Chemical variation from biolipids to sedimentary organic matter in modern oceans and its implication to the geobiological evaluation of ancient hydrocarbon source rocksChemical variation from biolipids to sedimentary organic matter in modern oceans and its implication to the geobiological evaluation of ancient hydrocarbon source rocks

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 Author Wang, Hongmei ♦ Ma, Xiangru ♦ Liu, Deng ♦ Yang, Xiaofen ♦ Li, Jihong Source SpringerLink Content type Text Publisher Higher Education Press File Format PDF Copyright Year ©2007 Language English
 Subject Domain (in DDC) Natural sciences & mathematics ♦ Earth sciences ♦ Geology, hydrology & meteorology Subject Keyword modern oceans ♦ productivity ♦ biochemicals ♦ biofilm ♦ sedimentary organic matter ♦ hydrocarbon source rocks ♦ Geosciences Abstract Understanding the dynamics of organic matter in modern marine water columns greatly favors the geobiological evaluation of hydrocarbon source rocks. Biolipids could make great contribution to petroleum hydrocarbons due to their comparable chemical components and the slightly refractory characteristics of biolipids during the microbial/thermal degradation. A variety of environmental factors such as temperature, CO$_{2}$ and salinity could affect the biochemical contents in microorganisms. As a result, microorganisms living in a changing environmental condition might have a different contribution to the petroleum formation. Organic carbon flux is shown to bear a positive correlation with the primary productivity only within a certain range of biomass volumes in a specific biohabitat. Furthermore, organic matter is degraded much quickly in a water column with oxic conditions. Therefore, the anoxic condition, along with the enhanced biological productivity, would be one of the significant factors in the formation of high-quality hydrocarbon source rocks. The formation of biofilms and microbial mats favors the preservation of sedimentary organic matter by decreasing the degradation rate of organic matter. Identification of biofilms and microbial mats in sedimentary rocks will thus greatly help to understand the depositional processes of organic matter finally preserved in hydrocarbon source rocks. ISSN 16737385 Age Range 18 to 22 years ♦ above 22 year Educational Use Research Education Level UG and PG Learning Resource Type Article Publisher Date 2007-01-01 Publisher Institution Chinese Universities Publisher Place Beijing e-ISSN 16737490 Journal Frontiers of Earth Science in China Volume Number 1 Issue Number 4 Page Count 6 Starting Page 399 Ending Page 404