Journal of Asian Earth Sciences最新文献

{"title":"Skarn-related sphalerite: Indium enrichment and key controlling factors","authors":"Junyi Wang ,&nbsp;Guotao Sun ,&nbsp;Jia-Xi Zhou ,&nbsp;Hui Chen ,&nbsp;Bing Yu ,&nbsp;Kai Luo ,&nbsp;Shiyu Liu ,&nbsp;Ruiliang Wang","doi":"10.1016/j.jseaes.2025.106894","DOIUrl":"10.1016/j.jseaes.2025.106894","url":null,"abstract":"<div><div>Indium is a critical metal that can be concentrated in skarn deposits. However, not all skarn deposits exhibit indium mineralization. The controlling factors of indium mineralization in skarn deposits are unclear. We investigate the sphalerite trace element, geological setting, geochemical compositions of related intrusions, and hydrothermal physicochemical conditions of 47 skarn deposits worldwide to unravel the critical factors for indium mineralization. The deposits are classified into four types according to the indium content in sphalerite. The In-rich skarn deposits are predominantly distributed in the intra-continental extension setting. The In-rich skarn deposits show higher SiO₂ values and Rb/δEu ratios, and lower MgO contents than the In-poor deposits, indicating that the evolution process evaluates the indium enrichment in magma. The Sr-Nd-Hf isotopes suggest that In-rich skarns are almost or partly derived from the partial melting of metasedimentary rocks; however, In-poor deposits are dominantly derived from the melting of the mafic lower crust. The similar hydrothermal temperatures (200 to 300 °C), salinities (4 to 12 NaCl wt%), and δ³⁴S (–5 to 10 ‰) between In-rich and In-poor deposits imply that the indium contents in sphalerite may be irrelevant to these conditions. The In and Cu contents define a solubility limit (<em>C</em>_In=<em>C</em>_Cu), indicating that the Cu activity controls the maximum indium contents in sphalerite. The study highlights that the skarn-related indium mineralization is a coupled consequence of the magma sources, evolution, and hydrothermal Cu activity.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"297 ","pages":"Article 106894"},"PeriodicalIF":2.4,"publicationDate":"2025-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694600","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}

{"title":"Dolomitization mechanism for thick bedded dolostones of the Ordovician Majiagou Formation (Member 5) in the eastern Ordos Basin, China","authors":"Zhenmeng Sun,&nbsp;Xiangjie Cui,&nbsp;Huan Liu,&nbsp;Jian Cao,&nbsp;Xiancai Lu","doi":"10.1016/j.jseaes.2025.106889","DOIUrl":"10.1016/j.jseaes.2025.106889","url":null,"abstract":"<div><div>The genesis of thick bedded dolostones is considered closely related to the “Dolomite Problem”. This study investigates the mineralogical, sedimentological, and geochemical characteristics of thick bedded dolostones of the Ordovician Majiagou Formation (Member 5) in the eastern Ordos Basin, China. These dolostones consist of stacked meter to submeter scale thin bedded cycles, characterized by three key facies: cryptocrystalline dolostone with spherical gypsum molds, microcrystalline dolostone with nonplanar crystal boundaries and lath shaped gypsum pseudomorphs, and fine crystalline dolostone with planar boundaries lacking gypsum. The vertical distribution of these facies correlates with sea level cyclicity and geochemical variations in dolomite stoichiometry, indicating that dolomitization was controlled by high frequency sea level oscillations. The preservation of horizontal gypsum pseudomorphs, together with diagnostic Th/U ratios and bell-shaped REE patterns, supports a low energy, restricted cratonic setting. We apply a syndepositional model wherein evaporative concentration in a warm, shallow greenhouse sea led to calcite and gypsum precipitation, elevating the Mg/Ca ratio and triggering dolomitization. The resulting dense brine percolated downward, replacing unconsolidated calcareous precursors to form the observed dolostone types. This case demonstrates that high frequency sea level oscillations and their resultant thin bedded cycle stacking can constitute an efficient formation mechanism for thick bedded dolostones in cratonic basins.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"297 ","pages":"Article 106889"},"PeriodicalIF":2.4,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694598","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}

{"title":"Different types of lobes and autogenous circulation phenomena in alluvial fans based on flume simulation experiments: A case study of the Baiyanghe alluvial fan in China","authors":"Fukang Ma,&nbsp;Ye Tao","doi":"10.1016/j.jseaes.2025.106880","DOIUrl":"10.1016/j.jseaes.2025.106880","url":null,"abstract":"<div><div>Although extensive research has been done on alluvial fans, the quantitative relationships between lobe-scale characteristics and internal spatial structures within alluvial fans remain unclear. This study adopt the Baiyang River alluvial fan in China as basic conceptual model and use a flume to simulate to quantitatively analyze differences in lobe types and autogenic cycles in stable period of benchmark. The study reveals that: (1) Based on differences in sedimentary processes, geometric scale, and internal superposition styles, the lobes can be classified into four types: A, B, C, and D, with lobe D exhibiting the highest number; (2) The internal superposition styles of the different lobe types vary significantly, the internal sand body superposition styles of the four lobe types A, B, C, and D are respectively progradation, regression, aggradation, and lateral accumulation; (3) The study introduces four indicators to measure the internal superposition of the sand bodies, analyzing the scale characteristics of the lobes, including dimensionless length, width, area, and distribution angle. The dimensionless length, width, area, and distribution angle of lobes A and D are relatively large, while those of lobes C and B are comparatively smaller. (4) The evolution of alluvial fans involves autogenetic cycles process corresponding to different types of lobe evolution, namely: channel incision, lobe proaccretion (lobe A), lobe lateral migration (lobe D), lobe aggradation (lobe C), lobe retrograde regression (lobe B), and channel incision again. The four lobe types reflect dynamic changes in the sedimentary characteristics and environment of the alluvial fan at various developmental stages. This research will provide a scientific basis for the prediction of alluvial fan oil and gas reservoirs in similar regions in northwest China, and also contribute to the in-depth study of the sedimentary dynamics of alluvial fans and the coupling mechanism of the “source-sink” system under stable base level conditions.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"296 ","pages":"Article 106880"},"PeriodicalIF":2.4,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145618540","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}

{"title":"Middle Jurassic to Late Cretaceous tectonic evolution of the southern Lhasa Block, Tibet, China: Constraints from anisotropy of magnetic susceptibility (AMS) of the Linzhou Baisn","authors":"Qinglong Chen ,&nbsp;Xin Cheng ,&nbsp;Nan Jiang ,&nbsp;Bitian Wei ,&nbsp;Dongmeng Zhang ,&nbsp;Longyun Xing ,&nbsp;Yanan Zhou ,&nbsp;Teng Li ,&nbsp;Ruiyang Chai ,&nbsp;Hanning Wu","doi":"10.1016/j.jseaes.2025.106881","DOIUrl":"10.1016/j.jseaes.2025.106881","url":null,"abstract":"<div><div>The Jurassic-Cretaceous closure dynamics of the Bangong-Nujiang Tethyan Ocean provide pivotal constraints on the Tibetan Plateau’s collisional orogeny and crustal thickening. To rigorously constrain the subduction and closure processes of the Bangong-Nujiang Tethyan Ocean during the Jurassic-Cretaceous, this study employs systematic anisotropy of magnetic susceptibility (AMS) analysis. By investigating the relationship between the maximum principal compressive stress direction (inferred from magnetic of susceptibility ellipsoids) and the subduction dynamics of the Bangong-Nujiang Tethyan, we establish new structural deformation insights from the continuous Middle Jurassic-Late Cretaceous sedimentary sequences in the Linzhou Basin of the Lhasa Block. These findings provide critical constraints on the Jurassic-Cretaceous subduction evolution of the Bangong-Nujiang Tethyan Ocean. The Linzhou Basin, spanning from the Middle Jurassic Yeba Fm. to the Late Cretaceous Shexing Fm., experienced dual subduction dynamics: southward subduction of the Bangong-Nujiang Tethyan Ocean and northward subduction of the Yarlung-Zangbo Neo-Tethys Ocean. Crucially, the AMS data reveal that underlying strata preserved their primary deformation signatures without being overprinted by younger tectonic events. This implies that the AMS record faithfully reflects the contemporaneous tectonic stress field during the deposition and early deformation of each stratigraphic horizon. During the Middle-Late Jurassic, the Shiquanhe-Namco Ocean remained an open oceanic domain until its eventual closure in the Early Cretaceous. Consequently, the southward compressional stress regime documented in the Linzhou Basin during this interval likely reflects a composite tectonic signature, originating from the dual south subduction systems of both the Bangong-Nujiang Tethys Ocean and the Shiquanhe-Namco Ocean. Until the Early Cretaceous Takena Fm., the southward compression experienced by the Linzhou Basin was only related to the southward subduction of the Bangong- Nujiang Tethys Ocean. The Bangong-Nujiang Tethyan Ocean did not close during the Late Cretaceous Shexing Fm., but the subduction intensity was significantly reduced compared to the Early Cretaceous Takena Fm., indicating that the Bangong-Nujiang Tethyan Ocean tended to close.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"296 ","pages":"Article 106881"},"PeriodicalIF":2.4,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145685357","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}

{"title":"Geochemistry and origin of geofluids from the Muji carbonic springs in the northeastern Pamir Plateau, NW China: Implications for regional fault activities","authors":"Li Zhang ,&nbsp;Xiangxian Ma ,&nbsp;Yuanyuan Shao ,&nbsp;Jianzhen Chen ,&nbsp;Zhongping Li ,&nbsp;Lijuan Zhang ,&nbsp;Chunhui Cao ,&nbsp;Georgy Chelnokov ,&nbsp;Vasilii Lavrushin ,&nbsp;Guodong Zheng","doi":"10.1016/j.jseaes.2025.106882","DOIUrl":"10.1016/j.jseaes.2025.106882","url":null,"abstract":"<div><div>The Muji carbonic springs are typical tectonically controlled springs. To understand the origin and circulation process of geofluids from these springs, twenty-eight water samples and fourteen gas samples were collected and analyzed for their chemical and isotopic compositions. The hydrochemical type of these springs is classified as the Ca-HCO₃ type, primarily due to the dissolution of carbonate minerals. These waters have δD values ranging from −106.8 ‰ to −89.6 ‰ and δ¹⁸O values from −15.1 ‰ to −12.6 ‰, indicating that their primary origin is meteoric precipitation at different altitudes. The waters infiltrated through the fault zones to depths of 5.0±0.7 km, and mixed with deep fluids as well as shallow groundwater before being discharged at the surface. Gases from these springs have δ¹³C_CO2 values ranging from −5.8 ‰ to −2.9 ‰ and their ³He/⁴He ratios are 0.08 to 0.12 times the atmospheric value (³He/⁴He = 1.39 × 10⁻⁶), suggesting that the CO₂ was primarily derived from metamorphic carbonate rocks with minor contributions from mantle CO₂ (approximately 3% ∼ 6%) based on the He-CO₂ ternary mixing model calculation. The junction sites of faults in different directions show the strongest gas emission with relatively high δ¹³C_CH4 and δ¹³C_CO2 values, and higher CO₂ content, indicating direct connectivity with underlying fluid reservoirs. Therefore, these geofluids primarily migrate through deep fault systems within the thickened crust. Relatively high stress at fault intersections enhances fluid conductivity, promoting fluid migration upward and thus the potential formation of carbonic springs. These findings offer valuable insights into regional fault activity and crust-fluid interactions.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"297 ","pages":"Article 106882"},"PeriodicalIF":2.4,"publicationDate":"2025-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749807","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}

{"title":"Thermal histories of Cenozoic southern Marmara granitoids from emplacement to exhumation: Implications for tectono-thermal evolution of NW Anatolia (Türkiye)","authors":"Şafak Altunkaynak ,&nbsp;Alp Ünal ,&nbsp;Ömer Kamacı ,&nbsp;Işıl Nur Güraslan ,&nbsp;Gürsel Sunal ,&nbsp;Erdinç Yiğitbaş ,&nbsp;István Dunkl ,&nbsp;Margaret Forster","doi":"10.1016/j.jseaes.2025.106879","DOIUrl":"10.1016/j.jseaes.2025.106879","url":null,"abstract":"<div><div>We investigated the thermal history of the southern Marmara granitoids (Northern Kapıdağ, Southern Kapıdağ and Avşa Plutons), from the crystallization cooling to exhumation cooling, by using multiple geo-thermochronology methods that included zircon U-Pb, biotite ⁴⁰Ar/³⁹Ar, apatite and zircon (U-Th)/He dating as well as geothermobarometry calculations. The geothermobarometry calculations and zircon U-Pb dating indicate that they were emplaced into mid-crustal levels (13.5 to 8.8 km) during the middle to late Eocene (48–37 Ma). The integrated multiple geo-thermochronological dataset yields similar t-T paths for each pluton, which were divided into three distinct intervals: Interval I: high to mid temperatures (800–350 °C), Interval II: mid to mid-low temperatures (350–180 °C), and Interval III: mid-low to low temperatures (180–60 °C). Interval I is characterized by steep t-T paths showing that the plutons reached mid-temperature levels by rapid cooling during the middle to late Eocene (48–35 Ma). Interval II, on the other hand, is distinguished by skewed t-T paths along the mid- to low temperatures, implying a deceleration in the cooling rates. Finally, in Interval III, the t-T paths steepen again, indicating rapid exhumation in the early Oligocene (32–28 Ma). We infer that the Eocene rapid cooling was most likely induced by bottom-up extension (slab break-off or convective removal of the lithosphere) while the early Oligocene rapid exhumation of NW Anatolia was triggered by the back-arc extension resulting from the rollback of the subducting African slab along the Hellenic trench system, which has migrated southward in time.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"296 ","pages":"Article 106879"},"PeriodicalIF":2.4,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145685356","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}

{"title":"Real-time prediction of peak ground acceleration for on-site earthquake early warning in China via Interpretable deep learning","authors":"Hao Fu ,&nbsp;Zaixian Chen ,&nbsp;Qiang Ma","doi":"10.1016/j.jseaes.2025.106877","DOIUrl":"10.1016/j.jseaes.2025.106877","url":null,"abstract":"<div><div>A Transformer-PGA network was developed for real-time peak ground acceleration (PGA) prediction of on-site earthquake early warning in China. It was designed to reduce magnitude saturation and to correct the underestimation of strong ground motion in current on-site earthquake early warning methods. A dataset of 6181 three-component ground motion records in China was used. Twenty-eight ground motion parameters were extracted from 0.5 to 50 s after P-wave arrival to train the model. Arias intensity, the average of the top ten peak velocities, and P-wave acceleration were identified as the dominant parameters. Arias’ intensity had an average sensitivity index of about 0.4. Three sub-models were derived with 12, 6, and 3 optimized input parameters. The Transformer-PGA model had a STD of 0.569 at 3 s, outperforming the <em>P</em>_d model (0.743) in reducing PGA underestimation. The sub-models retained over 97 % of the full model’s explained variance as measured by R². Compared with the LSTM model, the Transformer-PGA model showed higher prediction accuracy and produced earlier warnings. Typical warning times were 3 s for Transformer-PGA and 5 s for the LSTM model. For operational use, a dual threshold warning scheme is proposed. An initial alert is issued at 3 s to balance timeliness and accuracy. A refined report is issued at 10 s. In extreme cases, 1 s alerts are provided for emergency response. By combining a Transformer architecture with sensitivity-driven parameter optimization, improvements were made in accuracy, timeliness, and interpretability of real-time PGA prediction for earthquake early warning in China.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"297 ","pages":"Article 106877"},"PeriodicalIF":2.4,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694520","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}

{"title":"Early Jurassic didactyl tracks and the related dinosaur ichnofauna in the southern Yangtze Block, Guizhou, SW China","authors":"Lida Xing ,&nbsp;Qiyan Chen ,&nbsp;Hendrik Klein ,&nbsp;W. Scott Persons IV ,&nbsp;Donghao Wang ,&nbsp;Qi Qi","doi":"10.1016/j.jseaes.2025.106874","DOIUrl":"10.1016/j.jseaes.2025.106874","url":null,"abstract":"<div><div>The Sichuan-Yunnan Basin in southwestern China represents a region of global significance for Early- to Mid-Jurassic tetrapod fossils. The area is home to a renowned assemblage of saurischian body fossils in the Lufeng and Shaximiao formations, and also has rich track records that, compared with the former, are broader in spatial and chronological scope. Of these, the upper Lower Jurassic Ma’anshan Member of the Ziliujing Formation contains the most abundant and diverse track records in Guizhou Province. This paper presents the discovery of dinosaur tracks from the Wucha sites, including those belonging to cf. <em>Parabrontopodus</em>, cf. <em>Liujianpus</em>, <em>Anomoepus</em> isp., and <em>Grallator</em>. Unusual are didactyl tracks, which exhibit some affinities to Cretaceous deinonychosaurians, based solely on their morphology. But detailed analysis suggests that they are possible punting or running traces produced by non-didactyl trackmakers. Furthermore, the stratigraphic age of the Wucha didactyl tracks is much older if compared to the lower temporal range of Deinonychosauria.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"296 ","pages":"Article 106874"},"PeriodicalIF":2.4,"publicationDate":"2025-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145594746","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}

{"title":"Cenozoic extension mechanism of the Weihe Graben, central China: constraints from analog modeling","authors":"Liuqing Jiang ,&nbsp;Wei Li ,&nbsp;Biao Peng ,&nbsp;Haitao Jin ,&nbsp;Le Zhang ,&nbsp;Zhenwei Feng","doi":"10.1016/j.jseaes.2025.106875","DOIUrl":"10.1016/j.jseaes.2025.106875","url":null,"abstract":"<div><div>The Weihe Graben, a Cenozoic rift system at the Ordos-Qinling tectonic boundary in East Asia, provides critical insights into intracontinental extension mechanisms, with debate continuing among three models: simple shear via detachment faulting, pure shear through distributed crustal thinning, and a hybrid early pure/late simple shear transition. To resolve this, we conducted 11 scaled analog experiments simulating end-member pure shear (basal stretching) and simple shear (detachment-driven) regimes, testing variables such as extension rate, extension direction, basement heterogeneity, and synkinematic sedimentation. Pure shear systems develop basins bounded by pre-existing basement structures (unaffected by listric faults), with homogeneous basements generating domino/conjugate faults and heterogeneous basements forming graben-horst-graben systems. Oblique extension induces en echelon depressions, and a slower extension rate corresponds to reduced subsidence thickness. In contrast, simple shear systems exhibit three kinematic domains: (i) rolling anticlines, (ii) secondary grabens, and (iii) horizontal translation zones, with basin architecture insensitive to basement variations or extension direction. Synkinematic sedimentation and the sand-to-mud ratio moderately enhanced basin evolution. Comparing natural structures indicates that the half-graben structures in the Weihe Graben were controlled by listric faults, and the en echelon distribution of the Xi’an and Gushi depressions resulted from oblique extension under a pure shear mechanism. Controlled by oblique extension, en echelon faults developed along its northern margin, accompanied by two en echelon depressions. Influenced by the relatively cold and rigid basement, these depressions are distributed around the Lishan area, where listric faults are well-developed. A decreased extension rate further enhanced the localization.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"296 ","pages":"Article 106875"},"PeriodicalIF":2.4,"publicationDate":"2025-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145685358","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}

{"title":"High-Resolution LiDAR-based fault scarp identification and rupture zone analysis: a case study of the Laohushan Fault, northern Tibetan Plateau, China","authors":"Ziyang Zhang,&nbsp;Tao Chen,&nbsp;Aixia Dou,&nbsp;Peng Liang","doi":"10.1016/j.jseaes.2025.106872","DOIUrl":"10.1016/j.jseaes.2025.106872","url":null,"abstract":"<div><div>Fault scarps are key tectonic landforms for studying paleoearthquake events. This study utilized high − resolution LiDAR data and the curvature template matching algorithm to analyze fault scarps and surface rupture zones along the western Laohushan Fault, northern Tibetan Plateau. Optimized through binary classification and evaluation metrics (accuracy, ROC curves, Cohen’s Kappa), the method identified a 500 m template window size and a median Signal-to-Noise Ratio (SNR) threshold of 46 dB as optimal for distinguishing tectonic features. A rupture zone width of 150 m yielded the highest Area Under the Curve (AUC) and Cohen’s Kappa values, validated by field surveys and seismic array reflections. Challenges included false positives from complex topography and human modifications (e.g., river terraces, roads). This work demonstrated the potential of LiDAR and automated algorithms for fault scarp detection, enhancing seismic hazard assessment and fault zone mapping. Future research should focus on adaptive thresholding, advanced scarp degradation models, and multimodal data integration. The findings provided critical insights into the geometry and activity of the Laohushan Fault, supporting seismic risk mitigation and infrastructure planning in this region.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"297 ","pages":"Article 106872"},"PeriodicalIF":2.4,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749808","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}