Article
Geochemistry & Geophysics
Junhua Yao, Wei-Guang Zhu, Chusi Li, Zhong-Jie Bai, Yan-Jun Wang, Lei-Luo Xu
Summary: This study investigates the controls on the chemistry of Neoproterozoic arc magmas using zircon trace elements and Hf-O isotopes, as well as whole-rock chemical and Sr-Nd isotope compositions. The results show that both reduced and oxidized magmas can be produced simultaneously in a subduction zone.
Article
Geochemistry & Geophysics
M. Satish-Kumar, T. Kurihara, R. Shishido, T. Yoshida, T. Takahashi, R. Nohara-Imanaka
Summary: The Renge Belt in the Omi serpentinite me acute accent lange of proto-Japan contains meta-gabbros, eclogites, and mafic schists with distinct geochemical and isotopic characteristics. The meta-gabbros display features suggesting an arc origin, while the eclogites and mafic schists resemble modern oceanic crust in their trace element patterns. The Sr-Nd isotopic compositions vary, indicating different sources for the rocks, potentially related to a magmatic arc in the Cambrian and subsequent tectonic events involving subduction and erosion.
Article
Geosciences, Multidisciplinary
Wanchese M. Saktura, Solomon Buckman, Allen P. Nutman, Jessica Walsh, George Murray
Summary: The Karakoram terrane is a preserved part of peri-Gondwana continental crust in Ladakh, India. It became a part of Eurasia during the Jurassic and its southern margin was an active continental margin represented by the Karakoram Batholith. Geochronological data suggests that the magmatism in the terrane was extinguished during the Late Cretaceous. More studies are needed to understand the geological and tectonic evolution of the southern margin of Eurasia before and after the final continental collision with the Indian continent.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Review
Geosciences, Multidisciplinary
Giuseppe Betino De Toni, Maria de Fatima Bitencourt, Luana Moreira Florisbal, Amos Martini, Lauro Valentim Stoll Nardi
Summary: The evolution of the Dom Feliciano Belt was reviewed based on various geological data. The belt is divided into three sectors and shows different tectonic domains at different stages of collision. The study reveals the geological processes and characteristics of different regions within the belt, as well as comparisons with other terranes.
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
Abdullah Sar, Sevcan Kurum, Ahmet Feyzi Bingol
Summary: This study investigates the magmatic evolution of the Eastern Pontides orogenic belt in northeastern Turkey using new zircon U-Pb ages, Lu-Hf isotopes, and whole-rock geochemical and Sr-Nd isotopic analyses. The results suggest a heterogeneous magma source, possibly derived from a juvenile lower crust. Additionally, the magmatism in the area is associated with the collision of the Anatolide Taurid Platform with the Pontides.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Victor Kovach, Ivan Kozakov, Alfred Kroener, Ekaterina Salnikova, Kuo-Lung Wang, Hao-Yang Lee, Julia Plotkina, Boris Gorokhovsky, Elena Adamskaya, Elena Tolmacheva, Lidiya Shpakovich
Summary: This study presents new geological, geochronological, geochemical, and Nd-Hf isotopic data for the Melange Zone within the Zavkhan terrane in Mongolia and discusses the terrane structure, early Neoproterozoic continental crust growth, and microcontinent formation in the north-central part of the Central Asian Orogenic Belt. The findings imply that the Zavkhan terrane is a composite terrane consisting of different complexes separated by a Melange Zone.
Review
Environmental Sciences
Owen M. Weller, Catherine M. Mottram, Marc R. St-Onge, Charlotte Moller, Rob Strachan, Toby Rivers, Alex Copley
Summary: The similarities and differences between the Himalaya-Tibetan orogen and ancient mountain belts highlight the key factors controlling mountain building. Foreland rheology is considered a critical factor in determining the effectiveness of comparing orogens.
NATURE REVIEWS EARTH & ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Chen-Hao Luo, Rui Wang, Roberto F. Weinberg, Zengqian Hou
Summary: In summary, this study investigates crustal growth in the Gangdese belt and its relationship with porphyry deposit formation, revealing significant variations in isotopic and geochemical characteristics among different arc periods. The Miocene magmatic rocks exhibit distinct features with higher Mg# and more evolved isotopic compositions compared to preceding arcs. This suggests the involvement of different sources in the formation of Miocene magmas, with hybridization playing a key role in crustal growth and porphyry deposit formation in the collisional orogen.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geochemistry & Geophysics
Yang Liu, Jinggui Sun, Jilong Han, Liang Ren, Alei Gu, Keqiang Zhao, Yangyang Feng, Xiaolei Chu
Summary: The Early Cretaceous volcanic suite in the Dongan region is characterized by arc magma affinity and enrichment in large ion lithophile elements and light rare earth elements. The sequential emplacement of ore-related andesitic and granitic melts is attributed to the magmatic processes in a continental extensional setting. The metal-rich bubbles release at shallower levels to produce epithermal veins due to prolonged differentiation in the active magma chamber.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Geology
Zehua Guo, Zenghui Yu, Ke Wang, Shikui Zhai, Huaijing Zhang
Summary: The Okinawa Trough is a natural laboratory for studying basin evolution, magmatism, and crust-mantle interactions. Magmas in the Middle Okinawa Trough and Southern Okinawa Trough are mainly occurring. To investigate the magmatism in the Okinawa Trough, volcanic rock samples from the MOT and SOT were analysed for Fe - Sr - Nd - Pb - Hf isotopic compositions.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
H. S. Moghadam, Q. L. Li, M. Kirchenbaur, D. Garbe-Schoenberg, F. Lucci, W. L. Griffin, G. Ghorbani
Summary: The study reveals that collisional magmatism in the NE Iran back-arc began around 24 million years ago, with magmatism starting as early as the Late Cretaceous and continuing until the Pleistocene. The collisional igneous rocks exhibit bimodal characteristics, with significant isotopic differences between basaltic-andesitic and dacitic-rhyolitic components, suggesting a role of fractional crystallization and assimilation-fractional crystallization in the genesis of felsic rocks. Trace element and isotopic modeling point to triggers of magmatism in NE Iran being a depleted to enriched mantle and the Cadomian continental crust of Iran, with temporal magmatic variations observed from Late Cretaceous to Pleistocene.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geology
Xiaolei Chu, Jinggui Sun, Yong Zhang, Yang Liu, Zhikai Xu, Jilong Han, Chuntao Zhao, Yanpeng Liu, Kezhang Qin
Summary: The Ermi porphyry Cu deposit is a medium-sized copper deposit located on the northeastern margin of the North China Craton. The copper mineralization mainly occurs within intrusions of various rock types and is thought to have formed in an active continental margin environment related to plate rollback during the Cretaceous period.
ORE GEOLOGY REVIEWS
(2021)
Article
Geochemistry & Geophysics
Guilherme Loriato Potratz, Mauro Cesar Geraldes, Maria Virginia Alves Martins, Bruna Saar de Almeida
Summary: This study presents new insights into the characteristics and origin of the Sana Granite in the Ribeira Belt in Brazil, revealing its difference from previously classified Nova Friburgo suite rocks. The results suggest that the Sana Granite is an S-type granite formed during the postcollisional stage of the Ribeira Belt, mainly composed of partially melted metasedimentary rocks.
Article
Geology
Yalei Wang, Shengchao Xue, Xiaoman Wang, Zhaowei Zhang, Luyang Wang, Yu Xin, Ze Zhang, Yongkang He
Summary: Numerous early Paleozoic mafic-ultramafic intrusions in the Qinghai-Tibet Plateau host important Ni-Cu sulfide mineralization. The Shitoukengde Ni-Cu deposit is one of the most representative magmatic sulfide deposits in the East Kunlun Orogenic Belt. The deposit exhibits disseminated and net-textured sulfide mineralization, with variable sulfur contents and low platinum-group element concentrations.
ORE GEOLOGY REVIEWS
(2023)