Article
Geosciences, Multidisciplinary
Pierig Deiller, Pavla Stipska, Marc Ulrich, Karel Schulmann, Stephen Collett, Vit Peresty, Bradley Hacker, Andrew Kylander-Clark, Hubert Whitechurch, Ondrej Lexa, Eric Pelt, Jitka Mikova
Summary: The study examined previously unrecognized mafic and felsic plutonic rocks, as well as a possible upper-crustal equivalent, in the Bohemian Massif. The rocks exhibited evidence of active margin magmatism and Mid-Devonian magmatism, with a three-stage geodynamic model proposed to explain their formation. The magmatic rocks recorded a Mid-Devonian magmatic arc related to the subduction wedge beneath the upper plate.
Article
Geochemistry & Geophysics
Anthony Pochon, Giada Iacono-Marziano, Eric Gloaguen, Johann Tuduri, Saskia Erdmann
Summary: This study characterizes the alteration of the Saint-Jean-du-Doigt mafic-dominated, bimodal intrusive complex in the Armorican Massif through petrographic investigation and geochemical analysis. The findings suggest a progressive alteration process from the lower to the upper part of the intrusion, with mineralogical and chemical changes observed in plagioclase and clinopyroxene. It is proposed that the alteration is mainly caused by the interaction between the gabbroic rocks and exsolved magmatic fluids.
Article
Geosciences, Multidisciplinary
Stephen Collett, Pavla Stipska, Karel Schulmann, Jitka Mikova, Alfred Kroener
Summary: The study of the Velke Vrbno Dome eclogite provides evidence for the emplacement of eclogite protoliths in a transitional supra-subduction to continental-rift setting. Additionally, the discovery of a fragment of Palaeoproterozoic basement in the region suggests an earlier geological history.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2021)
Article
Geosciences, Multidisciplinary
Stephen Collett, Karel Schulmann, Pierig Deiller, Pavla Stipska, Vit Peresty, Marc Ulrich, Yingde Jiang, Luc de Hoym de Marien, Jitka Mikova
Summary: This article investigates the high-pressure and high-temperature metamorphism during the Mid-Devonian period in the Variscan Orogeny, focusing on the geological characteristics of the Marianske Lazne Complex (MLC). The unique position of MLC at the base of its original upper plate is highlighted. The study reveals that both MLC and the upper plate developed above a relatively unaltered Neoproterozoic lithospheric mantle, which is important for reconstructing the original architecture of the Variscan terranes.
GEOSCIENCE FRONTIERS
(2022)
Review
Geosciences, Multidisciplinary
Pengcheng Wang, Sanzhong Li, Yanhui Suo, Lingli Guo, M. Santosh, Xiyao Li, Guangzeng Wang, Zhaoxia Jiang, Bo Liu, Jie Zhou, Suhua Jiang, Xianzhi Cao, Ze Liu
Summary: The study reveals that the South China Sea and its northern margin experienced two stages of faulting during the Cenozoic, linked to the subduction of the Pacific Plate, the Indo-Eurasian collision, and the slab-pull forces of the proto-South China Sea. These processes led to the formation of unique geological structures along the northern margin of the South China Sea and influenced its opening process.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Prokop Zavada, Pavia Stipska, Pavlina Hasalova, Martin Racek, Petr Jerabek, Karel Schulmann, Andrew Kylander-Clark, Robert Holder
Summary: The study conducted on a sequence of samples from a (U)HP crustal section in the Eger Crystalline Complex revealed important insights into the process of crustal metamorphism and melt percolation, indicating a 15+/-3 Ma period of monazite (re)crystallization. Age and trace element distribution of monazite grains provided valuable information on the complex geological processes involved in Variscan continental subduction.
Article
Geochemistry & Geophysics
Tom Jaroka, Jeorg A. Pfaender, Thomas Seifert, Folkmar Hauff, Blanka Sperner, Sebastian Staude, Tobias Stephan, Bernhard Schulz
Summary: The Lausitz Block in the northern Bohemian Massif contains dike-to-stock-shaped gabbroic intrusions that form two groups: Group I consists of hornblende-poor lithologies, while Group II consists of hornblende-rich lithologies. Some of these intrusions have small-scale Ni-Cu-(PGE) sulfide accumulations. The intrusions, which intruded Cadomian granodiorites during the Middle to Late Devonian, provide potential exploration targets for Ni-Cu deposits.
Article
Geochemistry & Geophysics
Vojtech Wertich, Martin Kubes, Jaromir Leichmann, Marketa Hola, Jakub Haifler, Juraj Mozola, Pavla Hrselova, Michal Jaros
Summary: This study analyzed the trace element compositions of unaltered uraninite samples from different ore fields in a uranium province. The results showed variations in trace element signatures among the samples, indicating the importance of physico-chemical conditions, lithological controls, and fluid-rock interaction processes in influencing the minor and trace element compositions of uraninite.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Geosciences, Multidisciplinary
Peijia Chen, Nianqiao Fang, Xiaobo Yuan, Ziyi Wang
Summary: The Sanshui Basin is a continental rift basin located at the southern continental margin of the South China Block. It is known for its widely distributed bimodal volcanic rocks. However, the petrogenesis of these volcanic rocks, especially the felsic volcanic rocks, is not well understood. In this study, the petrology, geochronology, and geochemistry of trachytes and rhyolites from the basin were investigated to gain insight into their petrogenesis and geodynamic implications. The results revealed peralkaline affinity in these volcanic rocks and indicated that they were formed by fractional crystallization with minor crustal contamination. The volcanic activity in the Sanshui Basin peaked in the Eocene, around 56 million years ago, and provided crucial insights into the Cenozoic breakup of the continental margin of South China.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Chaoyang Liu, Xuanlong Shan, Jian Yi, Yunqian Shi, Guido Ventura
Summary: This study investigates the evolution of volcanism and the transition to the post-rift stage in the Songliao Basin in northeastern China. The results reveal the geochemical characteristics of volcanic rocks and shed light on the processes involved in the continental rifting.
Article
Geosciences, Multidisciplinary
Guo-Chao Sun, You-Shan Xia, Gang Wen, Lei Qin, Qing-Yang Xu, Li-Qun Dai, Zi-Fu Zhao
Summary: Post-collisional alkaline intrusive rocks from the Dabie orogen were studied to understand crust-mantle interaction in the collision zone. The rocks have arc-like trace element and isotopic compositions consistent with subducted South China Block reacting with the lithospheric mantle wedge of the North China Block. Syn-magmatic zircon dating revealed Early Cretaceous ages coeval with post-collisional magmatism. The results provide insights into the nature of their mantle sources and suggest slab-mantle interaction during Triassic continental collision.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Mathilde Mercuzot, Christophe Thomazo, Johann Schnyder, Pierre Pellenard, Francois Baudin, Anne-Catherine Pierson-Wickmann, Pierre Sans-Jofre, Sylvie Bourquin, Laurent Beccaletto, Anne-Lise Santoni, Georges Gand, Matthieu Buisson, Laure Gle, Thomas Munier, Antonios Saloume, Mohamed Boussaid, Tracy Boucher
Summary: By analyzing the organic-rich sedimentary successions from the late Carboniferous to early Permian, the study highlights the relationship between geodynamics and climate change during the late-orogenic period. Different origins of organic matter were identified, with high organic matter storage events possibly resulting from secondary processes.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Guang Yang, Ren-Xu Chen, Yong-Fei Zheng, Qiong-Xia Xia, Yong-Jie Yu, Kun Li, Zhaochu Hu, Bing Gong, Xiang-Ping Zha
Summary: This study investigates the growth conditions and evolution of zircon minerals at different stages of anatectic metamorphism in the Bohemian Massif. The results show that the formation of zircon is closely related to the metamorphic conditions, and the chemical composition and crystallization characteristics of zircon can vary in different metamorphic environments.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
V. V. Vrublevskii, I. F. Gertner
Summary: The text discusses differentiated intrusions in the northern part of the Kuznetsk Alatau alkaline igneous province, composed of subalkaline and alkaline gabbro, foidolite, nepheline and alkaline syenites, and rare carbonatites derived from mantle melting. The involvement of OIB- and IAB-type oceanic and marginal-continental lithosphere materials in magma generation, as well as upper crustal contamination, led to the formation of heterogeneous magma sources. Such geochemical data suggest a geodynamic setting of impact of a mantle plume on accretion-collisional complexes of the former active continental margin.
Article
Geochemistry & Geophysics
Lukas Krmicek, Jaromir Ulrych, Emil Jelinek, Roman Skala, Simona Krmickova, Zuzana Korbelova, Kadosa Balogh
Summary: Representative samples of high-Mg rocks from the Ceske stredohori Mts. in the Ohre/Eger Rift were studied and compared with similar rocks from the Bohemian Massif. The study found overlapping compositions and isotopic characteristics, indicating a heterogeneous lithospheric source for the high-Mg volcanic rocks.
MINERALOGY AND PETROLOGY
(2021)
Article
Geochemistry & Geophysics
Lukas Krmicek, Jaromir Ulrych, Emil Jelinek, Roman Skala, Simona Krmickova, Zuzana Korbelova, Kadosa Balogh
Summary: Representative samples of high-Mg rocks from the Ceske stredohori Mts. in the Ohre/Eger Rift were studied and compared with similar rocks from the Bohemian Massif. The study found overlapping compositions and isotopic characteristics, indicating a heterogeneous lithospheric source for the high-Mg volcanic rocks.
MINERALOGY AND PETROLOGY
(2021)
Article
Anthropology
Zdenek Vytlacil, Sylva Drtikolova Kaupova, Michaela Jilkova, Lumir Polacek, Lukas Ackerman, Petr Veleminsky
Summary: This study provides insight into early medieval population mobility in the Great Moravia area, showing that 13-19% of individuals in the Mikulcice-Valy stronghold are likely migrants from at least three distinct areas. Elite residents are more prone to migration, while non-elite males are notably lacking among non-local populations. Possible factors contributing to mobility are questioned for future research directions.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2021)
Article
Geography, Physical
Jan Pasava, Lukas Ackerman, Jiri Zak, Frantisek Veselovsky, Robert A. Creaser, Martin Svojtka, Beatrice Luais, Ondrej Pour, Ondrej Sebek, Jakub Trubac, Eva Vosahlova, Damien Cividini
Summary: This study analyzes a Lower Cambrian geological sequence in the Czech Republic and reveals that it was deposited under changing redox conditions over a short time span, with the basin likely controlled by tectonic subsidence and terrigenous material supply. The study also suggests that the iron isotopic signatures in the black shales are likely a result of partial oxidation of pyrite through hydrothermal fluids, rather than other processes such as iron shuttling or mixing of sources.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geochemistry & Geophysics
Anirban Mandal, Gyana Ranjan Tripathy, Vineet Goswami, Lukas Ackerman, Suraj K. Parcha, Rakesh Chandra
Summary: The study investigated the Re-Os isotopic systematics of black shales and siltstones from the Himalayas to constrain their depositional ages, revealing varying Re-Os systematics in different locations. Global compilation of Re-187/Os-188 ratios in Late Permian shales and bathymetric distribution of Re/Os ratios suggest a strong role of macroalgae in regulating the Re-Os system in shales.
Article
Geosciences, Multidisciplinary
Jiri Zak, Filip Tomek, Martin Svojtka, Frantisek Vacek, Vaclav Kachlik, Lukas Ackerman, Josef Jezek, Michael S. Petronis
Summary: The Canadian Superior Province is a key area for studying Late Archean geological processes and mechanisms of rock growth, with a proto-cratonic core and several juvenile terranes. This study of a pluton in northeastern Quebec reveals a two-stage assembly process through analysis of rock structures and tectonic evolution.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Mehmet Arslan, Irfan Temizel, Lukas Ackerman, Cem Yucel, Emel Abdioglu Yazar
Summary: The Cenozoic volcanic rocks from the Eastern Pontides Orogenic Belt in NE Turkey exhibit a wide range of variation in highly siderophile element (HSE) contents and Os isotope compositions, which are related to their mantle sources and magma evolution. Crustal assimilation played an important role in the evolution of the Eocene and Miocene volcanic rocks.
Article
Engineering, Chemical
Jan Mrazek, Sandip Bysakh, Roman Skala, Ales Mracek, Anirban Dhar, Ivo Barton, Ivan Kasik
Summary: A versatile sol-gel approach is presented for the synthesis of nanocrystalline (Eu0.5Y0.5)(2)Ti2O7. The crystallization kinetics, nucleation mechanism, and crystal structure were studied. The results showed a regular distribution of Eu3+ and Y3+ ions and provided key information for tailoring the structural properties of nanocrystalline powders for photonic applications.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lukas Ackerman, Jiri Zak, Karel Zak, Jan Pasava, Vaclav Kachlik, John Hora, Frantisek Veselovsky, Jaroslava Hajna
Summary: The Ediacaran to early Cambrian limestones in the Blovice accretionary wedge demonstrate how paleooceanographic and palaeoenvironmental conditions at active plate margins can be recorded by isotopic composition. Different types of limestones provide insights into various depositional conditions and are linked with paleooceanic and paleogeographic interpretations. Additionally, carbonate-bearing silicate rocks with different elemental and isotopic compositions suggest their common origin at active margins and some of them may have formed through hydrothermal activity.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Lukas Ackerman, Jiri Zak, Vaclav Kachlik, Martin Svojtka, Filip Tomek, Vaclav Santolik, Jiri Slama, Jakub Trubac, Ladislav Strnad, Frantisek Vacek
Summary: This study presents new geochemical and geochronological data for different lithotectonic units in the northeastern part of the Superior Province in Canada, providing insights into crustal growth and tectonic regime during the late Archean. The results suggest a transition from plume-dominated to plate-tectonic regime, representing a significant crustal growth event.
PRECAMBRIAN RESEARCH
(2022)
Article
Geology
Jiri Adamovic, Jaroslav Kukla, Michal Filippi, Roman Skala, Noemi Meszarosova
Summary: A variety of speleothems were found in the crevice and boulder caves of the Elbe River canyon in the Czech Republic. Through mineralogical methods, the different types of speleothems were characterized and their formations were attributed to geologic composition and changing climatic conditions.
INTERNATIONAL JOURNAL OF SPELEOLOGY
(2022)
Meeting Abstract
Geochemistry & Geophysics
R. Skala, N. Meszarosova, S. Matouskova
METEORITICS & PLANETARY SCIENCE
(2023)
Meeting Abstract
Geochemistry & Geophysics
N. Meszarosova, R. Skala
METEORITICS & PLANETARY SCIENCE
(2023)
Meeting Abstract
Geochemistry & Geophysics
N. Meszarosova, R. Skala
METEORITICS & PLANETARY SCIENCE
(2023)
Article
Geochemistry & Geophysics
Noemi Meszarosova, Roman Skala, Petr Mikysek, Milan Drabek
Summary: The study investigated the solid solution between FeS and TiS through synthesis experiments, revealing systematic variation of deficit in metal site occupancy with titanium content in the synthetic samples.
JOURNAL OF GEOSCIENCES
(2021)
Article
Geochemistry & Geophysics
Frantisek Veselovsky, Jan Pasava, Ondrej Pour, Lukas Ackerman
Summary: A detailed study was conducted on the geochemical composition and ore mineralogy of black shales from Chynin, Czech Republic, revealing that they were deposited under strongly reducing conditions and experienced a thermal event in their geological history. The lack of a positive link between organic carbon and redox-sensitive metals, as well as the presence of abundant framboidal pyrite and other sulfide minerals, indicate significant metal and sulfur remobilization processes.
JOURNAL OF GEOSCIENCES
(2021)
