Article
Geology
M. F. Ringwood, J. J. Schwartz, R. E. Turnbull, A. J. Tulloch
Summary: In the Zealandia Cordillera, episodic magmatism during the Phanerozoic was dominated by two high magma-addition-rate (MAR) events spaced approximately 250 million years apart. These two high-MAR events had distinct chemistries and are unlikely to have been related by a cyclical process. The magmatic events were triggered by dynamic changes in the subducting slab.
Article
Geology
Pin Gao, M. Santosh, Toshiaki Tsunogae, Cheng-Xue Yang, M. Nakagawa, Sung Won Kim, Yunpeng Dong, Hai-Dong Liu
Summary: In this study, a suite of felsic volcanic rocks and lamprophyres from central Shikoku Island in SW Japan arc were investigated. The felsic volcanic rocks show characteristics of arc volcanic affinity and can be correlated to Miocene magmatism. The lamprophyres, on the other hand, display OIB-like geochemical features and were derived from depleted mantle sources contaminated by crustal materials.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Manuel Francisco Pereira, Jose Manuel Fuenlabrada, Carmen Rodriguez, Antonio Castro
Summary: Carboniferous magmatism in southwestern Iberia played a crucial role in understanding the formation of the Pangea supercontinent and recorded the complex oblique convergence between Laurussia and Gondwana. A new tectonic model suggests that the Iberia Variscan belt was the site of simultaneous collisional and accretionary orogenic processes.
Article
Geology
Jing-Yi Wang, M. Santosh, Toshiaki Tsunogae, Sung Won Kim, Yun-Peng Dong
Summary: Subduction zones act as gateways for large-scale material and energy exchange. In the SW Japan region, ongoing convergent margin processes with island arc magmatism are important to understand. This study investigates bimodal magmatic suites in the Tsukuba area of Japan, revealing Hbl-gabbros and granitoids with distinct characteristics. The petrological and geochemical features of these rocks suggest a connection between Cretaceous arc magmatism in Tsukuba and the magmatic belt in SW Japan.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Jiyu Du, Nan Tao, Bin Jiang, Yan Wang, Weimin Song, Cheng Qian, Xiaoping Yang, Yujin Zhang, Shiwei Chang
Summary: The newly recognized Late Carboniferous volcanic rocks in Ongniud Banner have ages younger than previously thought, enriched in light rare earth elements and large-ion lithophile elements, with contributions from mantle materials suggesting a subduction-related continental margin arc setting.
GEOLOGICAL JOURNAL
(2021)
Article
Geochemistry & Geophysics
Alex Burton-Johnson, Joaquin Bastias, Stefan Kraus
Summary: The geometry and evolution of the Antarctic-Phoenix Plate system is studied using new Ar-Ar dating and geochronology, revealing the cessation of arc magmatism at around 19 million years ago and the migration of the arc front and rear. The narrowing of the arc and the cessation of magmatism are primarily attributed to the subduction of younger oceanic crust and decreasing convergence rate. Similar changes in geometry and composition are observed on the Andean arc, suggesting a potential correlation between slab age, convergence rate, and magmatic arc geometry and composition.
Article
Geosciences, Multidisciplinary
Teal R. Riley, Alex Burton-Johnson, Michael J. Flowerdew, Fernando Poblete, Paula Castillo, Francisco Herve, Philip T. Leat, Ian L. Millar, Joaquin Bastias, Martin J. Whitehouse
Summary: The Antarctic Peninsula has preserved evidence of a long-lived continental margin with various geological units, suggesting a convergent margin setting from the Cambrian to the Cenozoic. Through the use of geochronology and field evidence, along with detailed kinematic reconstructions, the relationships between geological units and tectonic events in Patagonia and the proto-Antarctic Peninsula have been established. The Gondwana/Pangea continental margin experienced crustal block translation, deformation, magmatic pulses, and development of thick accretionary complexes, which were influenced by subducting slab dynamics.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geology
Zhang Wang, Wang JuLi, Hu Yang
Summary: The Sailekente pluton in the Xiemisitai area consists of monzonitic granite, quartz diorite, and granodiorite formed in the Early and Late Devonian. The pluton is characterized by high silica and alkali enrichment, with fractionation of LREE and HREE. The magmatism is associated with subduction from the Late Ordovician to the Late Devonian.
ACTA PETROLOGICA SINICA
(2021)
Article
Geochemistry & Geophysics
Hanchao Jian, Juan Pablo Canales, K. W. Helen Lau, Mladen R. Nedimovic
Summary: This study used seismic profiling and inversion techniques to investigate the crustal and upper mantle structure offshore northeastern Nova Scotia, revealing the importance of magmatism in the processes of rift development and seafloor spreading. The results show that even at magma-poor margins, magmatism plays a significant role in the lithospheric breakup and onset of oceanic spreading.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Jun-Hong Zhao, Oliver Nebel, Tim E. Johnson
Summary: The study of rocks from two regions in South China reveals that they may have originated from different crustal materials and experienced varying degrees of contamination, with their isotopic evolution potentially linked to spatial and temporal variations in deep crustal source rocks.
JOURNAL OF PETROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Shuo Wang, Yunhua Liu, Benzhao Yang, Le Tan, Xiaoyan LI, Nan Deng
Summary: The Xiejiaba and Fuqiangbei plutons are part of the Neoproterozoic Niushan complex in the southern South Qinling belt. They provide insights into Neoproterozoic tectonism within the South Qinling belt, with similar composition and emplacement at 750-711 Ma. The magmas that formed these plutons were derived from the crust-mantle boundary, indicating a period of late subduction and backarc extension in the region, which constrains the timing of subduction within the South Qinling belt and the northern Yangtze Block to 750-711 Ma.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2023)
Article
Geosciences, Multidisciplinary
Pierig Deiller, Pavla Stipska, Marc Ulrich, Karel Schulmann, Stephen Collett, Vit Peresty, Bradley Hacker, Andrew Kylander-Clark, Hubert Whitechurch, Ondrej Lexa, Eric Pelt, Jitka Mikova
Summary: The study examined previously unrecognized mafic and felsic plutonic rocks, as well as a possible upper-crustal equivalent, in the Bohemian Massif. The rocks exhibited evidence of active margin magmatism and Mid-Devonian magmatism, with a three-stage geodynamic model proposed to explain their formation. The magmatic rocks recorded a Mid-Devonian magmatic arc related to the subduction wedge beneath the upper plate.
Review
Geosciences, Multidisciplinary
Yener Eyuboglu, Francis O. Dudas, Di-Cheng Zhu, M. Santosh, Ze Liu, Nilanjan Chatterjee, Keewook Yi
Summary: The research on the Eastern Pontides Orogenic Belt in northeastern Turkey reveals a complex continental arc system with multi-stage Late Cretaceous magmatism showing different characteristics in terms of rock types and geochemical features, indicating a significant geological differentiation.
Article
Geochemistry & Geophysics
G. Jones, L. Ootes, Y. Luo, A. Vezinet, R. Stern, D. Milidragovic, D. G. Pearson
Summary: New igneous zircon Hf-O data from the Hogem batholith provide insights into the magmatic history and source inputs of the Quesnel arc. The data suggest that mantle-derived magmas were the main contributors to the Hogem batholith, with minor input from young recycled oceanic crust. Contrary to previous models, the study indicates that ancestral North American crust did not play a role in the construction of the Quesnellia region.
Article
Geochemistry & Geophysics
Othmar Muntener, Peter Ulmer, Jonathan D. Blundy
Summary: Magmatic rocks in the Alps are scarce and the activity pre-dates the Eurasia-Adria collision. The geochemical data for magmatic rocks in the Alps resemble subduction-related magmatic arcs. The occurrence of different types of magmas is likely related to the absence of vigorous mantle wedge convection.