Article
Geochemistry & Geophysics
Marshall C. Palmer, James M. Scott, Steven A. F. Smith, Petrus J. le Roux, Chris Harris, Marianne Negrini, Matthew S. Tarling
Summary: By analyzing the Sr isotope data from metasomatic rocks in the Dun Mountain Ophiolite, we have determined the timing of mantle and crust juxtaposition, providing evidence for the closure of a fore-arc ocean basin during the middle Jurassic.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Peng Yang, Qiang-tai Huang, Kai-Jun Zhang, Argyrios Kapsiotis, Hao Zheng, Tou-Ping Peng, Renjie Zhou, Qing-Kun Yang, Wen-xing Luo, Bin Xia
Summary: This paper reports the coexistence of large-scale mid-ocean ridge basalt (MORB)-like and enormous ocean island basalt (OIB)-type rocks in the Dongco ophiolitic rocks of the Bangong-Nujiang Suture Zone. The MORB-like rocks have tholeiitic geochemical characteristics and are derived from a depleted mantle source, while the OIB-type rocks have alkaline characteristics and are derived from an enriched mantle source representing remnants of a Meso-Tethyan oceanic plateau.
Article
Multidisciplinary Sciences
Kristof Porkolab, Thibault Duretz, Philippe Yamato, Antoine Auzemery, Ernst Willingshofer
Summary: This study combines data from ophiolite belts worldwide with thermo-mechanical simulations to demonstrate the causal link between the extrusion of subducted continental crust and the emplacement of far-travelled ophiolites. The results show that the extrusion of subducted continental crust triggers necking and breaking of the oceanic upper plate, leading to the far-travelled ophiolite sheet emplacement.
NATURE COMMUNICATIONS
(2021)
Article
Geosciences, Multidisciplinary
Yan-Jun Wang, Wen-Jun Hu, Hong Zhong, Wei-Guang Zhu, Zhong-Jie Bai
Summary: This study investigates the PGE and Re-Os isotopes of mantle peridotites in the Jinshajiang ophiolite, shedding light on the evolution of the lithospheric mantle beneath the region. Peridotites in the area show features of moderate partial melting and distinctive rock characteristics. Furthermore, the study reveals a melt-rock reaction event in the peridotites after mantle melting, as evidenced by the negative correlations between Pd concentrations and Al2O3 concentrations.
GEOSCIENCE FRONTIERS
(2021)
Article
Geochemistry & Geophysics
Yun-Chuan Zeng, Ji-Feng Xu, Jian-Lin Chen, Bao-Di Wang, Feng Huang, Xiao-Ping Xia, Ming-Jian Li
Summary: This study presents new geochronological and geochemical data, confirming the presence of Early Cretaceous ophiolite within the Bangong-Nujiang Suture Zone and supporting a new model for the evolution of the Meso-Tethys Ocean.
Article
Geosciences, Multidisciplinary
Bin Wang, Chao-Ming Xie, Chris Yakymchuk, Yong-sheng Dong, Yu-hang Song, Meng-long Duan
Summary: Through petrography, whole-rock geochemistry, and U-Pb zircon geochronology, we divided the ultramafic-mafic rocks in the Tangjia-Sumdo greenstone belt into four groups based on their geochemical characteristics: depleted and tholeiitic mafic rocks, transitional mafic rocks, enriched and alkaline mafic rocks, and picritic ultramafic rocks. The crystallization ages of these rocks range from -272 Ma to -250 Ma. We propose that the depleted and tholeiitic mafic rocks represent normal oceanic crust, while the other three groups are fragments of an oceanic plateau formed by mid-late Permian mantle plume activity in the Sumdo Paleo-Tethys Ocean. We further suggest that the majority of the Tangjia-Sumdo greenstone belt represents a middle-late Permian oceanic plateau.
GEOSCIENCE FRONTIERS
(2023)
Article
Geosciences, Multidisciplinary
Marion Grosjean, Robert Moritz, Herve Rezeau, Samvel Hovakimyan, Alexey Ulianov, Massimo Chiaradia, Rafael Melkonyan
Summary: The South Armenian Block (SAB) in the Lesser Caucasus has been studied to reconstruct the Cenozoic magmatic and geodynamic evolution of the Turkish-Lesser Caucasian-Iranian magmatic belt. The magmatic rocks in SAB are dominantly K-rich with a juvenile mantle dominated composition. The study reveals a mantle anomaly underneath SAB, and suggests that the formation of K-rich magmatic rocks in SAB is related to the compressive to tranpressive tectonic regime during Arabia-Eurasia collision.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Wei-Qi Zhang, Chuan-Zhou Liu, Ross N. Mitchell, Tong Liu, Chang Zhang, Zhen-Yu Zhang
Summary: The study of the Pengco ophiolite in central Tibet reveals unique hafnium-neodymium isotopic compositions in the lowermost oceanic crust, indicating greater isotopic variability compared to erupted magmas. This provides important insights into the heterogeneity and melting dynamics of the upper mantle.
Article
Geosciences, Multidisciplinary
Muhammad Qasim, Jalil Ahmad, Lin Ding, Javed Iqbal Tanoli, Maryam Sattar, Qasim Ur Rehman, Muhammad Awais, Muhammad Umar, Upendra Baral, Hawas Khan
Summary: This study investigates the provenance and tectonics of a clastic sequence at the Mesozoic-Cenozoic boundary in the Lesser Himalaya, Pakistan. The findings suggest that the sediments mainly originated from the Indian Plate, with potential contributions from Panjal mafic rocks and ophiolites in the region. The study also indicates regional compression during the Late Cretaceous, with evidence of folding in the underlying Mesozoic sequence before the Palaeocene deposition.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Tushar Mouli Chakraborti, Kosuke Kimura, Arijit Ray, Gautam Kumar Deb, Ramananda Chakrabarti
Summary: The discovery of dismembered cumulate and layered mafic-ultramafic rocks within a mobile belt assemblage in the Singhbhum Craton region of India is enigmatic and may have far-reaching implications for geology. The geochemical composition and isotopic characteristics of the gabbroid and serpentinized wehrlite rocks suggest complex fluid-rock interactions and formation in a magma chamber or oceanic environment. The presence of these oceanic crustal fragments in the Chaibasa intra-continental rift basin indicates rift-drift transition and possible obduction events during the Paleoproterozoic era.
PRECAMBRIAN RESEARCH
(2021)
Article
Geochemistry & Geophysics
Peng Wang, Guochun Zhao, Qian Liu, Yigui Han, Yunying Zhang, Jinlong Yao, Shan Yu
Summary: The study of the Kudi back-arc ophiolite reveals a progressive evolution in back-arc basins, with the formation of enriched pillow lavas due to the addition of slab-derived sediments. The geochemical characteristics of basalts and the pressure conditions support the back-arc setting, suggesting a complex evolution process leading to the enrichment of light rare earth elements in late-stage lavas.
Article
Geochemistry & Geophysics
Tong Liu, Fu-Yuan Wu, Chuan-Zhou Liu, Di-Cheng Zhu, Yin-Zheng Lin
Summary: The asthenosphere beneath ancient and modern oceans is heterogeneous due to the recycling of old mantle domains and subducted oceanic crust and sediments. The mantle peridotites from the Kop Mountain ophiolite in the Neo-Tethys underwent ancient melt extraction and Jurassic melt metasomatism, representing recycled ancient sub-oceanic mantle domains. The Os isotopic distribution of Neo-Tethyan ophiolites is similar to global abyssal peridotites, indicating a highly heterogeneous asthenosphere with various mantle inputs.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geosciences, Multidisciplinary
Yuzhen Fu, Zhimin Peng, Guozhi Wang, Jingfeng Hu, Zhang Zhang, Junlei Guan, Fei Ren
Summary: The Changning-Menglian suture zone (CMSZ) is a newly discovered HP-UHP metamorphic zone in the southeastern Tibetan Plateau. The eclogites found in this area provide key evidence for the main suture of the Proto- and Paleo-Tethys Ocean in western Yunnan. Through a comprehensive study of the Bangbing eclogites, including whole-rock compositions, isotopic and age analyses, and trace element studies, the researchers were able to reveal the subduction and collision processes that occurred in this area.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Xianfeng Zha, Yunpeng Dong, Xiaofeng Gao, Wenhua Ji, Xiaoming Liu, Dengfeng He, Ping Li, Haidi Zhang, Chen Yang
Summary: This paper presents new data on the elemental and isotopic composition of basalts and the ages of zircons from the Subashi ophiolite in the West Kunlun Orogenic Belt (W-KOB). The results suggest that the Subashi ophiolite originated from a depleted spinel lherzolite mantle source in a mid-ocean ridge setting. The ages of the zircons indicate the existence of the Proto-Tethys ocean basin during the Early Paleozoic.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Qiang Liu, Feng Liu, Hualiang Li, Keqing Zong
Summary: The study reveals that some mafic intrusions in the southern ophiolitic belt of Tibet represent remnants of middle Triassic oceanic lithosphere in the Indus-Tsangpo suture zone. This finding contrasts with the previous belief that the Neo-Tethys Ocean opened along the northern edge of Gondwana during the late Triassic-early Jurassic.
Article
Geosciences, Multidisciplinary
Y. Rolland, M. Hassig, D. Bosch, O. Bruguier, R. Melis, G. Galoyan, G. Topuz, L. Sahakyan, A. Avagyan, M. Sosson
GEOSCIENCE FRONTIERS
(2020)
Article
Geochemistry & Geophysics
Simone Costa, Paolo Fulignati, Anna Gioncada, Marco Pistolesi, Delphine Bosch, Olivier Bruguier
Summary: The mineralization potential of arc magmas is influenced by the timing of sulfide melt saturation and exsolution of a magmatic fluid phase. Analysis of eruptive products from the active arc volcano, La Fossa, reveals that metals reach highest abundances in intermediate magmas due to sulfide saturation. The mechanisms governing metal evolution in porphyry Cu systems can be tracked using eruptive products as snapshots of magmatic evolution.
Article
Geology
Nick Mortimer, Delphine Bosch, Christine Laporte-Magoni, Erin Todd, James B. Gill
Summary: The study presents new isotope data for Early Miocene seamount lavas and suggests they formed in an intra-oceanic back-arc basin setting. The lavas are broadly contemporaneous with nearby arc and back-arc basin lavas, highlighting the need for further research to fully understand their tectonic implications.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Yevgeniya Korniyenko-Sheremet, Marc Sosson, Anna Murovskaya, Valentina Gobarenko, Tamara Yegorova
Summary: This paper presents a chronology of tectonic events in the Crimean Mountains and suggests a qualitative model for the formation of the Black Sea Basin and its inversion in the context of the Black Sea-Greater Caucasus. Structural analysis reveals the influence of pre-existing structures on the development of the Crimean Mountains, while paleo-stress analysis allows for the identification of trends and timing of tectonic deformations with greater precision.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Archaeology
Lua Valenzuela-Suau, Silvia Valenzuela-Lamas, Damia Ramis, Delphine Bosch
Summary: The study on the Sr-87/Sr-86 ratios from sheep and goat tooth enamel in the Middle and Late Bronze Age society of the Balearic Islands reveals a correlation between animal mobility and site functionality, as well as the impact of strontium isotopic ratios in different geological layers on determining animal origins.
ENVIRONMENTAL ARCHAEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Francesco Narduzzi, Delphine Bosch, Pascal Philippot
Summary: The study examines the hypothesis that the emergence of continental landmasses and increased subaerial igneous province weathering triggered the Great Oxidation Event. The Nd-isotope data confirm the influence of crustal and hydrothermal components during this period, suggesting a significant role in the rise of atmospheric oxygen and the onset of glaciations.
PRECAMBRIAN RESEARCH
(2021)
Article
Geography, Physical
Luc Bastian, Carlo Mologni, Nathalie Vigier, Germain Bayon, Henry Lamb, Delphine Bosch, Marie-Emmanuelle Kerros, Christophe Colin, Marie Revel
Summary: Research findings indicate that clay-size sediment in the Nile delta mainly originates from the Ethiopian Highlands over the last 110,000 years, influenced by orbital precession cycles. Fluctuations in clay contribution are tied to orbital cycles, with a threshold effect observed during periods of lowest insolation. The study also suggests a gradual influence of temperature decrease on weathering proxies between 110kyr and 20kyr.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Elisa Ferrari, Riccardo Tribuzio, Delphine Bosch, Olivier Bruguier
Summary: This study utilized the U-Pb rutile thermochronometer to investigate amphibolites along the Ivrea crustal section and found Permian and Upper Triassic ages in relict rutiles, potentially linked to two distinct heating events. The first event is associated with Lower Permian post-Variscan extension, while the second event is likely related to the onset of the rifting process in the Upper Triassic leading to crustal breakup in the Middle Jurassic.
Article
Geochemistry & Geophysics
Delphine Bosch, Fabienne Zami, Melody Philippon, Jean-Frederic Lebrun, Philippe Munch, Jean-Jacques Cornee, Lucie Legendre, Alexandre Lemoyne
Summary: This study presents geochemical data from St. Barthelemy Island, showing its similarities with the active branch of the Lesser Antilles arc. The island also shares similarities with St. Martin Island in terms of geodynamic evolution.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geochemistry & Geophysics
Safa Ferhaoui, Rabah Kechiched, Olivier Bruguier, Rosa Sinisi, Laszlo Kocsis, Giovanni Mongelli, Delphine Bosch, Ouafi Ameur-Zaimeche, Rabah Laouar
Summary: Algerian sedimentary phosphorites are relatively enriched in rare earth elements and yttrium (REY). This study investigates the variation of REY contents and other geochemical features with respect to particle size fractions. The results show that the distribution of REY is mainly controlled by the depositional environment, regardless of grain size in the rock.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Geology
Marie C. Genge, Massimiliano Zattin, Cesar Witt, Alexis Derycke, Cecile Gautheron, Stefano Mazzoli, Maurizio Petrelli, Nathan Cogne, Delphine Bosch, Olivier Bruguier, Marcelo Marquez
Summary: The evolution of central Patagonia is influenced by episodic shortening and extension, leading to significant changes in the topography. The San Jorge Basin, as a foreland sedimentary site, is surrounded by volcanic rocks and broken relief. This study uses different dating methods to identify distinctive sediment sources in central Patagonia during the Cenozoic era, providing insights into the variation of sediment sourcing controlled by tectonic processes.
SEDIMENTARY GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Abderraouf Seffari, Nachida Abdallah, Olivier Bruguier, Delphine Bosch, Abdehafid Afalfiz, AbdelKrim Yelles-Chaouche, Abdelmalek Lekoui, Aziouz Ouabadi
Summary: The Yaddene complex in northeastern Algeria is composed of mafic and ultramafic rocks. Petrographic observations indicate depletion of rare earth elements and high Cr content, suggesting depletion and partial melting of the mantle source. The presence of element anomalies suggests interaction between fluids or siliceous melts from subducting oceanic slab. Dating analysis shows that the complex formed around 18.97 Ma and 19.05 Ma.
JOURNAL OF AFRICAN EARTH SCIENCES
(2023)
Article
Archaeology
Sonja Kroll, Julio Bendezu-Sarmiento, Johanna Lhuillier, Elise Luneau, Kai Kaniuth, Mike Teufer, Samariddin Mustafakulov, Mutalib Khasanov, Natalia Vinogradova, Nona Avanesovaj, Denis Fiorillo, Margareta Tengberg, Arash Sharifi, Celine Bon, Delphine Bosch, Marjan Mashkour
Summary: This paper presents a regional study on the mobility of Bronze Age societies in southern Central Asia based on isotopic analyses. The results show different patterns of mobility in three geographical zones, with high immigration and permanent residence in Ulug Depe during the early periods, frequent movements within a limited area in Dzharkutan, and active mobility within a wide area of southern Central Asia in other sites.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2022)
Article
Archaeology
S. Valenzuela-Lamas, M. Diaz-Zorita Bonilla, S. Albizuri, L. D. Pena, D. Bosch, M. E. Subira, F. J. Lopez-Cachero
Summary: The study conducted on equid teeth from Bronze and Early Iron Age Can Roqueta using multi-isotopic analysis suggests that these animals originated from diverse locations and had well-managed diets. The enriched oxygen and carbon isotopic ratios in equid teeth compared to other taxa at the same site indicate that they may have consumed water from troughs, leading to isotopic enrichment similar to that of a lake effect. This is the most comprehensive study on equid mobility in Iberia to date.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2023)
Article
Archaeology
Sergio Jim'nez-Manchn, Silvia Valenzuela-Lamas, Florent Rivals, Ariadna Nieto-Espinet, Delphine Bosch, Nicolas Patris, Armelle Gardeisen
Summary: The Iron Age societies in the Languedoc region underwent progressive transformations that affected their economic, social, and political structure. However, the relationship between animal husbandry and the overall context remains unclear. This study combines various methods to investigate animal diet and mobility, providing new insights into local breeding, animal pasture, and different animal management practices in the Iron Age Languedoc.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2023)
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.