{"refrec":{"BRefID":350626,"RR":"<b>Al-Suwaidi, A.H.; Ruhl, M.; Jenkyns, H.C.; Damborenea, S.E.; Manceñido, M.O.; Condon, D.J.; Angelozzi, G.N.; Kamo, S.L.; Storm, M.; Riccardi, A.C.; Hesselbo, S.P.</b> (2022). New age constraints on the Lower Jurassic Pliensbachian–Toarcian Boundary at Chacay Melehue (Neuquén Basin, Argentina). <i>NPG Scientific Reports 12</i>: 4975. <a href=\"https://dx.doi.org/10.1038/s41598-022-07886-x\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-022-07886-x</a>","BEntID":348322,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 12</i>: 4975. <a href=\"https://dx.doi.org/10.1038/s41598-022-07886-x\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-022-07886-x</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Al-Suwaidi, A.H.; Ruhl, M.; Jenkyns, H.C.; Damborenea, S.E.; Manceñido, M.O.; Condon, D.J.; Angelozzi, G.N.; Kamo, S.L.; Storm, M.; Riccardi, A.C.; Hesselbo, S.P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Al-Suwaidi, A.H. <i>et al.</i>","Englishabstract":"The Pliensbachian–Toarcian boundary interval is characterized by a ~ 3‰ negative carbon-isotope excursion (CIE) in organic and inorganic marine and terrestrial archives from sections in Europe, such as Peniche (Portugal) and Hawsker Bottoms, Yorkshire (UK). A new high-resolution organic-carbon isotope record, illustrating the same chemostratigraphic feature, is presented from the Southern Hemisphere Arroyo Chacay Melehue section, Chos Malal, Argentina, corroborating the global significance of this disturbance to the carbon cycle. The negative carbon-isotope excursion, mercury and organic-matter enrichment are accompanied by high-resolution ammonite and nannofossil biostratigraphy together with U–Pb CA-ID-TIMS geochronology derived from intercalated volcanic ash beds. A new age of ~ 183.73 + 0.35/− 0.50 Ma for the Pliensbachian–Toarcian boundary, and 182.77 + 0.11/− 0.15 for the <i>tenuicostatum</i>–<i>serpentinum</i> zonal boundary, is assigned based on high-precision U–Pb zircon geochronology and a Bayesian Markov chain Monte Carlo (MCMC) stratigraphic age model.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"New age constraints on the Lower Jurassic Pliensbachian–Toarcian Boundary at Chacay Melehue (Neuquén Basin, Argentina)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-09 01:32:20.864406","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Carbon cycle; Geochemistry; Geology; Sedimentology","OtherDescriptors":null,"Notes":null,"AnaPub":2022,"MonPub":null,"DateUpdate":"2022-06-21","DateCreate":"2022-03-24","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000772605500038","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/s41598-022-07886-x"},"refs":null,"anarec":{"AnaID":350626,"PubliDate":2022,"Pagination":"4975","XtraPublOfAnaID":null,"ISBN":null,"Volume":"12","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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