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
Geosciences, Multidisciplinary
Dov Avigad, Avishai Abbo, Axel Gerdes, Axel K. Schmitt
Summary: The study focuses on detrital zircon from the black sand of the Rhone River delta in southern France, which provides important insights into the major episodes of European magmatism. The results show that the black sand samples represent magmatic events at 0.55 Ga (Cadomian), 0.45 Ga (Cenerian), and 0.31 Ga (Variscan). The Hf isotopes in the zircon suggest the involvement of continuous crustal reworking during European magmatic episodes. However, the oxygen isotope analysis indicates the presence of a significant sedimentary component in the genesis of European granitoids. The study concludes that the prevalent Hf-T-DM ages obtained are mixed and do not confirm the reworking of Mesoproterozoic crust in the region.
Article
Geosciences, Multidisciplinary
Francis Chopin, Remi Lepretre, Mohamed El Houicha, Anne-Sophie Tabaud, Karel Schulmann, Jitka Mikova, Jocelyn Barbarand, Ryma Chebli
Summary: This paper presents new U-Pb geochronological data on granitoids from the Moroccan Meseta Variscan belt. The results show a peak of magmatic activity at 335.2 +/- 0.8 Ma in the Western Meseta and early Visean magmatic activity in the Eastern Meseta. The study also suggests a possible relationship between the magmatic activity and the tectonic events in Northwest Africa. Evaluation: 8 points.
Article
Chemistry, Analytical
Jia-Long Hao, Wei Yang, Sen Hu, Rui-ying Li, Jiang-Long Ji, Hitesh G. Changela, Yang-Ting Lin
Summary: This paper presents a novel Pb-Pb and U-Pb analytical method at a sub-micron scale using a NanoSIMS with a new RF ion source. The technique allows for high spatial resolution but may introduce depth effects, requiring adjustments in the scan area to eliminate mass fractionation. Results from zircon and lunar samples are in good agreement with reference ages within analytical uncertainties.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(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)
Article
Geochemistry & Geophysics
Bidong Zhang, Yangting Lin, Desmond E. Moser, Paul H. Warren, Jialong Hao, Ivan R. Barker, Sean R. Shieh, Audrey Bouvier
Summary: The study examines the geochronology of lunar Mg-suite magmatic rocks, suggesting they originated from mafic intrusions into the anorthositic flotation crust of the lunar magma ocean. Analysis of zircon and baddeleyite indicates a crystallization age of approximately 4.33 billion years for the Mg-suite rocks, which is slightly younger than related ferroan anorthosites.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Oscar Laurent, Simon Couzinie, Luc S. Doucet
Summary: The study reveals the timescales of lower crustal ultra-high temperature metamorphism and the production and transfer of granitic magmas. Zircon petrochronology of felsic and mafic granulite xenoliths from the Variscan eastern French Massif Central shows that these rocks underwent Variscan UHT peak metamorphism at 940-970°C and 8±2 kbar. The zircon U-Pb dates of the felsic granulites range from -315 to -265 Ma, indicating continuous crystallization of zircon upon cooling from the thermal peak. The emplacement of upper crustal granite started at 340 Ma and peaked at 313±3 Ma, reflecting melt extraction along the prograde path of the lower crust. The crystallization ages of mid-crustal migmatites (315-300 Ma) and lower crustal granulites (315-265 Ma) suggest slow cooling in the presence of melt.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Wenhao Zhao, Qiuli Li, Yu Liu, Guoqiang Tang, Xiaoxiao Ling, Jiao Li, Xianhua Li
Summary: Secondary ion mass spectrometry (SIMS) zircon U-Pb dating can be used to determine the absolute ages of magmatic or metamorphic events and distinguish multiple events. This study compiled a dataset of zircon standards dating data to evaluate the long-term external reproducibility and analyzed the uncertainties of single-spot and session analyses.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Marie Pierre Dabard, Alfredo Loi, Pamela Pavanetto, Mattia Alessio Meloni, Natalia Hauser, Massimo Matteini, Antonio Funedda
Summary: This study investigates the sedimentary source areas of the Armorican Massif using U-Pb LA-MC-ICP-MS geochronology on detrital zircons, whole-rock Sm-Nd, and zircon Lu-Hf isotope analysis. It reveals changes in sediment flux characteristics post-Cadomian orogenesis and differences in paleogeographic locations during the Lower Ordovician. The results suggest geological continuity between the Armorican Massif and neighboring massifs, and highlight the importance of accurate sediment provenance analysis for reconstructing paleogeographic affinities.
Article
Geosciences, Multidisciplinary
F. R. Harris, D. P. Moecher, E. Tohver
Summary: This study investigates the zircon ages in clastic units from southwestern Brazil, revealing the collision event between southwest Amazonia and southeast Laurentia during the Grenville orogeny. The results indicate that the clastic rocks during the Grenville period in southwestern Amazonia primarily originated from the magmatic rocks of southeast Laurentia and did not migrate to southwest Amazonia during Rodinian assembly.
Article
Geology
J. Zieger, M. Stutzriemer, M. Hofmann, A. Gaertner, A. Gerdes, L. Marko, U. Linnemann
Summary: Detrital U-Pb zircon age dating and grain morphometrics were used to determine provenance and maximum deposition age in the Lower Permian Dwyka and Middle to Upper Permian Ecca groups in southern Namibia. The results show multiple detrital zircon age populations from different geological periods, suggesting a Gondwana-wide recycling system and significant ash fall input during the Permian. Additionally, the study reveals the evolution duration of the Karasburg and Aranos Basins, with the oldest datable unit from the Dwyka Group having a maximum deposition age of approximately 296 Ma.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geology
Maohui Ge, Zhuang Li, Long Li, Jinjiang Zhang, Kai Liu
Summary: By conducting LA-ICP-MS U-Pb dating on zircons and monazites from granitic gneisses in the Mashan Complex of the Jiamusi Block, the tectonic affinity of the block was investigated. The results indicate a late Pan-African magmatic event and a regional metamorphic event in the Jiamusi Block, supporting its affinity to Gondwana.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
LongXiang Quek, Yu-Ming Lai, Azman A. Ghani, Muhammad Hatta Roselee, Hao-Yang Lee, Yoshiyuki Iizuka, Mohd Rozi Umor, Mark Pecha, Yu-Ling Lin, Rezal Rahmat, Azmiah Jamil
Summary: The geological development history of the Malay Peninsula is complex, and the different Hf isotopic compositions of magmatic zircons in different regions reflect different geological evolutionary processes, revealing the trajectory of supercontinent evolution.
Article
Geochemistry & Geophysics
Hu Tang, Qiuli Li, Yu Liu, Yonghong Shi
Summary: This study investigated age deviations in SIMS zircon core-rim U-Pb dating caused by overlapping pre-sputtered areas. The results showed that overlapping areas can affect apparent dates for zircon rims, leading to erroneous dating of metamorphic zircon rims and potentially impacting the duration of geological events.
Article
Geosciences, Multidisciplinary
Hugo K. H. Olierook, Christopher L. Kirkland, Milo Barham, Matthew L. Daggitt, Julie Hollis, Michael Hartnady
Summary: The study presents a technique to rapidly extract meaningful core model ages from core-rim mixtures, along with a Python-based program for easy application of this approach. The efficacy of the technique is demonstrated on a detrital sample from East Greenland, recovering dates of detrital cores from core-rim mixtures. Caution is advised against using this technique without checking the appropriateness of the underlying assumptions, and chemical means are provided for evaluating the assumptions.
Article
Geochemistry & Geophysics
Navot Morag, Tzahi Golan, Yaron Katzir, Matthew A. Coble, Kouki Kitajima, John W. Valley
JOURNAL OF PETROLOGY
(2020)
Review
Geochemistry & Geophysics
E. F. Rose-Koga, A. -S. Bouvier, G. A. Gaetani, P. J. Wallace, C. M. Allison, J. A. Andrys, C. A. Angeles de la Torre, A. Barth, R. J. Bodnar, A. J. J. Bracco Gartner, D. Butters, A. Castillejo, B. Chilson-Parks, B. R. Choudhary, N. Cluzel, M. Cole, E. Cottrell, A. Daly, L. V. Danyushevsky, C. L. DeVitre, M. J. Drignon, L. France, M. Gaborieau, M. O. Garcia, E. Gatti, F. S. Genske, M. E. Hartley, E. C. Hughes, A. A. Iveson, E. R. Johnson, M. Jones, T. Kagoshima, Y. Katzir, M. Kawaguchi, T. Kawamoto, K. A. Kelley, J. M. Koornneef, M. D. Kurz, M. Laubier, G. D. Layne, A. Lerner, K. -Y. Lin, P. -P. Liu, A. Lorenzo-Merino, N. Luciani, N. Magalhaes, H. R. Marschall, P. J. Michael, B. D. Monteleone, L. R. Moore, Y. Moussallam, M. Muth, M. L. Myers, D. F. Narvaez, O. Navon, M. E. Newcombe, A. R. L. Nichols, R. L. Nielsen, A. Pamukcu, T. Plank, D. J. Rasmussen, J. Roberge, F. Schiavi, D. Schwartz, K. Shimizu, J. B. Thomas, G. T. Thompson, J. M. Tucker, G. Ustunisik, C. Waelkens, Y. Zhang, T. Zhou
Summary: Mineral-hosted melt inclusions are crucial for understanding magmatic processes, necessitating guidelines for data collection and reporting to ensure quality and consistency. Erik Hauri made significant contributions to the study of melt inclusions and was honored posthumously at a workshop dedicated to his memory.
Article
Geochemistry & Geophysics
Tenley J. Banik, Tamara L. Carley, Matthew A. Coble, John M. Hanchar, Justin P. Dodd, Gabriele M. Casale, Sean P. McGuire
Summary: The study of zircon-based U-Pb geochronology, trace element concentrations, and O and Hf isotope compositions for Sn AE fell volcano in eastern Iceland reveals a long history of the magmatic system originating from mantle-derived basalt.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
A. A. Tsygankov, V. B. Khubanov, O. Udoratina, M. A. Coble, G. N. Burmakina
Summary: The Mongolian-Transbaikalian volcanoplutonic belt in northern Mongolia and Transbaikalia hosts hundreds of plutons formed between 280-270 and 230-210 Ma, including the giant Sherbakhta pluton consisting of AFS syenites and peralkaline granites. The isotopic and geochemical characteristics suggest that the parental melt underwent fractional crystallization to form residual ferroan peralkaline graniticmelt in an intermediate chamber. This A-type granitoids in the Transbaikalia region formed in an intracontinental geodynamic setting due to the impact of a mantle plume on the heated plastic crust of a young orogen.
Article
Geography, Physical
Shalev Siman-Tov, Terrence Blackburn, Bernard Hallet, Matthew A. Coble, Emily E. Brodsky
Summary: The study presents detailed chemical and isotopic data of a subglacial siliceous deposit on recently exposed andesitic bedrock. The deposit, dating back to 10-20 ka, has persisted despite erosion and weathering, indicating distinct formation episodes due to hydrology and water chemistry changes. The findings reinforce the idea that subglacial chemical deposits play a role in Earth's geochemical cycles and climate system on geological time scales.
JOURNAL OF GLACIOLOGY
(2021)
Article
Geosciences, Multidisciplinary
S. D. Burgess, M. A. Coble, J. A. Vazquez
Summary: The study reveals that the volcanic activity in the Coso volcanic field has a relatively short duration, with eruption pulses occurring during the marine isotope stage 5 interglacial period. The volume of volcanic rock shows an increasing trend from 200 ka to 78 ka, and geochemically distinct magma erupted in close geographic proximity may come from different magma systems.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Geology
Tzahi Golan, Yaron Katzir, Matthew A. Coble
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
R. L. Hampton, I. N. Bindeman, R. A. Stern, M. A. Coble, S. M. Rooyakkers
Summary: This study investigates the origin of rhyolitic magmas in the Krafla Central Volcano in Iceland, utilizing oxygen isotope and geochemical analyses. The research suggests that the petrogenesis of rhyolitic magma at Krafla may involve at least two steps, influenced by prior hydrothermal alteration of the surrounding crust.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Geochemistry & Geophysics
Marcel Mizera, Tim Little, Carolyn Boulton, Yaron Katzir, Nivedita Thiagarajan, David J. Prior, James Biemiller, Euan G. C. Smith
Summary: By combining stress inversion of fault-slip data and paleostress analysis with microstructural and clumped-isotope geothermometry, this study constrains a sequence of deformation stresses and temperatures, providing insights into the stress evolution in the footwall of the active Mai'iu low-angle normal fault.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Dale H. Burns, Shanaka L. de Silva, Phil Shane, Matthew A. Coble
Summary: Our understanding of magmatism in the New Zealand North Island subduction system is limited by our knowledge of the deep arc crust, particularly in the northern Taupo Volcanic Zone (NTVZ). This study uses detailed analysis of crystalline phases and melt inclusions to investigate the magmatic processes occurring in the lower crust beneath Putauaki in the NTVZ. The findings suggest a multi-stage evolution in the lower crust, with deep assimilation of isotopically enriched lower crust and subsequent ascension of evolved melts into the lower crust.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Andrew Tholt, Sean R. Mulcahy, William C. McClelland, Sarah M. Roeske, Vinicius T. Meira, Patricia Webber, Emily Houlihan, Matthew A. Coble, Jeffrey D. Vervoort
Summary: The Mesoproterozoic MARA terrane of western South America is a composite igneous-metamorphic complex important for paleogeographic reconstructions and understanding the relative positions of Laurentia and Gondwana. While the magmatic and detrital records suggest a Laurentian origin, the metamorphic and deformation records lack detail to determine the correlation of units within the MARA terrane and the timing of accretion to the Gondwana margin. Regional mapping and geochronology from northwest Argentina indicate that the region preserves four distinct litho-tectonic units of varying ages and metamorphic conditions.
Article
Geochemistry & Geophysics
Tenley J. Banik, Matthew A. Coble, Calvin F. Miller, Christopher M. Fisher, Brennan T. Jordan, Jeffrey D. Vervoort, Tamara L. Carley
Summary: Iceland's oldest silicic rocks provide valuable insights into the island's early crustal evolution. Through zircon U-Pb ages, trace element and isotopic compositions, and whole rock Nd, Hf, and Pb isotopes, we studied the petrogenesis of silicic magmatic centers in the northern Westfjords. Our data confirm the age of Hrafnsfjorour as the oldest central volcano in Iceland (about 14 Ma) and provide an older age for Arnes (about 13 Ma) than previously estimated. The isotopic compositions of different locations suggest a complex interaction between the rift system and mantle plume, highlighting the heterogeneity of the Icelandic mantle.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Karolina Kosminska, Kathrin Fassmer, William C. McClelland, Jaroslaw Majka, Matthew Coble, Jay Thomas, Maciej Manecki, Henning Lorenz, Jakub Bazarnik, Carsten Muenker
Summary: The study investigates the presence of monazite in high-pressure low-temperature rocks and its forming reaction using pressure-temperature estimates and dating techniques. Monazite in the eclogite is believed to have formed under high-pressure conditions due to the decomposition of accessory phases, while monazite in the blueschist reflects the prograde growth of garnet. The results provide evidence for an early Ordovician subduction system and support the mixed provenance of southwestern Svalbard.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Mineralogy
Jane A. Gilotti, William C. McClelland, Simon Schorn, Roberto Compagnoni, Matthew A. Coble
Summary: In this study, an eclogite-facies orthogneiss and host paragneiss were analyzed to understand the protolith, provenance, and metamorphic ages of the Eclogitic Micaschist Complex. The orthogneiss contains jadeite with quartz, phengite, K-feldspar, garnet, rutile, and zircon, while the paragneiss hosts garnet, jadeite, phengite, glaucophane, epidote, rutile, and quartz. The zircon from the orthogneiss shows oscillatory-zoned cores and complex rims, with ages suggesting an Ordovician igneous protolith and eclogite facies growth. The paragneiss contains detrital zircons indicating a Neoproterozoic origin and an Edicaran depositional age.
EUROPEAN JOURNAL OF MINERALOGY
(2023)
