globalchange  > 气候变化事实与影响
DOI: 10.1016/j.epsl.2019.01.023
WOS记录号: WOS:000459839000008
论文题名:
Influence of the High Arctic Igneous Province on the Cenomanian/Turonian boundary interval, Sverdrup Basin, High Canadian Arctic
作者: Schroder-Adams, Claudia J.1; Herrle, Jens O.2; Selby, David3,4; Quesnel, Alex1; Froude, Gregory1
通讯作者: Schroder-Adams, Claudia J.
刊名: EARTH AND PLANETARY SCIENCE LETTERS
ISSN: 0012-821X
EISSN: 1385-013X
出版年: 2019
卷: 511, 页码:76-88
语种: 英语
英文关键词: Cenomanian/Turonian boundary interval ; High Arctic Large Igneous Province ; Os-187/Os-188 isotope composition ; carbon isotopes ; Arctic Sverdrup Basin ; foraminifera
WOS关键词: OCEANIC ANOXIC EVENT ; U-PB GEOCHRONOLOGY ; CARBON-ISOTOPE STRATIGRAPHY ; WESTERN INTERIOR BASIN ; AXEL-HEIBERG ISLAND ; MAGMATISM ; VOLCANISM ; SEA ; CHEMOSTRATIGRAPHY ; BIOSTRATIGRAPHY
WOS学科分类: Geochemistry & Geophysics
WOS研究方向: Geochemistry & Geophysics
英文摘要:

Emplacement of Large Igneous Provinces (LIPs) had a major effect on global climate, ocean chemistries as traced in sedimentary records and biotic turnovers. The linkage between LIPs and oceanic anoxic events has been documented with the Cenomanian/Turonian boundary event and Oceanic Anoxic Event 2 (OAE2). The Caribbean LIP and High Arctic Large Igneous Province (HALIP) are regarded as possible triggers. The pericratonic Arctic Sverdrup Basin is the partial location of the HALIP, where little is known about sedimentary, geochemical and biotic responses to the HALIP phases. Sedimentary strata at Glacier Fiord, Axel Heiberg Island, exhibit a dynamic Cretaceous polar carbon burial history within the lower to middle Cenomanian Bastion Ridge Formation and upper Cenomanian to Turonian part of the Kanguk Formation. We present the first initial Os-187/Os-188 (Os-i) composition profile for a polar Cenomanian/Turonian boundary interval (similar to 100-93.9 Ma) linked to recently dated magmatic phases of the Strand Fiord Formation, part of the HALIP. The carbon isotope record coupled with the Os-i profile show two events in the upper Cenomanian interval marked by positive carbon perturbations and shifts to more non-radiogenic Os-i compositions. The earlier short-lived event is interpreted as result of weathering of the surrounding Strand Fiord volcanics causing a local non-radiogenic Os-i signal. Coinciding transgressive shorelines let to an increase in marine and terrestrially derived organic matter. Subsequently, injection of mantle-derived basalts into organic rich sediments is credited with causing the release of methane documented in a distinct negative carbon isotope excursion. We speculate that the methane release of the HALIP was an important contribution for rapid global warming caused by increasing atmospheric CO2 levels associated with the OAE2 event likewise recognized in the Sverdrup Basin. As climate cooled in the middle and late Turonian, carbon burial decreased under increasingly oxygenated benthic conditions. Epifaunal foraminiferal species, adapted to low oxygen conditions, persisted during the OAE2. Our Cenomanian to Turonian multiproxy record of the Sverdrup Basin distinguishes between local and global signals within a restricted High Arctic basin. Our results demonstrate the interplay between basin tectonism and sea-level change, increased weathering during transgressive phases, seafloor processes such as hydrothermal activity and methane release and biotic response to a complex paleoceanography. With future reliable dated frameworks this unique polar record will facilitate correlations to other polar basins and records of lower paleolatitudes. (C) 2019 Elsevier B.V. All rights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/132933
Appears in Collections:气候变化事实与影响

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作者单位: 1.Carleton Univ, Dept Earth Sci, Ottawa, ON K1S 5B6, Canada
2.Goethe Univ Frankfurt, Biodivers & Climate Res Ctr BIK F, Inst Geosci, Altenhoeferallee 1, D-60438 Frankfurt, Germany
3.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
4.China Univ Geosci Wuhan, Sch Earth Resources, State Key Lab Geol Proc & Mineral Resources, Wuhan, Hubei, Peoples R China

Recommended Citation:
Schroder-Adams, Claudia J.,Herrle, Jens O.,Selby, David,et al. Influence of the High Arctic Igneous Province on the Cenomanian/Turonian boundary interval, Sverdrup Basin, High Canadian Arctic[J]. EARTH AND PLANETARY SCIENCE LETTERS,2019-01-01,511:76-88
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