气候变化领域集成服务门户(CCPortal): Coniacian-Campanian magnetostratigraphy of the Marambio Group: The Santonian-Campanian boundary in the Antarctic Peninsula and the complete Upper Cretaceous – Lowermost Paleogene chronostratigraphical framework for the James Ross Basin

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DOI	10.1016/j.palaeo.2020.109871
	Coniacian-Campanian magnetostratigraphy of the Marambio Group: The Santonian-Campanian boundary in the Antarctic Peninsula and the complete Upper Cretaceous – Lowermost Paleogene chronostratigraphical framework for the James Ross Basin
	Milanese F.N.; Olivero E.B.; Slotznick S.P.; Tobin T.S.; Raffi M.E.; Skinner S.M.; Kirschvink J.L.; Rapalini A.E.
发表日期	2020
ISSN	0031-0182
卷号	555
英文摘要	Recent magnetostratigraphic works from different areas of the James Ross Basin have expanded on chronostratigraphic studies previously based on ammonite, palynomorph and nanoplankton biostratigraphy, and strontium isotope stratigraphy. Here we present a new magnetostratigraphy of Coniacian through Campanian marine sedimentary rocks from Hidden Lake, Santa Marta and Snow Hill Island Formations, on northwest James Ross Island. A total of 189 paleomagnetic directions were obtained along more than 1500 m of stratigraphic thickness from Brandy Bay to Santa Marta Cove areas, identifying three polarity chrons of the global polarity time scale. The local magnetostratigraphic column starts in the upper part of the Cretaceous Normal Superchron C34N (Coniacian) and ends in Chron C33N (middle Campanian). The correlation between the magnetostratigraphy and the age framework given by ammonite biostratigraphy allowed the assignment of precise ages to particular horizons of the Santa Marta Formation. The newly identified geomagnetic polarity reversals are the earliest identified in the James Ross Basin and include: a) C34N/C33R (84.2 Ma, late Santonian – early Campanian) in the Alpha Member of the Santa Marta Formation and b) C33R/C33N (79.9 Ma, middle Campanian) in the upper Beta Member (Santa Marta Formation). By integrating this new data with previous work, we present a complete Upper Cretaceous – lowermost Paleogene chronostratigraphical framework for the basin, spanning both proximal to distal sedimentary facies of the Marambio Group. © 2020
英文关键词	Ammonites; Biostatigraphy; Coniacian-Santonian boundary; Cretaceous Normal Superchron; Late Cretaceous; Paleomagnetism
语种	英语
scopus关键词	Campanian; chronostratigraphy; Coniacian; Cretaceous-Paleogene boundary; facies; magnetostratigraphy; nanoplankton; palynomorph; sedimentary rock; Alaska; Antarctic Peninsula; Antarctica; Colombia; East Antarctica; Hidden Lake; James Ross Island; Magdalena [Colombia]; Ross Island; Santa Marta; Snow Hill Island; United States; West Antarctica; Ammonoidea
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150413
作者单位	Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires (IGeBA), Buenos Aires, Argentina; Centro Austral de Investigaciones Científicas (CADIC-CONICET), Ushuaia, Tierra del Fuego, Argentina; Department of Earth Sciences, Dartmouth College, Hanover, NH, United States; Department of Geological Sciences, University of Alabama, Tuscaloosa, AL, United States; Instituto de Ciencias Polares, Ambiente y Recursos Naturales (ICPA, UNDTF), Ushuaia, Tierra del Fuego, Argentina; Department of Geology, California State University, Sacramento, CA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Earth Life Science Institute, Tokyo Institute of Technology, Meguro, Tokyo, Japan
推荐引用方式 GB/T 7714	Milanese F.N.,Olivero E.B.,Slotznick S.P.,等. Coniacian-Campanian magnetostratigraphy of the Marambio Group: The Santonian-Campanian boundary in the Antarctic Peninsula and the complete Upper Cretaceous – Lowermost Paleogene chronostratigraphical framework for the James Ross Basin[J],2020,555.
APA	Milanese F.N..,Olivero E.B..,Slotznick S.P..,Tobin T.S..,Raffi M.E..,...&Rapalini A.E..(2020).Coniacian-Campanian magnetostratigraphy of the Marambio Group: The Santonian-Campanian boundary in the Antarctic Peninsula and the complete Upper Cretaceous – Lowermost Paleogene chronostratigraphical framework for the James Ross Basin.Palaeogeography, Palaeoclimatology, Palaeoecology,555.
MLA	Milanese F.N.,et al."Coniacian-Campanian magnetostratigraphy of the Marambio Group: The Santonian-Campanian boundary in the Antarctic Peninsula and the complete Upper Cretaceous – Lowermost Paleogene chronostratigraphical framework for the James Ross Basin".Palaeogeography, Palaeoclimatology, Palaeoecology 555(2020).