{"refrec":{"BRefID":246672,"RR":"<b>Hu, J.F.; Peng, P.A.; Liu, M.Y.; Xi, D.P.; Song, J.Z.; Wan, X.Q.; Wang, C.S.</b> (2015). Seawater incursion events in a Cretaceous Paleo-lake revealed by specific marine biological markers. <i>NPG Scientific Reports 5(9508)</i>: 6 pp. <a href=\"http://dx.doi.org/10.1038/srep09508\" target=\"_blank\">http://dx.doi.org/10.1038/srep09508</a>","BEntID":238371,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 5(9508)</i>: 6 pp. <a href=\"http://dx.doi.org/10.1038/srep09508\" target=\"_blank\">http://dx.doi.org/10.1038/srep09508</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hu, J.F.; Peng, P.A.; Liu, M.Y.; Xi, D.P.; Song, J.Z.; Wan, X.Q.; Wang, C.S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hu, J.F. <i>et al.</i>","Englishabstract":"Many large paleo-lakes in North China were formed after the Triassic Era. Seawater incursion events (SWIEs) in these lakes have been extensively discussed in the literature, yet lack reliable methodology and solid evidence, which are essential for reconstructing and confirming SWIEs. The present study employs specific marine biological markers (24-<i>n</i>-propyl and 24-isopropyl cholestanes) to trace SWIEs in a dated core taken from the Songliao Basin (SLB). Two SWIEs were identified. The first SWIE from 91.37 to 89.00 Ma, was continuous and variable but not strong, while the second SWIE from 84.72 to 83.72 Ma was episodic and strong. SWIEs caused high total organic carbon (TOC) and negative d<sup>13</sup>C<sub>org</sub> values in the sediments, which were interpreted as an indication of high productivity in the lake, due to the enhancement of nutrient supplies as well as high levels of aqueous CO<sub>2</sub>, due to the mixing of alkaline seawater and acidic lake water. The SWIEs in SLB were controlled by regional tectonic activity and eustatic variation. Movement direction changes of the Izanagi/Kula Plate in 90 Ma and 84 Ma created faults and triggered SWIEs. A high sea level, from 90 to 84 Ma, also facilitated the occurrence of SWIEs in SLB.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Seawater incursion events in a Cretaceous Paleo-lake revealed by specific marine biological markers","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-27 01:31:11.861679","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2015-05-19","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000354106700001","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/srep09508"},"refs":null,"anarec":{"AnaID":246672,"PubliDate":2015,"Pagination":"6 pp","XtraPublOfAnaID":null,"ISBN":null,"Volume":"5","Issue":"9508","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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