FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2078136910> ?p ?o ?g. }

• W2078136910 endingPage "600" @default.
• W2078136910 startingPage "579" @default.
• W2078136910 abstract "We examined coarse fraction contents of pelagic carbonates deposited between 2000- and 3700-m water depth in the tropical Indian Ocean using ocean Drilling Program (ODP) sites 722 (Owen Ridge, Arabian Sea) and 758 (Ninetyeast Ridge, eastern equatorial Indian Ocean), and four giant piston cores collected by the French RN Marion Dufresne during the SEYMAMA expedition. Over the last 1500 kyr, coarse fraction records display high-amplitude oscillations with an irregular wavelength on the order of approximately 500 kyr. These oscillations can be correlated throughout the entire equatorial Indian Ocean, from the Seychelles area eastward to the Ninetyeast Ridge, and into the Arabian Sea. Changes in grain size mainly result from changes in carbonate dissolution as evidenced by the positive relationship between coarse fraction content and a foraminiferal preservation index based on test fragmentation. The well-known `'mid-Brunhes dissolution cycle'' represents the last part of this irregular long-term dissolution oscillation. The origin of this long-term oscillation is still poorly understood. Our observations suggest that it is not a true cycle (it has an irregular wavelength) and we propose that it may result from long-term changes in Ca++ flux to the ocean. Sites 722 and 758 deltaO-18 records provide a high-resolution stratigraphy that allows a detailed intersite comparison of the two coarse fraction records over the last 1500 kyr. Site 722 (2030 m) lies above the present and late Pleistocene lysocline. The lysocline shoaled to the position of site 758 (2925 m) only during the interglacial intervals that occurred between about 300 and 500 ka (Peterson and Prell, 1985a). Despite these supralysoclinal positions of the two sites, short-term changes in coarse fraction contents are correlatable from one site to another and probably result from regional (or global) dissolution pulses. By stacking the normalized coarse fraction records from sites 722 and 758, we constructed a Composite Coarse Fraction Index (CCFI) curve in which most of the local signals cancelled out. The last 800 kyr of this curve appear to compare extremely well with the Composite Dissolution Index curve from core V34-53 (Ninetyeast Ridge), which unambiguously records past variations of carbonate dissolution in the equatorial Indian Ocean (Peterson and Prell, 1985a). In the late Pleistocene the CCFI variations are mainly associated with glacial-interglacial changes. They show strong 100 and 41 kyr periodicities but no clear precession-related periodicities. As proposed earlier by Peterson and Prell (1985a), the lack of precession frequencies may suggest that the regional carbonate dissolution signal is driven by changes in deepwater circulation. We cannot totally reject the possibility, however, that low temporal resolution and/or bioturbation degrade somehow the precessional signal at ODP sites 722 and 758. In contrast, spectral density of dissolution cycles in the giant (53 m long) piston core MD900963 (Maldives area) displays clear maxima centered on the precession frequencies (23 and 19 kyr-1) as well as on the 29-kyr-1 frequency but shows little power at the 100-kyr-1 frequency. These high-frequency changes most probably result from changes in surface productivity associated with monsoon variability. Dissolution at this site may be ultimately controlled by the oxidation of organic matter which appears to be incorporated into the sediments in greater quantity during periods of weak SW monsoon and/or increased dry NE monsoon." @default.
• W2078136910 created "2016-06-24" @default.
• W2078136910 creator A5006450795 @default.
• W2078136910 creator A5049764425 @default.
• W2078136910 creator A5055698904 @default.
• W2078136910 creator A5055902382 @default.
• W2078136910 creator A5076165106 @default.
• W2078136910 creator A5079376903 @default.
• W2078136910 creator A5080523296 @default.
• W2078136910 creator A5083858632 @default.
• W2078136910 date "1994-08-01" @default.
• W2078136910 modified "2023-10-14" @default.
• W2078136910 title "Coarse fraction fluctuations in pelagic carbonate sediments from the tropical Indian Ocean: A 1500-kyr record of carbonate dissolution" @default.
• W2078136910 cites W12510168 @default.
• W2078136910 cites W1644379584 @default.
• W2078136910 cites W1966360142 @default.
• W2078136910 cites W1969431827 @default.
• W2078136910 cites W1981910844 @default.
• W2078136910 cites W1981970499 @default.
• W2078136910 cites W1985454049 @default.
• W2078136910 cites W1990933281 @default.
• W2078136910 cites W1991769531 @default.
• W2078136910 cites W1993165032 @default.
• W2078136910 cites W1994440891 @default.
• W2078136910 cites W1996318476 @default.
• W2078136910 cites W1999089340 @default.
• W2078136910 cites W2003726811 @default.
• W2078136910 cites W2007304702 @default.
• W2078136910 cites W2007818656 @default.
• W2078136910 cites W2008106242 @default.
• W2078136910 cites W2008769155 @default.
• W2078136910 cites W2009295994 @default.
• W2078136910 cites W2010186504 @default.
• W2078136910 cites W2015114736 @default.
• W2078136910 cites W2018196236 @default.
• W2078136910 cites W2019588334 @default.
• W2078136910 cites W2028492057 @default.
• W2078136910 cites W2034479558 @default.
• W2078136910 cites W2045431881 @default.
• W2078136910 cites W2045496658 @default.
• W2078136910 cites W2046771951 @default.
• W2078136910 cites W2047295615 @default.
• W2078136910 cites W2056412358 @default.
• W2078136910 cites W2061427697 @default.
• W2078136910 cites W2063460068 @default.
• W2078136910 cites W2065013306 @default.
• W2078136910 cites W2066136012 @default.
• W2078136910 cites W2066421406 @default.
• W2078136910 cites W2069709761 @default.
• W2078136910 cites W2071763271 @default.
• W2078136910 cites W2076769044 @default.
• W2078136910 cites W2077651183 @default.
• W2078136910 cites W2078209355 @default.
• W2078136910 cites W2083506860 @default.
• W2078136910 cites W2091632099 @default.
• W2078136910 cites W2093262705 @default.
• W2078136910 cites W2104416253 @default.
• W2078136910 cites W2107084004 @default.
• W2078136910 cites W2112108851 @default.
• W2078136910 cites W2129542530 @default.
• W2078136910 cites W2163237271 @default.
• W2078136910 cites W2217935970 @default.
• W2078136910 cites W2341422585 @default.
• W2078136910 cites W2492758999 @default.
• W2078136910 cites W2499871837 @default.
• W2078136910 cites W2595943596 @default.
• W2078136910 cites W2916871721 @default.
• W2078136910 doi "https://doi.org/10.1029/94pa00860" @default.
• W2078136910 hasPublicationYear "1994" @default.
• W2078136910 type Work @default.
• W2078136910 sameAs 2078136910 @default.
• W2078136910 citedByCount "138" @default.
• W2078136910 countsByYear W20781369102012 @default.
• W2078136910 countsByYear W20781369102013 @default.
• W2078136910 countsByYear W20781369102014 @default.
• W2078136910 countsByYear W20781369102015 @default.
• W2078136910 countsByYear W20781369102016 @default.
• W2078136910 countsByYear W20781369102017 @default.
• W2078136910 countsByYear W20781369102018 @default.
• W2078136910 countsByYear W20781369102019 @default.
• W2078136910 countsByYear W20781369102020 @default.
• W2078136910 countsByYear W20781369102021 @default.
• W2078136910 countsByYear W20781369102022 @default.
• W2078136910 countsByYear W20781369102023 @default.
• W2078136910 crossrefType "journal-article" @default.
• W2078136910 hasAuthorship W2078136910A5006450795 @default.
• W2078136910 hasAuthorship W2078136910A5049764425 @default.
• W2078136910 hasAuthorship W2078136910A5055698904 @default.
• W2078136910 hasAuthorship W2078136910A5055902382 @default.
• W2078136910 hasAuthorship W2078136910A5076165106 @default.
• W2078136910 hasAuthorship W2078136910A5079376903 @default.
• W2078136910 hasAuthorship W2078136910A5080523296 @default.
• W2078136910 hasAuthorship W2078136910A5083858632 @default.
• W2078136910 hasBestOaLocation W20781369102 @default.
• W2078136910 hasConcept C111368507 @default.
• W2078136910 hasConcept C127313418 @default.
• W2078136910 hasConcept C134097258 @default.
• W2078136910 hasConcept C147789679 @default.

• next