Article
Geochemistry & Geophysics
Cheng-Wei Zhang, Yang Yang, Yi-Can Liu, G. Groppo, F. Rolfo
Summary: Metamorphosed granitic rocks in continental collisional terranes are important for understanding the metamorphic evolution of deeply subducted continental crust. This study reconstructs the three-stage metamorphic evolution of metamorphosed garnet-bearing granitic rocks in the central Dabie UHP metamorphic zone (CDZ), using a multidisciplinary approach. The study reveals the presence of ultrahigh pressure (UHP) and ultrahigh temperature (UHT) metamorphic events in these rocks, providing new constraints on the metamorphic evolution and exhumation processes of deeply subducted granitic rocks during continental collision.
Article
Geosciences, Multidisciplinary
Lei Yang, Jia-Min Wang, Xiao-Chi Liu, Gautam P. Khanal, Fu-Yuan Wu
Summary: The behavior of radiogenic isotopes during the melting of metasediments is influenced by the source and temperature of the melt. During the melting process, muscovite preferentially enters the melt relative to plagioclase, resulting in variation in Sr isotopes. In addition, the incomplete dissolution of zircon and the higher crystallization temperature result in the leucosome having Nd and Hf isotopes compositions closer to the source.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geology
Haiqi Yuan, Jian Wang, Keiko Hattori, Yanchen Yang, Jinlin Liu, Zhipeng Xie
Summary: The translation mentions that the Yangkou area in the Sulu ultrahigh pressure metamorphic belt records three stages of metamorphism, which is of great importance for understanding the influence of plate tectonics on the continental crust.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Ridong Yu, Jinggui Sun, Shu Wang, Jilong Han, Yang Liu
Summary: The study of Neoarchean granitic rocks in the Jiapigou area of Jilin Province reveals that they are mainly composed of biotite granitic gneiss and medium- to coarse-grained granite, with high potassium and high calcium-alkaline to shoshonite characteristics. Zircon analysis suggests that these rocks formed during intracrustal recycling processes in the late Neoarchean and early Paleoproterozoic, with origins from remelting of early Neoarchean crustal rocks.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Penglei Liu, Zhenmin Jin
Summary: This study investigated the metamorphic evolution of a tremolite marble from the Dabie ultrahigh-pressure terrane in China by analyzing zircon. The zircon in the marble experienced a complex recrystallization and growth history under different facies conditions. The mineral inclusions in zircon provided insights into the formation environment and metamorphic processes. The U-Pb dating of zircon yielded a wide age range, indicating prolonged subduction and exhumation during the Triassic period.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Aiqing Ren, Zaicong Wang, Keqing Zong, Zhaochu Hu, Huai Cheng, Xiang Wang, Wen Zhang, Weijun Chen
Summary: Refertilization of fertile garnet lherzolites occurs during peak-UHP metamorphic stages in a continental subduction channel, as shown by the presence of abundant clinopyroxene and garnet, low Mg# and high Al2O3. The metasomatic agents for refertilization are likely basaltic-intermediate melts incorporating continental materials.
Article
Geochemistry & Geophysics
Yu He, Wen-Xiang Zhang, Yu-Jie Zhao, Pan Hu, Huan Chang, Yuan-Bao Wu
Summary: Through the petrochronological study of plagioclase-bearing felsic dikes, it was determined that the North Qinling orogen experienced early exhumation at an age of 490+/-2 Ma. This suggests that the North Qinling orogen is a fast exhumation high-pressure and ultrahigh-pressure terrane, likely influenced by regional tectonic evolution.
Article
Geology
Yan Zhao, Wubin Yang, Chengbiao Leng, Qiang Shan, Hecai Niu, Ningbo Li
Summary: This study investigates the rare earth element (REE) behavior in zircon from the marginal zone of a granitic pegmatite in Xinjiang, China. The REE anomalies in zircon can be attributed to the sequestration of cerium and the crystallization of heavy REE-enriched minerals. The M-type lanthanide tetrad effects observed in zircon, garnet, and the host granite are likely due to exsolution and interaction with magmatically derived fluids.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Zhu Shaogong, Liang Yingjie, Zhang Yuquan, Li Zian
Summary: By analyzing the paragneiss from Xinxian area along the west edge of the Dabie-Sulu ultrahigh-pressure metamorphic belt, it is revealed that the protolith of the paragneiss may be formed by terrestrial materials, and it was formed later than the Triassic, with the main protolith age falling between 705-811 Ma.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Xiang-Li Ding, Lin Ding, Chao Wang, Hou-Qi Wang, Xu-Dong Guo
Summary: The Linzizong volcanic successions in the western Lhasa Terrane were a magmatic response to the tectonic transition from Neo-Tethyan oceanic subduction to the India-Asia collision. Zircon U-Pb ages of rhyolitic samples from the Shiquanhe region suggest that part of the Zenong Group erupted during the Late Palaeocene, indicating intense Early Cenozoic crustal growth in the region.
GEOLOGICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
Peng-Peng Yu, Roberto F. Weinberg, Yi Zheng, Melanie A. Finch
Summary: This paper focuses on the U-Pb ages and Lu-Hf isotopes in zircons in a long-lived anatectic terrane, to understand both the nature of melting events and controls on Hf-isotope ratios in the zircon record.
Article
Geochemistry & Geophysics
Ming-Jian Li, Yun-Chuan Zeng, Massimo Tiepolo, Federico Farina, Ji-Feng Xu, Feng Huang, Xi-Jun Liu, Qin Chen, Yuan Ma
Summary: This study investigates the mechanism of recycling pre-existing continental crustal materials into the source of mantle-derived magma. The results show that the magmatic zircons have heterogeneous Hf isotopic characteristics, but there are no ancient zircon xenocrysts, implying limited upper crustal contamination. Additionally, the high Zr/Y ratios and the absence of negative Zr-Hf anomalies suggest a high surface temperature of the down going slab.
AMERICAN MINERALOGIST
(2023)
Article
Geology
HongJin Chen, YanJing Chen
Summary: This study investigates the giant Shapinggou porphyry molybdenum deposit in Jinzhai county, Anhui province. New zircon U -Pb age data and element geochemistry analysis are used to determine its formation age, rock type, and tectonic setting. The results show that the deposit has the characteristics of a collision-type porphyry molybdenum deposit, with molybdenum mineralization closely associated with late-stage shallow-seated granitic intrusions or breccia pipes. Furthermore, the study provides new insights into the crustal source and formation mechanism of the deposit.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Junyu Li, Shuyun Cao, Xuemei Cheng, Lei Jin, Meixia Lyu
Summary: Granitic pegmatites formed along the Ailao Shan-Red River shear zone (ASRR-SZ) in Southeast Asia at 28-23 Ma during left-lateral shearing. They are characterized by high SiO2 (65.6%-76.2%), moderate K2O (2.6%-7.4%), low MgO (0.1%-0.3%), and high differentiation index (DI = 82.4-95.3). Zircon geochemistry suggests a crustal origin, and the pegmatites formed during transpressional deformation with temperatures around 621-860℃ and fluid trapping temperatures of 180-350℃.
Article
Geosciences, Multidisciplinary
Yingdi Pan, Xiumian Hu
Summary: Detrital geochronology, combined with zircon Hf isotopes, has been used to study the sedimentary sources and evolutionary history of the Western Qinling-Songpan tectonic junction in central China. A dataset of 20,640 zircon U-Pb ages and 1,636 zircons with Hf isotopic data from 281 sandstone samples was obtained. The compiled data can be used in various research fields, such as provenance analysis, climate change, and paleogeographic reconstruction.
GEOSCIENCE DATA JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Uri Shaanan, Dov Avigad, Navot Morag, Talip Gungor, Axel Gerdes
Summary: The Cenozoic geodynamics of the northeastern Mediterranean Basin have been influenced by the subduction of the African Plate under Eurasia, leading to the formation of the Misis-Kyrenia Thrust System which dissects the structural pattern of northern Cyprus. The detrital zircon and rutile U-Pb geochronology analysis of the Kythrea flysch revealed two different sediment transportation systems over different geological periods, providing insights into the source areas and characteristics of the sediments.
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
Geosciences, Multidisciplinary
Navot Morag, Dov Avigad, Axel Gerdes, Avishai Abbo
Summary: The Miocene continental basins in Israel and Jordan preserve remnants of a continental-wide fluvial system originating in Arabia, with distinct sedimentary provinces in the north and south showing differences in detrital zircon age spectra. The detrital zircon U-Pb-Hf signal of the Israeli Miocene clastic units differs from that of the River Nile, indicating separate fluvial systems on the eastern side of the Red Sea and the western side drained by the River Nile.
Article
Multidisciplinary Sciences
Nicolai Schleinkofer, Jacek Raddatz, David Evans, Axel Gerdes, Sascha Floegel, Silke Voigt, Janina Vanessa Buescher, Max Wisshak
Summary: Acesta excavata, a slow-growing bivalve from the Limidae family, shows compositional variability in elemental ratios, indicating strong vital effects and associations with seawater temperature and salinity. Additional techniques, such as clumped isotopes, are recommended to accurately determine and quantify these effects.
Article
Geochemistry & Geophysics
G. Zulauf, A. Gerdes, E. Hattingen, H. E. Hoefer, F. Loeckle, H. R. Marschall, H-D Nesbor, R. Petschick, T. Reischmann, H. Schmeling, J. Zulauf
Summary: This study presents geochronological, thermobammetric, and computertomographic data from a composite sill in the Weschnitz pluton. The quartzmonzodiorite wall rock, intruded at deep structural levels, was quickly cooled to solidus temperature before being cut by a spessartite sill. The rapid formation of Sederholm-type composite veins is attributed to suction-induced migration of contact melt from the wall rock to the cooling sill.
Article
Geochemistry & Geophysics
Damaris Montano, Marta Gasparrini, Axel Gerdes, Giovanna Della Porta, Richard Albert
Summary: The Nordlinger Ries Crater in Southwest Germany, formed by a meteorite impact in the Miocene, provides a well-established geological framework for studying lacustrine carbonate using U-Pb LA-ICPMS method. The study demonstrates the accuracy and potential of this method in determining the timing of sedimentation in lacustrine systems.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Caue R. Cioffi, Vinicius T. Meira, Ricardo I. F. Trindade, Pierre Lanari, Carlos E. Ganade, Axel Gerdes
Summary: This study investigates the intracontinental deformation in the Borborema Province of Northeast Brazil, finding through thermodynamic modeling and petrochronology that the deformation lasted until at least 530-525 Ma and was influenced by high geothermal gradient conditions.
PRECAMBRIAN RESEARCH
(2021)
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
Geosciences, Multidisciplinary
David Cruset, Jaume Verges, Nuno Rodrigues, Jorge Belenguer, Enric Pascual-Cebrian, Ylenia Almar, Irene Perez-Caceres, Chiara Macchiavelli, Anna Trave, Aratz Beranoaguirre, Richard Albert, Axel Gerdes, Gregoire Messager
Summary: The study combines structural analysis of fractures with 22 U-Pb dates measured in fracture-filling carbonate cements from different types of veins and faults, providing insights into the relationships between overpressures caused by hydrocarbon generation and Andean compression as mechanisms for natural fracturing and vein formation. Multiple generations of fibers have been identified, each with distinct characteristics and ages, suggesting different formation mechanisms and periods.
MARINE AND PETROLEUM GEOLOGY
(2021)
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
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
Luca Barale, Carlo Bertok, Anna d'Atri, Fabrizio Plana, Stefano M. Bernasconi, Gyorgy Czuppon, Lazlo Palcsu, Axel Gerdes, Daniel Birgel, Luca Martire
Summary: In the Maritime Alps, the carbonate rocks of the Provencal Domain underwent intense hydrothermal dolomitization, which was the result of large-scale hydrothermal circulation related to deep faults. New carbonate U-Pb dating and geochemical analysis provided insights into the timing and mechanisms of the hydrothermal circulation.
Article
Chemistry, Analytical
Zhi-Min Tang, Xu-Dong Che, Yue-Heng Yang, Fu-Yuan Wu, Ru-Cheng Wang, Jin-Hui Yang, Axel Gerdes, Ze-Ying Zhu, Feng Liu, Chang Zhang
Summary: Columbite-group minerals (CGMs) with high Hf contents are suitable for Lu-Hf isotope analysis, providing insights into their sources in rare-metal deposits. The study evaluated the impact of tantalum on Hf isotope measurements and proposed improved analytical methods for accurate results.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Chemistry, Analytical
David Evans, Axel Gerdes, Douglas Coenen, Horst R. Marschall, Wolfgang Mueller
Summary: The study showcases a precise and accurate method for measuring boron isotopic composition in natural samples, offering valuable information about formation environments and crystallization mechanisms. Building multi-standard calibration lines to correct for interferences facilitates accurate and precise spatially-resolved delta B-11 measurements across a variety of sample matrices.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Environmental Sciences
Charlotte Prud'homme, Giancarlo Scardia, Hubert Vonhof, Damien Guinoiseau, Saida Nigmatova, Jens Fiebig, Axel Gerdes, Renee Janssen, Kathryn E. Fitzsimmons
Summary: Analyzing sediments from Charyn Canyon, Kazakhstan, researchers found that late Cenozoic variation in Central Asian hydroclimate was driven by the interaction between mid-latitude westerlies and the Siberian high-pressure system, potentially leading to terrestrial feedbacks affecting ocean and atmospheric circulation, highlighting the significance of land-water feedbacks for long-term global climate.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Huichuan Liu, Alan R. Hastie, Chiara Maria Petrone
Summary: This study conducted isotope analyses on two ocean island basalt (OIB)-associated enriched mafic intrusions in the Yunnan-Burma region, and found that these rocks may have originated from the subduction recycling of marine sediments and altered oceanic crust.
Article
Geochemistry & Geophysics
L. Notini, M. Scambelluri, A. Tommasi, A. Zanetti, F. Ferri, A. Rodriguez-Vargas, E. Rampone
Summary: This study provides important petrologic information on the mantle wedge above an active subduction zone in Southern Colombia. The researchers analyzed a unique suite of rock samples and found evidence of hydration, metasomatism, and partial melting in the mantle wedge. They also observed variations in lithotypes, textures, and mineral abundance, indicating different interactions with melts and fluids. This study sheds light on the complex petrological processes occurring in the mantle wedge and contributes to our understanding of subduction zone dynamics.
Article
Geochemistry & Geophysics
Sourav Bhattacharjee, Aniket Chakrabarty, Roger H. Mitchell, Suresh Chandra Patel, Evgeniy N. Kozlov, Ekaterina N. Fomina, Monojit Dey, Supratim Pal
Summary: The Hogenakkal complex in India consists of silicate-rich and silicate-poor carbonatites and clinopyroxenites. The formation of carbonatite is influenced by silicate minerals. The carbohydrothermal mineralization in the carbonatites is induced by magma-derived fluids and interactions with the surrounding rocks.
Article
Geochemistry & Geophysics
Jia-Min Wang, Kyle Patrick Larson, Jin-Jiang Zhang, Liang Zhao, Fu-Yuan Wu
Summary: The role of collisional belts in the global carbon budget is controversial. This study reveals a previously unrecognized carbon source in the collisional orogen of the Himalayas, where metamorphism of carbonate-bearing rocks in the hanging wall resulted in significant CO2 degassing.
Article
Geochemistry & Geophysics
Joseph Martial Akame, Elson Paiva Oliveira, Vinciane Debaille, Marc Poujol, Bernhard Schulz, Dieudonnee Bisso, Fabien Humbert, Serge Parfait Koah Na Lebogo, Philmont Zo'o Zame
Summary: Archean granitoids play key roles in the crustal evolution and can provide important insights into early geologic processes.
Article
Geochemistry & Geophysics
Xiguang Huang, Jun He, Jingxin Zhao, Jingzhao Dou, Weiyong Li, Aimin Hu, Ge Liu, Yiru Ji, Fukun Chen, Shuangqing Li
Summary: This study investigates the zircon ages and whole-rock geochemical data of Late Paleozoic magmatic rocks in the Western Yunnan Tethyan belt to identify the origin and mechanism of mantle melting. The results suggest that these magmatic rocks may originate from different mantle domains that were metasomatized by slab-derived fluids and sediment-derived melts.