Journal of Asian Earth Sciences最新文献

{"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":"2026-01-01","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":"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":"2026-01-01","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":"Corrigendum to “Indosinian structural geology and tectonics of northern Thailand: A discussion based on new field observation”. [J. Asian Earth Sci. 293 (2025) 1–38/106755]","authors":"M. Rozalli ,&nbsp;C.K. Morley ,&nbsp;N. Mankhemthong","doi":"10.1016/j.jseaes.2025.106876","DOIUrl":"10.1016/j.jseaes.2025.106876","url":null,"abstract":"","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"296 ","pages":"Article 106876"},"PeriodicalIF":2.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145618541","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":"From metamorphic to magmatic fluids: Decoding of Yanshanian Au mineralization process in the Wangu gold deposit, southern China","authors":"Yong-shun Li ,&nbsp;Yong-jun Shao ,&nbsp;Zhong-fa Liu ,&nbsp;Ke Chen ,&nbsp;Xue-ling Dai ,&nbsp;Ming-hui Chen ,&nbsp;Ming-peng He ,&nbsp;Qing Gou","doi":"10.1016/j.jseaes.2025.106847","DOIUrl":"10.1016/j.jseaes.2025.106847","url":null,"abstract":"<div><div>The genetic classification of vein-type gold deposits in large metamorphic terranes, particularly the magmatic–hydrothermal versus metamorphic fluid debate, remains globally contentious. To address this, we investigate the representative Wangu gold deposit in the Jiangnan Orogenic Belt (south China). It features both quartz-vein and altered slate-hosted Au mineralization within Neoproterozoic metasedimentary rocks and exemplifies the disputed genetic models (orogenic, magmatic–hydrothermal, intracontinental reactivation) applied regionally. Fluid inclusion microthermometry defines three paragenetic stages: (1) Pre-gold milky quartz: Th = 298 ℃ (avg), salinity = 4.83 wt% NaCl equiv.; (2) Syn-gold smoky quartz: Th = 244 ℃ (avg), salinity = 5.22 wt% NaCl equiv.; (3) Post-gold quartz-calcite: Th = 198℃ (avg), salinity = 4.53 wt% NaCl equiv. H–O isotopes indicate decreasing δ¹⁸O_fluid (10.69–5.80 ‰) with consistent δD_V-SMOW (−60.85–−60.59 ‰), suggesting that fluid mixing was a critical process during ore formation. Mineralogical analysis identifies three sulfide generations: (1) Py-0 (100–1000 μm) in milky quartz; (2) Py-1/Apy-1 (20–200 μm) in smoky quartz; (3) Py-2/Apy-2 (300–600 μm) in altered slate. All sulfides show diagnostic low Cu/Au (0.03–6.96) and Co/Ni (0.03–4.94) ratios, with paragenetic quartz-sericite associations confirming their hydrothermal origin. The arsenopyrite geothermometer constrains Au mineralization temperatures to 321–356 ℃, with combined fluid inclusion data indicating mineralization depths of 2.4–7.5 km. Hydrothermal apatite U–Pb dating constrains mineralization timing to 149.4 ± 7.3 Ma (milky quartz veins) and 140.9 ± 6.7 Ma (smoky quartz veins), corresponding to Late Jurassic–Early Cretaceous mineralization synchronous with Yanshanian tectonism. This integrated dataset supports a magmatic–hydrothermal origin linked to Paleo-Pacific Plate subduction dynamics. The ore-forming fluids evolved through progressive mixing between deep-sourced magmatic components (δ¹⁸O_fluid = 6.73–11.18 ‰) and shallow metamorphic fluids (δ¹⁸O_fluid = 7.27–12.22 ‰) during ascent along NE-trending fault systems. Metal precipitation was triggered by processes including fluid immiscibility and fluid–rock interaction within structural traps created by “fault-valve” process during multistage slab rollback.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"295 ","pages":"Article 106847"},"PeriodicalIF":2.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145418281","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":"2026-01-01","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":"2026-01-01","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":"Quaternary morphology and geodynamics of the Damodar-Kanshabati interfluve (DKI), India","authors":"Raghunath Pal ,&nbsp;Padmini Pani","doi":"10.1016/j.jseaes.2025.106828","DOIUrl":"10.1016/j.jseaes.2025.106828","url":null,"abstract":"<div><div>The current study uses geo-morphotectonic analysis to understand and interpret the influences of neotectonics in the drainage network of the Damodar-Kanshabati interfluve in the Quaternary Period. The three objectives of this study are: i) identification, mapping and assessment of morphology of the DKI, ii) examination of the role of neotectonic deformations on drainage morpho-dynamics, iii) evaluation of the Quaternary structures and geomorpho-dynamics of the DKI. Topographic sheets, satellite images and field photographs were analysed to fulfill the objectives of the study. Morphometric, morphotectonic and geomorphic parameters had been analysed that reflect neotectonic activities in the interfluve. Identified deformed landforms, tilting, local uplift &amp; subsidence and sudden changes at knick points in longitudinal profiles of all major rivers indicate a strong neotectonic influence in the interfluve. Abrupt changes in channel flow, sudden flow diversion, channel shifting reverse to surface slope and different sinuosity index values exhibit local tectonic deformations. Besides, lineament distribution &amp; density index and earthquake history reflects neotectonic sensitivity of the interfluve. The analysis of morphotectonic parameters exhibit regional as well as local tectonic ambiguity across all physiographic zones. Hypsometric and basin asymmetry analysis based on second order streams and basins indicate small scale tectonic sensitivity across the interfluve. T-index results indicate tectonic deformations and significant neo-tectonism in different pockets. Bouguer gravity anomaly distribution and neotectonics influence zone map show various geomorphological surfaces with different levels of neotectonic activity. The study thus concludes that neotectonic controls have impacted the development of drainage networks in the Damodar-Kanshabati interfluve (DKI).</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"295 ","pages":"Article 106828"},"PeriodicalIF":2.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323918","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":"Growth of thrust-faults in fold-and-thrust belts: an example from the Kelasu structural belt of the Kuqa depression, Tarim Basin, NW China","authors":"Zihan Gao ,&nbsp;Hongwei Yin ,&nbsp;Chao Wu ,&nbsp;Weili Chen ,&nbsp;Jiaqi Zhao ,&nbsp;Wanhui He ,&nbsp;Wei Wang","doi":"10.1016/j.jseaes.2025.106870","DOIUrl":"10.1016/j.jseaes.2025.106870","url":null,"abstract":"<div><div>The growth of thrust-faults provides critical insights into the tectonic evolution and evolution of hydrocarbon traps in fold-and-thrust belts. However, systematic analyses of the displacement profiles of faults in fold-and-thrust belts remain a great challenge because they require abundant seismic data. This study focuses on the sub-salt thrust system in the Kuqa Depression of the Tarim Basin, China, where six main thrust faults are interpreted to analyze the along-strike variations in fault displacement. The results reveal that the displacement profiles of the main thrusts exhibited significant variability in shape, peak values, and maximum displacement to fault length ratio. The growth of the sub-salt faults is controlled by the uplifted basement and the overlying salt. The basement uplift constrained the lateral propagation of the faults, and the paleo-uplift results in strike differences in the structural evolution of the fault system. In addition, large fault displacements are closely linked to thick overlying salt layers, highlighting the mechanical role of salt in facilitating displacement accumulation. These findings provide a better understanding of the growth patterns of thrust faults and their influencing factors.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"295 ","pages":"Article 106870"},"PeriodicalIF":2.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145520824","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":"Evidence of a new backthrust fault system from the 2022 southeast Java, Indonesia earthquake sequence: Insights from seismological analysis","authors":"Andrean V.H. Simanjuntak ,&nbsp;Kadek H. Palgunadi ,&nbsp;Firman Syaifuddin ,&nbsp;Umar Muksin ,&nbsp;Nelly F. Riama ,&nbsp;Anne M.M. Sirait ,&nbsp;Tio A.P. Setiadi ,&nbsp;Dian Kusumawati ,&nbsp;David P. Sahara ,&nbsp;Muhajir Anshori ,&nbsp;Agnis Triahandini ,&nbsp;Wiwit Suryanto ,&nbsp;Brahmeswari Sulandari ,&nbsp;Hanif M. Saleh ,&nbsp;Yusup Iskandar ,&nbsp;Adhatus S. Ahmadiyah ,&nbsp;Dwa Desa Warnana","doi":"10.1016/j.jseaes.2025.106845","DOIUrl":"10.1016/j.jseaes.2025.106845","url":null,"abstract":"<div><div>A Mw 5.2 earthquake struck southeastern Java Island, Indonesia, on July 9, 2022, followed by more than 200 aftershocks over five days, including a Mw 5.0 event. Through integrated analysis combining an updated 1-D velocity model, array-based depth determination, double-difference relocation, and Bayesian moment tensor inversion, we reveal evidence for a previously unidentified active backthrust fault system in the southeastern Java forearc region. The mainshock occurred at approximately 20 km depth, with the relocated hypocenters forming a distinct south-dipping alignment situated 5–20 km above the subducting slab. Focal mechanisms consistently show thrust faulting with east–west strike orientation and steep south-dipping nodal planes—opposite to the subduction direction. This newly identified backthrust system is located approximately 150 km north of the trench line, with estimated fault dimensions of 20 km in length and 30 km in width. Coulomb stress modeling suggests the 1994 Mw 7.8 Banyuwangi earthquake may have contributed to the activation of this structure through a modest stress increase of approximately 1 bar. The identification of this backthrust system enhances our understanding of the complex deformation patterns in southeastern Java, and carries significant implications for regional seismic and tsunami hazard assessment.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"295 ","pages":"Article 106845"},"PeriodicalIF":2.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364929","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":"Ensemble machine learning-driven geostress field inversion in strike-slip fault-controlled reservoirs: A case study of the Fuman Oilfield in Tarim Basin, China","authors":"Yishuai Liu ,&nbsp;Zhenzhong Cai ,&nbsp;Xingliang Deng ,&nbsp;Haitao Zhao ,&nbsp;Jing Li ,&nbsp;Peng Wang ,&nbsp;Mingzhi Li","doi":"10.1016/j.jseaes.2025.106842","DOIUrl":"10.1016/j.jseaes.2025.106842","url":null,"abstract":"<div><div>Accurate inversion of geostress fields is critical for hydrocarbon reservoir exploration and development in the Tarim Basin, yet conventional approaches relying on manual parameter adjustment remain time-consuming and inefficient. This study proposes an ensemble machine learning (ESM) framework integrating in-situ stress testing and numerical simulations. Specifically, the magnitudes of in-situ stress at target wells in the Fuman Oilfield were determined through hydraulic fracturing tests and acoustic emission experiments, while stress orientations were obtained via imaging logging. A three-dimensional multiparameter coupled database containing 200 samples was constructed using MATLAB and finite element method hybrid simulations. The ESM framework implements weighted voting through three machine learning algorithms: Convolutional Neural Network (CNN), Bidirectional Long Short-Term Memory (BiLSTM), and Random Forest (RF), achieving high-precision inversion of stress fields in strike-slip fault zones. The results indicate the following. The ESM model exhibited superior generalization capability (R² = 0.995), outperforming individual CNN, BiLSTM, and RF models by 5.07 %, 1.84 %, and 0.40 %, respectively. The maximum horizontal principal stress orientation in the study area trended NE 45°–50°, with stress perturbations ranging from −12° to 23° observed within fault zones. A strong spatial coupling was identified between stress distribution and fracture linear density (FLD). Four distinct stress concentration patterns were characterized along fault zones: fault crossings/bifurcations, terminations, junctions of two faults, and bends. Fracture development regions were quantitatively classified into four FLD-based categories: high, medium, medium–low, and low. This research provides a technical basis for the target optimization and efficient development of hydrocarbon reservoirs in complex structural areas.</div></div>","PeriodicalId":50253,"journal":{"name":"Journal of Asian Earth Sciences","volume":"295 ","pages":"Article 106842"},"PeriodicalIF":2.4,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365040","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}