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- W4306175220 endingPage "104119" @default.
- W4306175220 startingPage "104119" @default.
- W4306175220 abstract "Exposure of buried source rocks at or near the surface causes organic matter (OM) to be subjected to loss through weathering impacts. A detailed organic and inorganic investigation of the natural weathering of the Triassic Chang 7 Yishicun Profile in Tongchuan City of the Ordos Basin revealed pronounced changes in bulk, molecular, mineral, and elemental compositions. In this study, systematic and visible variations caused by natural weathering were shown in the amount and composition of both organic (kerogen and extractable organic matter [EOM]) and inorganic matter (minerals and elements). The results indicate that natural weathering could substantially affect the characteristics of source rocks at a depth of 2 m from the surface, resulting in a 41% decrease in total organic carbon (TOC) and a 75% loss of EOM. Furthermore, changes were noted in kerogen elemental compositions, fractional compositions of EOM, and some geochemical parameters from Rock-Eval pyrolysis. The mineral and major, trace, and rare earth element (REE) compositions of the outcrop samples were also analysed and compared. The weathering of source rocks was mainly due to the influence of surface water leaching and biodegradation of the OM. This resulted in the oxidation of kerogen and the preferential depletion of low-carbon-number n-alkanes and low-molecular-weight high-water-solubility biomarkers. This has led to bias in petroleum geochemical interpretation based on these organic geochemical parameters. The major elemental composition indicated that the outcrop profile was moderately weathered. Moreover, some commonly used palaeoenvironmental geochemical proxies, including U/Th, AU, Mo, Sr/Ba, Sr/Cu, and P/Ti, display varying degrees of weathering-related alteration. However, other palaeoenvironmental proxies such as V/(V + Ni), Ni/Co, V/Cr, δU, and Ceanom experienced little variation and remained reliable for environmental interpretation. Thus, petroleum resource evaluation and sedimentary environmental analysis of source rocks based on outcrop samples should consider the effects of natural weathering." @default.
- W4306175220 created "2022-10-14" @default.
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- W4306175220 date "2022-11-01" @default.
- W4306175220 modified "2023-10-10" @default.
- W4306175220 title "Impact of natural weathering on source rocks: Organic and inorganic geochemical evidence from the Triassic Chang 7 outcrop profile in Tongchuan of the Southern Ordos Basin (China)" @default.
- W4306175220 cites W1618006206 @default.
- W4306175220 cites W177566315 @default.
- W4306175220 cites W1964337789 @default.
- W4306175220 cites W1967944540 @default.
- W4306175220 cites W1973603001 @default.
- W4306175220 cites W1975025622 @default.
- W4306175220 cites W1980585609 @default.
- W4306175220 cites W1982834627 @default.
- W4306175220 cites W1983641634 @default.
- W4306175220 cites W1984173122 @default.
- W4306175220 cites W1985799227 @default.
- W4306175220 cites W1988674472 @default.
- W4306175220 cites W1990565062 @default.
- W4306175220 cites W1991406010 @default.
- W4306175220 cites W1991662585 @default.
- W4306175220 cites W1992615240 @default.
- W4306175220 cites W1992797621 @default.
- W4306175220 cites W1995575035 @default.
- W4306175220 cites W1997054625 @default.
- W4306175220 cites W2003993190 @default.
- W4306175220 cites W2006081057 @default.
- W4306175220 cites W2008816187 @default.
- W4306175220 cites W2009839274 @default.
- W4306175220 cites W2012544636 @default.
- W4306175220 cites W2013134255 @default.
- W4306175220 cites W2014376482 @default.
- W4306175220 cites W2015876559 @default.
- W4306175220 cites W2016223358 @default.
- W4306175220 cites W2016645135 @default.
- W4306175220 cites W2020110632 @default.
- W4306175220 cites W2020228038 @default.
- W4306175220 cites W2029401070 @default.
- W4306175220 cites W2033647106 @default.
- W4306175220 cites W2036057044 @default.
- W4306175220 cites W2036501693 @default.
- W4306175220 cites W2037552439 @default.
- W4306175220 cites W2037741433 @default.
- W4306175220 cites W2038631041 @default.
- W4306175220 cites W2040890506 @default.
- W4306175220 cites W2040905190 @default.
- W4306175220 cites W2042526417 @default.
- W4306175220 cites W2045283300 @default.
- W4306175220 cites W2046716359 @default.
- W4306175220 cites W2048321874 @default.
- W4306175220 cites W2050670879 @default.
- W4306175220 cites W2056066783 @default.
- W4306175220 cites W2063486414 @default.
- W4306175220 cites W2066113289 @default.
- W4306175220 cites W2080382188 @default.
- W4306175220 cites W2083645617 @default.
- W4306175220 cites W2084956055 @default.
- W4306175220 cites W2085577225 @default.
- W4306175220 cites W2092464961 @default.
- W4306175220 cites W2103850880 @default.
- W4306175220 cites W2106191028 @default.
- W4306175220 cites W2127888210 @default.
- W4306175220 cites W2152266916 @default.
- W4306175220 cites W2183438122 @default.
- W4306175220 cites W2460069070 @default.
- W4306175220 cites W2522415461 @default.
- W4306175220 cites W2566641241 @default.
- W4306175220 cites W2589010134 @default.
- W4306175220 cites W2671517711 @default.
- W4306175220 cites W2735319444 @default.
- W4306175220 cites W2754338645 @default.
- W4306175220 cites W2809526442 @default.
- W4306175220 cites W2810624205 @default.
- W4306175220 cites W2884238973 @default.
- W4306175220 cites W2947332269 @default.
- W4306175220 cites W2966871740 @default.
- W4306175220 cites W2988331615 @default.
- W4306175220 cites W3091297144 @default.
- W4306175220 cites W3094623918 @default.
- W4306175220 cites W3133381654 @default.
- W4306175220 cites W3186982353 @default.
- W4306175220 cites W3197254355 @default.
- W4306175220 cites W4214908582 @default.
- W4306175220 cites W4220711258 @default.
- W4306175220 cites W4221016275 @default.
- W4306175220 cites W4238032652 @default.
- W4306175220 cites W4376848435 @default.
- W4306175220 cites W594987929 @default.
- W4306175220 doi "https://doi.org/10.1016/j.coal.2022.104119" @default.
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