FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4324144442> ?p ?o ?g. }

• W4324144442 endingPage "111507" @default.
• W4324144442 startingPage "111507" @default.
• W4324144442 abstract "The late Smithian and the Smithian-Spathian boundary (SSB) are associated with harsh environmental conditions, including abrupt temperature changes, oceanic acidification and oxygen deficiency causing an additional marked loss of biotic diversity in the aftermath of the end-Permian mass extinction. Such environmental disturbances are documented worldwide through large fluctuations of the C, O, S and N biogeochemical cycles. This study presents secondary ion mass spectrometry pyrite Fe isotope analyses from the Lower Weber Canyon (LWC) section (Utah, USA) combined with bulk rock δ34Spy and δ34SCAS analyses in order to better understand the redox changes in different environmental settings along a ramp depositional system through the SSB. δ56Fe analyses show a large variability along the studied ramp system of ∼7‰ (from −1.99 to +5.39‰), over a set of 350 microscale analyses. Bulk sulfide sulfur isotope analyses, performed on 30 samples, show δ34Spy varying from −20.5 to +16.3‰. The inner ramp domain is characterized by a mean negative δ34Spy values of −11.4‰. A progressive 34S-enrichment (up to +16.3‰) is recorded in pyrite from mid and outer ramp settings. Carbonate associated sulfate (CAS) sulfur isotope analyses, performed on 5 samples, show relatively steady δ34Scas of +30.2 ± 2.2‰. Variations in δ34Spy are interpreted as reflecting the degree of connection between sediment porewaters and the overlying water column. Multiple lines of evidence point to a fully oxygenated water column and thus restricts pyrite formation to the sediments. Both the sedimentary environment and the nature of deposits seem to control δ56Fepy. In the inner ramp, high δ56Fepy values averaging +2.05‰ are only observed in microbially induced sedimentary structures (MISS), which record partial Fe-oxide reduction and oxidation reactions occurring at biofilms scale. In the absence of MISS, δ56Fepy inner ramp values are lighter (δ56Femean = +0.90‰) and reflect total reduction of Fe-oxides. In more distal and deeper mid and outer ramp settings, Fe isotope compositions are controlled by microbially-produced H2S that scavenged iron into sulfides. This study unravels local redox state changes in the upper part of some marine sediments by coupling Fe and S isotope systematics. It demonstrates that pyrite grains, and their sulfur and iron isotopic compositions, formed throughout the SSB should be used with caution to infer the redox state of the ocean after the Permian-Triassic biotic crisis." @default.
• W4324144442 created "2023-03-15" @default.
• W4324144442 creator A5001653807 @default.
• W4324144442 creator A5021424384 @default.
• W4324144442 creator A5022812567 @default.
• W4324144442 creator A5026635723 @default.
• W4324144442 creator A5033878600 @default.
• W4324144442 creator A5066480239 @default.
• W4324144442 creator A5067539942 @default.
• W4324144442 creator A5072234316 @default.
• W4324144442 date "2023-05-01" @default.
• W4324144442 modified "2023-10-14" @default.
• W4324144442 title "Pyrite iron isotope compositions track local sedimentation conditions through the Smithian-Spathian transition (Early Triassic, Utah, USA)" @default.
• W4324144442 cites W1771920109 @default.
• W4324144442 cites W1897386680 @default.
• W4324144442 cites W1960465926 @default.
• W4324144442 cites W1966572506 @default.
• W4324144442 cites W1967199319 @default.
• W4324144442 cites W1973662203 @default.
• W4324144442 cites W1980642324 @default.
• W4324144442 cites W1982834627 @default.
• W4324144442 cites W1996341408 @default.
• W4324144442 cites W1997252211 @default.
• W4324144442 cites W1997437344 @default.
• W4324144442 cites W1998090451 @default.
• W4324144442 cites W2003064666 @default.
• W4324144442 cites W2005237573 @default.
• W4324144442 cites W2014936152 @default.
• W4324144442 cites W2020434687 @default.
• W4324144442 cites W2020610733 @default.
• W4324144442 cites W2021838482 @default.
• W4324144442 cites W2024126945 @default.
• W4324144442 cites W2028843449 @default.
• W4324144442 cites W2029354874 @default.
• W4324144442 cites W2029366777 @default.
• W4324144442 cites W2035790288 @default.
• W4324144442 cites W2038292898 @default.
• W4324144442 cites W2042372974 @default.
• W4324144442 cites W2054150386 @default.
• W4324144442 cites W2055961385 @default.
• W4324144442 cites W2063897302 @default.
• W4324144442 cites W2066714823 @default.
• W4324144442 cites W2071552542 @default.
• W4324144442 cites W2072035941 @default.
• W4324144442 cites W2074797379 @default.
• W4324144442 cites W2089458176 @default.
• W4324144442 cites W2089899309 @default.
• W4324144442 cites W2096522903 @default.
• W4324144442 cites W2100153488 @default.
• W4324144442 cites W2114106775 @default.
• W4324144442 cites W2119855749 @default.
• W4324144442 cites W2129258230 @default.
• W4324144442 cites W2130723340 @default.
• W4324144442 cites W2142385449 @default.
• W4324144442 cites W2144588044 @default.
• W4324144442 cites W2148251251 @default.
• W4324144442 cites W2150526959 @default.
• W4324144442 cites W2153000470 @default.
• W4324144442 cites W2153587034 @default.
• W4324144442 cites W2157354465 @default.
• W4324144442 cites W2159138019 @default.
• W4324144442 cites W2220345332 @default.
• W4324144442 cites W2316396085 @default.
• W4324144442 cites W2323650771 @default.
• W4324144442 cites W2324965518 @default.
• W4324144442 cites W2326536068 @default.
• W4324144442 cites W2497090368 @default.
• W4324144442 cites W2545954251 @default.
• W4324144442 cites W2550326369 @default.
• W4324144442 cites W2552047291 @default.
• W4324144442 cites W2560464734 @default.
• W4324144442 cites W2588343230 @default.
• W4324144442 cites W2606536979 @default.
• W4324144442 cites W2769127705 @default.
• W4324144442 cites W2794943828 @default.
• W4324144442 cites W2810516320 @default.
• W4324144442 cites W2910261555 @default.
• W4324144442 cites W2912324314 @default.
• W4324144442 cites W2921550028 @default.
• W4324144442 cites W2923062786 @default.
• W4324144442 cites W3003748759 @default.
• W4324144442 cites W3007050727 @default.
• W4324144442 cites W3009130718 @default.
• W4324144442 cites W3034215009 @default.
• W4324144442 cites W3093615076 @default.
• W4324144442 cites W3097182955 @default.
• W4324144442 cites W3122700046 @default.
• W4324144442 cites W3154122882 @default.
• W4324144442 cites W3177415168 @default.
• W4324144442 cites W3184667005 @default.
• W4324144442 cites W3203945305 @default.
• W4324144442 cites W4319812171 @default.
• W4324144442 doi "https://doi.org/10.1016/j.palaeo.2023.111507" @default.
• W4324144442 hasPublicationYear "2023" @default.
• W4324144442 type Work @default.
• W4324144442 citedByCount "1" @default.
• W4324144442 countsByYear W43241444422023 @default.
• W4324144442 crossrefType "journal-article" @default.

• next