Article
Multidisciplinary Sciences
Yu Wang, Stephen F. Foley, Stephan Buhres, Jeremie Soldner, Yigang Xu
Summary: Potassium-rich volcanism occurring throughout the Alpine-Himalayan belt from Spain to Tibet is characterized by unusually high Th/La ratios, which may be attributed to a new mantle lithosphere formed only 20 to 50 million years earlier at shallow depths without deep subduction of continental materials. This mechanism is consistent with a temporal trend in Th/La in potassic postcollisional magmas, indicating shallow sources in accretionary settings.
Article
Astronomy & Astrophysics
Fa-Bin Pan, Chong Jin, Xiaobo He, Lu Tao, Bao-Jian Jia
Summary: Cenozoic volcanic rocks in the East Asian continental margin are formed by asthenosphere upwelling and decompression melting, with varying origins attributed to plate tectonics and magma sources. The migratory nature of volcanic activities in response to the retreat and rollback of the Pacific slab is observed, suggesting a connection to intraplate volcanism.
EARTH AND SPACE SCIENCE
(2021)
Article
Geology
Yuangang Yue, Yunpeng Dong, Shengsi Sun, Dengfeng He, Bo Hui, Xiang Ren, Bin Zhang, Weidong He
Summary: The Buqingshan Complex, a part of the Muztagh-Buqingshan-Anemaqen ophiolitic melange zone, contains oceanic rocks that represent remnants of the Paleo-Tethys Ocean. These rocks exhibit characteristics of abyssal peridotites, normal mid-ocean ridge basalts (N-MORB), and oceanic island basalts (OIB). The geological, geochemical, and geochronological data suggest that the Late Palaeozoic N-MORB- and OIB-type rock assemblages are most likely fragments of mid-ocean ridge oceanic lithosphere and seamounts, respectively, representing the evolution stages of the Paleo-Tethys Ocean.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geochemistry & Geophysics
Jing Wang, Ben-Xun Su, Paul T. Robinson, Yan Xiao, Yang Bai, Xia Liu, Patrick Asamoah Sakyi, Jie-Jun Jing, Chen Chen, Zi Liang, Zhi-An Bao
Summary: The study examined the trace elements in olivine and found differences in trace element contents and ratios among different types of mafic-ultramafic rocks, which can be used as chemical proxies to distinguish the origin and evolution processes of the rocks.
Article
Geochemistry & Geophysics
Yan Li, Feng-Jun Nie, Zhao-Bin Yan
Summary: The study focused on the Late Jurassic mafic volcanic rocks from the Badaguan area in northwestern Erguna Block, providing insight into their formation, magma sources, and compositional evolution through detailed petrological, geochemical, and zircon U-Pb dating analysis. The rocks exhibit characteristics consistent with subduction-related igneous rocks and are likely derived from partial melting of metasomatized lithospheric mantle with possible incorporation of subducting sediments. The magmatic evolution included fractional crystallization of Fe and Ti oxides, suggesting lithospheric extension following the closure of the Mongol-Okhotsk Ocean.
Article
Geosciences, Multidisciplinary
Xin Qian, Yuejun Wang, Yuzhi Zhang, Yang Wang, Chengshi Gan, Yukun Wang, Mongkol Udchachon, Vongpaseuth Senebouttalath
Summary: The study of volcanic rocks in northwestern Laos reveals that the rocks have diverse origins, reflecting different geological processes and providing important insights into the geological evolution and regional correlation in Southeast Asia.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Xie Zhipeng, Wu Xuelu, Wang Tengfei, Xue Chuandong, Yang Tiannan, Wang Wei, Sui Binxi, Xin Di
Summary: The Changning-Menglian Belt in the southeastern Tibetan Plateau is a major Paleo-Tethyan Suture that separates continental fragments from Gondwana and Eurasia. The volcanic rocks in this belt provide evidence of the tectonic processes during the evolution of the Paleo-Tethyan Ocean. New geochemical data for Early Carboniferous volcanics show that these rocks are magmatic cumulates with affinities to ocean island basalt.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2022)
Article
Chemistry, Multidisciplinary
Briana Aguila, Landon Hardee, H. Todd Schaef, Siavash Zare, Mohammad Javad Abdolhosseini Qomi, Jarrod V. Crum, Jade E. E. Holliman Jr, Elena Tajuelo Rodriguez, Lawrence M. Anovitz, Kevin M. Rosso, Quin R. S. Miller
Summary: The ongoing use of fossil fuels has led to the need for research on carbon dioxide emissions and climate change. Mineral trapping of carbon in basalt and related rocks shows promise, but the mineralization rates depend on the composition of the rocks. Diopside, a common mineral in basalt, has been studied for its carbon mineralization kinetics using supercritical CO2 mixed with water. The experiments revealed the transformation of diopside into various carbonates and provided insights into the dissolution-precipitation process. The findings suggest that diopside has high potential for carbon mineralization and can aid the design of carbon storage operations.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Geology
Xiaohui Jia, Jun Wu, Gongjian Tang
Summary: This study presents new zircon U-Pb age and Hf isotope data, as well as whole-rock geochemical and Sr-Nd isotopic data for migmatites and potassic mafic rocks in southern Guangdong, South China. The results suggest that the migmatites were formed from partial melting of metasedimentary rocks, while the potassic rocks were generated from an enriched mantle source modified by ancient oceanic subducted sediments. The tectonic transition from syn-orogenic compression to post-orogenic extension likely occurred in the Late Ordovician (ca. 451-446 Ma) for the early Palaeozoic orogen in South China.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Microscopy
Vasileios Giamas, Petros Koutsovitis, Alkiviadis Sideridis, Pascal Turberg, Tassos A. Grammatikopoulos, Petros Petrounias, Panagiota P. Giannakopoulou, Nikolaos Koukouzas, Konstantin Hatzipanagiotou
Summary: X-ray micro-computed tomography (mu CT) was used to study ophiolitic rock samples from various locations in the Vardar ophiolite outcrops in North Greece. The combination of mu CT results and mineral chemical analyses allows for accurate calculation and visualization of mineral composition, crystal structure, and distribution in a 3D perspective. This information is critical for investigating ophiolitic rocks and understanding their petrogenesis, deformation-related fabrics, and for applied research purposes.
Article
Geochemistry & Geophysics
C. Manikyamba, M. Santosh, K. S. Subramanyam, G. Harshitha Reddy, Jyotisankar Ray, Asima Kar, Arijit Pahari
Summary: The Simlipal complex in the Singhbhum Craton is an enigmatic geological formation that consists of a variety of rock types, including mafic volcanic rocks, quartzites, komatiites, and ultramafic rocks. These rocks exhibit different chemical compositions and element patterns, suggesting that they were formed in different geodynamic settings during the Neoarchean time. The complex is believed to have been formed in forearc and back-arc environments, and later juxtaposed with plume-derived volcanic sequences and passive margin sediments as the arc evolved towards the continent.
Article
Geochemistry & Geophysics
Jin-Sheng Zhou, Cheng-Cheng Huang, Qiang Wang, Zhong-Yuan Ren, Lin Ma, Lu-Lu Hao, Le Zhang
Summary: Constraints on mantle heterogeneity are crucial for understanding geochemical differentiation and recycling in the Earth's interior. This study provides insights into the mantle source of continental potassic alkali basalts through high-precision analyses of olivine phenocrysts and melt inclusions. The results suggest that the primary magmas were derived from a phlogopite-bearing pyroxenite source with peridotite residues, and the recycling of continental crustal material played a role in enriching the mantle source.
JOURNAL OF PETROLOGY
(2022)
Article
Multidisciplinary Sciences
Thitiphan Assawincharoenkij, Chakkaphan Sutthirat, Piyaphong Chenrai, Suwapak Imsamut, Punya Charusiri
Summary: The study found that Sa Kaeo and Pattani suture mainly consist of different types of rocks, including serpentinite, gabbro, diabase, and basalt. These rocks are believed to originate from a back-arc basin and have undergone ancient subduction processes.
Article
Geochemistry & Geophysics
Thomas Grocolas, Pierre Bouilhol, Guillaume Caro, Stephen J. Mojzsis
Summary: The study of the ca. 3.75 Ga Ukaliq supracrustal enclave in northern Quebec sheds light on the nature of crustal formation during the Eoarchean, providing insights into the composition, metamorphic characteristics, and magmatic evolution of rocks at that time, offering important clues for understanding geological changes during that period.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
David A. Holwell, Daryl E. Blanks
Summary: Magmatic Ni-Cu-PGE sulfide mineralisation is commonly found in tholeiitic to komatiitic mafic-ultramafic intrusions, but has been increasingly discovered in alkaline-ultramafic, post-collisional magmatic systems. The Mordor Alkaline Igneous Complex in Australia shares similarities with other alkaline-hosted occurrences in terms of mineralisation characteristics.
MINERALIUM DEPOSITA
(2021)