Article
Energy & Fuels
Huan Liu, Zhuo Xiong, Rong Peng, Bengen Gong, Lin Chang, Jianping Yang, Yongchun Zhao, Junying Zhang
Summary: The study investigated the efficacy of CuBr2-TCS as an adsorbent for removing Hg-0 in simulated coal-fired flue gas, demonstrating high removal efficiency. The in-depth exploration of Hg-0 removal performance under different flue gas components proved that CuBr2-TCS has a good removal effect on Hg-0.
Article
Energy & Fuels
James C. Hower, Cortland F. Eble, Maria Mastalerz
Summary: The Middle Pennsylvanian Duckmantian-age Fire Clay coal is a valuable coal resource known for its high quality and as a rare earth resource due to the deposition of lanthanide-rich volcanic ash. The Bear Branch section of the coal stands out for its unique liptinite- and inertinite-rich lithologies, especially below the ash-fall tonstein. The Fire Clay coal regionally has varying thicknesses, with Bear Branch having one of the thicker sections.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Huan Liu, Yu Chen, Tian Gao, Gangzhong Yang, Yi Wang, Yuming Zhou, Jianping Yang, Yongchun Zhao, Xin Guo, Junying Zhang
Summary: The study found that the use of MTCS in coal-fired power plants is beneficial for Hg-0 removal, especially in WFGD devices. Controlling factors such as injection rate, particle size, and residence time can enhance mercury removal efficiency, and MTCS is a low-cost suitable option for mercury control in coal-fired power plants.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Geosciences, Multidisciplinary
Rafael R. Bender, Paulo A. Souza, Pauline S. Kavali, Mahesh Shivanna, Cristina M. Felix, Guilherme Hermany
Summary: New palynological assemblages from the CBM-001-ST-RS borehole in the Santa Terezinha coalfield reveal two palynozones, the Vittatina costabilis (VcZ) and Lueckisporites virkkiae (LvZ) zones. The stratigraphic distribution differs from previous schemes, and an Asselian-Wordian age is suggested for the section based on radiometric datings and correlations with other Gondwana palynological associations.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Leah N. Thompson, Robert B. Finkelman, Sergey Arbuzov, David H. French
Summary: Tonsteins, altered volcanic ash layers commonly found in coal beds worldwide, were analyzed in the Minusinsk coal basin in southern Siberia, Russia. The unique mineralogical composition of ferroan magnesite in the tonsteins, along with the presence of a probable magmatic source, suggests a complex formation process involving dissolved magnesium and iron-bearing minerals mobilized by organic material in the peat swamp.
Article
Geology
Shuai Zhang, Wei Xiu, Hui Xi, Linsong Liu, Bo Sun, Brian J. Teppen, Qinfu Liu
Summary: The Datong Coalfield in Shanxi Province, North China, contains high-grade coal-measure kaolin that primarily occurs as partings within coal seams. The origins of these partings and the formation mechanism of the columnar/tabular and vermicular kaolinite remain uncertain. Petrographical, mineralogical, whole-rock geochemical, and zircon U-Pb-Hf isotopic studies were conducted on the coarse-grained partings to explore these issues. The results indicate that the partings are crystal tonsteins formed from volcanic ash, and the columnar/tabular and vermicular kaolinite are pseudomorphic kaolinite after plagioclase in the volcanic ash.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Eduardo Premaor, Elizabete P. Ferreira, Paulo A. Souza, G. Raquel Guerstein, Mitsuru Arai
Summary: This study conducted taxonomic and biochronostratigraphic analyses of dinoflagellate cysts from 26 cutting samples from well 1-SCS-2 in the northern part of the Pelotas Basin, revealing that the palynological assemblages are composed of continental and marine taxa, dominated by dinoflagellate cysts. Six palynochronostratigraphic intervals were defined in the sediments of the Imbe acute accent Formation and the Cidreira Formation.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Zhihui Zhang, Dawei Lv, Chengshan Wang, James C. Hower, Munira Raji, Tiantian Wang, Jianqiang Zhang, Yi Yang
Summary: This paper investigates the mineralogical and geochemical compositions of tonstein layers from the Middle Jurassic Yan'an Formation in the Ordos Basin of North China. The results suggest that the tonsteins were mainly derived from a significant pyroclastic source and have a felsic (rhyolitic) magma origin. The paper also analyzes the leaching behavior of trace elements from the tonsteins into the enclosing coals.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Paulo A. Souza, Daiana R. Boardman, Eduardo Premaor, Cristina M. Felix, Rafael R. Bender, Edvaldo J. Oliveira
Summary: Over the past two decades, the accuracy of radiometric ages for the Pennsylvanian-Permian section of the Paran'a Basin has improved, particularly from levels containing spore-pollen associations assigned to the Vittatina costabilis Zone (VcZ). This revision places VcZ between the Gzhelian and the Artinskian, documenting the Pennsylvanian-Permian transition.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Linsong Liu, Jintao Li, Jing Zhang, Riwa Hao, Xingjian Kang, Qinfu Liu
Summary: This study investigates the geochemical differences and controlling factors of two major types of coal-bearing stratum claystones in the Datong Coalfield of North China. The results show that the differences in geochemistry are mainly influenced by parent rocks and diagenetic processes.
GEOLOGICAL JOURNAL
(2022)
Article
Geology
Egly Perez Pincheira, Mercedes di Pasquo
Summary: The palynology of the Jaguel Formation in the Neuquen Basin, Argentina, was studied to define three palynological associations: A1 (upper Maastrichtian), A2, and A3 (Danian). The results showed that A1 was deposited in mixed to shallow marine environments, while A2 and A3 were deposited in coastal lagoons near shallow marine environments. The Danian assemblages at this site contain a large number of palm pollen grains.
CRETACEOUS RESEARCH
(2021)
Article
Biodiversity Conservation
F. C. Manosso, Zb Zwolinski, A. Najwer, B. T. Basso, D. S. Santos, M. Pagliarini
Summary: Geodiversity refers to the variety of abiotic elements and processes present at different scales and dimensions in an area. This study quantified and assessed geodiversity in the Marrecas River drainage basin in southern Brazil, finding lower geodiversity in certain interfluves and estuary areas, and higher geodiversity in valleys. The results highlight the importance of not solely focusing on the richness of geodiversity, but also considering the spatial distribution of environmental components in the study area.
ECOLOGICAL INDICATORS
(2021)
Article
Plant Sciences
Amalia Spina, Simonetta Cirilli, Mansour Ghorbani, Roberto Rettori, Andrea Sorci, Thomas Servais
Summary: A detailed palynological study was conducted on the lower Palaeozoic Mila and Ilbeyk formations in the Zagros Basin of southwestern Iran, establishing three palynozones and providing valuable correlations for age determination of Cambrian successions in southern Iran. The close affinities of the Cambrian assemblages with microfloras from peri-Gondwana and Baltica suggest they were part of the same large bioprovince as indicated by current palaeogeographical maps.
Article
Plant Sciences
Artai A. Santos, Sreepat Jain, Jose B. Diez
Summary: Late Jurassic paleobotanical records from the northeast of Gondwana are rare, but the first palynological assemblage from the upper part of the Antalo Limestone Formation in central western Ethiopia is diverse and well-preserved, indicating an age between Late Kimmeridgian and Late Tithonian. The palynological association is dominated by pollen and spores of continental origin, with some marine influence observed, suggesting the presence of three types of continental plant communities.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2021)
Article
Ecology
A. P. Rudke, A. C. F. Xavier, L. D. Martins, E. D. Freitas, C. B. Uvo, R. Hallak, R. A. F. Souza, R. V. Andreoli, T. T. de Almeida Albuquerque, J. A. Martins
Summary: In this study, the authors used Landsat images to identify the paths of land cover changes in the Upper Paraná River Basin. They found significant changes in cropland, forest, grassland, and savanna areas, which were mainly driven by agricultural and livestock activities. The study also showed a significant decrease in the Cerrado biome, primarily due to the expansion of cropland and the migration of pasture areas.
ECOLOGICAL INFORMATICS
(2022)
Article
Geosciences, Multidisciplinary
Ticiano Jose Saraiva dos Santos, Wagner da Silva Amaral, Matheus Fernando Ancelmi, Michele Zorzetti Pitarello, Reinhardt Adolfo Fuck, Elton Luiz Dantas
Article
Geosciences, Multidisciplinary
Matheus Fernando Ancelmi, Ticiano Jose Saraiva dos Santos, Wagner da Silva Amaral, Reinhardt Adolfo Fuck, Elton Luiz Dantas, Stefano Albino Zincone
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2015)
Article
Geosciences, Multidisciplinary
Jose Henrique da Silva Nogueira de Matos, Ticiano Jose Saraiva dos Santos, Lena Virginia Soares Monteiro
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2017)
Article
Geosciences, Multidisciplinary
Raisa Fagundes de Figueiredo, Ticiano Jose Saraiva dos Santos, Erica Martini Tonetto
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2018)
Article
Geology
Clovis Vaz Parente, Cesar Ulisses Vieira Verissimo, Nilson Francisquini Botelho, Roberto Perez Xavier, Jacqueline Menez, Ramon de Oliveira Lino, Cristian Dickson Araujo da Silva, Ticiano Jose Saraiva dos Santos
ORE GEOLOGY REVIEWS
(2019)
Article
Geosciences, Multidisciplinary
Isadora Marchetti, Fresia Ricardi-Branco, Flavia Callefo, Rafael Delcourt, Douglas Galante, Isabela Jurigan, Ismar S. Carvalho, Sandra A. S. Tavares
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2019)
Article
Geosciences, Multidisciplinary
Alanielson da Camara Dantas Ferreira, Elton Luiz Dantas, Ticiano Jose Saraiva dos Santos, Reinhardt A. Fuck, Mahyra Tedeschi
GEOSCIENCE FRONTIERS
(2020)
Article
Geosciences, Multidisciplinary
Ariel Milani Martine, Fresia Ricardi-Branco, Beatriz Beloto, Isabela Jurigan
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Rogerio Alves Bordalo, Ticiano Jose Saraiva dos Santos, Elton L. Dantas
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geochemistry & Geophysics
M. A. D. Silva, L. V. S. Monteiro, T. J. S. Santos, C. P. N. Moreto, S. D. Sousa, J. M. Faustinoni, G. H. C. Melo, R. P. Xavier, B. A. M. Toledo
Summary: In the Carajás Domain, the oldest units include migmatites affected by early dehydration and late water-fluxed partial melting. These processes resulted in the formation of different rocks with varying structures and compositions, revealing key periods in crustal evolution and the formation of continental crust.
Article
Geosciences, Multidisciplinary
Luiza de Carvalho Mendes, Ticiano Jose Saraiva dos Santos, Nadia Borges Gomes
Summary: The Western Gondwana region was formed due to the closure of the Pharusian-Goianides Ocean, leading to the formation of magmatic arcs, high-pressure belts, and sedimentary basins. Rocks in this region were classified based on their geochemical characteristics and isotopic data, showing different origins and depositional environments. The Caninde Complex and Independencia Unit were deposited in basins associated with both active and passive margin settings, controlled by the Santa Quiteria Magmatic Arc.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Joao Paulo A. Pitombeira, Wagner da S. Amaral, Ticiano J. S. dos Santos, Elton L. Dantas, Reinhardt A. Fuck
Summary: This study investigated the arc magmatism in the western active margin of Gondwana by analyzing new U-Pb zircon ages, lithogeochemistry, whole-rock Nd, and in situ zircon Hf isotopes from the Pacatuba-Maranguape Complex in NE Brazil. The results suggest that the granitoids in the area were formed from a mixture of juvenile magmas and older crustal components. The geochronological and geochemical data indicate a synchronous evolution with the Santa Quiteria Magmatic Arc, pointing to a magmatic flare-up event between 660 and 620 Ma during the subduction of Goias-Pharusian oceanic crust in the central portion of West Gondwana.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Isabela Jurigan, Fresia Ricardi-Branco, Rafael Delcourt
Summary: This study provides new information on the micro-ornamentations of actinopterygian teeth and rhomboid scales from the Corumbatai Formation. Cluster analysis was applied to analyze these fossils. The study reveals the wide temporal and spatial distribution of these fossils.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
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)