Matches in SemOpenAlex for { <https://semopenalex.org/work/W3003971547> ?p ?o ?g. }
- W3003971547 abstract "Shales contain high levels of organic carbon (OC) and represent a large fraction of the Earth's reduced carbon stocks. While recent evidence suggests that shale-derived OC may be actively cycled in riverine systems, this process is poorly understood and not currently considered in global C models. Through the use of sediment density fractionations, extractions, radiocarbon measurements, and chemical characterization, we provide information on the abundance, chemistry, and mobility of shale-derived OC in floodplain sediments of a shale-rich mountainous watershed. The heavy fraction of the sediment, representing mineral-associated OC, is the largest (84 ± 6% of TOC) and oldest (Δ14C values −224 to −853‰) OC pool. Evidence of shale-derived OC is observed in all sediment C pools (i.e., occluded light fraction, water-soluble, and pyrophosphate-extractable) except the free light fraction, which is entirely modern. Relatively consistent chemistry was observed across samples for extracted and density-separated OC, despite wide ranges of Δ14C values. Carbon spectroscopy revealed that floodplain sediments had a higher degree of functionalized aromatic groups and lower carbonate content compared to shale collected nearby, consistent with chemical alteration and mixing with other C sources in the floodplain. We estimate that approximately 23–34% of sediment OC is derived from shale, with implications for other shale-derived elements (e.g., N). This study demonstrates the important contribution of shale-OC, particularly in environments with low litter inputs. The large impact of radiocarbon-dead shale-OC, which has a thermally altered chemical structure distinct from plant litter, on Δ14C values and reactivity of sediment-OC must be considered." @default.
- W3003971547 created "2020-02-07" @default.
- W3003971547 creator A5009405927 @default.
- W3003971547 creator A5011271995 @default.
- W3003971547 creator A5014553843 @default.
- W3003971547 creator A5015428787 @default.
- W3003971547 creator A5021249016 @default.
- W3003971547 creator A5074234215 @default.
- W3003971547 creator A5077442373 @default.
- W3003971547 date "2020-02-01" @default.
- W3003971547 modified "2023-10-04" @default.
- W3003971547 title "Shale as a Source of Organic Carbon in Floodplain Sediments of a Mountainous Watershed" @default.
- W3003971547 cites W1508704738 @default.
- W3003971547 cites W1603770066 @default.
- W3003971547 cites W1894390566 @default.
- W3003971547 cites W1922139594 @default.
- W3003971547 cites W1943209374 @default.
- W3003971547 cites W1947867386 @default.
- W3003971547 cites W1968603954 @default.
- W3003971547 cites W1970801056 @default.
- W3003971547 cites W1971698505 @default.
- W3003971547 cites W1973714196 @default.
- W3003971547 cites W1980332399 @default.
- W3003971547 cites W1984173122 @default.
- W3003971547 cites W1987263719 @default.
- W3003971547 cites W1996948953 @default.
- W3003971547 cites W1997054625 @default.
- W3003971547 cites W1998243138 @default.
- W3003971547 cites W2000178951 @default.
- W3003971547 cites W2002207351 @default.
- W3003971547 cites W2006233420 @default.
- W3003971547 cites W2008410509 @default.
- W3003971547 cites W2012773836 @default.
- W3003971547 cites W2016964999 @default.
- W3003971547 cites W2021376061 @default.
- W3003971547 cites W2028264794 @default.
- W3003971547 cites W2031547215 @default.
- W3003971547 cites W2032534685 @default.
- W3003971547 cites W2033536091 @default.
- W3003971547 cites W2040890506 @default.
- W3003971547 cites W2046767709 @default.
- W3003971547 cites W2050489726 @default.
- W3003971547 cites W2070227796 @default.
- W3003971547 cites W2071390384 @default.
- W3003971547 cites W2073386517 @default.
- W3003971547 cites W2076243370 @default.
- W3003971547 cites W2087196960 @default.
- W3003971547 cites W2100286653 @default.
- W3003971547 cites W2103850880 @default.
- W3003971547 cites W2106091483 @default.
- W3003971547 cites W2108934364 @default.
- W3003971547 cites W2109130772 @default.
- W3003971547 cites W2115165239 @default.
- W3003971547 cites W2115232352 @default.
- W3003971547 cites W2128817158 @default.
- W3003971547 cites W2128948717 @default.
- W3003971547 cites W2130898390 @default.
- W3003971547 cites W2130931170 @default.
- W3003971547 cites W2132484323 @default.
- W3003971547 cites W2132971553 @default.
- W3003971547 cites W2133021743 @default.
- W3003971547 cites W2134405136 @default.
- W3003971547 cites W2144857900 @default.
- W3003971547 cites W2145504679 @default.
- W3003971547 cites W2149747352 @default.
- W3003971547 cites W2151543090 @default.
- W3003971547 cites W2161378499 @default.
- W3003971547 cites W2214463317 @default.
- W3003971547 cites W2219357058 @default.
- W3003971547 cites W2222796084 @default.
- W3003971547 cites W2228101135 @default.
- W3003971547 cites W2327650751 @default.
- W3003971547 cites W2330438304 @default.
- W3003971547 cites W2496381587 @default.
- W3003971547 cites W2518370336 @default.
- W3003971547 cites W2593911960 @default.
- W3003971547 cites W2748324822 @default.
- W3003971547 cites W2795944119 @default.
- W3003971547 cites W2798194382 @default.
- W3003971547 cites W2889081365 @default.
- W3003971547 cites W2894238602 @default.
- W3003971547 cites W2895570830 @default.
- W3003971547 cites W2898411447 @default.
- W3003971547 cites W2921988685 @default.
- W3003971547 cites W2946779950 @default.
- W3003971547 cites W4230457499 @default.
- W3003971547 cites W4245325415 @default.
- W3003971547 cites W4294555410 @default.
- W3003971547 cites W2108271102 @default.
- W3003971547 doi "https://doi.org/10.1029/2019jg005419" @default.
- W3003971547 hasPublicationYear "2020" @default.
- W3003971547 type Work @default.
- W3003971547 sameAs 3003971547 @default.
- W3003971547 citedByCount "11" @default.
- W3003971547 countsByYear W30039715472020 @default.
- W3003971547 countsByYear W30039715472021 @default.
- W3003971547 countsByYear W30039715472022 @default.
- W3003971547 countsByYear W30039715472023 @default.
- W3003971547 crossrefType "journal-article" @default.
- W3003971547 hasAuthorship W3003971547A5009405927 @default.