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• W3091081718 endingPage "104740" @default.
• W3091081718 startingPage "104740" @default.
• W3091081718 abstract "Organic-rich Mesoproterozoic rocks from the Xiamaling and Hongshuizhuang formations, with a moderate thermal maturity within the oil window, are well preserved in the Yanliao Rift, Northern China. Their organic geochemical compositions, especially biomarkers, organic matter origin, and depositional environment, are discussed in detail using GC, GC–MS and GC-MS-MS techniques. The results indicate that the Xiamaling and Hongshuizhuang samples share similar molecular compositions, which are distinct from those of Phanerozoic bitumens, suggesting a unique microflora in the North China sea during the Middle Mesoproterozoic (1.45–1.30 Gyr). The biomarkers in the saturated fraction were dominated by 13α(n-alkyl)-tricyclic terpanes (13αNATTs) and drimanes. The 13αNATTs appeared to be diagnostic biomarkers for special, ancient microbes in the Proterozoic, as they were only detected in Meso–Neoproterozoic bitumens and were absent in Phanerozoic sequences. Abundant drimane series, including extended drimanes, may be sourced from the ring C cleavage of 13αNATTs or may directly originate from the same precursor of 13αNATTs, based on the observation that the concentrations of drimanes and 13αNATTs exhibited a good correlation. Elevated C19 and C20 regular tricyclic terpanes together with abundant rearranged hopanes, which are usually typical fingerprints for terrestrial rocks, are distinct features of the Xiamaling and Hongshuizhuang marine rock samples. These compounds are considered to be derived from unique prokaryotes that were present in the Mesoproterozoic sea, which could synthesize abundant precursors of rearranged hopanes and low molecular tricyclic terpanes. Pristane (Pr) and phytane (Ph), mainly originated from the phytol side-chain of chlorophyll, were only present in very low abundances, even in the low maturity and organic-rich Xiamaling oil shales (total organic carbon >20%). This may indicate a contribution of phototrophs with other molecular proxies, rather than phytanic lipids in their chlorophylls. An absence or trace amounts of steranes in the samples may reveal a low contribution of eukaryotes, although previous studies have found a wide occurrence of eukaryotes in the Xiamaling and Hongshuizhuang formations, as well as in even more ancient rocks in the Yanliao Rift. Low Pr/Ph ratio values (<1.0), together with an absence of dibenzothiophenes and aryl isoprenoids, may indicate a common anoxic environment with relatively low sulfate concentrations and a low contribution of green sulfur bacteria. Several maturity indictors, such as Tmax, C31 22 S/(22 S + 22 R), and the methylphenanthrene index, all suggest an early oil-window thermal maturity for the Xiamaling rocks and a middle oil-window maturity for the Hongshuizhuang rocks." @default.
• W3091081718 created "2020-10-08" @default.
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• W3091081718 date "2021-01-01" @default.
• W3091081718 modified "2023-10-09" @default.
• W3091081718 title "Organic geochemical compositions of Mesoproterozoic source rocks in the Yanliao Rift, Northern China" @default.
• W3091081718 cites W1532877896 @default.
• W3091081718 cites W1651310461 @default.
• W3091081718 cites W1689399105 @default.
• W3091081718 cites W1825230519 @default.
• W3091081718 cites W1832379973 @default.
• W3091081718 cites W1965733786 @default.
• W3091081718 cites W1967685912 @default.
• W3091081718 cites W1971877611 @default.
• W3091081718 cites W1972565144 @default.
• W3091081718 cites W1972934330 @default.
• W3091081718 cites W1974647374 @default.
• W3091081718 cites W1975025622 @default.
• W3091081718 cites W1979591257 @default.
• W3091081718 cites W1982039369 @default.
• W3091081718 cites W1984455569 @default.
• W3091081718 cites W1987453916 @default.
• W3091081718 cites W1996173391 @default.
• W3091081718 cites W1997338331 @default.
• W3091081718 cites W2003977190 @default.
• W3091081718 cites W2005402300 @default.
• W3091081718 cites W2005547952 @default.
• W3091081718 cites W2006099397 @default.
• W3091081718 cites W2010330136 @default.
• W3091081718 cites W2011627077 @default.
• W3091081718 cites W2012527313 @default.
• W3091081718 cites W2013622995 @default.
• W3091081718 cites W2019017997 @default.
• W3091081718 cites W2025977109 @default.
• W3091081718 cites W2027166815 @default.
• W3091081718 cites W2030278671 @default.
• W3091081718 cites W2032247127 @default.
• W3091081718 cites W2038635945 @default.
• W3091081718 cites W2039074563 @default.
• W3091081718 cites W2039126445 @default.
• W3091081718 cites W2043732268 @default.
• W3091081718 cites W2052639207 @default.
• W3091081718 cites W2053080324 @default.
• W3091081718 cites W2054408487 @default.
• W3091081718 cites W2055499138 @default.
• W3091081718 cites W2058299364 @default.
• W3091081718 cites W2060642984 @default.
• W3091081718 cites W2062333818 @default.
• W3091081718 cites W2063219992 @default.
• W3091081718 cites W2064745072 @default.
• W3091081718 cites W2064775977 @default.
• W3091081718 cites W2065177004 @default.
• W3091081718 cites W2065516237 @default.
• W3091081718 cites W2066337770 @default.
• W3091081718 cites W2067739078 @default.
• W3091081718 cites W2068943520 @default.
• W3091081718 cites W2074893099 @default.
• W3091081718 cites W2076516921 @default.
• W3091081718 cites W2076629777 @default.
• W3091081718 cites W2080471464 @default.
• W3091081718 cites W2086628355 @default.
• W3091081718 cites W2089194183 @default.
• W3091081718 cites W2090122760 @default.
• W3091081718 cites W2093217142 @default.
• W3091081718 cites W2093561073 @default.
• W3091081718 cites W2095567465 @default.
• W3091081718 cites W2110407146 @default.
• W3091081718 cites W2122842112 @default.
• W3091081718 cites W2128712155 @default.
• W3091081718 cites W2133159913 @default.
• W3091081718 cites W2147564739 @default.
• W3091081718 cites W2151853202 @default.
• W3091081718 cites W2162344545 @default.
• W3091081718 cites W2170886436 @default.
• W3091081718 cites W2286041863 @default.
• W3091081718 cites W2355920534 @default.
• W3091081718 cites W2396542812 @default.
• W3091081718 cites W2552625743 @default.
• W3091081718 cites W2592388179 @default.
• W3091081718 cites W2592585863 @default.
• W3091081718 cites W2599241403 @default.
• W3091081718 cites W2610144908 @default.
• W3091081718 cites W2749763761 @default.
• W3091081718 cites W2754752737 @default.
• W3091081718 cites W2758226547 @default.
• W3091081718 cites W2773577625 @default.
• W3091081718 cites W2902442689 @default.
• W3091081718 cites W2902724361 @default.
• W3091081718 cites W2966304699 @default.
• W3091081718 cites W2969775820 @default.
• W3091081718 doi "https://doi.org/10.1016/j.marpetgeo.2020.104740" @default.
• W3091081718 hasPublicationYear "2021" @default.
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