Article
Geochemistry & Geophysics
Qi Chen, Li-Qun Dai, Zi-Fu Zhao, Yong-Fei Zheng
Summary: The study of early Paleozoic mafic intrusives in the Heishishan area reveals their origin from mantel sources affected by metasomatism, the effects of magma differentiation and recharge on their composition variation were also identified through zircon U-Pb dating and whole-rock/mineral geochemical analysis.
Article
Geochemistry & Geophysics
Qi Chen, Li-Qun Dai, Zi-Fu Zhao, Yong-Fei Zheng, Yao Zhou
Summary: This study investigates mafic intrusives in the Qilian orogen to understand the nature of crust-mantle interaction. The results suggest that the studied mafic igneous rocks originated from a heterogeneous orogenic lithospheric mantle source, resulting from the incorporation of variable crustal materials into the mantle. Model calculations confirm that the heterogeneous mantle source can be generated by the reaction of mantle wedge peridotite with different proportions of subducting oceanic crust-derived solutions and sediment-derived melts. In addition to crust-mantle interaction during oceanic subduction, magmatic processes such as magma recharge and mixing may also contribute to the petrogenesis of arc igneous rocks above the subduction zone.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Dong Fu, Bo Huang, Simon A. Wilde, Tim E. Johnson, Ali Polat, Brian F. Windley, Zhaochu Hu, Zhipeng Zhou, Timothy M. Kusky
Summary: The study reveals that the North Qilian back-arc basin in the northeastern region of the North Qilian orogenic belt underwent an early spreading phase and subsequent closure through two subduction episodes. The findings highlight the crucial role of back-arc oceanic crust subduction in the closure of back-arc basins, and the complex evolutionary tempo of such basins in Earth history.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
S. Shawn Wei, Philipp Ruprecht, Sydney L. Gable, Ellyn G. Huggins, Natalia Ruppert, Lei Gao, Haijiang Zhang
Summary: The Alaska Peninsula section of the Aleutian-Alaska subduction zone exhibits significant differences in plate coupling, seismic activity, and arc magmatism along its strike direction, with more fluids found in the southwestern region and more sediments subducted in the northeastern region. This suggests that the slab is more hydrated and undergoing more intensive dehydration in the southwest, while more sediments are subducted in the northeast.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Jia-Wei Xiong, Yi-Xiang Chen, Ji Shen, Claudio Marchesi, Marco Scambelluri, Li-Ping Qin, Vicente Lopez Sanchez-Vizcaino, Jose Alberto Padron-Navarta, Manuel D. Menzel, Carlos J. Garrido
Summary: Fluids released through serpentinite dehydration can contain high Cl- content, promoting the mobility of Cr in subduction zones. This study provides high-precision Cr isotope data for a suite of serpentinites from different depths in oceanic subduction zones, revealing variable Cr isotope fractionation during serpentinite dehydration. The findings suggest that Cl-bearing fluids at different dehydration stages play a role in the Cr isotope heterogeneity of mantle wedge peridotites and arc magmas.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Zi-Xuan Wang, Ren-Xu Chen, Yong-Fei Zheng, Qiong-Xia Xia, Zhi-Min Wang, Zhuang-Zhuang Yin, Zhaochu Hu
Summary: A combined study of garnet and zircon in metabasites from North Qaidam revealed different episodes of metamorphic processes with varying pressure, temperature, and time paths. Garnet and zircon from different growth stages exhibit distinct trace elements, isotopes, and involved minerals, indicating a complex metamorphic history involving eclogite- and granulite-facies conditions in the region.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
A. Schaarschmidt, K. M. Haase, P. C. Voudouris, V Melfos, R. Klemd
Summary: Compiled data shows the age progression and migration of arc magmatic activity from Oligocene to present along two linear profiles in the South Aegean Volcanic Arc. The geochemical data along the profiles reveal the variable contribution of sediments to the arc magmas, with different compositions reflecting different subduction rates and sediment types. The ascent of mixed material from the subducted slab into the mantle wedge is suggested to be focused and controlled by the subduction of large volumes of sediments.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Carlos R. Corella Santa Cruz, Georg F. Zellmer, Claudine H. Stirling, Susanne M. Straub, Marco Brenna, Malcolm R. Reid, Karoly Nemeth, David Barr
Summary: The dominant volcanism in the Taupo Volcanic Zone (TVZ) is rhyolitic magma, which was previously believed to be generated through assimilation and fractional crystallization of wall rocks. However, this petrogenetic model fails to accurately reproduce the chemical characteristics of the samples. Instead, it is proposed that the dominant magma source in the TVZ is a subduction me ' lange interacting with the sub-arc mantle.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Jiao-Long Zhao, Xin Zhang, Jin-Rong Wang, Qing-Yan Tang, Wen-Na Zhou, Xiao-Xiao Ma
Summary: The translated article introduces the Late Ordovician-Early Devonian Lumanshan gabbro-granite association in the Qilian Block, providing important geological clues for understanding crust-mantle interactions, regional tectonics, and geodynamic processes.
Article
Geochemistry & Geophysics
Yang Yu, Xiao-Long Huang, Yu-Ming Lai, Jie Li, Yi-Gang Xu, Sun-Lin Chung, Iwan Setiawan, Fan Yang
Summary: This study investigates the relationship between oxygen fugacity and B-Mo isotopic fractionation processes during subduction by studying the geochemical data of continental arc basalts (CABs) and back-arc basalts (BABs) from Sumatra. The results show that there is a correlation between oxygen fugacity and B-Mo isotopic fractionation in subduction zones. The isotopic compositions of Sr-Nd-Hf-Pb in CABs and BABs vary, indicating the input of different amounts of melt from subducted sediments into mantle sources. The BAB samples exhibit significant B isotopic fractionation during melting of subducted sediments, while the Mo isotopic fractionation is limited.
Article
Geosciences, Multidisciplinary
Zhengshuai Zhang, Jianchang Zheng, Shuhao Wang, Cuiqin Li, Fangbin Liu
Summary: In this paper, the authors collected seismic phase arrival data of 14,033 local natural earthquakes and determined 3-D P and S wave velocity structures beneath the Japan Islands. They found strong lateral heterogeneities in the forearc region and imaged the subducting Pacific slab as a high-velocity (high-V) anomaly. Low-velocity (low-V) zones were observed in the mantle wedge beneath the volcanic front. The results highlight the role of fluids in arc magmatism and plate melting in the mantle wedge behind the Japan Trench.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Yan Hu, Fang-Zhen Teng, Catherine Chauvel
Summary: This study used stable potassium isotopes to track the crustal signatures in lavas from Martinique Island in the Lesser Antilles arc. The results show that the variations in K isotopes in these lavas are related to chemical parameters and radiogenic isotope ratios, indicating modification of mantle sources by input of subducted sediments. Most lavas have <1% to 5% of subducted sediments added to their mantle sources, with some samples showing divergence likely caused by the addition of K-bearing fluids from slab dehydration.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geology
Yuxiao Chen, Ying Cui, Shuguang Song, Shanming Fu, Lipeng Zhang, Weidong Sun, Tangfu Xiao
Summary: The late Cambrian tonalite-trondhjemite association in the eastern segment of North Qilian suture zone provides important insights into the sub-arc magmatic process and tectonic evolution, with evidence suggesting that these rocks were likely formed in a continental-arc rifting environment. The geochemical characteristics of these rocks indicate minimal contribution from the continental crust, with a common basaltic parental magma undergoing crystal fractionation in the early stage of subduction due to slab rollback.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geochemistry & Geophysics
Li-Tao Ma, Li-Qun Dai, Zi-Fu Zhao, Fang Huang, Bing Gong
Summary: We conducted an integrated study on mafic arc igneous rocks in Southwestern Tianshan, China to distinguish slab aqueous solutions from sediment melts in generating arc magmatism. The DKR and NZS rocks are enriched in fluid-mobile elements, while the SXY rocks are enriched in melt-mobile elements. Quantitative model calculations and analysis of geochemical characteristics further confirmed these findings.
Article
Geochemistry & Geophysics
Dejan Milidragovic, James A. Nott, Dylan W. Spence, Dirk Schumann, James S. Scoates, Graham T. Nixon, Richard A. Stern
Summary: The isotopic composition of sulfur in different types of sulfides from the Polaris Alaskan-type intrusive rocks was analyzed using in-situ microanalytical techniques. The sulfides showed variation in isotopic composition, with chalcopyrite having near-chondritic values, pyrrhotite and secondary pyrite displaying subchondritic values, and pyrite from country rocks having elevated values. This suggests that wall-rock assimilation played a minor role and sulfur in the Polaris magmas is primarily of magmatic origin, with some contribution from subducted sulfate.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geology
Yuxiao Chen, Ying Cui, Shuguang Song, Shanming Fu, Lipeng Zhang, Weidong Sun, Tangfu Xiao
Summary: The late Cambrian tonalite-trondhjemite association in the eastern segment of North Qilian suture zone provides important insights into the sub-arc magmatic process and tectonic evolution, with evidence suggesting that these rocks were likely formed in a continental-arc rifting environment. The geochemical characteristics of these rocks indicate minimal contribution from the continental crust, with a common basaltic parental magma undergoing crystal fractionation in the early stage of subduction due to slab rollback.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geology
Yanguang Li, Shuguang Song, Xiaoyong Yang, Zi-Fu Zhao, Jinlong Dong, Xiaofeng Gao, Michael T. D. Wingate, Chao Wang, Meng Li, Mengqi Jin
Summary: Through the research in the Altyn Tagh terranes in northwest China, it is found that the Yapuqiasayi mafic dykes in the North Altyn Tagh have similar age and petrogenetic characteristics to mafic igneous rocks in Australia, South China, Seychelles, Laurentia, and Tarim, indicating a possible relationship with the breakup of the Rodinia supercontinent.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Hengzhe Bi, D. L. Whitney, Shuguang Song, Xin Zhou
Summary: The Early Paleozoic eclogite belt in the East Kunlun Orogen provides valuable insights into the subduction history of the Proto-Tethys Ocean. By studying the P-T conditions and time-scales of the eclogites, we can better understand the process of subduction and collision in this tectonic system.
Article
Geosciences, Multidisciplinary
Li Su, Shuguang Song, Chao Wang, Mark B. Allen, Hongyu Zhang
Summary: This study investigates volcanic rocks in southwestern China and finds that they have petrological and geochemical characteristics consistent with a mantle plume origin. The mantle plume activity started around 335 million years ago, earlier than the breakup of the Gondwana continent and the opening of the Neo-Tethys Ocean.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Jie Dong, Chunjing Wei, Shuguang Song
Summary: The North Qinling Orogen in central China is a typical high-pressure and ultra-high pressure metamorphic belt. By studying samples from this area, four stages of metamorphic evolution have been identified: the high-pressure amphibolite facies stage, the peak ultra-high pressure eclogite facies stage, the decompression stage, and the cooling stage. Additionally, three metamorphic ages have been determined through zircon and monazite U-Pb dating. The findings are significant for understanding the geological evolution of the North Qinling Orogen.
Article
Geochemistry & Geophysics
Shuo Chen, Pu Sun, Yaoling Niu, Pengyuan Guo, Tim Elliott, Remco C. Hin
Summary: The study reveals significant variations in molybdenum isotopes in mid-ocean ridge basalts, indicating mantle compositional heterogeneity. The variations in Mo isotope compositions are best explained by two-component mixing between incompatible element depleted and enriched endmembers. The findings suggest that recycled oceanic mantle lithosphere metasomatized by low degree melt plays a key role in the formation of source lithologies in the East Pacific Rise.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Yaoling Niu
Summary: This article summarizes the author's 30-year research on the basalt problem, highlighting the importance of lithosphere thickness control instead of mantle potential temperature control in determining the extent and pressure of mantle melting and basalt compositions. The author encourages debate and discussion within the scientific community regarding this paradigm shift.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geology
Yuanyuan Xiao, Shengying Wu, Peishan Sui, Yaoling Niu, Weidong Sun, Guodong Wang, Juanjuan Kong, Fengli Shao, Xiaohong Wang, Hongmei Gong, Meng Duan, Zihang Huang
Summary: The Chinese Loess Plateau is the largest loess deposit on Earth. It has been found that most elements in the loess samples are significantly correlated with La or Al2O3, indicating their presence in particle minerals during weathering, transport, and deposition.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geology
Tao Wen, Jinlong Dong, Chao Wang, Shuguang Song
Summary: The ophiolites in the East Kunlun region provide valuable insights into the evolution of the Proto-Tethys to the Paleo-Tethys. There are two ophiolite belts in this region, each with distinct rock characteristics and different formation histories. Through geochronological and geochemical comparisons, the long-term evolution of the East Kunlun Orogenic Belt can be understood.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Pengyuan Guo, Yaoling Niu, Shuo Chen, Meng Duan, Pu Sun, Yanhong Chen, Hongmei Gong, Xiaohong Wang
Summary: This study supports a recent hypothesis that heavy Fe isotope enrichment in mid-ocean ridge basalts (MORB) results from a process of incompatible element enrichment. The researchers conducted an Fe isotope study of well-characterized MORB samples from a specific segment of the Mid-Atlantic Ridge and found that the Fe isotope composition of the oceanic upper mantle is heterogeneous and correlates with the abundances and ratios of incompatible elements and Sr-Nd-Hf isotopes. They propose that low-degree melt metasomatism at the lithosphere-asthenosphere boundary beneath ocean basins is responsible for the heavy Fe isotope enrichment observed in MORB. This process is predicted to be globally common and widespread.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Lu Xiong, Shuguang Song, Li Su, Guibin Zhang, Mark B. Allen, Di Feng, Shuwen Yang
Summary: The Qilian Orogen in the northern Tibetan plateau provides insights into the tectonic history of the Proto-Tethys Ocean. Through geochronological and Hf isotopic studies, this research reveals the timing of the opening and closure of the Proto-Tethys Ocean, as well as the subduction polarity, based on the statistical ages and crustal similarities. The findings contribute to our understanding of the tectonic processes and crustal growth in the Qilian Orogen.
Article
Geosciences, Multidisciplinary
Guibin Zhang, Lei Han, Lifei Zhang, Shuguang Song, Shuaiqi Liu
Summary: This study collected ultrahigh-pressure eclogites with coesite inclusions from the northern Dulan terrane in the North Qaidam orogen. Through zircon U-Pb dating and pressure-temperature calculations, it was found that these eclogites represent a continuous record from oceanic subduction to continental collision.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Chao Wang, Shuguang Song, Guochun Zhao, Mark B. Allen, Li Su, Tianyu Gao, Tao Wen, Di Feng
Summary: This study investigates the calc-alkaline plutons and their mafic magmatic enclaves in a Proto-Tethyan intra-oceanic arc using field investigation, petrology, geochronology, and geochemistry. The results show that these plutons were derived from subduction-metasomatized arc mantle and underwent multi-stage fractional crystallization to generate different composition. These calc-alkaline plutons are crucial for understanding the formation and evolution of continental crust.
JOURNAL OF PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Wasiq Lutfi, Lawangin Sheikh, Zhidan Zhao, Shuguang Song, Tehseen Zafar, Yasin Rahim, Dong Liu, Di-Cheng Zhu, Zhenzhen Wang, Laeiq Ahmad, Khalid Latif
Summary: The Kohistan Island Arc is an obducted oceanic arc on top of the Indian Plate that formed in the equatorial region of the Tethys Ocean during the Mesozoic to Cenozoic eras. The Chilas Complex contains various types of rocks and represents exhumed lower arc crustal sections. This study focuses on the source and chemical modification of the Chilas gabbronorite, revealing its similarity to continental lower crust and contamination by continental crust materials.
Article
Geosciences, Multidisciplinary
Di Feng, Chao Wang, Shuguang Song, Lu Xiong, Guibin Zhang, Mark B. Allen, Jie Dong, Tao Wen, Li Su
Summary: This study analyzed rock samples from the East Kunlun Orogen and revealed two discontinuous orogenic cycles from the Proto-Tethys to the Paleo-Tethys. The findings show two major mountain-building stages occurring at approximately 550-370 Ma and 290-200 Ma.
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.