Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Zi-Yue Meng, Peng Gao
Summary: The study reveals different metamorphic paths of metapelites, indicating two decompressional metamorphic events in the Himalayan orogen with changing metamorphic thermobaric ratios over time.
Article
Geology
Zhiqin Xu, Bihai Zheng, Wenbin Zhu, Yanjing Chen, Guangwei Li, Jianguo Gao, Xudong Che, Rongqing Zhang, Haizhen Wei, Weiqiang Li, Guoguang Wang, Guangyi Wei, Haoyu Yan
Summary: The Jiajika pegmatite-type lithium deposit in the southeastern Songpan-Ganze terrane of the eastern Tibetan Plateau is the largest hard-rock lithium deposit in China. The deposit is formed through high-degree fractionation of parent granite magma and strong fluid immiscibility, with two-stage magmatic-hydrothermal events. The S-type granite related to the deposit is emplaced as multi-layer domal sheets and surrounded by pegmatites and meta-sedimentary rocks.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Yingde Jiang, Pavla Stipska, Karel Schulmann, Carmen Aguilar, Sheng Wang, Robert Anczkiewicz, Jian Zhang, Pengfei Li, Francis Chopin
Summary: The study of a representative region in the central part of the Chinese Altai reveals a complex relationship between Barrovian- and Buchan-type metamorphic series, indicating different evolutionary processes of metamorphism in the geological history.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Geology
Fred Gaidies, Freya R. George
Summary: By studying the compositional growth zoning geometry of garnet porphyroblasts in a mica schist, researchers gained insights into the growth rates of individual crystals, departure from equilibrium, and interface mobility. The study found that garnet growth exhibited size-dependent patterns at macroscopic scales, with smaller crystals experiencing decreased growth rates. Additionally, the presence of abundant graphite in the rock matrix may have hindered the mobility of the garnet-matrix interface.
Article
Multidisciplinary Sciences
Alexandra B. Nagurney, Mark J. Caddick, David R. M. Pattison, F. Marc Michel
Summary: The study reveals that garnet crystals are preferentially nucleated on muscovite, leading to oriented relationships between the two minerals. These results highlight the importance of epitaxial nucleation in metamorphic processes and its implications for mineral crystallization and energetics of metamorphic reactions.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
James C. Hower, Jennifer M. K. O'Keefe, Bruno Valentim, Alexandra Guedes
Summary: The contrast in textures between high reflectance vitrinite and liptinite in Ragged edge coal versus regionally metamorphosed anthracites reveals different metamorphic mechanisms at play for these two types of coals.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Chemistry, Multidisciplinary
P. S. Samuel Ratna Kumar, R. Vaira Vignesh, P. M. Mashinini, S. Ramanathan
Summary: The present research focuses on the tribological behavior of a hybrid surface composite based on AA5083 alloy using aluminosilicate and multi-walled-carbon nanotube. Friction stir processing parameters were varied to understand their influence on the tribological characteristics of the hybrid composite. The study found no synergistic interaction between wear rate and friction coefficient, and adhesive wear was identified as the major wear mechanism. The influence of friction stir process parameters on wear rate and friction coefficient was analyzed using mathematical models and optimization algorithms.
Article
Metallurgy & Metallurgical Engineering
Qian Meng, Xiaopei Guo, Tao Li, Bo Shang, Liying Ju, Fucheng Zhang
Summary: The study investigates the formation of MnS-Al2SiO5 complex inclusions at the atomic level using first principles calculation. It is found that MnS forms on the surface of Al2SiO5 and stable structures are analyzed. This research is of great significance for the optimization and stress analysis of steel products.
ISIJ INTERNATIONAL
(2022)
Article
Geology
F. Villares, I. F. Blanco-Quintero, P. S. Reyes, C. Montes, D. Fuentes, A. Cardona, A. Garcia-Casco
Summary: The Peltetec ophiolitic belt in Ecuador's Cordillera Real reveals tectonic slivers of metamorphosed rocks. Two metamorphic events are proposed, with the first event related to ocean-floor metamorphism and the second event associated with the closure of a back-arc basin. The Peltetec fault/shear zone was responsible for displacement and mixing of blocks, but did not cause significant metamorphic recrystallization.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Suparna Tewari, Divya Prakash, Manoj Kumar Yadav, Vedika Srivastava
Summary: The Sikkim Himalaya consists mainly of Proterozoic metapelites and metavolcanics, with a wide range of pressure and temperature in the metamorphic rocks. The rocks in the study area likely resulted from a single metamorphic event with continuous changes in pressure and temperature.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geology
Tanja Knoll, Benjamin Huet, Ralf Schuster, Heinrich Mali, Theodoros Ntaflos, Christoph Hauzenberger
Summary: This article discusses the formation of rare element pegmatite and presents a case study from the Eastern European Alps. It emphasizes that pegmatite is not always related to fertile granite bodies and proposes an alternative model for the formation of Li-rich pegmatite from enriched anatectic melt.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Marco Filippi, Maria Iole Spalla, Nicola Pigazzini, Valeria Diella, Jean-Marc Lardeaux, Davide Zanoni
Summary: Multiscale structural analysis in the central Southalpine domain revealed a complex sequence of pre-Alpine metamorphic assemblages, characterized by late-Variscan foliation, Permian age limit, and formation of andalusite at different temperatures and pressures compared to other Alpine occurrences. This study highlights the unique tectonic significance of andalusite in the upper Val Camonica region.
Article
Geology
Alex Copley, Owen Weller
Summary: This paper discusses the controls on the thermal evolution of continental mountain ranges and the use of pressure and temperature estimates from metamorphic rocks to reconstruct the thermal histories of orogenic belts. The study shows that one-dimensional models can approximate the temperature structure of most continental mountain belts. The direction of approach in P-T space towards the highest-T conditions experienced by a rock is a key diagnostic feature for estimating the thermal and tectonic history of a mountain belt.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Materials Science, Ceramics
Jingyu Wang, Shenghui Xie, Qian Shi, Hongli Wang, Hongzhi Yang, Songsheng Lin, Mingjiang Dai
Summary: An all-solid-state electrochromic device (ECD) was prepared, and the effect of solid electrolyte thickness on opto-electrical performance was investigated. The results showed that surface morphology and looseness significantly influenced the device's properties. Increasing thickness improved ion conductivity and enhanced opto-electrical properties.
CERAMICS INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Kabang'u G. Sakuwaha, Toshiaki Tsunogae, Patson Banda, Chela Changasha, Osbert N. Sikazwe, Yukiyasu Tsutsumi
Summary: The Zambezi Belt in southern Zambia and northern Zimbabwe is part of the Kuunga orogen, associated with the amalgamation of the Gondwana supercontinent. The belt consists of a basement and a supracrustal sequence, with different rock types. Petrographic and geothermobarometry analyses identified the presence of monazite in the crust, and revealed different tectonothermal histories. The rock units were brought together during the collision of the Congo and Kalahari Cratons.
Article
Geosciences, Multidisciplinary
Ewan Russell Webster, David R. M. Pattison
CANADIAN JOURNAL OF EARTH SCIENCES
(2018)
Article
Geology
Jacob B. Forshaw, David J. Waters, David R. M. Pattison, Richard M. Palin, Phillip Gopon
JOURNAL OF METAMORPHIC GEOLOGY
(2019)
Article
Geology
Oliver Beyssac, David R. M. Pattison, Franck Bourdelle
JOURNAL OF METAMORPHIC GEOLOGY
(2019)
Article
Geochemistry & Geophysics
Paul G. Starr, David R. M. Pattison
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2019)
Correction
Geochemistry & Geophysics
D. R. M. Pattison, T. Chacko, J. Farquhar, C. R. M. McFarlane, J. Widney
JOURNAL OF PETROLOGY
(2019)
Article
Geology
Paul G. Starr, David R. M. Pattison, Doreen E. Ames
JOURNAL OF METAMORPHIC GEOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Ewan R. Webster, Douglas A. Archibald, David R. M. Pattison, Jessica A. Pickett, Joel C. Jansen
CANADIAN JOURNAL OF EARTH SCIENCES
(2020)
Review
Geosciences, Multidisciplinary
Manuele Lazzarotto, David R. M. Pattison, Simon Gagne, Paul G. Starr
CANADIAN JOURNAL OF EARTH SCIENCES
(2020)
Article
Geology
M. E. McMechan, K. G. Root, P. S. Simony, D. R. M. Pattison
Summary: Research shows that the Cariboo, northern Selkirk, Purcell, and Rocky Mountains are directly linked to the adjacent North American craton without discernible strike-slip or oblique displacement, confirming their geological connection.
Article
Multidisciplinary Sciences
Alexandra B. Nagurney, Mark J. Caddick, David R. M. Pattison, F. Marc Michel
Summary: The study reveals that garnet crystals are preferentially nucleated on muscovite, leading to oriented relationships between the two minerals. These results highlight the importance of epitaxial nucleation in metamorphic processes and its implications for mineral crystallization and energetics of metamorphic reactions.
SCIENTIFIC REPORTS
(2021)
Article
Geochemistry & Geophysics
Jacob B. Forshaw, David R. M. Pattison
Summary: Fe3+ and XFe3+ are key parameters in phase equilibrium modeling but can only be estimated using certain techniques. Analyses of XFe3+ in different minerals show variations, influenced by the type of Fe-oxide present in the rocks.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geosciences, Multidisciplinary
David R. M. Pattison, Shantal A. Goldsmith
Summary: The metamorphism of the Buchan block in northeast Scotland and its relation to the Barrovian domain to its west have been reassessed using mineral assemblages, microstructures, phase equilibrium modelling, and monazite U-Pb geochronology. The study revealed distinct metamorphic grade zones and different metamorphic field gradients corresponding to mineral assemblage sequences. Monazite U-Pb geochronology confirmed that gneisses in the Buchan block are metamorphosed Dalradian strata rather than older basement gneisses.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Nicole A. Rioseco, David R. M. Pattison, Alfredo Camacho
Summary: This study examines the tectonic features and rock composition of the Purcell anticlinorium and Kootenay arc in the Canadian Cordillera. The Purcell anticlinorium consists of Mesoproterozoic rocks, while the Kootenay arc is composed of Neoproterozoic to Paleozoic strata. The interface between the two domains has undergone different metamorphic and tectonic processes.
CANADIAN JOURNAL OF EARTH SCIENCES
(2022)
Article
Geology
Jacob B. Forshaw, David R. M. Pattison
Summary: Pelites are important rocks for understanding metamorphism due to their widespread occurrence and range of mineral assemblages at different pressure and temperature conditions. A global database of pelite analyses was compiled to determine average composition, examine composition variability, and assess grade-related geochemical changes. The study found that pelites show a decrease in volatile content and XFe3+ with increasing metamorphic grade. Rating: 8/10.
Article
Geology
Jacob B. Forshaw, David R. M. Pattison
Summary: Pelites are the most important rock type for interpreting metamorphism due to their widespread occurrence and range of mineral assemblages at different pressure and temperature conditions. A global database of pelites was compiled to determine their average composition, examine the variability in composition, and assess grade-related geochemical changes. The results show a decrease in volatile content and XFe3+ with increasing metamorphic grade, while SiO2, Al2O3, and A(Ms) values increase in specific metamorphic zones.