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作者（2019）在《Geochemical Characteristics of Saturated Hydrocarbons from Strata Inferred from the Multitubular Cores of the Prydz Bay and the Sources/Environmental Variations》一文中研究指出：The content and distribution of saturated hydrocarbons（n-alkanes,isoprenoid,steranes and terpanes） in the multitubular cores ANT29-M2 from the Prydz Bay of the Antarctic were analyzed using gas chromatography-mass spectrometry,and the organic matter sources,sedimentary environments and geochemical parameters of the sediments were discussed. The results showed that the carbon number of the multitubular samples ANT29-M2 was between C14 and C32 with low-carbon single peak group and main peak carbon of C18. n-alkane gas charomatography fingerprint spectra indicated that unmixable complex compounds displayed a significant bulge,and the obvious UCM shape suggested a large input of bacteria.The ∑C21-/∑C22+ values varied from 1. 82 to 3. 9,and C21+ C22/C28+ C29 values ranged from 1. 26 to 6. 30,indicating that the sedimentary organic matter mainly originated from marine algae. The CPI and OEP values varied from 1. 54 to 2. 29 and from 4. 48 to 4. 82,respectively,with a significant odd even predominance. Pr/Ph values ranged from 0. 34 to 0. 76,significantly smaller than 1,with a clear distribution of C29> C27> C（28） and C27> C29> C（28） for regular steranes and a V-shaped C29 predominance and C27 predominance. This indicated that the sedimentary organic matter in the Prydz Bay originated from a mixed marine/continental source,and was deposited under a strongly reducing environment. The maturity parameters of the sedimentary strata from the Prydz Bay displayed significant inconsistency. Geochemical parameters of hopane C3222 S/C32（22 S +22 R）and sterane C29αββ/（αββ + ααα） suggested a high maturity,but other geochemical parameters such as C29ααα20 S/C29ααα（20 S +20 R）,CPI and OEP reflected that those of columnar strata were within the range of modern marine sediments（lowly mature to immature）,probably resulting from the development of microorganisms.
Abstract
The content and distribution of saturated hydrocarbons（n-alkanes,isoprenoid,steranes and terpanes） in the multitubular cores ANT29-M2 from the Prydz Bay of the Antarctic were analyzed using gas chromatography-mass spectrometry,and the organic matter sources,sedimentary environments and geochemical parameters of the sediments were discussed. The results showed that the carbon number of the multitubular samples ANT29-M2 was between C14 and C32 with low-carbon single peak group and main peak carbon of C18. n-alkane gas charomatography fingerprint spectra indicated that unmixable complex compounds displayed a significant bulge,and the obvious UCM shape suggested a large input of bacteria.The ∑C21-/∑C22+ values varied from 1. 82 to 3. 9,and C21+ C22/C28+ C29 values ranged from 1. 26 to 6. 30,indicating that the sedimentary organic matter mainly originated from marine algae. The CPI and OEP values varied from 1. 54 to 2. 29 and from 4. 48 to 4. 82,respectively,with a significant odd even predominance. Pr/Ph values ranged from 0. 34 to 0. 76,significantly smaller than 1,with a clear distribution of C29> C27> C（28） and C27> C29> C（28） for regular steranes and a V-shaped C29 predominance and C27 predominance. This indicated that the sedimentary organic matter in the Prydz Bay originated from a mixed marine/continental source,and was deposited under a strongly reducing environment. The maturity parameters of the sedimentary strata from the Prydz Bay displayed significant inconsistency. Geochemical parameters of hopane C3222 S/C32（22 S +22 R）and sterane C29αββ/（αββ + ααα） suggested a high maturity,but other geochemical parameters such as C29ααα20 S/C29ααα（20 S +20 R）,CPI and OEP reflected that those of columnar strata were within the range of modern marine sediments（lowly mature to immature）,probably resulting from the development of microorganisms.
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