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Petrogenesis of post-collisional felsic rocks and implications for continental growth: Insights from a Paleogene monzonitic intrusion, southeastern Tibetan Plateau
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-17 DOI: 10.1016/j.jseaes.2025.106528
Hao Liu , Zheng Liu , Guo-Chang Wang , Shu-Cheng Tan
{"title":"Petrogenesis of post-collisional felsic rocks and implications for continental growth: Insights from a Paleogene monzonitic intrusion, southeastern Tibetan Plateau","authors":"Hao Liu ,&nbsp;Zheng Liu ,&nbsp;Guo-Chang Wang ,&nbsp;Shu-Cheng Tan","doi":"10.1016/j.jseaes.2025.106528","DOIUrl":"10.1016/j.jseaes.2025.106528","url":null,"abstract":"<div><div>It is unclear if substantial continental growth occurs after continent–continent collision. Paleogene magmatism immediately after the India–Asia collision produced widespread felsic intrusions in the southeastern Tibetan Plateau (TP) and<!--> <!-->these intrusions provide an excellent opportunity to study continental growth in a post-collisional setting. In this paper, we report new petrological and geochemical data for a representative intrusion, the Paleogene Weishan monzonitic intrusion in the Simao Block of the southeastern Tibetan Plateau. The quartz monzonite porphyries in the Weishan intrusion are geochemically similar to adakitic rocks. They have enriched Sr–Nd isotopic compositions, with (<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub> ratios of 0.7071–0.7072 and Ɛ<sub>Nd</sub>(t) values from −4.0 to −3.5. These features are indicative of an origin of these rocks from melts that were produced by the interaction between melts derived from delaminated lower crust and overlying mantle peridotite. The geochemical similarities between the Weishan intrusion and coeval felsic rocks in the southeastern TP suggest a common origin. Detailed quantitative modeling demonstrates that only a small amount of mantle component (less than 20 %) was involved in the formation of these rocks, and at the same time, a large volume of the lower crust (with a thickness of roughly 10 km) was recycled into mantle by delamination. Therefore, we suggest that substantial continental growth might not have occurred in the southeastern TP region during the Paleogene after continent–continent collision.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"282 ","pages":"Article 106528"},"PeriodicalIF":2.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Late Cretaceous and Cenozoic denudation of northern Central Vietnam examined through apatite fission track analysis
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-15 DOI: 10.1016/j.jseaes.2025.106524
Michael B.W. Fyhn , Paul Green , Bui H. Hoang , Jussi Hovikoski , Tran V. Tri , Vung V. Phach , Tonny B. Thomsen , Henrik I. Petersen , Mai H. Dam , Jørgen A. Bojesen-Koefoed , Ioannis Abatzis , Lars H. Nielsen , Christian Heine
{"title":"Late Cretaceous and Cenozoic denudation of northern Central Vietnam examined through apatite fission track analysis","authors":"Michael B.W. Fyhn ,&nbsp;Paul Green ,&nbsp;Bui H. Hoang ,&nbsp;Jussi Hovikoski ,&nbsp;Tran V. Tri ,&nbsp;Vung V. Phach ,&nbsp;Tonny B. Thomsen ,&nbsp;Henrik I. Petersen ,&nbsp;Mai H. Dam ,&nbsp;Jørgen A. Bojesen-Koefoed ,&nbsp;Ioannis Abatzis ,&nbsp;Lars H. Nielsen ,&nbsp;Christian Heine","doi":"10.1016/j.jseaes.2025.106524","DOIUrl":"10.1016/j.jseaes.2025.106524","url":null,"abstract":"<div><div>Tectonism is associated with uplift and exhumation but are commonly difficult to decipher due to large gaps in the stratigraphic record. Northern Central Vietnam has a highly dynamic exhumation and tectonic history affected by Middle Paleozoic and latest Permian to Triassic orogenies but also less known younger events. We explore this history through analysis of apatite fission tracks (AFT) together with stratigraphy and vitrinite reflectance, seismic data and new U/Pb zircon-ages. Late Cretaceous and Paleocene uplift and exhumation are here attributed to a poorly understood orogenic event. It was followed by mid- to Late Cenozoic doming and rift pulses and intervening periods of subsidence and basin development associated with regional SE Asian tectonism and establishment of South China Sea basins.</div><div>We document the evolution of NW-striking structural lineaments in northern Central Vietnam and their repeated reactivation. The complex Central Vietnamese fault block mosaic formed since the Paleozoic during different tectonic events associated with movements over these structural lineaments. Fault blocks were exhumed during Late Cretaceous and Cenozoic uplift phases, recorded by AFT in four discrete thermotectonic episodes around 82–70, 61–59, 43–42, and 19–15 Ma. The NW-striking crustal lineaments controlled deformation and uplift during Middle Paleozoic, latest Permian to Triassic and Late Cretaceous to Early Cenozoic orogenies. While the two former orogenies are well-known, the latter is poorly realized despite its super-regional nature across Indochina and SE China. It may relate to plate collision and the cessation of Paleo-Pacific subduction underneath SE Asia. Between the orogenic episodes, rifting reactivated the NW-striking crustal lineaments in the Carboniferous-Permian, Late Triassic and mid-Cenozoic causing basin development in Central Vietnam and neighboring areas. The mid-Cenozoic event led to the opening of the Hue Sub-basin at the Gulf of Tonkin margin. Uplift and one to one-and-a-half kilometer post-rift erosion sourced sediments to this sub-basin, including Upper Miocene petroleum reservoir sands.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"282 ","pages":"Article 106524"},"PeriodicalIF":2.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Provenance of Silurian sandstones in the South Kunlun terrane, West Kunlun (NW China) and the timing of the closure of the early Paleozoic Kudi-Qimanyute Ocean
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-09 DOI: 10.1016/j.jseaes.2025.106527
Jie Zhang , Yajun Xu , Yiming Zhang , Huxiang Yang , Zihao Huang , Kai Cao , Xuguang Sha , Xin Li , Guocan Wang
{"title":"Provenance of Silurian sandstones in the South Kunlun terrane, West Kunlun (NW China) and the timing of the closure of the early Paleozoic Kudi-Qimanyute Ocean","authors":"Jie Zhang ,&nbsp;Yajun Xu ,&nbsp;Yiming Zhang ,&nbsp;Huxiang Yang ,&nbsp;Zihao Huang ,&nbsp;Kai Cao ,&nbsp;Xuguang Sha ,&nbsp;Xin Li ,&nbsp;Guocan Wang","doi":"10.1016/j.jseaes.2025.106527","DOIUrl":"10.1016/j.jseaes.2025.106527","url":null,"abstract":"<div><div>The West Kunlun Orogenic Belt (WKOB) records the early Palaeozoic subduction and accretion events related to the Proto-Tethys Ocean along the southwestern margin of the Tarim Block. The branch of the Proto-Tethys Ocean in the West Kunlun region is known as the Kudi-Qimanyute Ocean, whose consumption and closure have resulted in the collision between the North Kunlun terrane (NKT) and the South Kunlun terrane (SKT). However, the age and process of ocean closure have been widely debated. In this study, we present new U-Pb ages and Hf isotope data of detrital zircon and monazite from the Silurian sandstones at the northern margin of the SKT, which reveals a significant shift of sedimentary provenance, indicative of the transition in tectonic setting from a continental forearc to a collisional foreland basin. Provenance analysis indicates that detrital zircon age spectrum from the lower part of the sampled section shows an unimodal pattern and is dominated by early Paleozoic zircon grains derived from the SKT and the Tianshuihai Terrane (TSHT) magmatic arcs. In contrast, the ages of detrital zircons from the sample in the middle part of the section range from Neoproterozoic to Archean with prominent peaks at around 1.1 Ga, 1.4 Ga, and 1.6–1.8 Ga, which are interpreted to be recycled from older (meta)sedimentary rocks in the SKT and TSHT. This change reflects the burial of the magmatic arc beneath a prograding wedge of detritus, sourced from the advancing TSHT and SKT, as a result of the continental collision. Based on the depositional age of the Qaite Formation constrained by the youngest detrital monazite, as well as post-orogenic magmatism and sedimentary records in the region, the closure of the Kudi-Qimanyute Ocean can be constrained to the middle-late Silurian period (427–420 Ma). The detritus in the upper part of the section consists of varying amounts of early Paleozoic and Precambrian grains. The reappearance of late Neoproterozoic to early Paleozoic components is attributed to the re-exposure of the early arc rocks in the SKT and the TSHT during the collisional process. The abundant Archean to Mesoproterozoic detritus in the studied samples reflects the age and composition of the Precambrian basement of the SKT and TSHT. A comprehensive comparison of Precambrian detrital zircon U-Pb and Hf isotopic data indicates that SKT and TSHT share a basement affinity with Western Laurentia, suggesting they were likely part of Western Laurentia within the Rodinian supercontinent.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106527"},"PeriodicalIF":2.7,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detachment fault system in the Zedang ophiolite of southern Tibet: New insights into the evolution of the neo-Tethys ocean
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-08 DOI: 10.1016/j.jseaes.2025.106525
Yuan Li , Ruibao Li , Chengjun Liu , Jian Zhang , Duoji Ciren , Xiao Zhou , Zhenkai He , Jingsui Yang
{"title":"Detachment fault system in the Zedang ophiolite of southern Tibet: New insights into the evolution of the neo-Tethys ocean","authors":"Yuan Li ,&nbsp;Ruibao Li ,&nbsp;Chengjun Liu ,&nbsp;Jian Zhang ,&nbsp;Duoji Ciren ,&nbsp;Xiao Zhou ,&nbsp;Zhenkai He ,&nbsp;Jingsui Yang","doi":"10.1016/j.jseaes.2025.106525","DOIUrl":"10.1016/j.jseaes.2025.106525","url":null,"abstract":"<div><div>The Zedang ophiolite in the Yarlung Zangbo Suture Zone of southern Tibet provides crucial insights into the tectonic evolution of the Neo-Tethys Ocean. This study presents the first detailed characterization of a detachment fault system within the ophiolite, which primarily occurs along the southern boundary of peridotite massifs. The system is marked by serpentinite shear zones at the top of the mantle peridotite, forming a tectonic contact between the peridotite massifs and the overlying Bainang terrane. The structural, lithological, and deformation characteristics of the shear zone closely resemble those observed in oceanic core complexes at modern slow-spreading ridges and in Alpine ophiolites. Zircon U-Pb dating of an undeformed gabbro dike intruding the serpentinized peridotite (125.0 ± 0.4 Ma) and a basalt flow directly overlying the detachment fault (124.2 ± 1.0 Ma) indicates that Early Cretaceous magmatic activity occurred following the primary deformation and exhumation stage. Comparative analysis with the Xigaze ophiolite reveals heterogeneous development along the Neo-Tethys ridge system. While the Xigaze ophiolite formed at a slow- or ultraslow-spreading ridge with a more abundant magma supply, the Zedang ophiolite likely originated in a magma-deficient environment characterized by pronounced tectonic extension and episodic magmatism. These findings provide new constraints on the geodynamic processes that shaped the Neo-Tethys Ocean prior to the India–Asia collision.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"283 ","pages":"Article 106525"},"PeriodicalIF":2.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of pore structure before and after solvent extraction: A case study of lacustrine shales in the Triassic Chang 7 Formation, Ordos Basin, Northern China
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-08 DOI: 10.1016/j.jseaes.2025.106526
Guanping Wang , Zhijun Jin , Qian Zhang , Rukai Zhu , Ruyue Wang , Xianyang Liu , Shixiang Li , Tianjia Liu , Xiaoyu Du , Kouqi Liu
{"title":"Characterization of pore structure before and after solvent extraction: A case study of lacustrine shales in the Triassic Chang 7 Formation, Ordos Basin, Northern China","authors":"Guanping Wang ,&nbsp;Zhijun Jin ,&nbsp;Qian Zhang ,&nbsp;Rukai Zhu ,&nbsp;Ruyue Wang ,&nbsp;Xianyang Liu ,&nbsp;Shixiang Li ,&nbsp;Tianjia Liu ,&nbsp;Xiaoyu Du ,&nbsp;Kouqi Liu","doi":"10.1016/j.jseaes.2025.106526","DOIUrl":"10.1016/j.jseaes.2025.106526","url":null,"abstract":"<div><div>The presence of hydrocarbons/bitumen in shales makes accurate characterization of reservoir properties challenging. Solvent extraction helps reveal the true pore structures and assess the movable oil distributions in early mature lacustrine shale oil reservoirs. In the present study, total organic carbon, optical microscopy, Rock-Eval pyrolysis, X-ray diffraction, scanning electron microscope, gas adsorption, and high-pressure mercury injection pressure experiments were performed to investigate the petrographic, geochemical and petrophysical characteristics of extracted and nonextracted shale samples that were collected from the Triassic Chang 7 Member in the Ordos Basin, China. The results revealed that changes in the micro-, meso-, and macropore volumes; specific surface area; average pore diameters and porosities of the shales significantly differ after solvent extraction compared with their original states, which indicates that the pore structures of early-mature, organic-rich shales are largely concealed by the retained oil and residual bitumen. Solvent extraction generally increases porosity by removing extractable organic matter (EOM), which occupies a sizeable pore space. Solvent extraction may, however, also be affected by several factors, resulting in reduced porosity. The main factors influencing the solvent extraction process are the removal of EOM, solvent–kerogen interactions, clay swelling, and the coupling effects of the sedimentary structure and pore system. In addition, the use of changes in porosity to indicate the movable oil content in shales is more meaningful than the changes in S<sub>1</sub> and total pore volume are. This study is beneficial for the accurate characterization of shale pore structures and precise assessments of the movable oil contents of lacustrine shales.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"282 ","pages":"Article 106526"},"PeriodicalIF":2.7,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical simulation of pre-seismic and coseismic continuous response of water level to the 2014 Ludian MS6.5 earthquake: A case study of Huize well
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-05 DOI: 10.1016/j.jseaes.2025.106523
Huimin Kong , Hongbiao Gu , Haibin Wei
{"title":"Numerical simulation of pre-seismic and coseismic continuous response of water level to the 2014 Ludian MS6.5 earthquake: A case study of Huize well","authors":"Huimin Kong ,&nbsp;Hongbiao Gu ,&nbsp;Haibin Wei","doi":"10.1016/j.jseaes.2025.106523","DOIUrl":"10.1016/j.jseaes.2025.106523","url":null,"abstract":"<div><div>Groundwater is sensitive to seismic and tectonic activity. Continuous response of well water levels pre-seismic and coseismic provides further evidence for the relationship between seismic activity and changes in water level. However, quantitatively analyzing factors such as crustal stress variations, aquifer deformation, pore pressure changes, and dynamic fluctuations in well water levels from seismogenesis to seismic rupture presents challenges due to their complex nature. Additionally, research on pre-seismic and coseismic response has been separated temporally due to different physical mechanisms and research objectives. In this study, pre-seismic and coseismic response are considered as continuous processes that involve a series of physical phenomena including stress–strain-pore pressure-water level changes before and during an earthquake event. This study aims to establish quantitative relationships between these response processes and hydrogeological parameters, as well as rock mechanical properties, thereby revealing the underlying physical mechanisms governing the continuous pre- and coseismic response of well water levels. A mathematical and numerical model was developed to continuously analyze the pre- and coseismic response of well water levels based on hydraulic-mechanical coupling near fault sections using near-field earthquakes under static stress as a case study. To validate the effectiveness of the numerical model, a simulation was conducted to replicate the continuous pre- and coseismic response of Huize well water levels during the Ludian earthquake. Through the design, identification, and correction of various parameter schemes, the simulated values align closely with measured water levels for both pre- and coseismic periods. This research holds significant practical implications for earthquake monitoring.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106523"},"PeriodicalIF":2.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Petrogenesis of Mesoproterozoic kimberlites in the Chigicherla region, Eastern Dharwar craton, Southern India: Insights into the origin of small-volume, enriched-mantle derived melts and link to subduction and supercontinent cycle
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-05 DOI: 10.1016/j.jseaes.2025.106508
Hero Kalra , Ashish Dongre , Fanus Viljoen , Qiu-Li Li
{"title":"Petrogenesis of Mesoproterozoic kimberlites in the Chigicherla region, Eastern Dharwar craton, Southern India: Insights into the origin of small-volume, enriched-mantle derived melts and link to subduction and supercontinent cycle","authors":"Hero Kalra ,&nbsp;Ashish Dongre ,&nbsp;Fanus Viljoen ,&nbsp;Qiu-Li Li","doi":"10.1016/j.jseaes.2025.106508","DOIUrl":"10.1016/j.jseaes.2025.106508","url":null,"abstract":"<div><div>We present new mineralogical, elemental and U-Pb perovskite age data for diamondiferous intrusions from Chigicherla kimberlite cluster of the Eastern Dharwar craton (EDC) in southern India. These rocks display inequigranular textures and contain macrocrysts, and segregations of solidified melts which are interpreted to be magmaclasts. Mineralogical studies indicate that intrusions CC-1 and CC-2 show a similarity to Kaapvaal lamproites, while the other three intrusions (CC-3, CC-4, and CC-5) display characteristics indicative of true kimberlite nature. The whole rock major and trace element geochemistry, involving large-ion lithophile and high-field strength elements, supports this observation. The geochemical signatures resembling Ocean Island Basalts (OIB) and metasomatism of source regions by fluids/melts emanating from deep-sourced upwelling mantle are consistent across the Chigicherla intrusions, mirroring other kimberlite intrusions within the EDC. Perovskite dating revealed a <sup>206</sup>Pb/<sup>238</sup>U age of 1110 ± 9.5 Ma for the CC-1 pipe and 1116 ± 14 Ma for the CC-3 pipe.</div><div>This new data enables us to study the genesis of the Chigicherla intrusions specifically and to propose a new geodynamic model for the eruption of kimberlites and lamproites in southern India in general. The eruptions of predominantly kimberlites between 1055 and 1153 Ma and lamproites between 1300 and 1400 Ma are attributed to processes such as prolonged subduction, lithospheric extension, and mantle return flow, considering the plate tectonic evolution of the EDC during the Mesoproterozoic.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106508"},"PeriodicalIF":2.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Constraints of clay mineral assemblages on the provenance of sediments in the northern East China Sea with implications for the tectonic activities
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-02 DOI: 10.1016/j.jseaes.2025.106512
Zhigeng Huang , Yonghang Xu , Liang Yi , Dongyi Li , Jian Chen
{"title":"Constraints of clay mineral assemblages on the provenance of sediments in the northern East China Sea with implications for the tectonic activities","authors":"Zhigeng Huang ,&nbsp;Yonghang Xu ,&nbsp;Liang Yi ,&nbsp;Dongyi Li ,&nbsp;Jian Chen","doi":"10.1016/j.jseaes.2025.106512","DOIUrl":"10.1016/j.jseaes.2025.106512","url":null,"abstract":"<div><div>The Zhe-Min Uplift (ZMU) has significantly impacted the geomorphology of eastern China. Due to the geographic barrier created by the ZMU, the transport pathway of sediments from the paleo-Yangtze River to the East China Sea remains unclear. This study presents a high-resolution clay mineralogy analysis of a borehole (ECS-DZ1, 153.6 m) within the ZMU to investigate sediment provenance and paleoenvironmental changes in the northern East China Sea. In the Early Pleistocene, the clay minerals of marine sediments were predominantly illite, with notable contents of smectite (24 %) and kaolinite (12 %), primarily sourced from proximal sources such as the Bailonggang basalt and the Qiantang River. However, with ongoing tectonic subsidence, sediments from the paleo-Yangtze River began to influence the study area during the Early-Middle Pleistocene, leading to a decrease in kaolinite content (6 %). In the terrestrial deposits of core ECS-DZ1, illite is the dominant mineral (68 %), with relatively high kaolinite (12 %) and the absence of smectite, indicating that sediments were primarily derived from the Qiantang River. During the Holocene sea-level highstand, over 50 m of marine sediments accumulated in the Yangtze River estuary, with clay mineral assemblages from this period matching those of the Yangtze River, confirming it as the primary source. The sediment provenance of the East China Sea continental shelf is influenced by the complex interplay of global sea-level fluctuations and tectonic activity.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106512"},"PeriodicalIF":2.7,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microbial characteristics and CO2 diffuse emission in the Mt. Changbai volcanic field, northeast China
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-02 DOI: 10.1016/j.jseaes.2025.106513
Yutao Sun , Xingxing Li , Zhengfu Guo , Wenbin Zhao , Yue Zhang , Peizhan Li , Xiaoyong Zhao , Yaru Li , Bin Hong
{"title":"Microbial characteristics and CO2 diffuse emission in the Mt. Changbai volcanic field, northeast China","authors":"Yutao Sun ,&nbsp;Xingxing Li ,&nbsp;Zhengfu Guo ,&nbsp;Wenbin Zhao ,&nbsp;Yue Zhang ,&nbsp;Peizhan Li ,&nbsp;Xiaoyong Zhao ,&nbsp;Yaru Li ,&nbsp;Bin Hong","doi":"10.1016/j.jseaes.2025.106513","DOIUrl":"10.1016/j.jseaes.2025.106513","url":null,"abstract":"<div><div>Volcanism is one of the principal geologic processes that drive the transferring of carbon between interior and surface reservoirs, playing a crucial role in climate change and global warming. Clarifying the relationship between the characteristics of microorganisms and geological degassing of dormant volcanoes is one of the most important and fundamental tasks. In this study, the microbial characteristics (including bacteria, archaea, and fungi) of cold and hot springs and soil in the Tianchi volcano (TCV), northeastern China were comprehensively studied. Results of this study indicated that the microbial diversities of water environments (hot and cold springs) exhibited distinct characteristics compared to that of the soil, inferring that the microbial-driven carbon cycle in wet and dry degassing systems in the TCV are different. The CO<sub>2</sub> diffuse emission flux from the soil through micro-seepage decreased from the crater to the peripheral area, which broadly coincided with the diversity and richness of the microbial community. A moderate but significant correlation was found between soil CO<sub>2</sub> flux and microbial diversity of bacteria, archaea and fungi, differing from that observed in extreme volcanic environments and non-volcanic fields. This study is the first to report the correlation between microbial community diversity and soil CO<sub>2</sub> flux in a non-extreme volcanic environment. The findings reveal the diversity of microorganisms involved in the carbon cycle, which may provide a foundation for further in-depth exploration of the intrinsic microbial mechanisms in the carbon cycle.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"281 ","pages":"Article 106513"},"PeriodicalIF":2.7,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143358055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Earthquake-induced permeability and hydrochemical variation in an aquifer–aquitard system
IF 2.7 3区 地球科学
Journal of Asian Earth Sciences Pub Date : 2025-02-02 DOI: 10.1016/j.jseaes.2025.106514
Xiaobo Feng, Zhihua Zhou
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