FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1640776711> ?p ?o ?g. }

• W1640776711 endingPage "394" @default.
• W1640776711 startingPage "367" @default.
• W1640776711 abstract "Rock-magnetic measurements of two sediment cores from the Madeira Abyssal Plain (MAP), north Atlantic, are used to investigate post-depositional changes in the concentration, grain size and composition of magnetic minerals in the sediments that have occurred within organic-rich turbidite horizons. The changes are associated with an initial stage of suboxic (reductive) diagenesis, following depletion of porewater O2, and a later stage of oxidative diagenesis associated with the slow descent of an oxidation front through the sediment, as a result of diffusion of O2 from the overlying sea water. The turbidites are of late Quaternary age (δ18O stages 1–3) and derive both from different sites on the NW African continental margin, and from the flanks of the Canary Islands. Thus, the turbidites are variable compositionally, especially in terms of carbonate, detrital magnetic mineral and organic carbon content. Diagenetic changes in these sediments have been identified using solid-phase geochemical data (U, Mn, Corg and CaCO3) reported previously in more than one study. Rock-magnetic parameters of the sediments, when expressed on a carbonate-free basis, reveal that significant depletion of detrital ferrimagnetic iron (Fe2+/Fe3+) oxide grains has occurred within organic-rich turbidites during redoxomorphic diagenesis. Normalized quotients of magnetic parameters also show that reductive diagenesis is a ferrimagnetic grain size-selective process, but it has a minimal effect on the canted-antiferromagnetic Fe3+ oxides in the sediment. Such components, if present, therefore become relatively enriched in magnetic assemblages as the ferrimagnetic grains are dissolved progressively, and bulk magnetic concentration is thus depleted. There is clear evidence in both cores for the existence of ultrafine ferrimagnetic grains at depth within the suboxic zone of the organic-rich turbidites, beneath both active and fossil oxidation fronts. These grains are most probably associated with populations of live magnetotactic bacteria, which commonly inhabit such organic-rich horizons and play a part in the chain of bacterially mediated reactions normally associated with suboxic diagenesis. These results show that simple and rapid rock-magnetic techniques can be used to characterize early diagenetic processes involving iron phases in deep-sea sediments, at least as effectively as more laborious, time-consuming and sample-destructive geochemical measurements." @default.
• W1640776711 created "2016-06-24" @default.
• W1640776711 creator A5063850710 @default.
• W1640776711 creator A5075233681 @default.
• W1640776711 date "2002-04-21" @default.
• W1640776711 modified "2023-10-18" @default.
• W1640776711 title "Rock-magnetic characterization of early, redoxomorphic diagenesis in turbiditic sediments from the Madeira Abyssal Plain" @default.
• W1640776711 cites W1042877418 @default.
• W1640776711 cites W1493164914 @default.
• W1640776711 cites W151864423 @default.
• W1640776711 cites W1601430150 @default.
• W1640776711 cites W1964236874 @default.
• W1640776711 cites W1966257249 @default.
• W1640776711 cites W1966329790 @default.
• W1640776711 cites W1969294734 @default.
• W1640776711 cites W1973022889 @default.
• W1640776711 cites W1976026121 @default.
• W1640776711 cites W1978702026 @default.
• W1640776711 cites W1979340125 @default.
• W1640776711 cites W1981322847 @default.
• W1640776711 cites W1982299193 @default.
• W1640776711 cites W1984946171 @default.
• W1640776711 cites W1986085983 @default.
• W1640776711 cites W1989229836 @default.
• W1640776711 cites W1990576030 @default.
• W1640776711 cites W1991569790 @default.
• W1640776711 cites W1998499530 @default.
• W1640776711 cites W2001203090 @default.
• W1640776711 cites W2002968376 @default.
• W1640776711 cites W2003014312 @default.
• W1640776711 cites W2003069188 @default.
• W1640776711 cites W2005066336 @default.
• W1640776711 cites W2007699130 @default.
• W1640776711 cites W2009254162 @default.
• W1640776711 cites W2009412541 @default.
• W1640776711 cites W2009678939 @default.
• W1640776711 cites W2011871416 @default.
• W1640776711 cites W2016402143 @default.
• W1640776711 cites W2018097728 @default.
• W1640776711 cites W2020398814 @default.
• W1640776711 cites W2021947786 @default.
• W1640776711 cites W2022273254 @default.
• W1640776711 cites W2022735813 @default.
• W1640776711 cites W2025139582 @default.
• W1640776711 cites W2027198048 @default.
• W1640776711 cites W2027931457 @default.
• W1640776711 cites W2029193961 @default.
• W1640776711 cites W2031431776 @default.
• W1640776711 cites W2038152826 @default.
• W1640776711 cites W2038299142 @default.
• W1640776711 cites W2038452885 @default.
• W1640776711 cites W2038863860 @default.
• W1640776711 cites W2038877584 @default.
• W1640776711 cites W2039249654 @default.
• W1640776711 cites W2041141455 @default.
• W1640776711 cites W2043668123 @default.
• W1640776711 cites W2046833020 @default.
• W1640776711 cites W2049795543 @default.
• W1640776711 cites W2050761377 @default.
• W1640776711 cites W2057580047 @default.
• W1640776711 cites W2059058832 @default.
• W1640776711 cites W2059463812 @default.
• W1640776711 cites W2059744811 @default.
• W1640776711 cites W2062770344 @default.
• W1640776711 cites W2065094666 @default.
• W1640776711 cites W2065507196 @default.
• W1640776711 cites W2071475250 @default.
• W1640776711 cites W2072456803 @default.
• W1640776711 cites W2078244170 @default.
• W1640776711 cites W2078684338 @default.
• W1640776711 cites W2080969185 @default.
• W1640776711 cites W2081449216 @default.
• W1640776711 cites W2082148142 @default.
• W1640776711 cites W2085700501 @default.
• W1640776711 cites W2087026230 @default.
• W1640776711 cites W2089047427 @default.
• W1640776711 cites W2094311820 @default.
• W1640776711 cites W2096388081 @default.
• W1640776711 cites W2098329477 @default.
• W1640776711 cites W2103590844 @default.
• W1640776711 cites W2110802958 @default.
• W1640776711 cites W2113906910 @default.
• W1640776711 cites W2121114281 @default.
• W1640776711 cites W2132907000 @default.
• W1640776711 cites W2140745650 @default.
• W1640776711 cites W2143651742 @default.
• W1640776711 cites W2150450312 @default.
• W1640776711 cites W2151338401 @default.
• W1640776711 cites W2165730372 @default.
• W1640776711 cites W2182420268 @default.
• W1640776711 cites W2189230258 @default.
• W1640776711 cites W2495447009 @default.
• W1640776711 cites W2917132195 @default.
• W1640776711 cites W353997391 @default.
• W1640776711 cites W4205930314 @default.
• W1640776711 cites W4231995025 @default.
• W1640776711 cites W4236066966 @default.
• W1640776711 cites W4244831783 @default.

• next