干旱区生态环境知识资源中心(Arid): Geochemical variations across the Jurassic/Cretaceous boundary in central Mexico. Insights for correlation with Tethyan areas

Arid

DOI	10.1016/j.jsames.2020.102521
	Geochemical variations across the Jurassic/Cretaceous boundary in central Mexico. Insights for correlation with Tethyan areas
	Barragan, Ricardo 1; Lopez-Martinez, Rafael 1,2; Chavez-Vergara, Bruno 1,3; Nunez-Useche, Fernando 1; Salgado-Garrido, Hugo 4; Merino, Agustin 5
通讯作者	Lopez-Martinez, Rafael
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
出版年	2020
卷号	99
英文摘要	A multiproxy study of a 29 m-thick carbonate succession in the Apulco area, Puebla State in central Mexico including pyrite framboids, delta C-13(carb), delta O-18(carb), Total Inorganic Carbon (TIC), Total Organic Carbon (TOC) and Organic Matter (OM), reveals minor geochemical changes across the Jurassic/Cretaceous boundary. Anoxic bottom conditions during the Tithonian were registered by high values of TOC and OM, and low values of delta C-13(carb) and TIC. Near the Jurassic/Cretaceous boundary, signatures of all measured proxies changed drastically due to processes related with the organic matter preservation in the basin. These changes can be associated with the late Tithonian sea level drop and paleoclimatic variations passing from dry to semi-arid conditions. Otherwise, on late early to late Berriasian facies, values of all proxies tend to the stabilization indicating more oxygenated bottom conditions. The delta C-13(carb) goes to positive values while delta O-18(carb) and TIC remain constant, the organic matter and total organic carbon decrease to the lowest values. The geochemical behavior of the Apulco section is similar to those reported from other Tethyan sections as Brodno and DSDP 534A and can be preliminary correlated by its chemostratigraphic signal. Additionally, a central age of 141.65 Ma (Sr-87/Sr-86) in the very base of the calpionellid Elliptica Subzone strengthens the calpionellid biostratigraphic framework for Mexican sections.
英文关键词	Jurassic/cretaceous boundary Geochemistry Calpionellid biostratigraphy Mazatepec Mexico
类型	Article
语种	英语
国家	Mexico ; Spain
收录类别	SCI-E
WOS记录号	WOS:000528182600013
WOS关键词	JURASSIC-CRETACEOUS BOUNDARY ; PALEOCEANOGRAPHIC CHANGES ; ISOTOPE STRATIGRAPHY ; BIOSTRATIGRAPHY ; EVOLUTION ; PYRITE ; CALPIONELLIDS ; MOUNTAINS ; INDICATOR ; BIOEVENTS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	Universidad Nacional Autónoma de México
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315084
作者单位	1.Univ Nacl Autonoma Mexico, Inst Geol, Ciudad Univ, Ciudad De Mexico 04510, Mexico; 2.Univ Nacl Autonoma Mexico, Lab Carbonatos & Proc Karst, Ciudad Univ, Ciudad De Mexico 04510, Mexico; 3.Lab Nacl Geoquim & Mineral, Ciudad Univ, Ciudad De Mexico 04510, Mexico; 4.Univ Nacl Autonoma Mexico, Inst Geol, Posgrad Ciencias Tierra, Ciudad Univ, Ciudad De Mexico 04510, Mexico; 5.Univ Santiago de Compostela, Escuela Politecn Super, Campus Univ Lugo, Lugo 27002, Spain
推荐引用方式 GB/T 7714	Barragan, Ricardo,Lopez-Martinez, Rafael,Chavez-Vergara, Bruno,et al. Geochemical variations across the Jurassic/Cretaceous boundary in central Mexico. Insights for correlation with Tethyan areas[J]. Universidad Nacional Autónoma de México,2020,99.
APA	Barragan, Ricardo,Lopez-Martinez, Rafael,Chavez-Vergara, Bruno,Nunez-Useche, Fernando,Salgado-Garrido, Hugo,&Merino, Agustin.(2020).Geochemical variations across the Jurassic/Cretaceous boundary in central Mexico. Insights for correlation with Tethyan areas.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,99.
MLA	Barragan, Ricardo,et al."Geochemical variations across the Jurassic/Cretaceous boundary in central Mexico. Insights for correlation with Tethyan areas".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 99(2020).