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
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
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
Yiran Wang, Jianghong Deng, Renqiang Liao, Long Chen, Dongyong Li, He Liu, Weidong Sun
Summary: The serpentinized mantle wedge undergoes magnesium isotopic fractionation during late-stage serpentinization, resulting in slightly heavier magnesium isotopic compositions. This is likely due to the removal of isotopically light magnesium by infiltrating slab fluids. Mantle wedge peridotites have magnesium isotopic compositions that are similar to subcontinental lithospheric mantle peridotites and lighter than oceanic mantle peridotites, suggesting mantle heterogeneity.
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
Geochemistry & Geophysics
Renqiang Liao, Hongli Zhu, Congying Li, He Liu, Weidong Sun
Summary: The iron isotope heterogeneity of subduction-related primitive magmas is primarily caused by mantle melting processes. Additionally, the varied iron isotope compositions in subduction settings may reflect their heterogeneous sources, which may be related to plate subduction.
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
Geosciences, Multidisciplinary
Jeffrey H. Tepper, Matthew W. Loewen, Liam M. Caulfield, Peter C. Davidson, Kaitlin L. Ruthenberg, Samuel W. F. Blakely, Duncan F. J. F. Knudsen, Devin F. Black, Bruce K. Nelson, Yemane Asmerom
Summary: Plutonic rocks in northeastern Washington, USA, provide evidence of crustal thickening and subsequent collapse and extension over a 60 m.y. period. The rocks emplaced during different periods reflect orogenic plateau development, followed by collapse and rollback of the Farallon slab. The magmas formed under drier conditions and from a greater depth in the Eocene period compared to earlier periods. The tectonic model is supported by seismic tomography, which has identified remnants of a detached slab beneath the region.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
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
Jingchuan Wang, Yu Jeffrey Gu
Summary: The morphology and composition of subducted slabs in the upper mantle transition zone have direct implications for mantle convection. Investigating the seismic reflectivity structure beneath South America, researchers found broad regions with depressed discontinuities and diminished precursor amplitudes beneath the back-arc region of Nazca subduction. Probabilistic inversion and amplitude-versus-offset inversion techniques were used to determine mantle temperature and composition, showing a mechanically mixed transition zone with basalt enrichment beneath the Amazon basin. This study provides direct evidence for thermochemical anomalies in the mantle and their interactions with subducting slabs.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
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
Geochemistry & Geophysics
He Liu, Yiran Wang, Jianghong Deng, Yu Zhang, Qian Chen, Renqiang Liao, Wei-dong Sun
Summary: Research shows that modern-style subduction and corresponding arc magmatism started globally around 2.2 billion years ago, coinciding with the onset of the supercontinent cycle. Continuous subduction of cold oceanic lithosphere not only leads to arc magmatism along active margins, but also accelerates the cooling rate of the mantle, reducing the widespread distribution of intermediate-felsic rocks derived from crustal delamination and slab melting.
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
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
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
Geochemistry & Geophysics
Yanhong Chen, Yaoling Niu, Qiqi Xue, Yajie Gao, Paterno Castillo
Summary: The geology and magmatism of the northern Mariana Trough (NMT) represent a type example for the development of a back-arc basin. Studies have shown systematic variations in Fe isotopes and element compositions of basalts from south to north, revealing source variations and contributions of slab materials and mantle characteristics. This tectonic-magma evolution is manifested through the geochemistry and petrology of the NMTB samples, highlighting the importance of lithospheric characteristics in subduction initiation.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
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
Geosciences, Multidisciplinary
Xin Dong, Zeming Zhang, Zuolin Tian, Yaoling Niu, Liangliang Zhang
Summary: The high-pressure eclogites in the central Himalaya provide insights into the metamorphism and exhumation history of crustal material beneath the Tibetan plateau. Through the analysis of zircon and titanite U-Pb ages, bulk-rock and mineral compositions, and zircon Hf isotope data, the study reveals the evolution of these eclogites, from peak HP eclogite-facies metamorphism to later retrograde metamorphism. The findings suggest a long-lived burial and slow exhumation process of the Indian continental crust since the initial Indo-Asia collision at around 55 Ma.
Article
Geochemistry & Geophysics
Pu Sun, Yaoling Niu, Pengyuan Guo, Meng Duan, Xiaohong Wang, Hongmei Gong
Summary: This study investigates the impact of high-pressure crystallization and immiscible sulfide melt segregation on the compositional variation of basaltic magmas. The findings suggest a co-precipitation of clinopyroxene megacrysts with garnet and immiscible sulfide and silicate melts. The study highlights the importance of considering these processes when determining the primary compositions of basalts and understanding magma eruption.
JOURNAL OF PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Shuo Chen, Yaoling Niu, Xiaohong Wang, Qiqi Xue, Wenli Sun
Summary: The study confirms that MMEs and their host granodiorites share the same parental magmas and exhibit clear cumulate signatures, highlighting the need for a re-examination of the petrogenesis of intermediate magmatic rocks and models of continental crustal growth.
JOURNAL OF PETROLOGY
(2021)
Article
Geochemistry & Geophysics
Hangshan Lei, Zhidan Zhao, Yaoling Niu, Shuangquan Zhang, Brian Cousens, Qian Ma, Fang-Zhen Teng, Dong Liu, Zhuang Miao, Yiyun Yang, Jingkai Wu, Qing Wang, Di-Cheng Zhu
Summary: Miocene basalts in the Maguan area of the Tibetan Plateau exhibit magma characteristics similar to oceanic basalts, suggesting an asthenospheric mantle origin. This indicates that mantle metasomatism in the region may be associated with Neo-Tethys seafloor subduction.
Article
Geochemistry & Geophysics
Xin Tong, Jingjing Yan, Zhidan Zhao, Yaoling Niu, Ningyuan Qi, Qingshang Shi, Dong Liu, Qing Wang, Liang-Liang Zhang, Guochen Dong, Di-Cheng Zhu
Summary: This study focuses on mid-late Jurassic granitoids in the Lhasa region, suggesting they are primarily crust-derived with influence from basaltic melts derived from metasomatized mantle. This process was likely driven by southward subduction of the Bangong-Nujiang Ocean lithosphere, resulting in the generation of granitoid magmas.
Article
Geochemistry & Geophysics
Meng Duan, Yaoling Niu, Pu Sun, Shuo Chen, Juanjuan Kong, Jiyong Li, Yu Zhang, Yan Hu, Fengli Shao
Summary: The calculation of magma temperatures using Zircon saturation thermometry can be misleading and lacks geological significance in natural rock samples. The reliance on bulk-rock Zr content for calculating magma temperatures may not accurately reflect the true temperature of the granitic melt.
MINERALOGY AND PETROLOGY
(2022)
Article
Multidisciplinary Sciences
Yaoling Niu
CHINESE SCIENCE BULLETIN-CHINESE
(2022)
Article
Geochemistry & Geophysics
Shuo Chen, Yaoling Niu, Hongmei Gong, Xiaohong Wang, Qiqi Xue
Summary: This study reassesses the effect of magma differentiation on Mo isotope fractionation, finding that fractional crystallization of amphibole, biotite, and Fe3+-rich minerals does not fractionate Mo isotopes in these granitoids based on data analysis from two plutons.
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
Geochemistry & Geophysics
Shuguang Song, Shiting Ye, Mark B. Allen, Yaoling Niu, Weidong Sun, Lifei Zhang
Summary: Plate subduction can change the redox state of the Earth's mantle, and analysis shows that progressive metamorphism is a reduction reaction process. The oxygen released from this reduction reaction is sufficient to raise the oxygen fugacity in the mantle wedge and arc magmas.
AMERICAN MINERALOGIST
(2022)
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
Environmental Sciences
Yanhong Chen, Yaoling Niu, Meng Duan, Hongmei Gong, Pengyuan Guo
Summary: Chemical analyses of rock samples from the Atlantis Bank in the Indian Ocean show that fractional crystallization during the evolution of mid-ocean ridge basalts can explain the difference in iron isotopic compositions between mid-ocean ridge basalts and abyssal peridotites. The iron isotope contrast increases with fractional crystallization, even when oxides begin to crystallize, indicating a complex isotopic evolution process.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.
