOON
LATE PLEISTOCENE
ORGANIC MATERIAL
CHINESE LOESS
JAPAN SEA
MAGNETIC-SUSCEPTIBILITY
QUATERNARY SEDIMENTS
MARINE-SEDIMENTS
CLIMATE
DISTRIBUTIONS
Paleovegetation and paleoclimate changes based on terrestrial n-alkanes and their carbon isotopes in sediment from the Jeongok-ri Paleolithic Site, Korea
Article
384
10.1016/j.quaint.2015.01.012
4-12
QUATERNARY INTERNATIONAL
Hyun, Sangmin
Suh, YJ
Shin, KH
Nam, SI
Chang, SW
Bae, Kidong
2015000939
E
COLLEGE OF LANGUAGES & CULTURES[E]
DEPARTMENT OF CULTURAL ANTHROPOLOGY
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