Hyperpycnal-fed lacustrine turbidites in rift basins: Facies analysis and diagenesis of the Early Cretaceous Pendência Formation, Potiguar Basin, Brazil

2018 ◽  
Vol 87 ◽  
pp. 4-24
Author(s):  
André L.S. Pestilho ◽  
Lena V.S. Monteiro ◽  
Daniel M. Oliveira ◽  
Eugênio V. Santos Neto
Keyword(s):  
Early Cretaceous ◽  
Facies Analysis ◽  
Rift Basins ◽  
Potiguar Basin

Bioclastic accumulation in a lake rift basin: The Early Cretaceous coquinas of the Sergipe–Alagoas Basin, Brazil

2020 ◽  
Vol 90 (2) ◽  
pp. 228-249 ◽  
Author(s):  
Ariely L. Rigueti ◽  
Patrick Führ Dal' Bó ◽  
Leonardo Borghi ◽  
Marcelo Mendes
Keyword(s):  
Early Cretaceous ◽  
Low Frequency ◽  
Oil Fields ◽  
Rift Basins ◽  
Depositional Facies ◽  
Depositional Processes ◽  
Campos Basin ◽  
Stratigraphic Model ◽  
Stacking Patterns

ABSTRACT Coquinas constitute widespread deposits in lacustrine, estuarine, and shallow marine settings, where they are a valuable source of information on environmental conditions. Thick coquina successions were deposited in a series of lacustrine rift basins that formed along the Brazilian Continental Margin during the early stages of the opening of the South Atlantic Ocean, in the Early Cretaceous. In the Sergipe–Alagoas Basin, the coquina sequence, equivalent to the Morro do Chaves Formation, crops out in the Atol Quarry, and is considered a relevant analog for the economically important hydrocarbon reservoirs in the Pre-salt strata (Barremian to Aptian) of the Campos Basin (Pampo, Badejo, and Linguado oil fields), which occur only in the subsurface. The aim of this study is to generate a depositional and stratigraphic model through facies and stratigraphic analyses of a well core. These analyses allowed the geological characterization of the Morro do Chaves Formation and of its transition to the adjacent stratigraphic units, the Coqueiro Seco Formation above and the Penedo Formation below, contributing to the growing knowledge of sedimentation in rift basins and exploratory models in hydrocarbon-producing reservoirs. Facies analysis consists of sedimentological, taphonomic, and stratigraphic features of the rocks. Fourteen depositional facies were recognized, stacked into low-frequency and high-frequency, deepening-upward and shallowing-upward cycles driven by the interaction between climate and tectonism. A depositional model is presented, based on the correlation between well-core and outcrop data described in previous studies, providing insights into the spatial distribution of facies. The detailed analysis of facies and stacking patterns sheds light on depositional processes, paleoenvironmental conditions, and the evolution of the system through time, so we may better understand analogous deposits in the geological record.

The Market Weighton High in the 21st century – new understandings of a long standing problem

2021 ◽  
pp. pygs2021-008
Author(s):  
John K. Wright
Keyword(s):  
21St Century ◽  
Early Cretaceous ◽  
Facies Analysis ◽  
Crustal Stresses ◽  
Marine Facies ◽  
Standing Problem

The sequence of Jurassic and Cretaceous strata laid down in north Lincolnshire is traced northwards onto the Market Weighton High, and compared with the equivalent Cleveland Basin sequence as it is traced south onto the High. Understanding of the manner of operation of the High has long been hindered by the amount of erosion of strata over the High, particularly in the Early Cretaceous. Facies analysis of the remaining strata present on either side of the High is used to estimate the thickness and the facies of strata originally deposited over the High. Although there were periodic uplifts of the High, leading to increasing omissions of strata approaching the High, there is little evidence that during the Jurassic the High was emergent for significant periods. Most strata were either originally present at Market Weighton in marginal marine facies, or continued across the High without interruption. The operation of the High in the light of modern understanding of crustal stresses during the Mesozoic is reviewed.

Lacustrine fan delta deposition alongside intrabasinal structural highs in rift basins: an example from the Early Cretaceous Jiuquan Basin, Northwestern China

2018 ◽  
Vol 107 (5) ◽  
pp. 1835-1858 ◽  
Author(s):  
Chengcheng Zhang ◽  
James D. Muirhead ◽  
Hua Wang ◽  
Si Chen ◽  
Yuantao Liao ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northwestern China ◽  
Rift Basins ◽  
Fan Delta

scholarly journals Spatiotemporal evolution of the Jehol Biota: Responses to the North China craton destruction in the Early Cretaceous

2021 ◽  
Vol 118 (34) ◽  
pp. e2107859118
Author(s):  
Zhonghe Zhou ◽  
Qingren Meng ◽  
Rixiang Zhu ◽  
Min Wang
Keyword(s):  
Early Cretaceous ◽  
North China Craton ◽  
North China ◽  
Depositional Environments ◽  
Rift Basins ◽  
Spatiotemporal Evolution ◽  
Jehol Biota ◽  
The North ◽  
Terrestrial Biota ◽  
Craton Destruction

The Early Cretaceous Jehol Biota is a terrestrial lagerstätte that contains exceptionally well-preserved fossils indicating the origin and early evolution of Mesozoic life, such as birds, dinosaurs, pterosaurs, mammals, insects, and flowering plants. New geochronologic studies have further constrained the ages of the fossil-bearing beds, and recent investigations on Early Cretaceous tectonic settings have provided much new information for understanding the spatiotemporal distribution of the biota and dispersal pattern of its members. Notably, the occurrence of the Jehol Biota coincides with the initial and peak stages of the North China craton destruction in the Early Cretaceous, and thus the biotic evolution is related to the North China craton destruction. However, it remains largely unknown how the tectonic activities impacted the development of the Jehol Biota in northeast China and other contemporaneous biotas in neighboring areas in East and Central Asia. It is proposed that the Early Cretaceous rift basins migrated eastward in the northern margin of the North China craton and the Great Xing’an Range, and the migration is regarded to have resulted from eastward retreat of the subducting paleo-Pacific plate. The diachronous development of the rift basins led to the lateral variations of stratigraphic sequences and depositional environments, which in turn influenced the spatiotemporal evolution of the Jehol Biota. This study represents an effort to explore the linkage between terrestrial biota evolution and regional tectonics and how plate tectonics constrained the evolution of a terrestrial biota through various surface geological processes.

Facies analysis, palaeoenvironmental reconstruction and stratigraphic development of the Early Cretaceous sediments (Lower Bima Member) in the Yola Sub-basin, Northern Benue Trough, NE Nigeria

2014 ◽  
Vol 96 ◽  
pp. 168-179 ◽  
Author(s):  
Babangida M. Sarki Yandoka ◽  
M.B. Abubakar ◽  
Wan Hasiah Abdullah ◽  
M.H. Amir Hassan ◽  
Bappah U. Adamu ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Facies Analysis ◽  
Benue Trough ◽  
Palaeoenvironmental Reconstruction

Late Jurassic – Early Cretaceous continental extension in northeast Asia – Relationships to plate kinematics

2017 ◽  
Vol 188 (1-2) ◽  
pp. 10 ◽  
Author(s):  
Yannick Daoudene ◽  
Denis Gapais ◽  
Jean-Pascal Cogné ◽  
Gilles Ruffet
Keyword(s):  
Early Cretaceous ◽  
Late Jurassic ◽  
Volcanic Rocks ◽  
Northeast Asia ◽  
Major Change ◽  
Rift Basins ◽  
Continental Extension ◽  
Metamorphic Core Complexes ◽  
The Pacific ◽  
Plate Kinematics

Northeast Asia is the greatest area in the world where continental extension is documented, from Transbaikalia to the Pacific coast. The major extensional events occurred during Late Jurassic - Early Cretaceous times and are marked by rift basins filled with continental sediments and volcanic rocks, metamorphic core complexes, and extensive magmatism. Here, we review the different types of extensional structures in the region using our own examples from eastern Mongolia, including new data from the Gobi area, and those previously documented in the adjacent regions. We further provide a compilation of available ages, including new data from Transbaikalia, to constrain crustal stretching throughout northeastern Asia. Our analysis shows that extension is not correlated to orogenic collapse, but is coeval with two major changes in plate kinematics that occurred at ca. 140 Ma: the closure of the Mongol-Okhotsk Ocean and a major change in the subduction direction of the Izanagi oceanic plate towards northeast Asia, from high-angle to low-angle convergence. These major changes in plate kinematics combined with an abnormally hot pre-extension state of the continental lithosphere might have triggered spreading in northeast Asia.

SEDIMENTARY FACIES ANALYSIS OF THE EARLY CRETACEOUS POISON STRIP AND RUBY RANCH MEMBERS OF THE CEDAR MOUNTAIN FORMATION, EAST-CENTRAL UTAH

2018 ◽  
Author(s):  
Michael C. Wizevich ◽  
◽  
Abigail C. Underwood ◽  
Isabelle Kisluk ◽  
Edward L. Simpson ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Facies Analysis ◽  
Sedimentary Facies ◽  
East Central ◽  
Cedar Mountain Formation
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