Article
Geochemistry & Geophysics
Xianchun Tang, Shasha Liu, Dailei Zhang, Guiling Wang, Yinfei Luo, Shengbiao Hu, Qiang Xu
Summary: Recent advances in geothermal exploration in the Gonghe Basin have provided insights into the origin and emplacement of hot dry rock (HDR). Through integrating boundary faults distribution, springs and geothermal borehole data, and magnetotelluric data, it is proposed that the basin may have formed in a zone of slip dissipation between two major left-lateral strike-slip faults. The basin has experienced two-phase developments, leading to the formation of high-temperature and shallow-burial HDR in specific geothermal areas.
Article
Geology
Sergei A. Kasatkin, Andrei V. Grebennikov
Summary: Various types of early Palaeogene calderas indicating transtensional and transpressional structures have been identified in southern Sikhote-Alin. These volcanic structures formed due to left-lateral displacements within the territory. The analysis shows a regional S-shaped structure named the 'sinistral kink band of southern Sikhote-Alin'. The early Palaeogene magmatic activity is considered as a marker of left-lateral displacements due to oblique interactions between continental and oceanic plates.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Yang Zhang, Qingda Feng, Fucheng Li, Linyou Zhang, Chao Zhang, Senqi Zhang, Dunpeng Li, Zhen Yan, Jian Song, Lei Fu, Zhaoxuan Niu
Summary: Three deformation stages were identified in the Qiabuqia region of the northeastern Qinghai-Tibet Plateau, including the overall uplift during the Late Cenozoic and specific deformation stages in the eastern areas. Drilling data from the DR4 borehole indicate that the buried depth of the Xiangshuihe Formation is about 1,000 meters. These findings provide a robust geological basis for exploring and utilizing hot, dry rock resources within the Gonghe Basin.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Xijun Ni, Qiang Li, Tao Deng, Limin Zhang, Hao Gong, Chao Qin, Jingsong Shi, Fuqiao Shi, Shubing Fu
Summary: Yuomys are medium-sized rodents from low elevation areas in China. Two new species of Yuomys were discovered in the Gemusi pull-apart basin in the Hengduan Mountains and the Chake Basin in Yunnan Province. These findings suggest that these species lived in low elevation forest environments during the early middle Eocene.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Xinnan Li, Ian K. D. Pierce, Jayne M. Bormann, William C. Hammond, Zhuqi Zhang, Chuanyou Li, Wenjun Zheng, Peizhen Zhang
Summary: The study used a GPS block model to investigate tectonic deformation in the northeastern Tibetan Plateau and its surroundings, highlighting the importance of including less active faults for a closer examination of strain partitioning. The predicted motion directions and slip rates of active faults in the preferred model were found to be consistent with geological estimates, supporting the assumption that decadal GPS slip rates are representative of millennial-scale geologic slip rates. The observed fault kinematics in the region were interpreted as the result of relative motions between different blocks and block rotations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Shumin Liang, Wenjun Zheng, Dongli Zhang, Hui Peng, Xin Sun, Shiqi Wei
Summary: This study reconstructed the earthquake history of the Qilian-Haiyuan fault zone in the northeastern Tibetan Plateau during the Holocene and proposed the concepts of earthquake migration and earthquake clusters, highlighting the importance of earthquake triggering.
Article
Geosciences, Multidisciplinary
Qi Su, Xianyan Wang, Daoyang Yuan, Huiping Zhang, Huayu Lu, Hong Xie
Summary: Based on the analysis of channel steepness and main divide migration, this study confirms the activity and evolution of the Qinghai Nanshan mountain range. The results indicate that the thrust fault in this area is still active, causing uplift of the range and migration of the main divide. The influence of the Qinghai Nanshan and Gonghe Nanshan on regional crust deformation is also significant, as these secondary active tectonics promote slip transferring and strain regulation.
Article
Geosciences, Multidisciplinary
Peng Shu, Xiwei Xu, Shaoying Feng, Baojin Liu, Kang Li, Paul Tapponnier, Xiaojuan Deng, Guihua Chen, Nuan Xia, Hongtai Xu, Jingjing Qin, Fubing He, Yan Ma, Rongzhang Zheng
Summary: This paper examines the sedimentary and tectonic evolution of the Banquan Basin through seismic reflection exploration, borehole detection, and cosmogenic nuclide chronology. The study reveals that the basin underwent three evolutionary stages: weak rifting, strong extension, and subsidence. Additionally, the study finds that the sedimentary filling of the basin strongly responds to the pull-apart and extension processes.
SCIENCE CHINA-EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Yuye Feng, Hao Long, Fei Yang, Fan Yang, Hongyi Cheng, Ganlin Zhang
Summary: By studying a 2,800-year peat record from the northeastern Qinghai-Tibet Plateau, the researchers identified the aeolian origin of archived particles and found that dust input was enhanced during warming periods. They proposed that warming climate may have significant impact on moisture balance and wind strength, leading to more frequent dust activity in the future.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Fan Gao, Olaf Zielke, Zhujun Han, Peng Guo, Hailong Gai, Chenglong Dai
Summary: This study investigates the strain transfer and seismic activity between the middle and eastern sections of the Lenglongling fault (LLLF) and the Jinqianghe fault (JQHF) on the NE Tibetan Plateau. The results suggest a gradual strain transfer and similar seismic activity between the two sections, with evidence of concurrent rupture in at least three previous earthquakes during the Holocene. However, there is no reported concurrent failure of the middle LLLF and JQHF, indicating that they may act as independent seismo-tectonic entities without substantial strain transfer.
Article
Geochemistry & Geophysics
Xinyan Li, Xiaopeng Liu, Jianguo Du, Yueju Cui, Fengxia Sun
Summary: The hydrogeochemical characteristics and groundwater recharge environments along the deep-cut Haiyuan-Liupanshan fault zone (HLFZ) were investigated. The study found that the groundwater in HLFZ can be divided into two groups based on chemical types. It also revealed that groundwater contamination in HLFZ is severe, with most sites classified as unfit for drinking water or agriculture. The study further showed that meteoric water is the dominant source of groundwater, influenced by the water cycle and water-rock reaction. The tectonic movement, seismicity, and deformation level along HLFZ are important factors affecting groundwater migration and water-rock reactions.
Article
Geosciences, Multidisciplinary
Lei Jinghao, Li Youli, Ren Zhikun, Hu Xiu, Xiong Jianguo, Liu Fei, Liu Jinrui
Summary: It is commonly assumed that thrust faults have a constant slip rate and uplift along their strike, but the study found variable slip rates and offsets, reflecting the complex fault behavior and relationships with adjacent faults. The research in the East Qilian Shan region suggests that the thrust faults in this area may consist of two segments, and discusses the deformation propagated northeastward along the northeastern margin of the Tibetan Plateau.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Chuanyong Wu, Peizhen Zhang, Zhuqi Zhang, Wenjun Zheng, Binbin Xu, Weitao Wang, Zhongyuan Yu, Xunye Dai, Boxuan Zhang, Kezhi Zang
Summary: A previously overlooked strike-slip component of crustal deformation in the reactivated Tianshan orogenic belt has been documented. This non-negligible strike-slip component provides insights into the ongoing India-Eurasia collision in the Tianshan region. The study reveals the existence of left-lateral faulting and high strain zones in the Tianshan interior, which suggest high seismic geohazard zones in addition to the foreland thrust systems.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Lingqiang Zhao, Yan Zhan, Qingliang Wang, Xiangyu Sun, Ming Hao, Yiqing Zhu, Jing Han
Summary: The Lajishan tectonic belt in the northeastern Tibetan Plateau is the most recently active orogenic belt, and the deep electrical structure beneath this belt has been revealed through magnetotelluric (MT) measurements, providing insights into tectonic deformation patterns and crustal electrical structures. The study shows that the high-conductivity layer is related to geological structures and seismic activities.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geography, Physical
Yi Zhang, Dan-Ping Yan, Liang Qiu, Lingxiao Gong, Yumeng Shao
Summary: This study integrates structural analysis with new thermochronological data to understand the cooling, exhumation, and uplift history of the Panxi tectonic belt. The findings suggest two major cooling and deformation events in the late Eocene-Oligocene and the Middle-Late Miocene, indicating a diachronous uplift process of the southeastern Tibetan Plateau. Crustal deformation and lower-crustal ductile channel flow are believed to have played significant roles in promoting uplift.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)