Compositional feature of n-alkanes in modern sediment from the Changjiang Estuary and adjacent area and its implication to transport and distribution of organic carbon

ZHU Chun; PAN Jian-ming; LU Bing; HU Chuan-yu; LUI Xiao-ya; YE Xin-rong; XU Bin

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Article Navigation > Haiyang Xuebao > 2005 > 27(4): 59-67

ZHU Chun, PAN Jian-ming, LU Bing, HU Chuan-yu, LUI Xiao-ya, YE Xin-rong, XU Bin. Compositional feature of n-alkanes in modern sediment from the Changjiang Estuary and adjacent area and its implication to transport and distribution of organic carbon[J]. Haiyang Xuebao, 2005, 27(4): 59-67.

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Compositional feature of n-alkanes in modern sediment from the Changjiang Estuary and adjacent area and its implication to transport and distribution of organic carbon

1.
Laboratory of Marine Ecosystem and Biogeochemistry of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration Hangzhou 310012, China
2.
Laboratory of Marine Ecosystem and Biogeochemistry of State Oceanic Administration, Hangzhou 310012, China

Received Date: 2004-08-26
Rev Recd Date: 2005-03-30

Abstract

Abstract

Concentration and composition feature of n-alkanes in modern sediments from the Chang jiang Estuary and adjacent area are reported.Factor statistical analysis method is used to study the source of n-alkanes.The result shows that n-alkanes distribution patterns are charact erized by three modes:the beside peak mode which indicates abundant of terrest rial plant origin,dual peaks mode indicating both terrestrial plant and marine biological input and petroleum contamination mode.The chromatogram proxies mutation of n-alkanes in border the stations of at Changjiang Estuary is the objective reflection of sediment diversity resulting from two types of different water masses.Relationship between E n-Alk and TOC retains a postcor relation at all stations except P4,and TER-Alk,PL-1 and CPI are all highly correlated to the distance at the ZJ section.Factor statistical analysis reveals 4 types of input,among those the contribution of ter restrial plantinput is the largest one(51.5%),and among the terrestrial plantinputs the contribution of the Changjiang River discharge is the largest one(49.1%).In terms of diversity of factor load,it is supposed that the sedimentaryorganic matter in the area of middle-northern East China Sea is mostly trans-ported from North Jiangsu Province Coast and the old Huanghe River subaqueus delta,but a majority of sedimentary organic matter in Okinawa Trough may be come from Changjiang River and the inner shelf of East China Sea,and then its migration mechanism is discussed.
- n-alkanes,
- distribution curve,
- PN section,
- transport,
- sediment framework

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References(38)

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