DOI: 10.1016/j.palaeo.2014.05.002
论文题名: Organic matter provenance and paleoenvironment in the Cretaceous on the Manihiki Plateau, South Pacific
作者: Simoneit B.R.T. ; Oros D.R. ; Medeiros P.M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 409 起始页码: 48
结束页码: 56
语种: 英语
英文关键词: Manihiki Plateau
; Multi-biomarkers
; Paleoenvironment
; Sediment
; South Pacific
英文摘要: Three holes at Site 317 on the High Manihiki Plateau were drilled in 1973 as part of the Deep Sea Drilling Project (DSDP). This plateau is of special interest because of its organic-rich shale formation during its early history, potentially linking paleo-depositional conditions and water depth or land exposure. A multi-tracer approach was used to analyze target organic-rich layers of Hole 317A core 16, Sections 2 and 3 from the early Cretaceous. This included bulk elemental and stable carbon isotope compositions of specific chemical classes (lipids, humic acids, kerogen), as well as individual biomarkers separated by thin layer chromatography and analyzed by gas chromatography-mass spectrometry. The major natural product contributions found in the core sediments were derived from three primary sources: algal (low molecular weight (<C20) n-alkanoic acids, n-alkanols and n-alkanes), bacterial (2-hydroxyalkanoic acids and hopanoids), and terrestrial (high molecular weight (>C22) aliphatic lipids, phytosterols, diterpenoids). Algal- and bacterial-derived compounds were observed at the shallowest layers of the core sample (680.30m below sea floor), and decreased with increasing core depth. Terrestrial inputs increased down core and peaked between 680.33 and 680.70m below sea floor. This trend coincides with a thick sapropel layer and agrees with the Oceanic Anoxic Event (OAE) in the early Cretaceous, indicating deposition in a shallow water environment in proximity to land (e.g., atoll). © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69285
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Chemistry, Oregon State University, Corvallis, OR, United States; 72 Marina Lakes Drive, Richmond, CA, United States; Department of Marine Sciences, University of Georgia, Athens, GA, United States
Recommended Citation:
Simoneit B.R.T.,Oros D.R.,Medeiros P.M.. Organic matter provenance and paleoenvironment in the Cretaceous on the Manihiki Plateau, South Pacific[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,409