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• W2040712874 abstract "The extractable organic matter of organic-rich black shales and associated organic-poor bioturbated green/gray shales of the Illinois and Michigan Basins of North America is analyzed to constrain the water column structure during their deposition. All black shale samples contain derivatives of the biomarker isorenieratene, a diaromatic carotenoid pigment produced exclusively by the brown strain of the green sulfur bacteria Chlorobiaceae. Chlorobiaceae are phototrophic organisms requiring euxinic (anoxic and sulfidic) conditions to survive, and the presence of isorenieratene derivatives indicates that the Middle Devonian–Early Mississippian epeiric seas of North America experienced bottom water euxinic conditions during black shale deposition. Analysis of green/gray shales also reveals the presence of isorenieratene derivatives, and in some cases isorenieratane. The highly bioturbated fabric of these sediments indicates the presence of oxygen in bottom waters during their deposition. Thus, we suggest that short-term shoaling of the oxycline across the basin slope may have occurred during their deposition, though they were deposited predominantly under an oxygenated water column (i.e. above the chemocline). Most green/gray shales contain three pseudohomologous series of branched alkanes with quaternary substituted carbon atoms (BAQCs), which are absent in black shale samples. Recent studies suggest that BAQCs are produced by benthic chemoautotrophs dwelling at the redox boundary separating anoxic sediments from moderately oxygenated waters. Comparison of the biomarker content (i.e. regular isoprenoid, BAQCs) between black and green/gray shales indicates different sources of organic matter, and suggests that phytoplanktonic productivity in the upper water column was enhanced during black shale deposition. The results of this study indicate that the alternation of green/gray and black shales in these basins results from the vertical fluctuations of the chemocline. These fluctuations seem to be driven by changes in phytoplanktonic productivity. Our data, when associated to previous studies of other black shales from Canada and Europe confirm that photic zone euxinia was a widespread feature of low-latitude epeiric seas during the Middle Devonian–Lower Mississippian." @default.
• W2040712874 created "2016-06-24" @default.
• W2040712874 creator A5011589033 @default.
• W2040712874 creator A5065835532 @default.
• W2040712874 date "2004-12-02" @default.
• W2040712874 modified "2023-10-18" @default.
• W2040712874 title "Water column structure during deposition of Middle Devonian–Lower Mississippian black and green/gray shales of the Illinois and Michigan Basins: a biomarker approach" @default.
• W2040712874 cites W1512424692 @default.
• W2040712874 cites W1527967953 @default.
• W2040712874 cites W1578727128 @default.
• W2040712874 cites W1582953086 @default.
• W2040712874 cites W1595688191 @default.
• W2040712874 cites W1963603885 @default.
• W2040712874 cites W196769100 @default.
• W2040712874 cites W1973362940 @default.
• W2040712874 cites W1984455569 @default.
• W2040712874 cites W1988032282 @default.
• W2040712874 cites W1988508637 @default.
• W2040712874 cites W1992578419 @default.
• W2040712874 cites W1992713158 @default.
• W2040712874 cites W1995575035 @default.
• W2040712874 cites W1996173391 @default.
• W2040712874 cites W1996737329 @default.
• W2040712874 cites W1997338331 @default.
• W2040712874 cites W2000232244 @default.
• W2040712874 cites W2002013162 @default.
• W2040712874 cites W2003040848 @default.
• W2040712874 cites W2005029962 @default.
• W2040712874 cites W2005180850 @default.
• W2040712874 cites W2005897408 @default.
• W2040712874 cites W2006936617 @default.
• W2040712874 cites W2012619732 @default.
• W2040712874 cites W2015120871 @default.
• W2040712874 cites W2020029114 @default.
• W2040712874 cites W2020037695 @default.
• W2040712874 cites W2027235364 @default.
• W2040712874 cites W2031811664 @default.
• W2040712874 cites W2032752559 @default.
• W2040712874 cites W2036403030 @default.
• W2040712874 cites W2037451857 @default.
• W2040712874 cites W2040164579 @default.
• W2040712874 cites W2050130572 @default.
• W2040712874 cites W2052902538 @default.
• W2040712874 cites W2054829011 @default.
• W2040712874 cites W2060624339 @default.
• W2040712874 cites W2061418079 @default.
• W2040712874 cites W2063373558 @default.
• W2040712874 cites W2071758215 @default.
• W2040712874 cites W2077005422 @default.
• W2040712874 cites W2077671227 @default.
• W2040712874 cites W2081893898 @default.
• W2040712874 cites W2084267339 @default.
• W2040712874 cites W2084956055 @default.
• W2040712874 cites W2085333407 @default.
• W2040712874 cites W2085719400 @default.
• W2040712874 cites W2086766760 @default.
• W2040712874 cites W2088690616 @default.
• W2040712874 cites W2089627450 @default.
• W2040712874 cites W2092866807 @default.
• W2040712874 cites W2095568839 @default.
• W2040712874 cites W2101438146 @default.
• W2040712874 cites W2108200189 @default.
• W2040712874 cites W2110157365 @default.
• W2040712874 cites W2115150095 @default.
• W2040712874 cites W2124850172 @default.
• W2040712874 cites W2127402307 @default.
• W2040712874 cites W2129110530 @default.
• W2040712874 cites W2130241233 @default.
• W2040712874 cites W2140264363 @default.
• W2040712874 cites W2144093401 @default.
• W2040712874 cites W2148669846 @default.
• W2040712874 cites W2161013576 @default.
• W2040712874 cites W2198612649 @default.
• W2040712874 cites W2224731340 @default.
• W2040712874 cites W2229437147 @default.
• W2040712874 cites W2237253932 @default.
• W2040712874 cites W2271059111 @default.
• W2040712874 cites W239126910 @default.
• W2040712874 cites W241260329 @default.
• W2040712874 cites W2473152502 @default.
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• W2040712874 cites W3214948090 @default.
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• W2040712874 doi "https://doi.org/10.1016/s0031-0182(04)00452-3" @default.
• W2040712874 hasPublicationYear "2004" @default.
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