FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2396016288> ?p ?o ?g. }

• W2396016288 endingPage "81" @default.
• W2396016288 startingPage "60" @default.
• W2396016288 abstract "We investigate the use of Hg as a proxy for volcanism by studying four distal and two proximal sections in relation to the Deccan volcanic center, straddling the Cretaceous–Paleogene (KPg) boundary at (a) Højerup (Denmark), Bottaccione and Padriciano (Italy), (b) Meghalaya and Jhilmili (India), and (c) Bajada del Jagüel (Argentina). Hg sequestration by organic matter results in constant Hg/TOC ratio and linear correlation between Hg content of the sediments and total organic carbon (TOC). Elevated Hg concentrations that deviate from this linear relationship represent most likely true Hg anomalies and these notable Hg/TOC spikes (all TOC <1%) are found in the Meghalaya, Bottaccione and Højerup sections within the CF2 planktic foraminiferal biozone (spike I), at the KPg boundary (spike II), and within the P1a planktic foraminiferal subzone (spike III). Spike III occurs also in the Jhilmili section. No clear correlation between Hg/TOC and Al2O3 exists in any of the studied sections. The Hg anomalies probably result from strong volcanic episodes of the Deccan phase-2 (started 250 kyr before the KPg boundary and lasted for 750 kyr) that exhaled sulfuric aerosols, carbon dioxide and other toxic agents which reached a critical threshold, represented in true Hg enrichments in the paleoenvironments. The possibility that Hg enrichments resulted from anoxia scavenging on the seafloor and penetration downward into sediments is not supported in the stratigraphic record of Mo/Al ratios redox proxy. Hg isotopes were analyzed in samples from all KPg boundary sections in this study and from Bidart, France, the latter for comparison. Hg isotopes yielded δ202Hg values ranging from −1 to −2‰ and Δ201Hg signatures from 0 to 0.05‰ (spike II in Højerup, Bottaccione and Meghalaya KPg boundary layers) consistent with volcanic emission of Hg (0 to −2‰). The δ202Hg in spike I in Meghalaya and Padriciano and spike III in Jhilmili is consistent with volcanic emission of Hg. Two samples from Bajada del Jagüel and four from Bidart, however, display isotope signals compatible with volcanic emission/chondrite Hg. The results of three other samples are characteristic for reworked sediment, soil and/or peat. Most of the data show small positive Δ201Hg, in favor of long-term atmospheric transport prior to deposition, supporting a volcanic origin for the Hg. The present study broadens, therefore, the potential use of Hg as stratigraphic marker and, moreover, confirms that in the critical KPg transition, Hg was enriched in paleoenvironments at three distinct stages during the Deccan phase-2." @default.
• W2396016288 created "2016-06-24" @default.
• W2396016288 creator A5036592656 @default.
• W2396016288 creator A5039962635 @default.
• W2396016288 creator A5040210942 @default.
• W2396016288 creator A5041796048 @default.
• W2396016288 creator A5044162851 @default.
• W2396016288 creator A5050672420 @default.
• W2396016288 creator A5054389337 @default.
• W2396016288 creator A5057186651 @default.
• W2396016288 creator A5059521612 @default.
• W2396016288 creator A5063643538 @default.
• W2396016288 creator A5068699755 @default.
• W2396016288 creator A5072864030 @default.
• W2396016288 creator A5091682679 @default.
• W2396016288 date "2016-11-01" @default.
• W2396016288 modified "2023-10-14" @default.
• W2396016288 title "Mercury enrichment and Hg isotopes in Cretaceous–Paleogene boundary successions: Links to volcanism and palaeoenvironmental impacts" @default.
• W2396016288 cites W1252870339 @default.
• W2396016288 cites W1947034469 @default.
• W2396016288 cites W1964523361 @default.
• W2396016288 cites W1969708208 @default.
• W2396016288 cites W1969816911 @default.
• W2396016288 cites W1971908364 @default.
• W2396016288 cites W1972401739 @default.
• W2396016288 cites W1972579413 @default.
• W2396016288 cites W1977404263 @default.
• W2396016288 cites W1984823055 @default.
• W2396016288 cites W1986516591 @default.
• W2396016288 cites W1989521300 @default.
• W2396016288 cites W1992668499 @default.
• W2396016288 cites W1994549497 @default.
• W2396016288 cites W1998963014 @default.
• W2396016288 cites W2000012166 @default.
• W2396016288 cites W2001041004 @default.
• W2396016288 cites W2001274796 @default.
• W2396016288 cites W2005004394 @default.
• W2396016288 cites W2007156274 @default.
• W2396016288 cites W2009642568 @default.
• W2396016288 cites W2009674195 @default.
• W2396016288 cites W2012175616 @default.
• W2396016288 cites W2015127542 @default.
• W2396016288 cites W2015432537 @default.
• W2396016288 cites W2018544942 @default.
• W2396016288 cites W2018921387 @default.
• W2396016288 cites W2020154685 @default.
• W2396016288 cites W2022672235 @default.
• W2396016288 cites W2023347533 @default.
• W2396016288 cites W2032495972 @default.
• W2396016288 cites W2035370609 @default.
• W2396016288 cites W2040435671 @default.
• W2396016288 cites W2047073086 @default.
• W2396016288 cites W2047607847 @default.
• W2396016288 cites W2051730501 @default.
• W2396016288 cites W2053032930 @default.
• W2396016288 cites W2053080100 @default.
• W2396016288 cites W2055423530 @default.
• W2396016288 cites W2057350917 @default.
• W2396016288 cites W2066351018 @default.
• W2396016288 cites W2066860143 @default.
• W2396016288 cites W2067511066 @default.
• W2396016288 cites W2070957472 @default.
• W2396016288 cites W2073235999 @default.
• W2396016288 cites W2079030090 @default.
• W2396016288 cites W2081551078 @default.
• W2396016288 cites W2083043666 @default.
• W2396016288 cites W2083176686 @default.
• W2396016288 cites W2083769526 @default.
• W2396016288 cites W2084341057 @default.
• W2396016288 cites W2086138868 @default.
• W2396016288 cites W2092638382 @default.
• W2396016288 cites W2095688665 @default.
• W2396016288 cites W2098293862 @default.
• W2396016288 cites W2098640178 @default.
• W2396016288 cites W2102343886 @default.
• W2396016288 cites W210254174 @default.
• W2396016288 cites W2104296040 @default.
• W2396016288 cites W2110619496 @default.
• W2396016288 cites W2114710766 @default.
• W2396016288 cites W2118691770 @default.
• W2396016288 cites W2130799061 @default.
• W2396016288 cites W2133086566 @default.
• W2396016288 cites W2133829971 @default.
• W2396016288 cites W2134676488 @default.
• W2396016288 cites W2141514824 @default.
• W2396016288 cites W2149705273 @default.
• W2396016288 cites W2154497487 @default.
• W2396016288 cites W2159869456 @default.
• W2396016288 cites W2162730776 @default.
• W2396016288 cites W2163463585 @default.
• W2396016288 cites W2167352673 @default.
• W2396016288 cites W2170266681 @default.
• W2396016288 cites W2171017095 @default.
• W2396016288 cites W2187825126 @default.
• W2396016288 cites W2206804843 @default.
• W2396016288 cites W2282217899 @default.
• W2396016288 cites W2313539223 @default.
• W2396016288 cites W2316561749 @default.

• next