Article
Geochemistry & Geophysics
Zheng-wei Qin, Wolfgang Siebel, Jian-ming Fu, Hao Wang, Bo Bao, Yu-shuai Yu, Liang Shan, You-yue Lu, Yuan-Bao Wu
Summary: The early Paleozoic granitoids of the North Qinling Terrane are products of the long-lasting subduction of the Proto-Tethys ocean. Magmatic activity and crustal anatexis occurred simultaneously, with magmatism moving progressively from north to south. These findings are consistent with the roll-back of the Shangdan oceanic slab and transition from an oceanic arc into a back-arc basin setting.
Article
Geochemistry & Geophysics
Xiao-Chun Li, Kui-Feng Yang, Carl Spandler, Hong-Rui Fan, Mei-Fu Zhou, Jia-Long Hao, Yue-Heng Yang
Summary: Isotopic dating studies on the Bayan Obo REE deposit in China show that fluid-assisted modification of monazite and bastnasite results in varied Th-Pb ages, with some representing partial isotopic resetting. The study also suggests resistance of Sm-Nd isotopes but susceptibility of Th-(U)-Pb isotopes to fluid-aided modification, cautioning against younger Th-U-Pb dates in geologically complicated deposits.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Vitor R. Barrote, Oliver Nebel, Ashlea N. Wainwright, Peter A. Cawood, Steven P. Hollis, Massimo Raveggi
Summary: Monazite can serve as a reliable isotopic tracer in petrological and sedimentary studies, providing valuable data for understanding geological processes.
Article
Geosciences, Multidisciplinary
Maria Eugenia Souza, Maximiliano Martins, Glaucia Queiroga, Antonio Pedrosa-Soares, Ivo Dussin, Marco Paulo de Castro, Paula Serrano
Summary: The Neoproterozoic Macaubas basin in southeast Brazil provides important clues to understanding the history of the Sao Francisco - Congo paleocontinent. This study focused on the Early Tonian event, which produced large amounts of bimodal magmas in the region. Through detailed field and laboratory analysis, researchers found that the magmas had different sources and recorded multiple extensional events and aborted continental rifts. However, the mantle plume behind this activity was unable to completely break up the Sao Francisco - Congo paleocontinent.
PRECAMBRIAN RESEARCH
(2022)
Article
Geology
Birger Rasmussen, Jian-wei Zi, Janet Muhling
Summary: The early Paleoproterozoic was a time of significant changes in Earth's climate and surface environment. By studying the supracrustal sequences in the southern Pilbara craton in northwestern Australia, researchers have discovered a previously overlooked pre-Ophthalmia deformational event. This finding provides new insights into the timing and origin of major geological events during this period of global environmental change.
Article
Geosciences, Multidisciplinary
S. Aspiotis, S. Jung, F. Hauff, R. L. Romer
Summary: The study suggests that the Nomatsaus granite was formed in a continent-continent collisional setting with meta-igneous sources of possibly dacitic composition. Partial melting occurred during the initial stages of crustal heating, followed by mid-crustal level melting at higher P-T conditions and relatively late in the orogenic evolution. The petrogenetic model for the Nomatsaus granite is mainly based on the chemical characteristics and isotopic composition of the granite.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Cheng Wang, Yong-Jun Shao, Peter A. Cawood, Jian-Feng Chen, Yi-Qu Xiong, Yue-Jun Wang
Summary: The Renli-Chuanziyuan pegmatite field in South China shows distinct zonation and variation in mineral composition and geochemical characteristics. The in-depth analysis of minerals and isotopes indicates that the formation of the pegmatite deposits is primarily controlled by Rayleigh-type fractional crystallization, and the source rocks are chemically zoned granites.
JOURNAL OF PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Francisco E. Apen, Corey J. Wall, John M. Cottle, Mark D. Schmitz, Andrew R. C. Kylander-Clark, Gareth G. E. Seward
Summary: This study analyzed the U-Pb, Sm-Nd, and Sr isotopes of two potential apatite reference materials (RMs) using isotope dilution and laser ablation techniques. One RM was found to be suitable for U-Pb, Sm-Nd, and Sr measurements, while the other was found to be suitable for Sm-Nd measurements. These findings provide new reference standards for in situ apatite chemical analyses and inter-laboratory calibrations.
Article
Geochemistry & Geophysics
I Jahn, C. Clark, S. Reddy, R. J. M. Taylor
Summary: The Capricorn Orogen in Western Australia records the convergence and collision of the Yilgarn and Pilbara cratons over one billion years, followed by intracontinental reworking. New isotopic analyses suggest that the Glenburgh Terrane may represent a reworked portion of the adjacent cratons. The transition from mantle-derived to crustal-melting dominated granite magmatism reflects a geodynamic evolution from subduction-accretion to collision and intracratonic reworking.
JOURNAL OF PETROLOGY
(2021)
Article
Geology
Victoria Pease, Fitsum G. Yeshanew, Martin J. Whitehouse
Summary: New U-Pb zircon geochronology using high-spatial resolution secondary ion mass spectrometry reveals the crystallization ages of granitoids from the Asir composite terrane in Saudi Arabia; Ages of different periods reflect various tectonic events and crustal evolution, highlighting a significant crustal thickening event around 650 Ma and erosion starting before 625 Ma in this part of the Arabian Shield.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geology
Xing-Hui Li, Hong-Rui Fan, Ri-Xiang Zhu, Kui-Feng Yang, Xue-Feng Yu, Da-Peng Li, Yong-Wen Zhang, Wei-Dong Ma, Kai Feng
Summary: This study investigates the sulfur isotopes and neodymium isotopes of gold deposits in the Jiaodong gold province, showing that the ore-forming fluids share a common origin while also incorporating materials from host rocks. The results suggest intensive fluid-rock interaction plays a significant role in the mineralization process.
ORE GEOLOGY REVIEWS
(2022)
Article
Geology
Mathias Schannor, Cristiano Lana, Gautier Nicoli, Kathryn Cutts, Ian Buick, Axel Gerdes, Lutz Hecht
Summary: The Aracuai orogen in SE Brazil is composed of deformed, metamorphosed, and partly migmatitic sedimentary rocks and granitoid batholiths that formed during the late Neoproterozoic collision of the Sao Francisco and Congo cratons. New petrographic observations and geochronology techniques have been used to constrain peak metamorphic conditions and timing in the orogen, with the results indicating a clockwise P-T evolution characterized by slow burial followed by isothermal decompression. The presence of different protoliths and variations in peak temperatures within different domains of the orogen suggest the role of heat-producing elements as significant heat sources for crustal reworking during West Gondwana convergent tectonics.
JOURNAL OF METAMORPHIC GEOLOGY
(2021)
Article
Chemistry, Analytical
Guo-Qi Liu, Kui-Dong Zhao, Thomas Ulrich, Wei Chen, Di Zhang, Qian Li, He-Dong Zhao, Rong-Qing Zhang, Fei Xia
Summary: The Isoclock software is developed for robust U-Pb dating of accessory minerals using LA-ICP-MS. It focuses on deducting common Pb from reference materials and provides a new common Pb correction method. The software allows the deduction of common Pb in 206Pb, 207Pb, and 208Pb, enabling U/Pb and Th/Pb age calculations. Isoclock has a user-friendly interface and is written in Python, making it versatile and accessible for researchers.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Geosciences, Multidisciplinary
Bradley Cave, William Perkins, Richard Lilly
Summary: This study investigates the mineralization and geochronology of the Mount Novit deposit in Queensland. The results suggest that the Zn-Pb-Ag mineralization at Mount Novit was emplaced during a major thrusting event along the Mount Isa Fault. This finding provides a new model for the synorogenic Zn-Pb-Ag mineralization to the south of Mount Isa.
GEOSCIENCE FRONTIERS
(2022)
Article
Geology
Alexandre Cugerone, Francoise Roger, Benedicte Cenki, Emilien Oliot, Jean-Louis Paquette
Summary: Research in the Boss`ost dome of the Pyrenean Axial Zone has shown that mineralization formation is controlled by Variscan tectonics and associated with a major Variscan remobilization event. The poly-magmatic and metamorphic events in the Pyrenean Axial Zone have unclear relationships with the mineralization.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Thomas Bovay, Pierre Lanari, Daniela Rubatto, Matthijs Smit, Francesca Piccoli
Summary: This study investigates the evolutionary history of the Theodul Glacier Unit (TGU) in the Western Alps using petrography, quantitative compositional mapping, thermodynamic modeling, and garnet dating. The results suggest a mono-metamorphic history with evidence of rapid initial exhumation and subsequent re-heating. The study provides valuable insights into the evolution of collisional orogens.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Geochemistry & Geophysics
D. O. Zakharov, D. R. Zozulya, D. Rubatto
Summary: A newly discovered low-delta O-18 magmatic-hydrothermal system from 2.67 Ga provides a paleogeographic documentation of continental exposure and a quantitative estimate of Neoarchean precipitation. The study showcases the exchange of isotopes between meteoric water and magma at high latitudes.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Cristiano Lana, Guilherme O. Goncalves, Ariela Mazoz, Ian Buick, Sandra Kamo, Ricardo Scholz, Hao Wang, Hugo Moreira, Marly Babinski, Glaucia Queiroga
Summary: This study determined the trace element and isotope composition of Sume apatite from NE Brazil, confirming its suitability as a reference material for LA-ICP-MS analysis.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Andreas Gaertner, Mandy Hofmann, Johannes Zieger, Anja Sagawe, Rita Krause, Marika Stutzriemer, Subani Gesang, Axel Gerdes, Linda Marko, Cristiano Lana, Ulf Linnemann
Summary: Extensive morphological and age studies on detrital zircon grains from modern sands of Namibia reveal complex mechanisms of sediment transport. A large Southern Namibian Sediment Vortex and a modified model of the Orange River sand highway are hypothesized based on the results of this study. The potential impact of spatial variations of erosion rates on sediment movements towards the interior of the continent is also highlighted. Additionally, detrital zircon morphology and large geo-databases are identified as valuable tools for provenance analysis.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geology
Bidyananda Maibam, Richard M. Palin, Axel Gerdes, Richard W. White, Stephen Foley
Summary: The tectonic significance of blueschist-facies rocks associated with the Indo-Myanmar ophiolite belt is uncertain due to the lack of detailed petrological study and reliable age data. This study presents new petrological and geochronological data from the Nagaland complex, northeast India, which provide constraints on the pressure-temperature conditions and ages of metamorphism. The results suggest that the region experienced high-pressure prograde-to-peak metamorphism followed by lower-pressure retrograde metamorphism, with peak metamorphism dated at approximately 95 Ma and retrograde metamorphism at approximately 90 Ma. The study also indicates an exhumation rate of approximately 1 cm/year, consistent with Phanerozoic plate tectonic rates.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
M. Buehler, R. Zurbriggen, A. Berger, M. Herwegh, D. Rubatto
Summary: This study investigates a well-preserved Schlingen structure in the Central Swiss Alps, revealing late Carboniferous peak metamorphic conditions and post-Schlingen transpressional deformation. This is significant for understanding the Variscan evolution and the formation of the Alpine belt.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Francesca Piccoli, Daniela Rubatto, Maria Ovtcharova, Jorg Hermann, Marcel Guillong, Alberto Vitale Brovarone
Summary: Carbonated ultramafic rocks are formed by peridotite serpentinization and carbonation at the seafloor, and studying their metamorphic evolution can provide insights into the history of the subducted ultramafic lithosphere. Perovskite, a mineral found in ophicarbonate rocks, has the potential to be used for geochronology. By analyzing trace elements and dating perovskite in ophicarbonate rocks from two metamorphic terranes in the Alps, it was found that metamorphic perovskite geochronology can provide meaningful U-Pb ages and is a useful tool for dating deformation and fluid flow in the subducted oceanic lithosphere.
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
Multidisciplinary Sciences
Daniel Munoz-Lopez, David Cruset, Jaume Verges, Irene Cantarero, Antonio Benedicto, Vinyet Baques, Xavier Mangenot, Richard Albert, Axel Gerdes, Aratz Beranoaguirre, Anna Trave
Summary: This study applies U-Pb dating and geochemical analysis to fracture-filling calcite veins and host carbonates from the Boixols-Sant Corneli anticline in the Southern Pyrenees. The analysis provides insights into the absolute timing of fracturing and mineralization, the age and duration of fold evolution, and the variations and implications of fluid behavior across the anticline.
Article
Geology
Carlos E. Ganade, Daniela Rubatto, Pierre Lanari, Joerg Hermann, Lucas R. Tesser, Renaud Caby
Summary: This study of ultrahigh-pressure (UHP) rocks reveals a comparable rate of exhumation in the Neoproterozoic and in modern collisional orogens, with significant implications for changes in the atmosphere and biosphere.
Article
Geology
Christophe Real, Kathrin Fassmer, Rodolfo Carosi, Nikolaus Froitzheim, Daniela Rubatto, Chiara Groppo, Carsten Muenker, Simona Ferrando
Summary: This study reveals the important features and evolution history of the middle crust of the Adriatic Sea. By analyzing petrological and geochronological data, various tectonic and thermal events during the early stages of the Alpine rifting were found to be interconnected with the thinning and heating of the middle crust.
JOURNAL OF METAMORPHIC GEOLOGY
(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
Chemistry, Analytical
Yanwen Tang, Na Liu, Jiehua Yang, Guilherme O. Goncalves, Liang Liu, Tingguang Lan, Jianfeng Gao, Junjie Han
Summary: This study proposed and evaluated a potential primary standard, xenotime XN01, for in situ U-Th-Pb dating of bastnaesite. The ages calibrated by XN01 for bastnaesite K-9 were consistent with its reference age, demonstrating the reliability of XN01 as a primary reference material. Additionally, bastnaesite Zagi was identified as a secondary reference material for quality control.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(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, 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
Chemistry, Multidisciplinary
Johanna Marin Carbonne, Andras Kiss, Anne-Sophie Bouvier, Anders Meibom, Lukas Baumgartner, Thomas Bovay, Florent Plane, Stephane Escrig, Daniela Rubatto
Summary: Secondary Ion Mass Spectrometry (SIMS) extracts information about a localized area of a solid target by analyzing secondary ions sputtered from its surface. SIMS can be used in various fields with different types of mass analyzers.
