Matches in SemOpenAlex for { <https://semopenalex.org/work/W2124365512> ?p ?o ?g. }
- W2124365512 abstract "The Cenozoic record of the Lomonosov Ridge (central Arctic Ocean) recovered during Integrated Ocean Drilling Program (IODP) Expedition 302 revealed an unexpected 26 Ma hiatus, separating middle Eocene (∼44.4 Ma) from lower Miocene sediments (∼18.2 Ma). To elucidate the nature of this unconformity, we performed a multiproxy palynological (dinoflagellate cysts, pollen, and spores), micropaleontological (siliceous microfossils), inorganic, and organic (Tetra Ether Index of lipids with 86 carbon atoms (TEX 86 ) and Branched and Isoprenoid Tetraether (BIT)) geochemical analysis of the sediments from ∼5 m below to ∼7 m above the hiatus. Four main paleoenvironmental phases (A–D) are recognized in the sediments encompassing the unconformity, two below (A–B) and two above (C–D): (A) Below the hiatus, proxies show relatively warm temperatures, with Sea Surface Temperatures (TEX 86 ‐derived SSTs) of about 8°C and high fresh to brackish water influence. (B) Approaching the hiatus, proxies indicate a cooling trend (TEX 86 ‐derived SSTs of ∼5°C), increased freshwater influence, and progressive shoaling of the Lomonosov Ridge drilling site, located close to or at sea level. (C) The interval directly above the unconformity contains sparse reworked Cretaceous to Oligocene dinoflagellate cysts. Sediments were deposited in a relatively shallow, restricted marine environment. Proxies show the simultaneous influence of both fresh and marine waters, with alternating oxic and anoxic conditions. Pollen indicates a relatively cold climate. Intriguingly, TEX 86 ‐derived SSTs are unexpectedly high, ∼15–19°C. Such warm surface waters may be partially explained by the ingression of warmer North Atlantic waters after the opening of the Fram Strait during the early Miocene. (D) Sediments of the uppermost interval indicate a phase of extreme oxic conditions, and a well‐ventilated environment, which occurred after the complete opening of the Fram Strait. Importantly, and in contrast with classical postrifting thermal subsidence models for passive margins, our data suggest that sediment erosion and/or nondeposition that generated the hiatus was likely due to a progressive shoaling of the Lomonosov Ridge. A shallow water setting both before and after the hiatus suggests that the Lomonosov Ridge remained at or near sea level for the duration of the gap in the sedimentary record. Interacting sea level changes and/or tectonic activity (possibly uplift) must be invoked as possible causes for such a long hiatus." @default.
- W2124365512 created "2016-06-24" @default.
- W2124365512 creator A5015450343 @default.
- W2124365512 creator A5022501227 @default.
- W2124365512 creator A5025073569 @default.
- W2124365512 creator A5036503406 @default.
- W2124365512 creator A5044621318 @default.
- W2124365512 creator A5063324707 @default.
- W2124365512 creator A5072753343 @default.
- W2124365512 creator A5084006750 @default.
- W2124365512 creator A5090362285 @default.
- W2124365512 date "2008-02-29" @default.
- W2124365512 modified "2023-10-15" @default.
- W2124365512 title "A 26 million year gap in the central Arctic record at the greenhouse-icehouse transition: Looking for clues" @default.
- W2124365512 cites W1493983059 @default.
- W2124365512 cites W1563720491 @default.
- W2124365512 cites W1664261797 @default.
- W2124365512 cites W1913138165 @default.
- W2124365512 cites W1966583210 @default.
- W2124365512 cites W1966941399 @default.
- W2124365512 cites W1983794578 @default.
- W2124365512 cites W1990203356 @default.
- W2124365512 cites W1993212318 @default.
- W2124365512 cites W1994175070 @default.
- W2124365512 cites W2005832186 @default.
- W2124365512 cites W2016312112 @default.
- W2124365512 cites W2016706802 @default.
- W2124365512 cites W2018252460 @default.
- W2124365512 cites W2019940598 @default.
- W2124365512 cites W2034753142 @default.
- W2124365512 cites W2043606014 @default.
- W2124365512 cites W2047652555 @default.
- W2124365512 cites W2051300487 @default.
- W2124365512 cites W2056542719 @default.
- W2124365512 cites W2076574789 @default.
- W2124365512 cites W2085757798 @default.
- W2124365512 cites W2089951841 @default.
- W2124365512 cites W2097596444 @default.
- W2124365512 cites W2101510715 @default.
- W2124365512 cites W2106124584 @default.
- W2124365512 cites W2108316127 @default.
- W2124365512 cites W2109944676 @default.
- W2124365512 cites W2115575384 @default.
- W2124365512 cites W2120560331 @default.
- W2124365512 cites W2122730798 @default.
- W2124365512 cites W2123445693 @default.
- W2124365512 cites W2126632720 @default.
- W2124365512 cites W2132360578 @default.
- W2124365512 cites W2138717680 @default.
- W2124365512 cites W2144860488 @default.
- W2124365512 cites W2145876300 @default.
- W2124365512 cites W2160796378 @default.
- W2124365512 cites W2502396889 @default.
- W2124365512 cites W60353427 @default.
- W2124365512 doi "https://doi.org/10.1029/2007pa001477" @default.
- W2124365512 hasPublicationYear "2008" @default.
- W2124365512 type Work @default.
- W2124365512 sameAs 2124365512 @default.
- W2124365512 citedByCount "53" @default.
- W2124365512 countsByYear W21243655122012 @default.
- W2124365512 countsByYear W21243655122013 @default.
- W2124365512 countsByYear W21243655122014 @default.
- W2124365512 countsByYear W21243655122015 @default.
- W2124365512 countsByYear W21243655122016 @default.
- W2124365512 countsByYear W21243655122018 @default.
- W2124365512 countsByYear W21243655122019 @default.
- W2124365512 countsByYear W21243655122020 @default.
- W2124365512 countsByYear W21243655122021 @default.
- W2124365512 crossrefType "journal-article" @default.
- W2124365512 hasAuthorship W2124365512A5015450343 @default.
- W2124365512 hasAuthorship W2124365512A5022501227 @default.
- W2124365512 hasAuthorship W2124365512A5025073569 @default.
- W2124365512 hasAuthorship W2124365512A5036503406 @default.
- W2124365512 hasAuthorship W2124365512A5044621318 @default.
- W2124365512 hasAuthorship W2124365512A5063324707 @default.
- W2124365512 hasAuthorship W2124365512A5072753343 @default.
- W2124365512 hasAuthorship W2124365512A5084006750 @default.
- W2124365512 hasAuthorship W2124365512A5090362285 @default.
- W2124365512 hasBestOaLocation W21243655122 @default.
- W2124365512 hasConcept C108970007 @default.
- W2124365512 hasConcept C109007969 @default.
- W2124365512 hasConcept C111368507 @default.
- W2124365512 hasConcept C11864286 @default.
- W2124365512 hasConcept C12294951 @default.
- W2124365512 hasConcept C126559015 @default.
- W2124365512 hasConcept C127313418 @default.
- W2124365512 hasConcept C151730666 @default.
- W2124365512 hasConcept C162501224 @default.
- W2124365512 hasConcept C167195282 @default.
- W2124365512 hasConcept C18903297 @default.
- W2124365512 hasConcept C191735495 @default.
- W2124365512 hasConcept C2780142684 @default.
- W2124365512 hasConcept C2780204098 @default.
- W2124365512 hasConcept C2780618852 @default.
- W2124365512 hasConcept C32277403 @default.
- W2124365512 hasConcept C518008717 @default.
- W2124365512 hasConcept C73707237 @default.
- W2124365512 hasConcept C86803240 @default.
- W2124365512 hasConcept C97316735 @default.
- W2124365512 hasConceptScore W2124365512C108970007 @default.