Article
Geochemistry & Geophysics
Aiqing Ren, Zaicong Wang, Keqing Zong, Zhaochu Hu, Huai Cheng, Xiang Wang, Wen Zhang, Weijun Chen
Summary: Refertilization of fertile garnet lherzolites occurs during peak-UHP metamorphic stages in a continental subduction channel, as shown by the presence of abundant clinopyroxene and garnet, low Mg# and high Al2O3. The metasomatic agents for refertilization are likely basaltic-intermediate melts incorporating continental materials.
Article
Geosciences, Multidisciplinary
Zhu Shaogong, Liang Yingjie, Zhang Yuquan, Li Zian
Summary: By analyzing the paragneiss from Xinxian area along the west edge of the Dabie-Sulu ultrahigh-pressure metamorphic belt, it is revealed that the protolith of the paragneiss may be formed by terrestrial materials, and it was formed later than the Triassic, with the main protolith age falling between 705-811 Ma.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Penglei Liu, Zhenmin Jin
Summary: This study investigated the metamorphic evolution of a tremolite marble from the Dabie ultrahigh-pressure terrane in China by analyzing zircon. The zircon in the marble experienced a complex recrystallization and growth history under different facies conditions. The mineral inclusions in zircon provided insights into the formation environment and metamorphic processes. The U-Pb dating of zircon yielded a wide age range, indicating prolonged subduction and exhumation during the Triassic period.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Rong Chai, Jianghai Yang, Tao Deng, Xiumian Hu
Summary: This study systematically investigates the Qinling-Dabie-Sulu orogen in the Central China Orogenic Belt and compiles a large dataset of detrital zircon U-Pb ages and Hf isotopes. The findings reveal unique tectonic evolution histories for different tectonic units within the orogenic belt during various geological epochs. These data can help constrain the tectonic framework and orogenic evolution, contributing to a better understanding of the Central Orogenic Belt in China and global plate tectonics.
GEOSCIENCE DATA JOURNAL
(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
Geochemistry & Geophysics
Wen-Tian Li, Shao-Yong Jiang, Bin Fu, De-Liang Liu, Suo-Fei Xiong
Summary: The study reveals that the early granitoids in the Tongbai-Hong'an-Dabie region were mainly produced by partial melting of the lower crust, involving a mixture of the subducted lower crust and the Kongling Complex. With time, ore-forming granitoids show increasing zircon Hf-O isotopic compositions and oxygen fugacity trends, potentially indicating the sources and background for the formation of early-stage Mo deposits.
Article
Geosciences, Multidisciplinary
Ondrej Kryza, Prokop Zavada, Tan Shu, Jiri Semerad
Summary: This study investigates the geometric, kinematic, and dynamic behavior of crustal-scale detachment folds using heated paraffin wax as an analogue. Five different regimes of lower crustal deformation were identified, and the evolution of folds was found to be asymmetrical. The study also revealed flexural flow of the lower weak crust and pressure gradients in the fold cores controlling the injections and outflows of molten material.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Liu Wei, Guo Zhen, Chen YongShun, Zhang AnQi
Summary: By integrating seismic data and utilizing high resolution imaging techniques, detailed structures of the crust and uppermost mantle in the Qinling-Tongbai-Dabie orogenic belt were revealed. The study found that Moho depth gradually becomes shallower from west to east along the profile, and high velocity anomalies exist in both the crust and uppermost mantle.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2021)
Article
Geochemistry & Geophysics
Jinlong Yao, Liangshu Shu, Guochun Zhao, Yigui Han, Qian Liu
Summary: The study reveals that the Neoproterozoic Jiangnan accretionary orogenic belt formed the South China Block, characterized by extensional granite-cored domes and top-to-the-E thrusting structures, possibly developed within the context of slab roll-back event and continental margin accretion.
JOURNAL OF GEODYNAMICS
(2021)
Article
Geology
Nicholas Ferry, Daniel Sturmer, Dylan Ward, Wanda Taylor, Carlton Brett
Summary: Landslide deposits are common in basin fill, and detailed field analysis can aid in interpreting and reconstructing ancient landslide events. This study focuses on the Blue Diamond landslide breccia in Nevada, USA, and proposes a two-phase emplacement history based on sedimentological data and observations. The excessive mobility of the Blue Diamond landslide was driven by flow entrainment of large Aztec Sandstone boulders and interaction with a saturated runout path substrate.
JOURNAL OF SEDIMENTARY RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Dominique Jacques, Philippe Muchez, Manuel Sintubin
Summary: Many studies suggest that late-Variscan buckling contributed to the arcuate geometry of the Ibero-Armorican belt, with poorly studied Late Carboniferous intramontane basins providing valuable insight into the late- to post-Variscan tectonics. Understanding this helps constrain the emplacement mode of contemporaneous mineralization, such as W-Sn-Nb-Ta-Li deposits.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2021)
Article
Geosciences, Multidisciplinary
Zhenhua Xue, Wei Lin, Yang Chu, Michel Faure, Yan Chen, Wenbin Ji, Huaning Qiu
Summary: The Longmenshan Thrust Belt in Eastern Tibet was formed during a Mesozoic orogeny and Cenozoic reworking. Detailed structural analysis reveals that the thrust belt can be divided into a Southeastern Zone and a Northwestern Zone, both of which experienced major tectonic events. Geological data suggests that episodic imbrication of basement slices occurred during the Late Jurassic-Early Cretaceous and Late Cretaceous-earliest Paleocene, leading to the exhumation of amphibolite facies rocks.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Crystallography
Yu Liu, Qiuli Li, Guoqiang Tang, Xianhua Li
Summary: Apatite is widely used in geological research, with a new analytical procedure allowing for simultaneous measurement of multiple chemical characteristics, improving analysis efficiency and data consistency.
Article
Chemistry, Analytical
Lin Wu, Jie An, Fei Wang, Liekun Yang, Xiaoming Shen, Zhiyong Zhang, Chao Huang, Rong Ren, Bo Liu, Wenbei Shi, Yinzhi Wang
Summary: The in situ laser (U-Th)/He and U-Pb double dating technique using zircon has been proven to be a powerful tool for sedimentary provenance studies. The recently developed laser microanalysis technique offers advantages such as higher spatial resolution and improved safety. A new natural zircon reference material, SA01, has been reported for in situ (U-Th)/He and U-Pb double dating, which showed consistent results with traditional single-crystal laser fusion He determination and U-Th isotope dilution.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Analytical
Aleksey E. Melnik, Qiu-Li Li, Jiao Li, Guo-Qiang Tang, Lian-Jun Feng, Jin-Hua Li, Qian Mao, Benita Putlitz, Xian-Hua Li
Summary: Lawsonite is a water-rich mineral that forms in cold subduction zones and can be used to study subduction-related fluids. This study characterizes LM-19 lawsonite as a potential reference material for oxygen isotopic microanalysis and provides its reference value.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Geochemistry & Geophysics
Wei Wei, Wei Lin, Yan Chen, Michel Faure, Wenbin Ji, Quanlin Hou, Quanren Yan, Qingchen Wang
Summary: The magmatic tempo in an active plate margin is influenced by the tectonic evolution of underlain subduction slabs. This study reveals that the collision between the Dangerous Grounds-West Philippines Block and the South China Block (SCB) caused a shortening regime, leading to a decrease in magmatic activity in the CNB. It demonstrates the importance of tectonic processes in controlling magmatism in continental margin.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Yinzhi Wang, Fei Wang, Wenbei Shi, Liekun Yang, Lin Wu
Summary: The 40Ar/39Ar dating method requires a neutron flux monitoring reference material. The availability of the commonly used Alder Creek sanidine as a reliable indicator for Quaternary materials is limited in many laboratories. A new sampling method of Alder Creek rhyolite has been developed to produce pure and fresh sanidine crystals, which can be used as a new batch of the reference material. The newly selected grains of sanidine were meticulously dated and calibrated against international reference materials to evaluate their homogeneity and reproducibility.
APPLIED GEOCHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Yi Zou, Ross N. Mitchell, Xu Chu, Michael Brown, Jilian Jiang, Qiuli Li, Lei Zhao, Mingguo Zhai
Summary: The thermal state of the mantle affects lithospheric dynamics and Earth's surface evolution. Geodynamic simulations suggest that aggregated continents may lead to mantle warming and weaker continental lithosphere, resulting in lower-relief orogens during the mid-Proterozoic period. This weakened lithosphere reduced erosion, limited nutrient delivery to the oceans, hindered oxygen accumulation, and stalled surface evolution.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Jiangbo Hao, Chao Wang, Shuai Zhang, Liang Liu, Wenbin Ji, Joseph G. Meert, Hanning Wu, Hang Li, Zunpu Yu, Xiaokui Sun, Deqing Ma, Yongsheng Gai
Summary: The U-Pb ages and Hf isotopic composition of detrital zircons are used to determine the position of the Qaidam block in the Rodinia supercontinent. The results suggest that the Qaidam block was located along the northeast Laurentian margin during the assembly of Rodinia.
Article
Geochemistry & Geophysics
L. Zhao, H. Tang, R. N. Mitchell, Q. L. Li, X. W. Zhou, M. G. Zhai
Summary: The joining of North and South China formed the East Asian continent and the Dabie-Sulu orogenic belt. Determining the time of their initial collision is crucial for understanding the orogenic processes. New dating results suggest a Middle Permian collision, which indicates that continental collisions in East Asia occurred before the end-Permian mass extinction.
Article
Geochemistry & Geophysics
Lixia Feng, Baofu Han, Lin Wu, Zhongpeng Han, Jiawei Zhang, Mei Liu
Summary: The initial timing of extension during the Cenozoic around the northeastern margin of the Ordos Block has been investigated using low-temperature thermochronology. The results show extensive cooling during the Late Cretaceous and differential cooling during the Late Paleocene-Eocene, indicating denudation in the region and tilting of the eastern Daqingshan Mountains. The study also suggests a regional extension event and the possible contribution of subduction of the Izanagi-Pacific plate and India-Asia collision.
Article
Multidisciplinary Sciences
Qing Zhang, Lei Zhao, Dawn Zhou, Allen P. Nutman, Ross N. Mitchell, Yu Liu, Qiu-Li Li, Hui-Min Yu, Billy Fan, Christopher J. Spencer, Xian-Hua Li
Summary: Studying silicon and oxygen isotopes in the oldest rocks on Earth helps understand crustal recycling and the geological evolution of early Earth.
Article
Geosciences, Multidisciplinary
Hadi Shafaii Moghadam, Qiu-Li Li, William L. Griffin, Xian-Hua Li, Orhan Karsli, Christopher J. Spencer, Jose F. Santos, Maria Kirchenbaur, Sobhi Nasir, Suzanne Y. O'Reilly
Summary: Understanding the crustal growth, reworking, and geodynamics of the northern continental margin of Gondwana during the Ediacaran to Silurian times is crucial for the paleogeographic reconstruction of Gondwana. This study uses various analytical methods to evaluate the magmatic history of this region and obtain relevant detrital zircon data. The results provide valuable insights into the crustal evolution and tectonic activities in the northern Gondwana region.
Article
Environmental Sciences
Meng-Hao Gao, Ping-Ping Liu, Sun-Lin Chung, Qiu-Li Li, Bin Wang, Wei Tian, Xian-Hua Li, Hao-Yang Lee
Summary: Understanding the processes of subducted sediment recycling in subduction zones is crucial for deciphering the interactions between Earth's crust and mantle. This study examines Quaternary arc basalts and andesites from Sumatra Island, Indonesia, using along-arc geochemical variations and zircon U-Pb-Hf-O isotopes to assess the mode of sediment recycling in subduction zones. The findings indicate that some of the volcanic rocks near Toba Caldera derive their composition from subducted terrigenous sediments, which mix with the mantle. Furthermore, thermodynamic modeling suggests that the subducted sediments do not melt on the slab surface, but instead form diapirs that rise buoyantly through the hot mantle wedge and contribute to a significant portion of the magma source.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Jing-Yao Xu, Qiu-Li Li, Guo-Qiang Tang, Kai Lu, Yu Liu, Lian-Jun Feng, Joan Carles Melgarejo
Summary: This study developed an accurate and rapid online matrix effect calibration method for dolomite oxygen isotope analysis. Compared to the traditional off-line procedure, this method offers higher accuracy and analytical efficiency.
ANALYTICAL CHEMISTRY
(2022)
