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- W4382499595 abstract "Organoclastic sulfate reduction and bacterial sulfide oxidation have been suggested to explain the formation of authigenic carbonate and native sulfur replacing gypsum in the Lorca Basin, Spain. To gain more insight into the nature of this replacement, two types of sulfur-bearing carbonate (laminated and brecciated) from the late Miocene Lorca Basin were studied. Petrographic observations revealed that a sulfur-bearing laminated carbonate consists of clay-rich and dolomite-rich laminae with carbonate and native sulfur pseudomorphs after gypsum. Positive δ 18 O carbonate values in the laminae (δ 18 O = 2.6‰) and lipid biomarkers of halophilic archaea (e.g., extended archaeol) suggest formation under hypersaline conditions. Bacterial sulfate reduction, evidenced by biomarkers such as iso -C 15 , iso -C 16 , and iso -C 17 fatty acids, produced hydrogen sulfide inducing the abiotic formation of organic sulfur compounds. Gypsum in the laminated carbonate likely dissolved due to undersaturation as evidenced by a low content of carbonate-associated sulfate (3,668 ppm) and 34 S-enriched native sulfur (δ 34 S = 22.4‰), reflecting sulfate limitation. Such 34 S-enrichment implies limited fluid flow, which probably restricted the supply of molecular oxygen required for native sulfur formation through oxidation of hydrogen sulfide. Alternatively, sulfate-reducing bacteria may have mediated native sulfur formation directly as a stress response to environmental conditions. The formation of sulfur-bearing calcite in brecciated carbonates is due to post-depositional alteration. Negative δ 18 O values of the calcite (δ 18 O = −1.5‰) and a tenfold decrease in carbonate-associated sulfate content (752 ppm) suggest gypsum dissolution and subsequent calcite precipitation from meteoric water. Relatively 34 S-depleted native sulfur (δ 34 S = 13.1‰) leaves it ambiguous whether meteoric water influx could have supplied sufficient molecular oxygen for oxidation of hydrogen sulfide. In case of the brecciated carbonate, methanogenesis, anaerobic oxidation of methane, and bacterial sulfate reduction apparently mediated the formation of secondary minerals as indicated by 13 C-depleted lipid biomarkers representative for the respective metabolisms. This study reveals that the conditions and timing of gypsum replacement are variable–taking place 1) during or shortly after gypsum deposition or 2) significantly after sedimentation–and suggests that methanogens in addition to anaerobic methanotrophic archaea and sulfate-reducing bacteria may be involved in the mineral-forming processes in the sedimentary subsurface." @default.
- W4382499595 created "2023-06-30" @default.
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- W4382499595 date "2023-05-12" @default.
- W4382499595 modified "2023-10-14" @default.
- W4382499595 title "Two modes of gypsum replacement by carbonate and native sulfur in the Lorca Basin, SE Spain" @default.
- W4382499595 cites W1038103599 @default.
- W4382499595 cites W1492893180 @default.
- W4382499595 cites W1572968422 @default.
- W4382499595 cites W1612517152 @default.
- W4382499595 cites W1735445059 @default.
- W4382499595 cites W1752827203 @default.
- W4382499595 cites W1895649650 @default.
- W4382499595 cites W190250267 @default.
- W4382499595 cites W1914471426 @default.
- W4382499595 cites W1964703580 @default.
- W4382499595 cites W1964945480 @default.
- W4382499595 cites W1965143531 @default.
- W4382499595 cites W1966976771 @default.
- W4382499595 cites W1967482719 @default.
- W4382499595 cites W1967782998 @default.
- W4382499595 cites W1968716979 @default.
- W4382499595 cites W1970369939 @default.
- W4382499595 cites W1970767275 @default.
- W4382499595 cites W1972576751 @default.
- W4382499595 cites W1973024995 @default.
- W4382499595 cites W1974734367 @default.
- W4382499595 cites W1974924765 @default.
- W4382499595 cites W1979023513 @default.
- W4382499595 cites W1979756072 @default.
- W4382499595 cites W1979805238 @default.
- W4382499595 cites W1979870145 @default.
- W4382499595 cites W1981568222 @default.
- W4382499595 cites W1983885804 @default.
- W4382499595 cites W1984403993 @default.
- W4382499595 cites W1984575661 @default.
- W4382499595 cites W1985009426 @default.
- W4382499595 cites W1985144947 @default.
- W4382499595 cites W1985219735 @default.
- W4382499595 cites W1988249936 @default.
- W4382499595 cites W1989152605 @default.
- W4382499595 cites W1990162765 @default.
- W4382499595 cites W1994360423 @default.
- W4382499595 cites W1995403763 @default.
- W4382499595 cites W1995761751 @default.
- W4382499595 cites W1997043375 @default.
- W4382499595 cites W1997338331 @default.
- W4382499595 cites W1997991662 @default.
- W4382499595 cites W1998975481 @default.
- W4382499595 cites W2000697954 @default.
- W4382499595 cites W2002835122 @default.
- W4382499595 cites W2003985956 @default.
- W4382499595 cites W2007624093 @default.
- W4382499595 cites W2008680648 @default.
- W4382499595 cites W2009537421 @default.
- W4382499595 cites W2009704336 @default.
- W4382499595 cites W2009991434 @default.
- W4382499595 cites W2010465835 @default.
- W4382499595 cites W2011303894 @default.
- W4382499595 cites W2013055830 @default.
- W4382499595 cites W2018180327 @default.
- W4382499595 cites W2018276910 @default.
- W4382499595 cites W2019421568 @default.
- W4382499595 cites W2021468187 @default.
- W4382499595 cites W2025466026 @default.
- W4382499595 cites W2030690323 @default.
- W4382499595 cites W2037415867 @default.
- W4382499595 cites W2039304912 @default.
- W4382499595 cites W2039753816 @default.
- W4382499595 cites W2040422325 @default.
- W4382499595 cites W2040964459 @default.
- W4382499595 cites W2042136508 @default.
- W4382499595 cites W2043076811 @default.
- W4382499595 cites W2043700067 @default.
- W4382499595 cites W2045386399 @default.
- W4382499595 cites W2045474734 @default.
- W4382499595 cites W2048410601 @default.
- W4382499595 cites W2048992833 @default.
- W4382499595 cites W2050524666 @default.
- W4382499595 cites W2053480406 @default.
- W4382499595 cites W2054380694 @default.
- W4382499595 cites W2055552403 @default.
- W4382499595 cites W2056392157 @default.
- W4382499595 cites W2057271998 @default.
- W4382499595 cites W2057811472 @default.
- W4382499595 cites W2059939198 @default.
- W4382499595 cites W2061267238 @default.
- W4382499595 cites W2064289896 @default.
- W4382499595 cites W2064522536 @default.
- W4382499595 cites W2066397578 @default.
- W4382499595 cites W2066980677 @default.
- W4382499595 cites W2067308263 @default.