Article
Geosciences, Multidisciplinary
Amin Jafari, Habibollah Ghasemi
Summary: This study presents a descriptive model of the Sabzevar Oceanic Basin (SOB) in Northeast Iran, based on detailed geological evidence and reconstruction of its evolutionary geologic history. The evidence suggests that the SOB formed during Late Triassic-Early Jurassic times as a result of extensional movements following the subduction initiation of the Iranian sector of the NeoTethys in the Zagros orogenic belt and closed in the Paleocene after NeoTethyan early continental collision. The magmatic activity in the SOB shows a progressive spatio-temporal evolution with distinct ranges of magma series.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Sarah J. Titus, Joshua R. Davis
Summary: The net tectonic rotation method, originally developed for sedimentary rocks and lavas, was later adapted for dikes. Numerical experiments show that geometric flaws may occur in the method if dikes are not quite vertical prior to deformation, impacting the interpretations based on factors such as dike strike, dip, and paleomagnetic reference direction. Comparative analyses with alternative techniques suggest that consideration of the initial state of dikes is crucial for the application of the net tectonic rotation method.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geology
Wenchao Yu, Giacomo Oggiano, Giovanni Mongelli, Jintao Zhou, Roberto Buccione, Lingtong Xu, Paola Mameli, Yuansheng Du
Summary: Bauxite deposits in Italy are mainly found in the Sardinia and Adria regions within Cretaceous carbonate sequences. The parental affinity of these deposits has long been disputed, with four potential sources proposed. This study analyzed the detrital zircon U-Pb ages and Hf isotope values of Cretaceous bauxites in these regions, along with published geochemical data, to discuss their provenances. The results showed that the bauxite deposits in Sardinia originated from the Variscan metasedimentary basement, while those in Adria were mainly supplied by coeval volcanic materials.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Burak Semih Cabuk, Mualla Cengiz
Summary: The Marmara region in northwestern Turkey is located along the Alpine-Himalayan orogenic belt, consisting of tectonic fragments from different zones. The region has undergone significant deformation history since the Late Cretaceous, with clockwise rotations observed across various zones.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Yufeng Ren, Xuexiang Qi, Cheng Wei, Xufeng Liu, Fengbao Ji
Summary: This paper presents the geological and geochemical data of ophiolitic blocks in the southeast margin of the Gaoligong tectonic belt and discusses their significance in the tectonic evolution of the Meso-Tethys. The ophiolites contain mainly harzburgite peridotites, exhibiting distinct mineral chemistries and occurrences. These peridotites have experienced different geological processes and represent fragments of subcontinental lithospheric mantles.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Kent C. Condie, Robert J. Stern
Summary: Ophiolites are fragments of oceanic lithosphere that provide evidence for plate tectonics. They are recognized in the geologic record by specific rock compositions and structures. The presence of ophiolites before and after 900 Ma suggests the initiation and expansion of subduction zones. The scarcity of ophiolites older than 900 Ma may reflect preservation biases or a slower rate of plate tectonic activity during that time.
GEOSCIENCE FRONTIERS
(2023)
Article
Geosciences, Multidisciplinary
Niels Meijer, Guillaume Dupont-Nivet, Alexis Licht, Pierrick Roperch, Alexander Rohrmann, Aijun Sun, Shengcheng Lu, Amber Woutersen, Norbert Nowaczyk
Summary: The study investigates the tectonic and palaeo-environmental evolution of the Xining Basin, NE Tibet, by analyzing the litho- and magnetostratigraphy of early Eocene sections and using U-Pb radiometric dating. The results suggest highly variable accumulation rates during the early Eocene, supporting an extensional origin of the basin. The study also raises the question of whether the extension was related to the subducting Pacific Plate or the India-Asia collision.
Article
Geology
Ali Mohammadi, Jean-Pierre Burg, Marcel Guillong
Summary: Provenance analysis of sandstone modal compositions, heavy mineral assemblages, and LA-ICP-MS U-Pb dating with in-situ Hf isotopic compositions of detrital zircons in Northwest Iran reveals two distinct Late Cretaceous-Eocene turbiditic sequences, indicating the presence of separate basins with different provenance characteristics. The Siah Cheshmeh-Khoy-Misho-Tabriz Fault is identified as a reworked suture that marks the boundary between two lithospheres separated by ophiolite outcrops, suggesting the erosion and subduction of the Cretaceous arc witnessed in clastic material.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Hossein Azizi, Motohiro Tsuboi
Summary: Magmatic activity in northwestern Iran occurred during three main intervals, with the last phase showing similarities to postcollisional magmatism. The Van microplate and surrounding ocean played a crucial role in the evolution of magmatic activity in the region since the Cretaceous.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Derya Guerer, Roi Granot, Douwe J. J. van Hinsbergen
Summary: Formation of a subduction zone in the Neotethys Ocean triggers a cascade of plate tectonic events. A plate kinematic model reveals that the plume-induced plate motion change leads to the formation of a new subduction zone, which perpetuates through a plate circuit.
Article
Geochemistry & Geophysics
Bassam A. Abuamarah, Fahad Alshehri, Mokhles K. Azer, Paul D. Asimow
Summary: This study reports the first investigation of rodingite in the Ess ophiolite, located in the northeast end of the Yanbu suture of the Arabian Shield. Rodingite occurs as cross-cutting dykes in serpentinite and irregular blocks in ophiolitic mélange, bounded by chloritite blackwall zones. The formation of rodingite is believed to have occurred contemporaneously with serpentinization, and the major episode of rodingitization predates the obduction of the Ess ophiolite onto the Arabian Shield. This study reveals that the protolith gabbro was transformed to rodingite through Ca-metasomatism related to adjacent serpentinized ultramafic rocks.
Article
Multidisciplinary Sciences
Jiannan Meng, Ozan Sinoplu, Zhipeng Zhou, Bulent Tokay, Timothy Kusky, Erdin Bozkurt, Lu Wang
Summary: Earthquakes are a result of planetary tectonic plate movements. The lack of understanding of the link between deep geological processes and upper crustal deformation may lead to future earthquakes and volcanic eruptions, highlighting the importance of studying to better protect infrastructure and cultures in the region.
SCIENTIFIC REPORTS
(2021)
Article
Geochemistry & Geophysics
D. Ninkabou, P. Agard, C. Nielsen, J. Smit, C. Gorini, M. Rodriguez, B. Haq, N. Chamot-Rooke, C. Weidle, C. Ducassou
Summary: The northern Oman margin plays a key role in understanding the emplacement of the Semail Ophiolite and obduction processes. Different regions along the margin show distinct geological histories.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Franz Neubauer, Yongjiang Liu, Yunpeng Dong, Ruihong Chang, Johann Genser, Sihua Yuan
Summary: This study summarizes the evolutionary history of the Austroalpine and Southalpine basement units in the Southern Alps and emphasizes their crucial role in the Alpine-Mediterranean mountain belts. It involves various geological processes like plate collision, ophiolite formation, magmatic activity, and rifting.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Tong Liu, Henry J. B. Dick, Chuan-Zhou Liu, Fu-Yuan Wu, Wen-Bin Ji, Chang Zhang, Wei-Qi Zhang, Zhen-Yu Zhang, Yin-Zheng Lin, Zhen Zhang
Summary: By studying the Xigaze ophiolite in Tibet, researchers have deciphered the origin and significance of sheeted sill complexes and non-sheeted diabase sills, highlighting the important role of detachment faults in their formation. This study suggests that mechanisms such as large block exhumation, multi-stage rotations, and foundering are key factors in the generation of these geological structures. The findings also indicate that the evolution of detachment faults contributes to the complexity of internal structures in (ultra)slow-spreading ridges compared to fast-spreading ridges.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Marco Maffione, Cedric Thieulot, Douwe J. J. van Hinsbergen, Antony Morris, Oliver Plumper, Wim Spakman
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2015)
Article
Geosciences, Multidisciplinary
Antony Morris, Alastair H. F. Robertson, Mark W. Anderson, Emma Hodgson
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2016)
Article
Geosciences, Multidisciplinary
Richard J. Arculus, Osamu Ishizuka, Kara A. Bogus, Michael Gurnis, Rosemary Hickey-Vargas, Mohammed H. Aljahdali, Alexandre N. Bandini-Maeder, Andrew P. Barth, Philipp A. Brandl, Laureen Drab, Rodrigo do Monte Guerra, Morihisa Hamada, Fuqing Jiang, Kyoko Kanayama, Sev Kender, Yuki Kusano, He Li, Lorne C. Loudin, Marco Maffione, Kathleen M. Marsaglia, Anders McCarthy, Sebastien Meffre, Antony Morris, Martin Neuhaus, Ivan P. Savov, Clara Sena, Frank J. Tepley, Cees van der Land, Gene M. Yogodzinski, Zhaohui Zhang
Article
Geochemistry & Geophysics
Jarek Trela, Eric C. Ferre, Patrick Launeau, Daniel M. Bartz, Antony Morris
Article
Geology
Antony Morris, Marco Maffione
Article
Geology
Antony Morris, Matthew Meyer, Mark W. Anderson, Christopher J. MacLeod
Letter
Geosciences, Multidisciplinary
Richard J. Arculus, Osamu Ishizuka, Kara A. Bogus, Michael Gurnis, Rosemary Hickey-Vargas, Mohammed H. Aljahdali, Alexandre N. Bandini-Maeder, Andrew P. Barth, Philipp A. Brandl, Laureen Drab, Rodrigo do Monte Guerra, Morihisa Hamada, Fuqing Jiang, Kyoko Kanayama, Sev Kender, Yuki Kusano, He Li, Lorne C. Loudin, Marco Maffione, Kathleen M. Marsaglia, Anders McCarthy, Sebastien Meffre, Antony Morris, Martin Neuhaus, Ivan P. Savov, Clara Sena, Frank J. Tepley, Cees van der Land, Gene M. Yogodzinski, Zhaohui Zhang
Article
Geochemistry & Geophysics
Masako Tominaga, Maurice A. Tivey, Christopher J. MacLeod, Antony Morris, C. Johan Lissenberg, Donna J. Shillington, Vicki Ferrini
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2016)
Article
Geochemistry & Geophysics
Marco Maffione, Douwe J. J. van Hinsbergen, Giovanni I. N. O. de Gelder, Freek C. van der Goes, Antony Morris
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2017)
Article
Geology
Antony Morris, Matthew Meyer, Mark W. Anderson, Christopher J. MacLeod
Article
Geochemistry & Geophysics
J. A. Bowles, A. Morris, M. A. Tivey, I. Lascu
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2020)
Article
Geochemistry & Geophysics
Anita Di Chiara, Antony Morris, Mark W. Anderson, Luca Menegon, Alain Tremblay
GEOPHYSICAL JOURNAL INTERNATIONAL
(2020)
Article
Geochemistry & Geophysics
Marco Maffione, Antony Morris
Summary: The Philippine Sea Plate in the West Pacific is a unique natural laboratory for studying subduction dynamics and the evolution of upper plate magmatism. Through the International Ocean Discovery Program Expedition 351, researchers obtained cores from Site U1438, providing valuable information on the volcanic events in the region.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geochemistry & Geophysics
Antony Morris, Mark W. Anderson, Ahmed Omer, Marco Maffione, Douwe J. J. van Hinsbergen
EARTH AND PLANETARY SCIENCE LETTERS
(2017)
Article
Geochemistry & Geophysics
Marco Maffione, Antony Morris
EARTH AND PLANETARY SCIENCE LETTERS
(2017)
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)