Article
Geosciences, Multidisciplinary
Michael Broecker, Volker Schenk, Erik. E. Scherer, Joko Soesilo, Jasper Berndt
Summary: The Bantimala Complex in central Indonesia is a significant occurrence of Cretaceous metamorphic rocks. It consists of eclogite and blueschist-bearing sequence as part of an accretionary wedge with a complex internal structure. Zircon U-Pb dating reveals a wide age range for the HP/LT rock suite, indicating multiple episodes of high-pressure/low-temperature metamorphism. Detrital zircon U-Pb data suggest that tectonic stacking of the Bantimala Complex occurred after erosion of exposed Cretaceous basement.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Lorraine Tual, Matthijs A. Smit, Jamie Cutts, Ellen Kooijman, Melanie Kielman-Schmitt, Jaroslaw Majka, Ian Foulds
Summary: Explore the timing and rate of subduction-zone metamorphism and H2O release by studying the compositional changes of garnet in blueschists and eclogites. A new protocol using low-loss micro-sampling by laser cutting combined with Lu-Hf chronology is developed. The study reveals extremely fast, pulsed garnet growth and near-instantaneous fluid release reactions in subduction zones.
Article
Geosciences, Multidisciplinary
Mesut Aygul, Aral Okay, Bradley R. Hacker, Andrew R. C. Kylander-Clark
Summary: In situ laser probing of minerals in lawsonite-bearing eclogites and a metabasite provides insights into the redistribution and mobility of REEs controlled by metamorphic reactions. The study reveals significant HREE depletion in garnets due to the nucleation of lawsonite, and enrichment of MREE caused by the breakdown of lawsonite in epidote-bearing eclogites. These findings suggest that the behavior of REEs are influenced by different factors in warm and cold subduction zones.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Alanielson Ferreira, Gary Stevens, Elton L. Dantas, Reinhardt A. Fuck, Ticiano J. S. dos Santos, Marcel V. S. Leandro
Summary: Eclogites provide important evidence for understanding the geological processes during high-pressure to ultra-high-pressure metamorphism. The different groups of retrogressed eclogites studied in this article have distinct origins and mineral compositions, highlighting the complex geological history of the deep crust.
Article
Geology
Federico Rossetti, William Cavazza, Gianfranco Di Vincenzo, Federico Lucci, Thomas Theye
Summary: The study investigates the response of continental crust to regional shortening at convergent plate margins using the Alpine orogenic edifice of Corsica. It challenges the traditional geological description of Corsica and proposes a new tectonic reconstruction, suggesting that most of Hercynian Corsica was thermally reset in post-Eocene times. The study reveals that crustal shortening in the continental basement predated subduction zone metamorphism in the oceanic-derived Schistes Lustres Complex, providing insights into the tectonic history of the region.
JOURNAL OF METAMORPHIC GEOLOGY
(2023)
Article
Geology
Kathrin Fassmer, Nikolaus Froitzheim, Marian Janak, Merle Strohmeyer, Michal Bukala, Markus Lagos, Carsten Muenker
Summary: The collision of Baltica and Laurentia during the Caledonian Orogeny around 400-420 Ma is recorded in the Seve Nappe Complex in Sweden. Eclogites found in the Vaimok and Tsakkok lenses represent rocks from the Baltican continental margin and former oceanic basalts associated with calcschists, possibly representing the ocean-continent transition between Baltica and Iapetus. The ages of eclogites from the Vaimok and Tsakkok lenses were determined to be around 480-488 Ma, suggesting different tectonic events in the Seve Nappe Complex in Jamtland and Norrbotten.
JOURNAL OF METAMORPHIC GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Chi Cao, Hao Cheng
Summary: Understanding the timing and duration of mineral growth is crucial for studying metamorphic belts. Garnet Lu-Hf geochronology is a powerful tool in this regard. Radiometric dating showed that small garnet grains nucleated and grew later than larger crystals, with the Lu-Hf dates serving as a record of the total growth time span.
Article
Geochemistry & Geophysics
Alexander Simpson, Sarah Gilbert, Renee Tamblyn, Martin Hand, Carl Spandler, Jack Gillespie, Angus Nixon, Stijn Glorie
Summary: Lu-Hf geochronology is a powerful method for constraining the temporal evolution of geological systems, with traditional methods requiring time-consuming chemical separations and potentially losing the textural context of analysed minerals. In contrast, the in-situ approach offers rapid analysis with high spatial resolution, but is hindered by isobaric interferences of Yb-176 and Lu-176 on Hf-176.
Article
Geosciences, Multidisciplinary
Xianbin Lu, Bin Xia, Qin Yang, Yuanbao Wu
Summary: Lawsonite formation and preservation during continental subduction and exhumation were explored through the analysis of HP-LT eclogite samples from Gaoqiao in western Dabie. The presence of lawsonite in subduction zones is significant for understanding fluid activity, element migration, and crust-mantle interactions.
FRONTIERS IN EARTH SCIENCE
(2023)
Review
Geosciences, Multidisciplinary
Alexander Simpson, Stijn Glorie, Martin Hand, Carl Spandler, Sarah Gilbert
Summary: Recent advances in laser ablation reaction-cell mass spectrometry enable rapid and efficient Lu-Hf age dating of minerals. This study applies the novel LA-ICP-Q-MS/MS method to analyze garnets from the 'Moine Supergroup' Scotland and reveals terrane scale geochronological information in polymetamorphic rocks. The laser ablation Lu-Hf dating accurately determines the timing of different metamorphic events within single garnets and provides insight into micron-scale processes such as Lu diffusion and garnet recrystallization.
Article
Geochemistry & Geophysics
S. Jung, J. A. Pfander, K. Mezger, E. Hellebrand, S. Brandt
Summary: Determining the ages and duration of high-grade metamorphic episodes and melt extraction events through studies of multichronometric garnet data in the Pan-African Damara belt of Namibia provides crucial insights into the chemical and petrological evolution of the Earth's continental crust over time.
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
Geology
Gong TingNan, Du JinXue, Zhang LiFei, Shen XiaoJie
Summary: The blueschist-eclogite belt in Chinese southwestern Tianshan is a rare occurrence of ultrahigh pressure metamorphic rocks derived from subducted oceanic crust. Isotope geochronology studies indicate that the metamorphism occurred in the Carboniferous. This study provides precise constraints on the age of peak metamorphism using Lu-Hf isotope geochronology, revealing that the UHP metamorphism occurred at around 326.9Ma and the HP metamorphism occurred at around 306Ma in Chinese southwestern Tianshan. The age of 326.9 +/- 1.3Ma for UHP metamorphism is significant in understanding the timing of deep subduction and closure of South Tianshan paleo-ocean.
ACTA PETROLOGICA SINICA
(2023)
Article
Geosciences, Multidisciplinary
Shreya Mukherjee, Avishek Adhikari, Gautier Nicoli, Ravikant Vadlamani
Summary: The study on the Eastern Dharwar craton reveals that isotopic dating of garnet and phase equilibria modeling can help refine the orogenic models in the region, providing further insights into the sequential growth history of cratons.
PRECAMBRIAN RESEARCH
(2022)
Article
Geology
Sebastian Weber, Matthias Hauke, Raul E. Martinez, Charlotte Redler, Carsten Muenker, Nikolaus Froitzheim
Summary: In the Western Alps, the transformation of mafic granulites into glaucophane eclogites and eclogite veins in shear zones within Monte Emilius indicates limited eclogitization controlled by chemical redistribution. Thermodynamic modeling suggests Ca-rich fluid infiltration and transformation to a depth of approximately 60-70 km, with eclogitization occurring in the Early Eocene at 52.96 +/- 0.91 Ma.
JOURNAL OF METAMORPHIC GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Sophie Decree, Daniel Herwartz, Julien Mercadier, Ismael Mijan, Vivian de Buffrenil, Thierry Leduc, Olivier Lambert
Article
Geochemistry & Geophysics
Fernando Gazquez, Mario Morellon, Thomas Bauska, Daniel Herwartz, Jakub Surma, Ana Moreno, Michael Staubwasser, Bias Valero-Garces, Antonio Delgado-Huertas, David A. Hodell
EARTH AND PLANETARY SCIENCE LETTERS
(2018)
Article
Geosciences, Multidisciplinary
A. Vitale Brovarone, P. Agard, P. Monie, A. Chauvet, A. Rabaute
EARTH-SCIENCE REVIEWS
(2018)
Article
Geosciences, Multidisciplinary
G. Molli, A. Vitale Brovarone, O. Beyssac, I. Cinquini
JOURNAL OF STRUCTURAL GEOLOGY
(2018)
Article
Multidisciplinary Sciences
J. Surma, S. Assonov, D. Herwartz, C. Voigt, M. Staubwasser
SCIENTIFIC REPORTS
(2018)
Article
Geochemistry & Geophysics
Shawn E. McGlynn, Jennifer B. Glass, Kristin Johnson-Finn, Frieder Klein, Sebastian A. Sanden, Matthew O. Schrenk, Yuichiro Ueno, Alberto Vitale-Brovarone
AMERICAN MINERALOGIST
(2020)
Article
Geochemistry & Geophysics
Alberto Vitale Brovarone, Christopher J. Butch, Alessandra Ciappa, Henderson J. Cleaves, Agnes Elmaleh, Manuele Faccenda, Maureen Feineman, Joerg Hermann, Fabrizio Nestola, Angelina Cordone, Donato Giovannelli
AMERICAN MINERALOGIST
(2020)
Article
Geochemistry & Geophysics
Celine Martin, Kennet E. Flores, Alberto Vitale-Brovarone, Samuel Angiboust, George E. Harlow
Article
Multidisciplinary Sciences
A. Vitale Brovarone, D. A. Sverjensky, F. Piccoli, F. Ressico, D. Giovannelli, I Daniel
NATURE COMMUNICATIONS
(2020)
Article
Multidisciplinary Sciences
Francesco Giuntoli, Alberto Vitale Brovarone, Luca Menegon
SCIENTIFIC REPORTS
(2020)
Article
Biochemical Research Methods
Swea Klipsch, Daniel Herwartz, Michael Staubwasser
Summary: The study modified the extraction, purification, and pyrolysis mass spectrometry methods for sulfate in soil samples to improve sample processing efficiency. The precision and accuracy of pyrolysis using quartz cups were comparable to those using gold capsules, demonstrating the accuracy and precision of the simplified method.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2021)
Article
Multidisciplinary Sciences
Daniel Herwartz, Andreas Pack, Thorsten J. Nagel
Summary: Research suggests that high CO2 sequestration fluxes into the oceanic crust lowered the oxygen isotope ratios of seawater on early Earth, leading to the formation of ancient chemical sediments. These results support the hypothesis of a high pCO2 greenhouse atmosphere during the Archean eon.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geology
Ivano Gennaro, John Weber, Alberto Vitale Brovarone, Jeanette Arkle, Xu Chu
Summary: The Northern Range of Trinidad is composed of Mesozoic passive margin sedimentary rocks that underwent ductile deformation and sub-greenschist- to greenschist-facies metamorphism in the early Miocene. An abrupt increase in the peak metamorphic temperatures across the range suggests the presence of a range-cutting fault (Chupara Fault). The revised tectonic models should account for deeper burial and greater exhumation.
JOURNAL OF METAMORPHIC GEOLOGY
(2023)
Article
Multidisciplinary Sciences
M. Tatzel, P. J. Frings, M. Oelze, D. Herwartz, N. K. Luensdorf, M. Wiedenbeck
Summary: The O-18/O-16 ratio of cherts increases over time, and two explanations have been proposed: cooling seawater temperature and increasing seawater delta O-18. However, this study shows that cherts are a reliable record of diagenetic temperatures, and the timing and temperature of quartz precipitation are determined by the kinetics of silica diagenesis. Heat flow through the sediment column has decreased over time, accounting for part of the increase in delta O-18(chert), which eliminates the need for extreme seawater temperature or delta O-18(sw) reconstructions.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Claudia Voigt, Daniel Herwartz, Cristina Dorador, Michael Staubwasser
Summary: This study examines the hydrology of the Salar del Huasco in Chile, showing that combining triple oxygen isotope data with classic δH-δO-18 studies can accurately identify different types of evaporation and improve the accuracy of a lake's hydrological balance estimation.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(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.