Research output: Contribution to journal › Article › peer-review
Petroleum-related hydrocarbons in deep and subsurface sediments from South-Western Barents Sea. / Boitsov, Stepan; Petrova, Vera; Jensen, Henning K B; Kursheva, Anna; Litvinenko, Ivan; Chen, Yifeng; Klungsøyr, Jarle.
In: Marine Environmental Research, Vol. 71, No. 5, 01.06.2011, p. 357-368.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Petroleum-related hydrocarbons in deep and subsurface sediments from South-Western Barents Sea
AU - Boitsov, Stepan
AU - Petrova, Vera
AU - Jensen, Henning K B
AU - Kursheva, Anna
AU - Litvinenko, Ivan
AU - Chen, Yifeng
AU - Klungsøyr, Jarle
PY - 2011/6/1
Y1 - 2011/6/1
N2 - Subsurface sediments from a pockmark area in South-Western Barents Sea have been earlier found to contain elevated levels of petroleum-related polycyclic aromatic hydrocarbons. This work describes a comprehensive analysis of various biomarkers, including the highly source-specific hopanes, in a 4.5 m long gravity core from the same area, together with subsurface sediment samples from other areas in the region without pockmarks present (" background samples"). A clear difference between the pockmark gravity core and the background sediment cores was found, both with regard to genesis and the level of transformation of organic matter. A number of indicator parameters, such as methylphenanthrene index (MPI-1), point towards a significantly higher maturity of hydrocarbons in the pockmark core throughout its length as compared to the other sampled locations. Higher contents of microbial hopanoids (hopenes) may indicate the former presence of petroleum. These findings confirm the hypothesis of a natural hydrocarbon source in the deeper strata present in the studied location with pockmarks.
AB - Subsurface sediments from a pockmark area in South-Western Barents Sea have been earlier found to contain elevated levels of petroleum-related polycyclic aromatic hydrocarbons. This work describes a comprehensive analysis of various biomarkers, including the highly source-specific hopanes, in a 4.5 m long gravity core from the same area, together with subsurface sediment samples from other areas in the region without pockmarks present (" background samples"). A clear difference between the pockmark gravity core and the background sediment cores was found, both with regard to genesis and the level of transformation of organic matter. A number of indicator parameters, such as methylphenanthrene index (MPI-1), point towards a significantly higher maturity of hydrocarbons in the pockmark core throughout its length as compared to the other sampled locations. Higher contents of microbial hopanoids (hopenes) may indicate the former presence of petroleum. These findings confirm the hypothesis of a natural hydrocarbon source in the deeper strata present in the studied location with pockmarks.
KW - Alkanes
KW - Barents sea
KW - Biomarkers
KW - Hopanes
KW - PAH
KW - Pockmarks
KW - Sediments
UR - http://www.scopus.com/inward/record.url?scp=79957966153&partnerID=8YFLogxK
U2 - 10.1016/j.marenvres.2011.04.003
DO - 10.1016/j.marenvres.2011.04.003
M3 - Article
C2 - 21601919
AN - SCOPUS:79957966153
VL - 71
SP - 357
EP - 368
JO - Marine Environmental Research
JF - Marine Environmental Research
SN - 0141-1136
IS - 5
ER -
ID: 36879183