Article
Geosciences, Multidisciplinary
Wang Xu, Nigel C. Hughes, Lishuang Liu, Wen Zhang, Pinghua Liu
Summary: This study uses large sample zircon age data and mixing modeling method to investigate the paleogeographic position of the Lhasa terrane. The results suggest that during the Permo-Carboniferous, the Lhasa terrane received sediment from northwest Australia, aligning with stratigraphic and paleontological evidence from the northern margin of eastern Gondwana. The study highlights the effectiveness of the DZ mixing modeling method in constraining paleogeographic reconstruction.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Qing Wang, Di-Cheng Zhu, Peter A. Cawood, Sun-Lin Chung, Zhi-Dan Zhao
Summary: By analyzing the detrital zircon U-Pb age spectra and epsilon(Hf)(t) values of the glaciogenic diamictites (PCGDs) in different regions, it is found that the PCGDs in Lhasa have a different source from those in Southern Qiangtang and Tethyan Himalaya. The research suggests that the Lhasa PCGDs may have originated from Australia, while the PCGDs in Southern Qiangtang and Tethyan Himalaya may have come from India.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Zhen-Dong Tian, Cheng-Biao Leng, Xing-Chun Zhang, Feng Tian, Chun-Kit Lai
Summary: By studying the detrital zircons from the Paleozoic and Neoproterozoic rocks in the Yidun Terrane, it was found that there are significant differences in the zircon age spectra between these two periods. The zircon ages in the Neoproterozoic rocks are similar to coeval magmatic rocks in the South China Block, suggesting a connection between the Yidun Terrane and South China in the late Neoproterozoic. In contrast, the zircons in the Paleozoic rocks are derived from East Gondwana, the South China Block, and the Songpan-Ganze Terrane, indicating a collision between the Yidun Terrane and East Gondwana in the late Ediacaran to early Paleozoic.
PRECAMBRIAN RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Gong-Jian Tang, Peter A. Cawood, Derek A. Wyman, Wei Dan, Qiang Wang, Ya-Nan Yang
Summary: The evolution of the western Kunlun-Pamir region involved the opening and closing of several branches of the Paleo-Tethys Ocean. The absence of a magmatic arc between ca. 300-250 Ma was due to oceanic crust underthrusting, rather than oceanic subduction. This study provides an important example of how an oceanic basin opened and closed without oceanic subduction.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Anlin Ma, Xiumian Hu, Eduardo Garzanti, Marcelle Boudagher-Fadel, Weiwei Xue, Zhong Han, Ping Wang
Summary: Reconstructing the Mesozoic paleotectonic and paleogeographic evolution of marine Qiangtang basins is essential for understanding the evolution of diverse Tethyan oceanic seaways and pre-Cenozoic mountain building in the Tibetan Plateau, with significant implications for hydrocarbon exploration. The geological knowledge of these basins is, however, largely incomplete. This study provides new geological mapping, stratigraphic, structural, sedimentological, and provenance data to fill the gaps in understanding the evolution of Qiangtang basins.
Article
Geology
Anastassia Y. Borisova, Anne Nedelec, Nail R. Zagrtdenov, Michael J. Toplis, Wendy A. Bohrson, Oleg G. Safonov, Ilya N. Bindeman, Oleg E. Melnik, Gleb S. Pokrovski, Georges Ceuleneer, Klaus Peter Jochum, Brigitte Stoll, Ulrike Weis, Andrew Y. Bychkov, Andrey A. Gurenko
Summary: The study suggests that the formation of early crust may involve partial melting of hydrated peridotite interacting with basaltic melt at low pressure, providing a potential mechanism for the formation of Hadean zircons. Comparison of thermodynamic and geochemical modeling results with Jack Hills zircon suggests favorable similarities in crystallization temperature, trace-element contents, and mineral inclusions, supporting the hypothesis.
Article
Geochemistry & Geophysics
Anirban Mitra, Sukanta Dey, Pranab Das, Keqing Zong, Yongsheng Liu
Summary: Through the study of whole-rock geochemistry, detrital zircon U-Pb-Hf isotopes, and trace element data from Mesoarchean clastic rocks in two greenstone belts of the western Dharwar Craton, it is found that these rocks were derived from a strongly weathered stable continental provenance dominated by low-HREE TTGs and K-rich granites of shallow crustal origin. The detrital zircon U-Pb and Lu-Hf data indicate two major crust formation events, with the antiquity of the western Dharwar Craton traced back to at least 3.8 Ga. The detrital record suggests episodic crustal growth and reworking in the western Dharwar Craton during the Paleoarchean to early Mesoarchean period, possibly related to intraplate processes.
Article
Geochemistry & Geophysics
Hangyu Liu, N. Ryan McKenzie, Cody L. Colleps, Wei Chen, Yuancan Ying, Lisa Stockli, Apsorn Sardsud, Daniel F. Stockli
Summary: The study explores the utility of zircon TE data to record the tectonic history in Southeast Asia and reveals that variations in zircon element compositions reflect changes in geological evolution, tracking the transitions from continental collision to island-arc accretion phases.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Maria M. Machevariani, Alexey V. Alekseenko, Jaume Bech
Summary: The study on zircon from the Verkhneurmiysky intrusive series with Li-F granites reveals the morphological and composition evolution trends of zircon, emphasizing the important role of fluid phase. Zircon in biotite and zinnwaldite granites shows similarities in core composition but differences in trace element enrichment in the rims, indicating varying formation and alteration conditions within the granitoids.
Article
Geochemistry & Geophysics
Teimoor Nazari-Dehkordi, Laurence Robb
Summary: This study analyzes the trace element compositions of zircons from the Lebowa Granite Suite hosting the Zaaiplaats Sn mine, finding that zircons in granite rocks have a hydrothermal origin rather than being magmatic. It suggests that the formation of granite-hosted Sn deposits is related to a late-magmatic-hydrothermal fluid enriched in F, Cl, and B.
Article
Geosciences, Multidisciplinary
Daniel Kwayisi, Jeremie Lehmann, Marlina Elburg
Summary: New data on sandstones and shales in the Buem structural unit in Ghana, including zircon ages and isotope compositions, reveal horizontal stratification and foreland basin sequences with potential sources from the Amazonian Craton, Benino-Nigerian Shield, and West African Craton.
Article
Geochemistry & Geophysics
Fengbo Sun, Peng Peng, Deshun Zheng, Pengfei Zuo
Summary: This study focuses on the early Neoproterozoic sediments in the southern-southeastern North China Craton (NCC) and their significance in paleogeographic reconstruction. New detrital zircon U-Pb-Hf data is presented for sandstone samples from the Sangwon Supergroup in SE-NCC and the Wufoshan Group in S-NCC, along with published zircon U-Pb data to determine their provenance. The results suggest a maximum depositional age of approximately 1.0 Ga for the Sangwon Supergroup and a possible extension of the Xuhuai-Dalian-Pyongnam basins in the SE NCC for the Wufoshan Group. The zircon age spectra show major populations at different time intervals, with potential contributions from the NCC and the southwestern Congo craton. The findings support a connection between the NCC and the southwestern Congo/SE NCC-S Sao Francisco at around 0.9 Ga. These results provide important insights into paleogeographic evolution.
Review
Geosciences, Multidisciplinary
Yousef Zoleikhaei, Jacob A. Mulder, Peter A. Cawood
Summary: By analyzing the detrital zircon and rutile from the early Paleozoic Lalun Formation in Iran, it was found that most of the detrital sediments originated from the Neoproterozoic age, and the Arabian-Nubian Shield may be a more suitable source for the formation. This study reveals a complex pattern of sediment dispersal along the northern margin of Gondwana and challenges the idea of a well-mixed, far-travelled sand sheet.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Nguo Sylvestre Kanouo, Arnaud Patrice Kouske, Gabriel Ngueutchoua, Akella Satya Venkatesh, Prabodha Ranjan Sahoo, Emmanuel Archelaus Afanga Basua
Summary: Detrital zircons from the southern Meiganga gold-bearing placers were analyzed for trace element abundances and U-Pb ages, revealing that crustal-derived zircons mainly originated from granitic magmas, with few from mantle sources and of metamorphic origin. Age distinctions were made for igneous, anatectic, and syn-metamorphic zircons, providing insights into their formation conditions and provenance for tracking gold deposits.
Article
Geology
Shuo Zhang, Xing Jian, Alex Pullen, Ling Fu, Hanghai Liang, Dongming Hong, Wei Zhang
Summary: The study of detrital zircon U-Pb geochronology in river sediments from the Qilian orogenic belt reveals a complex tectono-magmatic history, with distinct age populations suggesting continental aggregation processes and ancient connections to supercontinents. The variability in detrital zircon age populations among different river sand samples highlights the need for caution when using them to track the tectono-magmatic history of complex orogens.
INTERNATIONAL GEOLOGY REVIEW
(2021)
Article
Geology
Qinglin Sui, Denghui Chen, Xiaojian Zhao, Xianfeng Zha, Jiming Sun, Lipeng Zhang, Xiaofeng Gao, Weidong Sun
Summary: This study provides information on the geological evolution of the Proto-Tethys Ocean by analyzing mineral geological data from the Tianshuihai Terrane. The results reveal that subduction-related magmatic activity in the Proto-Tethys Ocean occurred along the northern margin of the East Gondwana continent during the Late Neoproterozoic-Early Palaeozoic, gradually propagating to the east.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Engineering, Environmental
Zhaofei Liu, Ying Li, Zhi Chen, Zhidan Zhao, Ruilin Huangfu, Yuanxin Zhao, Lei Lei, Chang Lu
Summary: This study measured the concentrations and fluxes of soil gases including Rn-222, Hg and CO2 at the main active fault zones in the western margin of the Ordos block, China. The results showed that seismic activities were the main driving force behind the enhanced emissions of these gases, which had significant impacts on the atmospheric environment.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Geochemistry & Geophysics
Jin-Cheng Xie, Di-Cheng Zhu, Qing Wang, Liang-Liang Zhang, Feng Cong, Fei Nie, Ying-Huai Lu, Li Liu
Summary: This study examines the determination of Zr and Hf isotopes in new zircon reference materials using various methods and instruments, and finds that these zircons are suitable as reference materials.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Review
Astronomy & Astrophysics
Di-Cheng Zhu, Qing Wang, Roberto F. Weinberg, Peter A. Cawood, Zhidan Zhao, Zeng-Qian Hou, Xuan-Xue Mo
Summary: The continental crust in the southern Tibet region of the India-Asia collision zone is characterized by an overthickened layer of felsic composition with an underlying granulite-eclogite layer. Extensive data suggests that this crust experienced magmatism from 245 to 10 million years ago, with flare-ups at 185-90 and 55 million years ago caused by a combination of external and internal factors. The growth of this crust is attributed to a process of fractional crystallization, subduction-induced melting, and collision-induced melting, resulting in vertical stratification and density sorting of the Gangdese crust.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES
(2023)
Article
Geochemistry & Geophysics
Zhuang Miao, Xiaoqiang Li, Zhidan Zhao, Yaoling Niu, Bo Xu, Hangshan Lei, Jingkai Wu, Yiyun Yang, Qian Ma, Dong Liu, Qing Wang, Di-Cheng Zhu, Xuanxue Mo
Summary: Melts and fluids derived from subducting/subducted oceanic lithosphere play an important role in mantle compositional heterogeneity. This study focuses on post-collisional alkaline potassic rocks (PARs) beneath the southeastern Tibetan Plateau to examine the agents contributing to heterogeneous metasomatism of the sub-continental lithosphere (SCLM). The results indicate the influence of slab-derived components, including sediment-derived melts, ocean crust-derived supercritical fluids, and marine carbonates, on the mantle lithosphere.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Liang Chen, Zehui Zhang, Zhenping Tang, Yong Liu, Qinglin Sui, Wei Huang, Shan Liu, Peng Feng, Zhixin Guo, Haiyang He
Summary: The BCR continuous extraction method was used to obtain soil samples from a uranium mining area in northern Guangdong. The ecological risk of soil contamination elements in the study area was evaluated using the RSP and RAC evaluation methods. The results showed that the main contaminating elements, U and Mn, had high potential ecological risk, with different distribution states in the soil.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Weice Zhang, Zhidan Zhao, Dong Liu, Kunfeng Qiu, Qing Wang, Di-Cheng Zhu, Tiannan Yang, Yingchao Liu, Rui Wang, Zengqian Hou, Xuanxue Mo
Summary: Ore deposits in the Southern Lhasa Terrane that formed prior to the India-Eurasia collision are rare and not well understood. This study provides insights into the tectonic setting, geochemistry, and petrogenesis of the Kelu and Sangbujiala skarn Cu-Au deposits, which are associated with a Late Cretaceous magmatic flare-up.
Article
Geology
Lipeng Zhang, Jianghong Deng, Saijun Sun, Qinglin Sui, Kun Wang, Weidong Sun
Summary: This study confirms that during the Late Cretaceous, the ridge of the Neo-Tethys Ocean was mainly subducted beneath the southern margin of the Eurasian continent and identifies typical adakitic rocks derived from partial melting of subducted oceanic crust. This discovery is significant for understanding the evolution, magmatism, and mineralization of the Neo-Tethys tectonic domain.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Haiyang He, Tingting Wang, Qinglin Sui, Xianzhe Duan, Xuan Ren, Danping Hou, Yanshi Xie, Shan Liu, Peng Feng, Huanbao Zhang, Liang Chen
Summary: In this study, the early Paleozoic granites in the Jilongjie region, south-central Hunan Province, were analyzed using zircon U-Pb age, Hf isotope, and major and trace element data. The results suggest that these granites belong to the post-collisional granite type with alkaline metaluminous characteristics. The geochemical features reveal the enrichment of light rare earth elements and weak Eu anomalies. The zircon Hf isotope results indicate a mixture of crust-derived felsic and mantle-derived mafic magmas as the parent magma for the Jilongjie granite, which underwent fractional crystallization during ascent. The formation of Jilongjie granite is associated with post-collisional extensional setting and delamination of the thickened lithosphere.
Article
Geology
Ying Xia, Qinglin Sui, Yongkang He, Wenhua Ji, Denghui Chen, Xiaojian Zhao, Min Zhao, Xiaofeng Gao, Kun Wang, Lipeng Zhang, Haiyang He, Jinfeng Wang, Yue Chen
Summary: In this study, detailed fieldwork and various analytical techniques were used to investigate the Carboniferous Wuluate Formation volcanic rocks in the West Kunlun. The formation is characterized by a bimodal volcanic suite consisting of rhyolites and basalts. The results of dating and geochemical analysis suggest that the formation of these volcanic rocks is closely related to the evolution of the Paleo-Tethys.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Jialiang Li, Chen Wu, Lin Cheng, Hao Yang, Di-Cheng Zhu, Jingao Liu
Summary: Identifying the spatio-temporal variations of arc-related magmatism in the northern North China Block is crucial for understanding the subduction processes of the Paleo-Asian oceanic plate. Petrological, geochronological, and geochemical investigations reveal the presence of continental arc magmatism in the Early Paleozoic, followed by a period of flat-slab subduction and subsequent slab retreat in the late Paleozoic. The Carboniferous to Permian period is marked by northward younging and migration of calc-alkaline arc magmatism, indicating further subduction and opening of the mantle wedge along the northern North China Block.
Article
Geochemistry & Geophysics
Jingkai Wu, Hangshan Lei, Qian Ma, Zhidan Zhao, Fang-Zhen Teng, Shuangquan Zhang, Brian Cousens, Zhuang Miao, Yiyun Yang, Dong Liu, Qing Wang, Di-Cheng Zhu, Zengqian Hou, Xuanxue Mo
Summary: This paper presents a systematic study on Miocene-Holocene alkali basalts at the southeastern margin of Southeastern Tibetan Plateau. The results indicate that these basalts are comparable to the Cenozoic mantle-derived magmatism in Southeast Asia and may have originated from the Hainan plume.
Article
Geosciences, Multidisciplinary
Daniel E. Ibarra, Jingen Dai, Yuan Gao, Xinghai Lang, Pengzhen Duan, Zongjun Gao, Jiquan Chen, Katharina Methner, Lijuan Sha, Hui Tong, Xu Han, Dicheng Zhu, Yalin Li, Juxing Tang, Hai Cheng, C. Page Chamberlain, Chengshan Wang
Summary: Based on the comparison of triple oxygen isotopes, it is found that substantial uplift of the Gangdese Arc in southern Lhasa occurred by 63 to 61 million years ago before the collision of the Indian and Eurasian continental plates. This high palaeoelevation estimate challenges previous assumptions about the necessity of continent-continent collision for the formation of substantial topography in southern Tibet.
Article
Geology
Bing Qian, Wenyuan Li, Zhaowei Zhang, Qinglin Sui, Ji Shao, Yantong Feng
Summary: The Niubiziliang mafic-ultramafic complex in the South Altyn orogen contains various types of rock, including lherzolite, plagioclase-bearing lherzolite, olivine websterite, and gabbro. The complex exhibits a newly discovered zone of magmatic Ni-Cu sulfide mineralization, with drilling investigations confirming mineralization in complexes Nos. 2 and 3. Geochemical analysis reveals that the rocks originated from subalkaline magma and underwent igneous differentiation. The complex formed through a process of crustal contamination and fractional crystallization, and laser ablation inductively coupled plasma-mass spectrometry U-Pb dating indicates that the magma crystallized approximately 452 Ma ago.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Zhenzhen Wang, Zhidan Zhao, Xuping Li, Yuanku Meng, Dong Liu, Xuanxue Mo, Jun Lv, Fuyun Cong
Summary: This study investigates the geochemical characteristics, petrogenesis, and geodynamic implications of the early Jurassic A-type granitoids in Heihe, Xing'an block, in order to shed light on the evolution and spatial extent of the Paleo-Pacific tectonic regime.
Review
Geosciences, Multidisciplinary
Fuquan Yang, Xinxia Geng, Zhixin Zhang, Guoren Liu, Hanqing Zhang
Summary: Northern Xinjiang in China is an important part of the Central Asian Orogenic Belt, characterized by multiple episodes and types of mineralization. Cu and Au deposits are mostly found in Altay, Junggar, and Tianshan, with minor occurrences in Beishan. The most common types of Cu-Au deposits are volcanogenic and porphyry deposits. The formation of Cu-Au deposits can be divided into five mineralization episodes, with the Devonian and Carboniferous being the main periods. These deposits developed in various tectonic settings, including island arc, continental arc, collision, and postcollisional extensional tectonics.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Jiang Zhu, Dan-yang Liu, Chao Chen, Song Chen, Yuan-bing Zou, Leonid Danyushevsky, Jing-meng Huang, Xiang-wei Tang
Summary: Numerous lode gold and silver deposits have been discovered in orogenic belts in China. This study focuses on the formation and fluid evolutions of the super-large Yingdongpo gold and giant Poshan silver deposits in the Tongbai-Dabie orogen. The results suggest that both deposits were formed concurrently with Early Cretaceous granitic magmatism and the ore-forming fluids were primarily of magmatic origin with meteoric water inputting. The gold mineralization is related to a change in the physicochemical properties of the fluids, while the silver mineralization is favored by progressive deposition of sulfides in a slowly cooling hydrothermal system.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Arun Bhadran, B. P. Duarah, Drishya Girishbai, Mohammad Atif Raza, Avi Mero, Sandeep Lahon, A. L. Achu, Girish Gopinath
Summary: The Brahmaputra foreland basin, known for its dynamic tectonism and sediment load, exhibits a variety of seismically generated soft sediment deformation structures (SSDS) such as clastic dikes, sand sills, and micro-faults. These structures, influenced by multiple strong seismic events, are characterized by their dimensions, intrusion angles, cross-cutting relations, wall shattering, and age. The study suggests that a significant earthquake with high intensity and magnitude might have caused liquefaction features in the area. The findings highlight the importance of studying SSDS in tectonically active regions with limited surface ruptures and dense alluvial cover.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Huan Wang, Lirong Dou, Xingyang Zhang, Jiquan Yin, Beiwei Luo, Haigang Duan, Peiguang Yang, Yifan Song
Summary: Quantitative analysis of sediment composition and microfacies helped identify changes in facies belts in the Cretaceous Mishrif Formation. The study demonstrated the importance of carbonate microfacies quantification and its implications for paleogeographic research.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Boran Wang, Zhilong Huang, Dongsheng Xiao, Haiyue Yu, Wenren Zeng, Xin Wang, Tong Qu, Zhiyuan Li, Yizhuo Yang
Summary: By systematically analyzing the source rocks of the Sangonghe Formation in the Taibei Sag, NW China, and using kerogen kinetics modeling, this study reveals the influence of geological conditions on hydrocarbon generation and expulsion. The source rocks in different environments show distinct geochemical characteristics and hydrocarbon generation potential.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Haiying Yang, Zhifang Zhao, Haifeng Fan, Min Zeng, Jiafei Xiao, Xiqiang Liu, Shengwei Wu, Jiangqin Chao, Yong Xia
Summary: This paper investigates the REE enrichment and the role of Fe/Mn (oxyhydr)oxides in marine phosphorites from the early Cambrian period in South China. The study reveals that Fe/Mn (oxyhydr)oxides play a crucial role in REE enrichment and are controlled by Fe-redox pumping.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Qing Li, Hongbin Wang, Feng Cai, Di Luo, Fanxing Kong, Ang Li, Xiting Liu
Summary: The elemental and isotopic compositions and abundance of carbonates in marine sediments are used to reconstruct ancient climate and ocean conditions. This study analyzed sediment samples from the Okinawa Trough to examine the relationship between carbonates' compositions and methane seepage and sea-level changes. The results indicate that both biogenic and authigenic carbonates are important factors in understanding paleoclimate and paleoceanography.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Maryam Akbarzadeh Aghdam, Abdolreza Ghods, Farhad Sobouti, Khalil Motaghi, Keith Priestley, Mohammad Enayat
Summary: The Makran subduction zone is difficult to monitor due to limited seismic activity, but a temporary seismic network was installed to investigate the relationship between different regions and detect seismicity. The observed seismicity suggests the presence of structural boundaries and seismically inactive areas.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Zhen-Yu Wang, Hong-Rui Fan, Hai-Dong She, Kui-Feng Yang
Summary: This study conducted detailed geochemical, geochronological and isotopic analyses on the Songxian syenite in the Qinling Orogen. The results revealed the magma sources, petrogenesis and geodynamic implications of this alkaline intrusion. The study suggests that the syenite was formed through multiple stages of magmatism, involving the partial melting of the enriched lithospheric mantle and mixing with melts derived from the lower crust.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Yu Li, Wen-Liang Xu, Xiao-Ming Zhang, Jie Tang
Summary: This study presents new zircon U-Pb-Hf and whole-rock geochemical data for Jurassic intrusive rocks in the Yanbian area of NE China, providing insights into the subduction history of the Paleo-Pacific Plate. The study reveals three stages of Jurassic magmatism in the area, indicating the presence of an active continental margin related to the initial subduction of the Paleo-Pacific Plate beneath the Eurasian continent.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Lina Ai, Shengfa Liu, Shuai Cong, Hui Zhang, Peng Cao, Kaikai Wu, Wenxing Ye, Che Abd Rahim Mohamed, Xuefa Shi
Summary: This study investigates the depositional configurations and sedimentary environments of the Malacca Strait through analyzing grain size characteristics and hydrographic data. The results show that residual sediments are concentrated in the central region, while modern terrigenous sediments are distributed along the coast of Malaysia and the northern region. The sedimentary environments are influenced by seasonal variations and hydrodynamic conditions.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Liang Xiao, Jia-qi Liang, Li-yan Guo, De-shuang Ji, Man Yuan, Xiang-chuan Li, Nan Sun, Zuo-chen Li
Summary: This study investigates the correlation between stable carbon isotopes of plant fossils and CO2 levels in the Jurassic period. The results suggest a weak correlation between the two, indicating caution is needed when using stable carbon isotopes to reconstruct high paleo-CO2 concentrations.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xuli Yang, Feng Huang, Jifeng Xu, Xijun Liu, Liying Zhang, Zhao Zhang, Benyan Xu, Man Zhang, Yunchuan Zeng, Qian Liu, Mingda Lv
Summary: The extensively developed Early Cretaceous intermediate-felsic rocks in the northern North China Craton provide valuable insights into the nature of Paleo-Pacific subduction and associated geodynamic processes. Geochemical and geochronological analyses of trachyandesites and rhyolites from the eastern Hebei, northern NCC suggest that the trachyandesites likely originated from enriched mafic lower crust and the rhyolites are derived from the trachyandesitic magmas through fractional crystallization. The migration direction change of these rocks is believed to be primarily attributed to slab rollback of the subducting Paleo-Pacific Plate.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Wei Liu, Ping Gao, Xianming Xiao, Yanming Zhao, Yijie Xing, Jinku Li
Summary: The organic-rich shales of the Shuijingtuo Formation in China are an important target for shale gas exploration. The upper section of the formation, primarily consisting of limestone, silty shale, and black shale, has been rarely studied but recently showed promising results for shale gas exploration. Geochemical investigations of the upper section shale deposits revealed that the organic matter enrichment mechanism underwent dynamic changes due to relative sea-level changes and episodic upwelling activities.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xin Wang, Chen Zhang, Zixin Xue, Qianyou Wang, Zhenxue Jiang, Kun Zhang, Xiangye Kong
Summary: This study analyzed the heterogeneity of gas compositions and the effects of magmatism on gas accumulation in shale gas exploration in the Yangtze plate. The results showed that magmatism caused the development of micro-fractures in shale reservoirs and accelerated the thermal evolution rate of organic matter. The impact of magmatism on shale gas accumulation varied in different regions, either favoring or compromising efficient gas accumulation in shale reservoirs.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
