Article
Geosciences, Multidisciplinary
Jun Zhang, Manoj K. Pandit, Wei Terry Chen, Wei Wang
Summary: The geological record in NW India provides vital information for studying the tectonic evolution and Gondwana transition. The Punagarh and Sindreth basins exhibit characteristics of a back-arc basin setting, while the Marwar Supergroup represents sedimentation in a tectonically stable basin. These findings are in agreement with the subduction of the peripheral Rodinia supercontinent and the Gondwana assembly.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Wei Wang, Peter A. Cawood, Manoj K. Pandit
Summary: The evolution of the Indian Block can be traced through Earth's supercontinent cycles, showing a close link with the events in the Cathaysia Block of South China. Terranes and microcontinents continued to accrete and collide along the western margin of the united North India-Cathaysia Block, leading to the formation of active continental margins and eventual collision with other blocks. The final assembly of Gondwana and Pangea involved the separation and drift of multiple continental blocks, eventually leading to the collision with the Asian segment of Pangea in the Permo-Triassic.
AMERICAN JOURNAL OF SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Hang Li, Chao Wang, Willis Hames, Jiangbo Hao, Joseph G. Meert, Zunpu Yu, Shuai Zhang, Xiaokui Sun, Deqing Ma, Xue Li
Summary: This paper presents zircon U-Pb and biotite-muscovite 40Ar/39Ar isotope data from the Yemananshan Complex in the western Central Qilian belt to assess the age and provenance of late Mesoproterozoic-early Paleozoic successions in the Qilian orogen. The results indicate Late Mesoproterozoic-early Neoproterozoic orogenesis and clastic metasedimentary rocks deposited between 1050 and 920 Ma in the Central Qilian belt.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Er-Kun Xue, Wei Wang, David Chew, Manoj K. Pandit, Xin Deng, Yang Tian, Xi-Run Tong, Jun-Hong Zhao
Summary: The study reveals the presence of water-fluxed melting during the Wuyi-Yunkai Orogeny in South China. These water-fluxed melting quartzo-feldspathic migmatites formed during the early Paleozoic and were melted through reactions involving water-saturated quartz, feldspar, biotite, and K-feldspar. The findings highlight the significance of water-fluxed anatexis in the differentiation of the continental crust during orogenesis.
Article
Geosciences, Multidisciplinary
Zhiliang Zhang, Mansoureh Ghobadi Pour, Leonid E. Popov, Lars E. Holmer, Feiyang Chen, Yanlong Chen, Glenn A. Brock, Zhifei Zhang
Summary: This study in South China reveals the oldest Cambrian brachiopod-trilobite association, providing potential for stratigraphic correlation. The new species Eoobolus incipiens represents one of the earliest linguliform brachiopods.
Article
Geosciences, Multidisciplinary
Bingbing Liu, Touping Peng, Weiming Fan, Guochun Zhao, Jianfeng Gao, Xiaohan Dong, Shili Peng, Limin Wu, Bingxia Peng
Summary: South China and India, along with their derivative blocks, have similar magmatic and sedimentary records that provide insights into the transition from Rodinia to Gondwana. The new results, combined with published data, reveal a continuous link between South China and India from ca. 830 Ma to ca. 510 Ma, forming the South China-India Duo on the western margin of Rodinia. The development of rift systems and common magmatism and sedimentation indicate the geodynamic mechanism behind this transition. South China separated from Indian Gondwana around 510 Ma due to the opening of the Proto-Tethys Ocean.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Geology
Ke Pang, Chengxi Wu, Yunpeng Sun, Qing Ouyang, Xunlai Yuan, Bing Shen, Xianguo Lang, Ruimin Wang, Zhe Chen, Chuanming Zhou
Summary: This study reports a newly discovered terminal Ediacaran biotic assemblage in northwestern China, containing Ediacara-type fossils. The co-occurrence of these fossils helps constrain the depositional age and reveals the late Ediacaran glaciation.
Article
Geochemistry & Geophysics
Yajun Xu, Xiao Liang, Peter A. Cawood, Jian-Wei Zi, Hangchuan Zhang, Jia Liu, Yuansheng Du
Summary: By analyzing the U-Pb ages of detrital monazite from Cambrian sedimentary rocks, we suggest that South China was located outboard of northeastern India. The detrital monazite ages indicate input from earliest Cambrian metapelites and provide tighter constraints on the paleogeography of South China compared to detrital zircon data alone.
Article
Geosciences, Multidisciplinary
Niptika Jana, Chandrani Singh, Arun Singh, Tuna Eken, Arun Kumar Dubey, Abhisek Dutta, Arun Kumar Gupta
Summary: This study presents the shear-wave velocity structure of the crust and upper mantle below the Eastern Ghats Mobile Belt and adjacent Archean cratons. The observed variations in crustal and lithospheric architecture provide insights into the deformations caused by the collision and rifting of India and East Antarctica, as well as the assembly and breakup of Rodinia and Gondwana supercontinents. The findings reveal significant changes in the thickness and nature of the crust and lithosphere in different regions, possibly attributed to collisional thrusting and magmatic underplating.
Article
Geochemistry & Geophysics
Chang-Cheng Huang, Hao Zou, Leon Bagas, Hai-Feng Chen, Bin Xiao, Xiu-Wei Jiang, Min Li, Cheng-Hui Hu, Li-Ming Yu
Summary: The northern margin of the Yangtze Block in South China has experienced two high-temperature rifting-related events at around 830-780 Ma and 750-700 Ma. These events are likely associated with a rifting environment and mantle plume activity.
Article
Geochemistry & Geophysics
Hao Zou, Qiu-Li Li, Leon Bagas, Xuan-Ce Wang, An-Qing Chen, Xian-Hua Li
Summary: This study reports Neoproterozoic (ca. 785-780 Ma) granites with low-delta O-18 values from the western margin of the Yangtze Block, which are linked to assimilation of syn-magmatically altered rocks and have their source constrained by high temperature hydrothermal alteration. The zircons exhibit a decrease in delta O-18 values from core to rim, indicating a remelting process at high temperatures.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Weihua Yao, Xiaoyu Zhu, Jian Wang, Xiaolin Zhou, Christopher J. Spencer, Zheng-Jiang Wang, Zheng-Xiang Li
Summary: This study reveals the South China Block's process of joining Gondwana, its position within Gondwana, and its relationship with the Indochina Peninsula through the analysis of new samples. The uplift of the South China Block is believed to be a result of tectonic compression from the collision with Indian Gondwana.
PRECAMBRIAN RESEARCH
(2022)
Article
Business
Suma Athreye, Abubakr Saeed, Muhammad Saad Baloch
Summary: Chinese and Indian multinational companies have different survival rates in their outward investments in the North and the South. Investments in the North face stronger competition from domestic firms due to their technological and managerial capabilities, resulting in weaker survival rates. On the other hand, in the South, where Chinese and Indian firms enjoy competitive advantages and industrial leadership, they have better survival rates. Additionally, the presence of a larger diaspora in Southern locations is associated with greater survival.
JOURNAL OF BUSINESS RESEARCH
(2023)
Article
Geology
Fuhao Xiong, Qing Liu, Mingcai Hou, Shengwu Yan
Summary: This study provides detailed geochronological, geochemical, and isotopic data to investigate the petrogenesis and geodynamic setting of Neoproterozoic mafic dyke swarms in the western Yangtze Block, South China. The results suggest that the dykes may have originated from different degrees of melting of the enriched mantle wedge that was metasomatized by subducted slab-related fluids and melts. The geochemical database compilation indicates that the Yangtze Block may be located on the periphery of the Rodinia supercontinent and slab tearing or break-off may account for the Rodinia break-up and associated transition of the mantle metasomatic mechanism.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Jie Yuan, Chenglong Deng, Zhenyu Yang, Wout Krijgsman, Huafeng Thubtantsering, Huafeng Qin, Liang Yi, Pan Zhao, Bo Wan, Liang Zhao, Huaiyu He, Zhengtang Guo, Rixiang Zhu
Summary: Knowledge of the size of Greater India is crucial for understanding the geodynamic processes of the India-Asia collision. Recent studies have revealed the rapid drift of the Tibetan Himalaya during 75-61 Ma, leading to a triple-stage collision scenario. This research provides an improved estimate of the size of Greater India and supports the reconstructions of Indian continental crust behavior and the India-Asia collision system.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Wei Wang, Christopher Spencer, Manoj K. Pandit, Yuan-Bao Wu, Jun-Hong Zhao, Jian-Ping Zheng, Xiao-Ping Xia, Gui-Mei Lu
Summary: River sand detrital zircons from the Peninsular Indian cratons were analyzed for their U-Pb, Lu-Hf, and O isotopes to understand the crustal evolution of the Indian Shield and its role in supercontinent cycles. The zircon samples exhibit distinct age peaks and isotopic compositions, indicating a discrete evolutionary history for the Indian Shield. The study suggests that the Indian Shield occupied a peripheral paleo-position during the assembly of Precambrian supercontinents, and experienced collision events and subduction systems. The analysis also reveals variations in isotopic signatures and oxygenation levels, suggesting changes in sedimentary reservoirs and the role of continental crust addition during the supercontinent cycle.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geology
Wangchao Li, Changqing Yin, Zeming Zhang, Peter A. Cawood, Shun Li, Jian Zhang, Huixia Ding, Jiahui Qian, Yanling Zhang
Summary: This study reports the discovery of poly-cyclic high-pressure low-temperature rocks in the easternmost Indus-Yarlung suture zone, which were formed during the subduction of Neo-Tethyan oceanic lithosphere. The research includes petrology, mineral composition analysis, and P-T pseudosection modeling. The findings reveal a complex metamorphic history involving multiple low-temperature eclogite facies events.
JOURNAL OF METAMORPHIC GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Yuto Sato, Eiichi Takahashi, Chang-Ming Xing, Li Li, Ze-Xian Cui, Wan-Feng Zhang, Xiao-Ping Xia
Summary: This study presents the depth profile of water content in the mantle, including the lithosphere-asthenosphere boundary (LAB), based on the analysis of peridotite xenoliths from Northeast Japan. The results show that there is no water content contrast across the LAB, supporting the "partial-melting model" for its origin.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Chemistry, Analytical
Wan-Feng Zhang, Xiao-Ping Xia, Sato Yuto, Takahashi Eiichi, Ze-Xian Cui, Yan-Qiang Zhang, Qing Yang, Ya-Nan Yang, Li Li, Yi-Gang Xu
Summary: Secondary ion mass spectrometry (SIMS) is a powerful technique for measuring trace amounts of water in minerals. The matrix effect caused by the substrate's structure and chemistry highlights the importance of using reference materials with similar properties for calibration. This study investigates newly developed reference materials for SIMS water content analysis and confirms their suitability for use as reference materials.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Geochemistry & Geophysics
Shuwen Dong, Jianhua Li, Rui Gao, Peter A. Cawood, Hans Thybo, Stephen T. Johnston, Liqing Jiao, Yueqiao Zhang, Jinming Wang
Summary: In the Cretaceous extensional system of South China, lithospheric extension is mainly accommodated by localized normal faulting and distributed ductile stretching in the lower crust, followed by localized crustal necking and Moho uplift. These crustal and mantle features are kinematically linked, with lower-crustal stretching compensating for upper-crustal thinning and mantle shear zones affecting localized Moho uplift and crustal necking. The extension mechanism varies laterally from magma-poor to magma-rich conditions, resulting in changes in crustal melting, decoupling, and lithospheric mantle configuration.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Pei-yuan Hu, Qing-guo Zhai, Peter A. Cawood, Roberto F. Weinberg, Guo-chun Zhao, Yue Tang, Yi-ming Liu
Summary: Paleogeographic reconstruction of Precambrian terranes reworked by Phanerozoic orogens, such as the Tibetan Plateau, reveals complex lithotectonic relations due to intracrustal reworking. Global and regional detrital zircon rare earth element (REE) databases show trends in LREE/HREE and Eu/Eu* that record the crustal evolution of the source and provide a new approach for paleogeographic reconstructions. By analyzing sedimentary and igneous rocks in the Lhasa terrane and detrital zircon samples from the northern margin of Gondwana, it is demonstrated that the Lhasa terrane had an African affinity in the Rodinia-Gondwana supercontinent cycles (ca. 1.4-0.4 Ga).
GEOPHYSICAL RESEARCH LETTERS
(2023)
Letter
Geochemistry & Geophysics
Gui-Me Lu, Peter A. Cawood, Christopher J. Spencer, Andrey Bekker, Yi-Gang Xu, Zhuosen Yao, Wei Wang
Summary: By investigating the La/Zr ratio of continental-arc mafic volcanic rocks, this study reveals that rocks related to Gondwana assembly have higher La/Zr ratios compared with those formed during Rodinia assembly. This implies that younger supercontinents have thicker continental arcs, which affect the interaction between rocks and the Earth's surface.
Article
Environmental Sciences
Shihua Zhong, Sanzhong Li, Yang Liu, Peter A. Cawood, Reimar Seltmann
Summary: Using machine learning, researchers analyzed the Jack Hills zircons and found that majority (around 70%) were sourced from igneous and sedimentary type granites, indicating the presence of rocks other than trondhjemite-tonalite-granodiorite suite in Earth's earliest continental crust.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Qi-Wei Li, Oliver Nebel, Jun-Hong Zhao, Rui Wang, Yona Jacobsen, Marianne Richter, Qiang Wang, Peter A. Cawood
Summary: Rocks with adakitic affinities in continental collision zones provide important information about crustal thickening. Traditional understanding suggests that residual garnet during partial melting of the lower crust is responsible for heavy rare earth element and Y depletion in these rocks. However, this study finds that magmatic garnet is rarely observed and amphibole is proposed as an abundant phase in the lower arc crust. The authors report the isotopic compositions of adakitic intrusions, suggesting an amphibolite source and an existing, older crustal foundation. Rating: 8/10.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Eric D. Vandenburg, Oliver Nebel, Peter A. Cawood, R. Hugh Smithies, Fabio A. Capitanio, Laura A. Miller, Marc-Alban Millet, Emilie Bruand, Jean-Francois Moyen, Xueying Wang, Massimo Raveggi, Yona Jacobsen
Summary: Research shows that ancient continental cores, cratons, are not as stable and impermeable as previously thought. Variations in lithospheric thickness within cratons can facilitate fluid movement, leading to elemental redistribution and mineralization.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Gui-Mei Lu, Wei Wang, Richard E. Ernst, Hafida El Bilali, Christopher J. Spencer, Yi-Gang Xu, Andrey Bekker
Summary: The delay in eukaryote expansion during the transition between the supercontinents Columbia and Rodina is possibly due to extensive crustal differentiation. This study shows an increase in phosphorus-poor felsic volcanic and plutonic rocks and a low weathering intensity during this transition. The decelerated weathering of these rocks may have limited the flux of bio-essential nutrients to the oceans, leading to low primary productivity and atmospheric oxygen levels, which inhibited biologic radiation during the Columbia-Rodinia supercontinent transition period.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Kun Zhou, Yi-Xiang Chen, Jia-Wei Xiong, Hans-Peter Schertl, Xiao-Ping Xia
Summary: This study investigates the impact of fluid action on zircon geochemistry in subduction zones, particularly during metamorphic and metasomatic processes. The results show that fluid action significantly affects the U-Pb and O isotope systems of zircon, especially when external metasomatic fluids are involved.
GEOSCIENCE FRONTIERS
(2023)
Article
Geochemistry & Geophysics
Jianghai Yang, Peter A. Cawood, Xiaoping Yuan, Dongxun Yuan, Yinsheng Zhou, Ao Liu, Jianzhong Liu, Yuansheng Du
Summary: This study explores the impact of hydroclimate on landscape erosion using sedimentary records from the late Permian. The findings reveal a negative carbon isotope excursion and a decrease in weathering intensity in the middle Wuchiapingian period. The results suggest a correlation between increased denudation rates and a decrease in paleosalinity, possibly due to higher precipitation.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Qijing Chen, Zhong-Yuan Ren, Xiao-Ping Xia, Le Zhang, Qing Yang, Chao Yuan
Summary: A study on the Dali picrites, part of the Emeishan Large Igneous Province (ELIP), reveals that the olivine-hosted melt inclusions have varying water content and hydrogen isotope ratios. Some inclusions underwent diffusion and degassing, while others preserved their magmatic signatures due to rapid cooling. The results suggest that the ELIP was moderately hydrous, sourced from recycled oceanic crust and metasomatized mantle peridotite.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
Er-Kun Xue, Wei Wang, David Chew, Manoj K. Pandit, Xin Deng, Yang Tian, Xi-Run Tong, Jun-Hong Zhao
Summary: The study reveals the presence of water-fluxed melting during the Wuyi-Yunkai Orogeny in South China. These water-fluxed melting quartzo-feldspathic migmatites formed during the early Paleozoic and were melted through reactions involving water-saturated quartz, feldspar, biotite, and K-feldspar. The findings highlight the significance of water-fluxed anatexis in the differentiation of the continental crust during orogenesis.