干旱区生态环境知识资源中心(Arid): Short-Term Sea Level Changes of the Upper Cretaceous Carbonates: Calibration between Palynomorphs Composition, Inorganic Geochemistry, and Stable Isotopes

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DOI	10.3390/min10121099
	Short-Term Sea Level Changes of the Upper Cretaceous Carbonates: Calibration between Palynomorphs Composition, Inorganic Geochemistry, and Stable Isotopes
	Mansour, Ahmed; Gentzis, Thomas; Wagreich, Michael; Tahoun, Sameh S.; Elewa, Ashraf M. T.
通讯作者	Gentzis, T (corresponding author), Core Labs LP, 6316 Windfern Rd, Houston, TX 77040 USA.
来源期刊	MINERALS
EISSN	2075-163X
出版年	2020
卷号	10 期号:12
英文摘要	Widespread deposition of pelagic-hemipelagic sediments provide an archive for the Late Cretaceous greenhouse that triggered sea level oscillations. Global distribution of dinoflagellate cysts (dinocysts) exhibited a comparable pattern to the eustatic sea level, and thus, considered reliable indicators for sea level and sequence stratigraphic reconstructions. Highly diverse assemblage of marine palynomorphs along with elemental proxies that relate to carbonates and siliciclastics and bulk carbonate delta C-13 and delta O-18 from the Upper Cretaceous Abu Roash A Member were used to reconstruct short-term sea level oscillations in the Abu Gharadig Basin, southern Tethys. Additionally, we investigated the relationship between various palynological, elemental, and isotope geochemistry parameters and their response to sea level changes and examined the link between these sea level changes and Late Cretaceous climate. This multiproxy approach revealed that a long-term sea-level rise, interrupted by minor short-term fall, was prevalent during the Coniacian-earliest Campanian in the southern Tethys, which allowed to divide the studied succession into four complete and two incomplete 3(rd) order transgressive-regressive sequences. Carbon and oxygen isotopes of bulk hemipelagic carbonates were calibrated with gonyaulacoids and freshwater algae (FWA)-pteridophyte spores and results showed that positive delta C-13(carb) trends were consistent, in part, with excess gonyaulacoid dinocysts and reduced FWA-spores, reinforcing a rising sea level and vice versa. A reverse pattern was shown between the delta O-18(carb) and gonyaulacoid dinocysts, where negative delta O-18(carb) trends were slightly consistent with enhanced gonyaulacoid content, indicating a rising sea level and vice versa. However, stable isotope trends were not in agreement with palynological calibrations at some intervals. Therefore, the isotope records can be used as reliable indicators for reconstructing changes in long-term sea level rather than short-term oscillations.
英文关键词	sequence palynology dinoflagellate cysts gonyaulacoid dinocysts stable carbon and oxygen isotopes major and trace elements southern Tethys Late Cretaceous sea level
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000602333600001
WOS关键词	NORTHERN WESTERN-DESERT ; DINOFLAGELLATE DIVERSITY ; HEMIPELAGIC CARBONATES ; SEQUENCE STRATIGRAPHY ; BOUNDARY EVENT ; BASIN ; EVOLUTION ; AFRICA ; AREA ; PALYNOFACIES
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349077
作者单位	[Mansour, Ahmed; Elewa, Ashraf M. T.] Menia Univ, Fac Sci, Geol Dept, Al Minya 61519, Egypt; [Gentzis, Thomas] Core Labs LP, 6316 Windfern Rd, Houston, TX 77040 USA; [Wagreich, Michael] Univ Vienna, Fac Earth Sci Geog & Astron, Dept Geol, A-1090 Vienna, Austria; [Tahoun, Sameh S.] Cairo Univ, Fac Sci, Geol Dept, Giza 12613, Egypt
推荐引用方式 GB/T 7714	Mansour, Ahmed,Gentzis, Thomas,Wagreich, Michael,et al. Short-Term Sea Level Changes of the Upper Cretaceous Carbonates: Calibration between Palynomorphs Composition, Inorganic Geochemistry, and Stable Isotopes[J],2020,10(12).
APA	Mansour, Ahmed,Gentzis, Thomas,Wagreich, Michael,Tahoun, Sameh S.,&Elewa, Ashraf M. T..(2020).Short-Term Sea Level Changes of the Upper Cretaceous Carbonates: Calibration between Palynomorphs Composition, Inorganic Geochemistry, and Stable Isotopes.MINERALS,10(12).
MLA	Mansour, Ahmed,et al."Short-Term Sea Level Changes of the Upper Cretaceous Carbonates: Calibration between Palynomorphs Composition, Inorganic Geochemistry, and Stable Isotopes".MINERALS 10.12(2020).