Arid
DOI10.1016/j.cretres.2015.10.016
North Atlantic climatic events recorded in Aptian Naskapi Member cores, Scotian Basin
Chavez, Isabel1; Piper, David J. W.2; Pe-Piper, Georgia1; Zhang, Yuanyuan1
通讯作者Chavez, Isabel
来源期刊CRETACEOUS RESEARCH
ISSN0195-6671
EISSN1095-998X
出版年2016
卷号60页码:297-307
英文摘要

Early Aptian black laminated organic mudstones, including the Selli Level, are recognized over large areas of Tethys and western European basins. This interval was investigated in a 75 m-thick continuously cored section of varicoloured shale in the lower Naskapi Member from the Panuke B-90 well in the Scotian Basin, offshore eastern Canada. This study complements the palaeogeographic range of correlatable Selli black shales and provides information on their relationship to sea-level change and palaeoclimate. Total organic carbon (TOC) was measured on 127 discrete samples, chemical environmental proxies (Th/K, Mn/Ti, K/Ti, Th/Ti, V/Ti) were measured with a portable X-ray fluorescence (pXRF) spectrometer, and colour parameters L*a*b* were measured by spectrophotometer. Several black shale levels are recognized and correlated with similar shales in Europe between the Barremian Aptian boundary and the Selli Level. The Th/K ratio proxy for hinterland humid or arid climate conditions shows no systematic variation with black shale levels. Several sea-level lowstands are inferred from condensed sandy intervals with some brackish water biota and tidal sedimentary structures. Black shale intervals are found in highstand intervals, with no systematic relationship to inferred transgressions. The formation of black shales is related to palaeoceanographic changes that may be driven by conditions remote from the Scotian Basin. (c) 2015 Elsevier Ltd. All rights reserved.


英文关键词Portable XRF Selli Level Black shales Sea level Palaeoclimate Cretaceous
类型Article
语种英语
国家Canada
收录类别SCI-E
WOS记录号WOS:000370098900021
WOS关键词PALEOCLIMATE ; GEOCHEMISTRY ; STRATIGRAPHY ; PROVENANCE ; CARBONATES ; RESOLUTION ; LOGS
WOS类目Geology ; Paleontology
WOS研究方向Geology ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/192183
作者单位1.St Marys Univ, Dept Geol, Halifax, NS B3H 3C3, Canada;
2.Nat Resources Canada, Geol Survey Canada Atlantic, Bedford Inst Oceanog, POB 1006, Dartmouth, NS B2Y 4A2, Canada
推荐引用方式
GB/T 7714
Chavez, Isabel,Piper, David J. W.,Pe-Piper, Georgia,et al. North Atlantic climatic events recorded in Aptian Naskapi Member cores, Scotian Basin[J],2016,60:297-307.
APA Chavez, Isabel,Piper, David J. W.,Pe-Piper, Georgia,&Zhang, Yuanyuan.(2016).North Atlantic climatic events recorded in Aptian Naskapi Member cores, Scotian Basin.CRETACEOUS RESEARCH,60,297-307.
MLA Chavez, Isabel,et al."North Atlantic climatic events recorded in Aptian Naskapi Member cores, Scotian Basin".CRETACEOUS RESEARCH 60(2016):297-307.
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