DOI: 10.1016/j.jsames.2020.102511
论文题名: Mesozoic biochronostratigraphy and paleoenvironment of the South Atlantic: A revised framework based on 20 DSDP and ODP deep-water sites
作者: Setoyama E. ; Kanungo S.
刊名: Journal of South American Earth Sciences
ISSN: 8959811
出版年: 2020
卷: 99 语种: 英语
英文关键词: Chronostratigraphy
; Deep Sea Drilling Project (DSDP)
; Ocean Drilling Program (ODP)
; Paleoenvironment
; South Atlantic
; Southern Ocean
Scopus关键词: biochronology
; biostratigraphy
; black shale
; chronostratigraphy
; Deep Sea Drilling Project
; deep water
; geographical distribution
; Mesozoic
; Ocean Drilling Program
; paleoenvironment
; Atlantic Ocean
; Atlantic Ocean (South)
; Southern Ocean
英文摘要: The South American and West African margins of the South Atlantic and the Southern Ocean are characterized by Mesozoic black shales that serve as source rocks of known and unknown petroleum systems. The knowledge of regional chronostratigraphy and paleoenvironment enables the prediction of the stratigraphic and geographic distribution of black shales with precision, as well as the understanding of local heterogeneity in regional- or global-scale oceanographic changes, such as oceanic anoxic events. Through sample re-analyses, this study provides a high-resolution Mesozoic chronostratigraphic and paleoenvironmental framework with the help of new micropaleontological data generated from 17 DSDP and ODP sites (out of 20 study sites), ranging from the Equatorial South Atlantic to the Southern South Atlantic. A series of eight regional Mesozoic unconformities are proposed and correlated to previously known unconformities or seismic reflectors. The regional paleoenvironmental interpretation, which utilizes the standardized chronostratigraphic framework, is herein accomplished for four time-horizons, namely, Middle Jurassic–Valanginian, Hauterivian–Albian, Cenomanian–Turonian, and Coniacian–Maastrichtian. Chronostratigraphic cross-sections and reconstruction maps for the time-horizons show that significant changes in paleoenvironmental parameters, such as bottom-water oxygenation and allochthonous sedimentation, were governed by the tectonic evolution of the South Atlantic margins. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158585
Appears in Collections: 气候变化与战略
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作者单位: University of Utah, Energy & Geoscience Institute (EGI), 423 Wakara Way, Suite 300, Salt Lake City, UT 84108, United States; University of Utah, Department of Geology and Geophysics, Salt Lake City, UT 84112, United States
Recommended Citation:
Setoyama E.,Kanungo S.. Mesozoic biochronostratigraphy and paleoenvironment of the South Atlantic: A revised framework based on 20 DSDP and ODP deep-water sites[J]. Journal of South American Earth Sciences,2020-01-01,99