A possible terrigenous origin for perylene based on a sedimentary record of a pond (Lorraine, France)

被引:26
作者
Bertrand, O. [1 ,2 ]
Montarges-Pelletier, E. [3 ]
Mansuy-Huault, L. [3 ]
Losson, B. [4 ]
Faure, P. [3 ]
Michels, R. [1 ]
Pernot, A. [5 ]
Arnaud, F. [6 ]
机构
[1] Univ Lorraine, UMR CNRS Georessources 7566, F-54506 Vandoeuvre Les Nancy, France
[2] Univ Tours, EA GeHCO 6293, F-37200 Tours, France
[3] Univ Lorraine, UMR CNRS LIEC 7360, F-54501 Vandoeuvre Les Nancy, France
[4] EA 1105 CEGUM, F-57006 Metz 1, France
[5] ENSAIA INPL INRA LSE, F-57006 Vandoeuvre Les Nancy, France
[6] Univ Savoie, CNRS, EDYTEM, F-73373 Le Bourget Du Lac, France
关键词
POLYCYCLIC AROMATIC-HYDROCARBONS; ORGANIC-MATTER SOURCES; RECENT LAKE-SEDIMENTS; HYDROTHERMAL PETROLEUMS; FOSSIL WOOD; MARINE; STEROLS; BAY; GEOCHEMISTRY; PRECURSOR;
D O I
10.1016/j.orggeochem.2013.02.015
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The origin of perylene, a five-ring polycyclic aromatic hydrocarbon (PAH), in sediments has been a matter of constant debate and its formation mechanisms remain unclear. A perylene record in sediment was described and could support a clear link between perylene and terrigenous organic matter (OM) input. The distributions of PAHs, the variations of organic proxies such as the ratio of terrigenous to aquatic n-alkanes (TAR((HC))) and 5 alpha(H)-stanols/Delta(5)-sterols ratio in sediments have been investigated. Sediments were sampled from a pond artificially created during the Middle Ages from a swampy area. In the period prior to the pond creation, for which high contributions of terrigenous OM were evidenced, perylene was found to be the predominant PAH. Furthermore, perylene content was shown to increase in response to the establishment of more reducing conditions. This result supports the common idea that the main source of perylene is natural and derives from biogenic precursors under reducing conditions. The creation of the pond in this wetland is marked by the deposition of a wood rich level characterized both by more oxygenated conditions and higher concentrations of perylene. These high concentrations could result from the introduction of high concentrations of biogenic precursors of perylene under oxidative conditions. Subsequently, the progressive burial of the woody level could have allowed the establishment of oxygen depleted conditions and the formation of perylene. These results validate the use of perylene as a paleoenvironmental marker of terrigenous sources but it must be carefully used as a marker for syn- or post-depositional oxygen depleted conditions in lacustrine environments. (c) 2013 Elsevier Ltd. All rights reserved.
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收藏
页码:69 / 77
页数:9
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