Article
Geochemistry & Geophysics
A. Kubo Hutchison, L. Karlstrom, T. Mittal
Summary: In this study, the Hough transform (HT) was used to quantify the spatial structure of dike swarms on different scales. The results showed that for the CRBG and Deccan Traps, a single radial or circumferential swarm does not well characterize the data. Instead, multiple and sometimes overlapping mesoscale linear and radial features are prevalent, suggesting a complex history of crustal stresses.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geosciences, Multidisciplinary
Rodrigo Cerri, Lucas Warren, Filipe G. Varejao, Alex J. Choupina A. Silva, Cristiano Lana, Mario L. Assine
Summary: This study examines the sedimentary records of two rift basins in northeastern Brazil and confirms the age relationships and provenance patterns between them through detrital zircon U-Pb age analysis. The results highlight a key change in source areas from rift to initial deposition of the intracratonic basin.
GEOLOGICAL MAGAZINE
(2022)
Article
Chemistry, Multidisciplinary
Jakub Deda, Tomasz Miroslaw
Summary: In this paper, the authors analyzed the structure of robot swarms, classifying them into structural and non-structural types based on inspiration from the animal world. The swarm structure was found to have a significant influence on individual robot structures, as demonstrated through a computer model and simulation.
APPLIED SCIENCES-BASEL
(2021)
Article
Geochemistry & Geophysics
Christian Schiffer, Marcus V. A. G. de Lima, Jose E. P. Soares, Randell Stephenson, Vitto C. M. de Araujo, Flavio T. Lima, Fabio A. S. Rocha, Cintia R. Trindade, Reinhardt A. Fuck
Summary: By analyzing active and passive source geophysical survey data, the authors studied the crustal structure and composition of the Parnaiba Basin in northeast Brazil using Vp/Vs ratios. They found variations in Vp/Vs ratios in different regions and provided possible explanations for these observations.
Article
Geosciences, Multidisciplinary
Maria Alcione Lima Celestino, Tiago Siqueira Miranda, Gorki Mariano, Marcio Lima Alencar, Jim Buckman, Nick M. W. Roberts, Jose Antonio Barbosa, Virginio H. M. L. Neumann, Jorge Andre Braz Souza, Eduardo Roemers-Oliveira
Summary: This study aims to understand the control of the Triunfo Fault Zone on the development of carbonate breccia pipes in the Crato Formation and constrain the timing of brittle deformation. Results suggest that polyphasic deformation in the pipes may be caused by the circulation of fluid along pre-existing faults and pipes.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Hang Liu, Jun-Hong Zhao, Long-Ming Li
Summary: The magmatism in the South Qinling Belt during the late Neoproterozoic represents the rift evolution of the continental lithosphere and the initiation of seafloor spreading, with distinct geochemical signatures indicating diverse mantle sources, including recycled crustal components.
Article
Geosciences, Multidisciplinary
Alanny Christiny Costa de Melo, David Lopes de Castro, Diogenes Custodio de Oliveira, Maria Helena Bezerra Maia de Hollanda
Summary: Mapping and analyzing dike swarms provide valuable insights into the orientation, geometry, distribution, emplacement mechanisms, and structural control during magmatic events, serving as a key tool for studying mantle plume activity, large igneous provinces, and continental breakup. Detailed mapping and classification of dike swarms are essential for understanding tectonic plate movements and evolution of continents. An integrated approach combining anomaly enhancement techniques with structural analysis helps to establish the role of Mesozoic and Cenozoic magmatic events in tectonic evolution.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
Article
Geology
Monica Oliveira Manna, Claiton Marlon dos Santos Scherer, Manoela Bettarel Ballico, Adriano Domingos dos Reis, Lucas Vargas Moraes, Lorenza Augusta Belitzki Ferrari, Henrique Berger Roisenberg, Victor Gualberto de Oliveira
Summary: Based on field data from the Jaicos Formation in NE Brazil, this study analyzes the architecture and changes in fluvial deposition, identifying two distinct fluvial units with different flow regimes. Fluvial unit 1 represents a system with low discharge variability, while unit 2 represents a system with high discharge variability.
SEDIMENTARY GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Jing Hu, Dong Jia, Guoqi Wei, Wuren Xie, Yiquan Li, Nan Su, Zhuxin Chen, Wei Yang, Zhigang Li, Chuang Sun, Yong Zhang
Summary: This study analyzes the structure and evolution of an underlying Neoproterozoic rift basin in the Sichuan Basin, based on seismic reflection data and magnetotelluric data. The preliminary hydrocarbon conditions in the rift basin are characterized, and the study provides important insights for deep hydrocarbon exploration in China and worldwide research on Neoproterozoic rift basins.
Article
Geochemistry & Geophysics
Hossein Azizi, Narges Daneshvar, Yoshihiro Asahara, Masayo Minami, Ryo Anma
Summary: Several parallel dike swarms composed of microgabbroic to doleritic rocks were discovered in the Biarjmand area. UPb dating of the zircon grains revealed a crystallization age of 46.0 +/- 7.1 Ma for the dikes. Chemical analysis showed similarities between the dikes and transitional mid-ocean ridge basalts (T-MORB).
JOURNAL OF PETROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Haitham Baggazi, Abdelhamid El-Fakharani, Kamal Ahmed Ali, Mohamed K. Elshafei, Adel Zein Bishta
Summary: Dike swarms and structural lineaments in the Hada Alsham area of Saudi Arabia were studied using remote sensing, field observations, and geochemical analysis techniques. The results indicate that the dike swarms have similar orientations and can be arranged chronologically. Geochemical analysis confirms the origin and tectonic setting of the dike swarms.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Ecology
Daniel Sedorko, Gabriel E. B. de Barros, Renata Guimaraes Netto, Renato Pirani Ghilardi, Sonia Agostinho, Kimberly Silva Ramos, Emmanuel Franco Neto, Carlos Alves Moreira Jr, Leonardo Borghi
Summary: Three trace fossils, Rusophycus, Cruziana, and Diplichnites, provide insights into the behavior and paleoecologic strategies of trilobites. This study focuses on the Rusophycus specimens from storm-influenced shallow marine deposits in the Parnaiba Basin, Brazil, and reveals dominance of young tracemakers and inferred r-strategist populations. The deep distribution of Rusophycus suggests molting activity as a possible trigger, with protection during ecdysis being a main reason for burrowing activities seen in the substrate.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Energy & Fuels
Danielle Marques-Lima, Joao Graciano Mendonca Filho, Carolina Fonseca, Antonio Donizeti de Oliveira, Joalice de Oliveira Mendonca, Paula Alexandra Goncalves
Summary: The Aptian-Albian sedimentary record of the Parnaiba Basin in NE Brazil provides insights into the evolution of a large shallow sag basin during the early opening stages of the South Atlantic. The study characterizes the nature, variability, and paleoenvironmental significance of the organic matter in the sedimentary succession, revealing alternating lacustrine and restriction periods with different depositional environments and organic contributions.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Geology
Amiya K. Samal, Apratim K. Rai, Rajesh K. Srivastava
Summary: This study examined two distinct mafic dike swarms in the Dharwar craton, finding similarities in petrology and geochemistry but also minor differences between the ca. 2.21 Ga Anantapur-Kunigal and ca. 2.18 Ga Mahbubnagar-Dandeli swarms. The dikes were likely formed through different degrees of partial melting and subsequently differentiated through similar processes, possibly due to heating by a common mantle plume. The findings support their connection to the Superia supercraton reconstruction during the early Proterozoic era.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Automation & Control Systems
Junhui Law, Xingzhou Du, Wentian Tang, Jiangfan Yu, Yu Sun
Summary: Micro/nanorobots show promise for future biomedical applications, but their motion and swarm behaviors are impacted by fluidic flow when applied in the circulatory system. In this study, an actuation strategy was proposed to navigate paramagnetic nanoparticle swarms and maintain their integrity in fluidic flow. Experimental results showed that the swarm should be pregathered to maintain its integrated shape, and the swarm integrity was influenced by flow rate and magnetic field parameters. Based on these findings, a strategy for swarm navigation in fluidic flow was established.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Geosciences, Multidisciplinary
Everton Nobrega Barbosa, Valeria Centurion Cordoba, Debora do Carmo Sousa
BRAZILIAN JOURNAL OF GEOLOGY
(2016)
Article
Geosciences, Multidisciplinary
Claiton Marlon dos Santos Scherer, Emanuel Ferraz Jardim de Sa, Valeria Centurion Cordoba, Debora do Carmo Sousa, Mayara Martins Aquino, Fatima Maria Canelas Cardoso
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2014)
Article
Geosciences, Multidisciplinary
Ana Barbara Sampaio Costa, Valeria Centurion Cordoba, Emanuel Ferraz Jardim de Sa, Claiton Marlon dos Santos Scherer
BRAZILIAN JOURNAL OF GEOLOGY
(2014)
Article
Geosciences, Multidisciplinary
Jos Gedson Fernandes da Silva, Valeria Centurion Cordoba, Luciano Henrique de Oliveira Caldas
BRAZILIAN JOURNAL OF GEOLOGY
(2014)
Article
Geosciences, Multidisciplinary
Pedro Henrique Moura da Silva, Emanuel Ferraz Jardim de Sa, Zorano Sergio de Souza, Valeria Centurion Cordoba
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Ana Karoliny Alves de Medeiros, Valeria Centurion Cordoba
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Barbara Ferreira Rapozo, Valeria Centurion Cordoba, Alex Francisco Antunes
Summary: The Rio do Peixe Basin in northeastern Brazil is part of a series of aborted rifts caused by the fragmentation of Pangea during the Mesozoic. The detailed structural framework reveals important features influenced by basement fabric, and understanding the spatial and temporal distribution of depositional systems is crucial for predicting petroleum systems.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
David Dominguez-Santos, Daniel Valderrama, Ahmet Utku Yazgan
Summary: This document presents a study comparing the spectra of large-magnitude seismic records in Chile between 2012 and 2022 with the design spectra of NCh433 and D. S 61. The aim is to determine if Chile's seismic-resistant regulations are updated to the existing reality and propose new design spectra that better represent the seismic activity in Chile during the last decade.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Prabhu Palanisamy, Vivek Sivakumar, Priya Velusamy, Logesh Natarajan
Summary: Shoreline changes in the southern coast of Rio de Janeiro, Brazil, were analyzed from 1986 to 2018. The study found that both natural and human factors significantly impact shoreline changes. The findings provided important insights into predicting future shoreline positions and identifying vulnerable regions. Additionally, human activities were found to influence shoreline change models, emphasizing the need for effective management strategies to protect ecosystems and communities.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Irina Salgado Bernal, Periyasamy Sivalingam, Armando Martinez Sardina, Michel Manduca Artiles, Maria E. Carballo Valdes, John Pote
Summary: This study investigated the presence of 15 toxic metals in surface sediment in a tropical river ecosystem in Cuba. The results showed that the sediments had higher concentrations of four metals compared to Cuban norms. Various contamination indices were calculated, and correlations analysis revealed the main sources of contamination. The study provides important information for the management of the river and emphasizes the need for metal pollution control and monitoring.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Camila Morgan, Eduardo Morgado, Miguel-Angel Parada, Raimundo Brahm, Francisca Mallea-Lillo
Summary: Lanin volcano is a composite volcano in the Andes, which has erupted lava flows with different compositions. The volcano's magma reservoir contains a crystal mush, and the pre-eruptive conditions include temperature, pressure, and oxygen fugacity. Fractional crystallisation has led to the evolution of the magma with different compositions.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Benjamin Idini, Sergio Ruiz, Jean-Paul Ampuero, Felipe Leyton, Efrain Rivera
Summary: This study investigates the role of wedge integrity on the frequency content of strong ground motion produced by subduction earthquakes in Northern Chile. The results show that the frequency characteristics of seismic waves vary with hypocentral distance, indicating lateral variations in anelastic attenuation due to the heterogeneous tectonic structure.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)