globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.06.010
论文题名:
Cenomanian to Santonian radiolarian biostratigraphy, carbon isotope stratigraphy and paleoenvironments of the Sverdrup Basin, Ellef Ringnes Island, Nunavut, Canada
作者: Pugh A.T.; Schröder-Adams C.J.; Carter E.S.; Herrle J.O.; Galloway J.; Haggart J.W.; Andrews J.L.; Hatsukano K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 413
起始页码: 101
结束页码: 122
语种: 英语
英文关键词: Arctic ; Carbon isotope stratigraphy ; Cretaceous ; Paleoproductivity ; Radiolaria ; Sverdrup Basin
英文摘要: An upper Albian to Santonian sedimentary record on Ellef Ringnes Island, Canadian Arctic Archipelago, records variable paleoenvironmental conditions within the Cretaceous Polar Sea and Sverdrup Basin. The upper Albian to lower Cenomanian uppermost Christopher and Hassel formations represent a regressive system tract from offshore to shoreface/terrestrial paleoenvironments. The upper Cenomanian to Santonian shales of the Kanguk Formation signify a distal offshore basin setting controlled by increased subsidence and high global sea levels. Siliceous pelagic faunas and floras dominate the basin and herein, three informal radiolarian partial range zones are proposed for the Polar Sea. Alternating diversity and abundance patterns are interpreted as a response to sea-level controlled productivity systems. Transgressive phases correspond to low diversity shallow dwelling radiolarian taxa with an expanded oxygen minimum zone (OMZ); regressive phases are coupled with radiolarian radiations of deeper dwelling species and a depressed OMZ. The upper Cenomanian to Turonian was marked by increased preservation of marine-type organic matter and organic carbon isotope excursions indicate the presence of the Oceanic Anoxic Event 2 (OAE 2) at the base of the Kanguk Formation. Rock Eval data suggest that an increasing terrestrial influence prevailed during the Coniacian to Campanian time covering the OAE 3. Benthic environments are dominated by anoxic conditions, as suggested by the near lack of benthic foraminifera and extensive intervals of fine platy shale lacking bioturbation. Only the upper Coniacian records a return to dysoxic benthic conditions. Radiolarian faunal comparisons to more southern localities suggest migration routes from the east through a narrow North Atlantic pathway and from the Pacific through the Alaskan-Asian Pathway. © 2014 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69515
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Department of Earth Sciences, Carleton University, Ottawa, ON, Canada; Department of Geology, Portland State University, Portland, OR, United States; Institute of Geosciences, Goethe-University Frankfurt, Frankfurt am Main, Germany; Geological Survey of Canada, 3303-33 St. NW, Calgary, AB, Canada; Geological Survey of Canada, 1500-605 Robson Street, Vancouver, BC, Canada; Biodiversity and Climate Research Centre (BIK-F), Frankfurt am Main, Germany; ConocoPhillips Canada, 401 9thAvenue SW, Calgary, AB, Canada

Recommended Citation:
Pugh A.T.,Schröder-Adams C.J.,Carter E.S.,et al. Cenomanian to Santonian radiolarian biostratigraphy, carbon isotope stratigraphy and paleoenvironments of the Sverdrup Basin, Ellef Ringnes Island, Nunavut, Canada[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,413
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Pugh A.T.]'s Articles
[Schröder-Adams C.J.]'s Articles
[Carter E.S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Pugh A.T.]'s Articles
[Schröder-Adams C.J.]'s Articles
[Carter E.S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Pugh A.T.]‘s Articles
[Schröder-Adams C.J.]‘s Articles
[Carter E.S.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.