Article
Biology
Karin Holmfeldt, Emelie Nilsson, Domenico Simone, Margarita Lopez-Fernandez, Xiaofen Wu, Ino de Bruijn, Daniel Lundin, Anders F. Andersson, Stefan Bertilsson, Mark Dopson
Summary: Investigating the deep terrestrial virosphere reveals unique viral communities associated with Firmicutes and Patescibacteria, impacting ecological dynamics through viral predation and nutrient recycling. The presence of 'kill-the-winner' oscillations and 'boom and burst' cycles suggest complex interactions within deep groundwater ecosystems.
COMMUNICATIONS BIOLOGY
(2021)
Article
Geosciences, Multidisciplinary
R. Lahtinen, P. E. Salminen, M. Sayab, H. Huhma, M. Kurhila, S. T. Johnston
Summary: The Paleoproterozoic oroclines in Fennoscandia are crucial for the formation of continental equidimensional crust during the Svecofennian orogeny. The study suggests that the 1.90-1.88 Ga arc rocks in south-central Finland originally formed a linear arc system represented by the Bothnian and Saimaa oroclines. Through a regional large-scale approach, combined with geochronological age determinations and field-based structural studies, a comprehensive understanding of the tectonic evolution of the Saimaa orocline is established. The formation of the Saimaa orocline was influenced by NE-SW collision, subduction reversal, and arc magmatism, followed by a widespread collisional event. The Bothnian and Saimaa oroclines exhibit different characteristics due to variations in crustal rigidity and orientation of folding.
PRECAMBRIAN RESEARCH
(2022)
Article
Geochemistry & Geophysics
Alexandra V. Stepanova, Pavel Azimov, Alexander V. Samsonov, Svetlana V. Egorova, Irina I. Babarina, Alexander N. Larionov, Yulia O. Larionova, Anna V. Kervinen, Vladimir S. Stepanov
Summary: This study of the Pechnoy mafic layered sill in the Belomorian province provides new insights into the characteristics of mafic rocks enriched in chlorine elements and originating approximately 2.2 billion years ago, with preserved primary magmatic features. The rocks show signs of in situ fractional crystallization and a common mantle source for ca. 2.2 Ga igneous rocks in the Fennoscandian Shield.
Article
Geosciences, Multidisciplinary
Qinlong Tong, Ziying Li, Honghai Fan, Naser Jahdali, Mubarak M. Al-Nahdi
Summary: This article mainly introduces the Jabal Hadb Ad Dayheen granitic complex in central Saudi Arabia, which is an alkaline granitic ring complex associated with a collapsed caldera. The granitic suites consist of metalminous-peralkaline A-type granites, and the zircon U-Pb analysis shows that the ages of the different granitic rocks range from 596 Ma to 613.3 Ma. The petrological characteristics and regional tectonic evolution suggest that the formation of the Dayheen Ring Complex went through four different periods.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Oleg I. Volodichev, Oleg A. Maksimov, Tatiana I. Kuzenko, Alexander I. Slabunov
Summary: This study reports on the first finding of omphacite inclusions in 2.68 Ga metamorphic zircons from eclogites from the Gridino eclogite-bearing melange. The zircons with decisive features provide evidence for an Archean eclogite-facies metamorphism.
Article
Geology
Ross N. Mitchell, Christopher J. Spencer, Uwe Kirscher, Simon A. Wilde
Summary: The interpretation of the oldest preserved crustal archive, the Jack Hills zircon in Western Australia, has been controversial in terms of the onset of plate tectonics. Time-series analysis on hafnium isotopes of the zircon reveals cycles reminiscent of plate-tectonic subduction, suggesting similarities between early Earth and present-day conditions. However, these cycles could also imply that modern plate-tectonic subduction inherited preexisting mantle convection cycles. Overall, any model for plate tectonics must consider the conditions operating during the Hadean time.
Article
Biology
George Westmeijer, Maliheh Mehrshad, Stephanie Turner, Linda Alakangas, Varvara Sachpazidou, Carina Bunse, Jarone Pinhassi, Marcelo Ketzer, Mats Astrom, Stefan Bertilsson, Mark Dopson
Summary: This study found that the microbial communities in deep biosphere groundwaters are mainly comprised of autochthonous species, rather than migratory surface representatives.
COMMUNICATIONS BIOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Fabio Santos Pereira, Herbet Conceicao, Maria de Lourdes Silva Rosa, Moacyr Moura Marinho, Colombo Celso Gaeta Tassinari, Joao Marinho Milhomem Neto, Jean -Michel Lafon
Summary: This study investigates the Neoproterozoic plutonic rocks in the Sergipano Orogenic System (SOS) in the southern Borborema Province, NE Brazil, to understand their sources, petrogenesis, and tectonic setting. Three magmatic episodes are identified, reflecting the evolutionary stages of the orogen. The rocks in each episode exhibit distinct compositions and origins, including metasomatism of the lithospheric mantle, partial melting of graywacke protoliths, and reworking of ancient lower mafic crust.
GEOSCIENCE FRONTIERS
(2023)
Editorial Material
Geochemistry & Geophysics
Sergey G. Skublov, Aleksey V. Berezin, Laysan I. Salimgaraeva
Summary: The study reports the first finding of omphacite inclusions in metamorphic zircons from the Belomorian Mobile Belt, suggesting evidence for Archean eclogite-facies metamorphism. However, the authors argue that the age estimation of the garnets in previous studies was incorrect and propose a different interpretation related to Archean high-pressure granulite-facies metamorphism.
Article
Geology
Qiong-Yao Zhan, Di-Cheng Zhu, Roberto F. Weinberg, Qing Wang, Jin-Cheng Xie, Liang-Liang Zhang, Zhi-Dan Zhao
Summary: Apatite, commonly found in various rocks, is a powerful tool for studying element partition between apatite and melt. Experimental data shows that melt composition strongly controls the partition of MgO in apatite. Contrasting behaviors of apatite MgO in volcanic and plutonic rocks provide insights into the debate about volcanic-plutonic connection.
Article
Geochemistry & Geophysics
Pablo Farias, Roberto F. Weinberg, Alfonso Sola, Melanie Finch
Summary: U-Pb dating of zircon, monazite, and titanite combined with trace element composition is used to characterize the thermal evolution of the migmatitic Agua del Sapo complex. The complex experienced two consecutive early Paleozoic orogenies, associated with subduction and melting at upper-amphibolite facies. The accessory phases of detrital zircon, monazite, and titanite record different growth and dissolution-precipitation events during these orogenies. The prolonged high heat flow until 380 Ma blurs the boundary between the Famatinian and the subsequent Achalian/Chanic orogenies.
Article
Geosciences, Multidisciplinary
P. Vermeesch, A. G. Lipp, D. Hatzenbuehler, L. Caracciolo, D. Chew
Summary: Varietal studies of sedimentary provenance involve analyzing the properties of minerals or mineral groups. Multidimensional Scaling (MDS) can be used to analyze this type of data and treat it equally with other provenance proxies. The paper introduces three methods to measure the dissimilarity between samples in order to apply MDS to varietal data.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Review
Geosciences, Multidisciplinary
Hilmar Bungum, Olav Eldholm
Summary: A review of paleoseismicity in areas covered by ice sheets in Fennoscandia and North America during the early Holocene suggests that ice removal during deglaciation led to a Glacial Isostatic Adjustment response, supported by observational data and numerical modeling. This climate-earthquake relationship is primarily influenced by the state of the lithosphere and asthenosphere, as well as the climate conditions. The changing ice load affects the viscoelastic Earth response and stress, potentially causing crustal earthquake ruptures and reactivating old structural features.
EARTH-SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
Helena Osterholz, Stephanie Turner, Linda J. Alakangas, Eva-Lena Tullborg, Thorsten Dittmar, BirgittaE. Kalinowski, Mark Dopson
Summary: The deep terrestrial biosphere encompasses life below the photosynthesis-fueled surface that survives in nutrient and energy depleted anoxic groundwaters. This study reveals the presence of terrestrially-sourced carbon in deep continental groundwater and its support for deep microbial life.
NATURE COMMUNICATIONS
(2022)
Article
Geology
Tamara B. B. Bayanova, Ayya V. V. Bazay, Ekaterina N. N. Steshenko, Evgeniy L. L. Kunakkuzin, Pavel A. A. Serov, Elena S. S. Borisenko, Dmitry V. V. Elizarov
Summary: This paper investigates the noble-metal mineralization in Algoma-type BIFs of the Fennoscandian Shield and provides new isotope (Nd-Sr, U-Pb) data and analysis using U-Pb dating. The results show that the formation of noble-metal minerals occurred between the formation of basalt protolith and metamorphism in BIFs, and it is found that reducing fluids play an important role in the redistribution of iron and rare earth elements in BIFs.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Christian Tegner, Torgeir B. Andersen, Hans Jorgen Kjoll, Eric L. Brown, Graham Hagen-Peter, Fernando Corfu, Sverre Planke, Trond H. Torsvik
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2019)
Article
Geosciences, Multidisciplinary
Hadi Shafaii Moghadam, Fernando Corfu, Robert J. Stern, Ali Lotfi Bakhsh
JOURNAL OF THE GEOLOGICAL SOCIETY
(2019)
Article
Geosciences, Multidisciplinary
Jiri Konopasek, Robert Anczkiewicz, Petr Jerabek, Fernando Corfu, Eliska Zackova
JOURNAL OF THE GEOLOGICAL SOCIETY
(2019)
Article
Geochemistry & Geophysics
Alexei V. Ivanov, Ivan V. Levitskii, Valery I. Levitskii, Fernando Corfu, Elena I. Demonterova, Leonid Z. Reznitskii, Ludmila A. Pavlova, Vadim S. Kamenetsky, Valery M. Savatenkov, Vladislav I. Powerman
Article
Geology
Ana M. R. Neiva, Antonio Moura, Carlos A. Leal Gomes, Manuel Francisco Pereira, Fernando Corfu
JOURNAL OF IBERIAN GEOLOGY
(2019)
Article
Geochemistry & Geophysics
Hans Jorgen Kjoll, Torgeir B. Andersen, Fernando Corfu, Loic Labrousse, Christian Tegner, Mohamed Mansour Abdelmalak, Sverre Planke
Article
Geosciences, Multidisciplinary
F. Corfu, M. Heim
JOURNAL OF THE GEOLOGICAL SOCIETY
(2020)
Article
Geosciences, Multidisciplinary
Shahryar Mahmoudi, Fernando Corfu
Summary: The composite Poshteh Pluton in eastern Iran is located at a critical tectonic junction and is part of the Central Iranian Microplate. It consists of two distinct intrusions and is positioned south of the inferred main Paleotethys suture and along the Doruneh Fault system. The quartz monzonite in the Pluton has been dated to 215.8 +/- 0.5 Ma, which coincides with the closure of the Paleotethys during the late stages of the Eo-Cimmerian Orogeny. It is similar to coeval plutons along the Paleotethys suture and likely formed through disruption processes during the Mesozoic and Cenozoic. The Pluton was subsequently invaded by granite at 41.23 +/- 0.31 Ma, associated with structural control and hydrothermal alteration. This granite is part of a late Eocene to Oligocene plutonic suite in the region and formed through subcontinental lithosphere delamination and melting.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Kenneth Warvik, Hakon Blaker Ringstad, Lars E. Augland, Fernando Corfu, Roy H. Gabrielsen
Summary: The Caledonian Orogen preserves the complete record of a Wilson cycle, and Revsegg Allochthon is an understudied example in the southern Scandinavian Caledonides that illustrates the key temporal and tectonic stages in the cycle.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Fernando Corfu, Torgeir B. Andersen
Summary: The break-up of continents can lead to the formation of dyke swarms, basins, and hyperextension assemblages. The Nalfjell Complex in northern Norway has the characteristics of a hyperextension assemblage, including serpentinite bodies embedded in various rocks. The ages and evolution of the Nalfjell Complex differ from other structural units in the region.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geochemistry & Geophysics
Ariela Mazoz, Guilherme O. Goncalves, Cristiano Lana, Ian S. Buick, Fernando Corfu, Sandra L. Kamo, Hao Wang, Yue-Heng Yang, Ricardo Scholz, Glaucia Queiroga, Bin Fu, Lorena Martins, Mathias Schannor, Adriana Tropia de Abreu, Marly Babinski, Eliza Peixoto, Roberto Ventura Santos
Summary: The Khan River and Bear Lake titanites were investigated as potential reference materials for LAICP-MS applications. Both titanites showed consistent U-Pb and Nd-isotope ratios, but the Khan River titanite exhibited heterogeneity in texture and composition.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Tor Grenne, Deta Gasser, Reidulv Boe, Fernando Corfu, Oyvind Skar, Trond Slagstad
Summary: This study presents a revised stratigraphic and tectonomagmatic model for the Holonda area, based on remapping, sedimentology, igneous geochemistry, isotopes, and geochronology. The findings suggest that the region experienced arc-continent collision, subduction polarity flip, and rifting, leading to the opening of a wide basin. The study provides valuable insights into the Caledonian orogen and the central Mediterranean tectonic models.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2023)
Article
Geosciences, Multidisciplinary
Sascha Zertani, Luca Menegon, Giorgio Pennacchioni, Iris Buisman, Fernando Corfu, Bj orn Jamtveit
Summary: Deformation of the continental crust is influenced by various factors, including pre-existing structural framework, fluid availability, strain rate, and pressure-temperature conditions. By investigating the evolution of a large shear zone in Lofoten, Norway, we found that deformation occurred through multiple metamorphic stages and mechanical heterogeneities influenced the deformation style and fluid channelization.
JOURNAL OF STRUCTURAL GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Ariela Mazoz, Guilherme O. Goncalves, Cristiano Lana, Ian S. Buick, Fernando Corfu, Sandra L. Kamo, Hao Wang, Yue-Heng Yang, Ricardo Scholz, Gloucia Queiroga, Bin Fu, Lorena Martins, Mathias Schannor, Adriana Tropia de Abreu, Marly Babinski, Eliza Peixoto, Roberto Ventura Santos
Summary: The titanites from Khan River and Bear Lake were investigated as potential reference materials for LA-ICP-MS applications. Both titanites showed consistent U-Pb and Nd-isotope ratios, making them suitable for Nd-isotope analyses.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Geochemistry & Geophysics
Carly Faber, Holger Stunitz, Deta Gasser, Petr Jerabek, Katrin Kraus, Fernando Corfu, Erling K. Ravna, Jiri Konopasek