Journal of Geophysical Research: Solid Earth最新文献

{"title":"Long-Time Delays in Induced Earthquakes Caused by Low-Permeability Bodies: Insights From the Xinfengjiang Reservoir, China","authors":"Lipeng He,&nbsp;Zhen Guo,&nbsp;Bin Luo,&nbsp;Qipeng Bai,&nbsp;Guangyao Yin,&nbsp;Keyuan Wu,&nbsp;Abayomi Gaius Osotuyi,&nbsp;Liwei Wang","doi":"10.1029/2024JB030579","DOIUrl":"10.1029/2024JB030579","url":null,"abstract":"<p>In many cases of induced seismicity, earthquakes occur significantly delayed to the initiation of industrial activities, yet the mechanisms behind these long-time delays remain poorly understood. In the Xinfengjiang Reservoir, an earthquake swarm became active in 2010, nearly 50 years after the initial impoundment in 1959. In this study, we conducted high-resolution 3D velocity tomography and focal mechanism analysis using a dense local seismic network. High-resolution seismic imaging identifies two downward migration channels enabling fluids to infiltrate the bedrock and low Vp/Vs anomalies at 5–10 km corresponding to low-permeability granitic bodies. Numerical simulations indicate that these Vp/Vs anomalies can delay pore-pressure diffusion by decades, resulting in delayed triggering of seismic events in the northwest of the reservoir. Our findings highlight the critical influence of low-permeability bodies in controlling the spatial-temporal evolution of reservoir-induced earthquakes and underscore the need to reconsider long-term seismic risk assessments for reservoirs situated in similar geological settings.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revisiting Seismicity Criticality: A New Framework for Bias Correction of Statistical Seismology Model Calibrations","authors":"Jiawei Li,&nbsp;Didier Sornette,&nbsp;Zhongliang Wu,&nbsp;Jiancang Zhuang,&nbsp;Changsheng Jiang","doi":"10.1029/2024JB029337","DOIUrl":"10.1029/2024JB029337","url":null,"abstract":"<p>The Epidemic-Type Aftershock Sequences (ETAS) model and its variants effectively capture the space-time clustering of seismicity, setting the standard for earthquake forecasting. Accurate unbiased ETAS calibration is thus crucial. But we identify three sources of bias, (a) boundary effects, (b) finite-size effects, and (c) censorship, which are often overlooked or misinterpreted, causing errors in seismic analysis and predictions. By employing an ETAS model variant with variable spatial background rates, we propose a method to correct for these biases, focusing on the branching ratio <i>n</i>, a key indicator of earthquake triggering potential. Our approach quantifies the variation in the apparent branching ratio (<i>n</i>_app) with increased cut-off magnitude (<i>M</i>_co) above the optimal cut-off (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msubsup>\u0000 <mi>M</mi>\u0000 <mtext>co</mtext>\u0000 <mtext>best</mtext>\u0000 </msubsup>\u0000 </mrow>\u0000 <annotation> ${M}_{text{co}}^{text{best}}$</annotation>\u0000 </semantics></math>), which is considered the best threshold for balancing catalog completeness and the amount of available data. The <i>n</i>_app(<i>M</i>_co) function yields insights superior to traditional point estimates. We validate our method using synthetic earthquake catalogs, accurately recovering the true branching ratio (<i>n</i>_true) after correcting biases with <i>n</i>_app(<i>M</i>_co). Additionally, our method introduces a refined estimation of the minimum triggering magnitude (<i>m</i>₀), a crucial parameter in the ETAS model. Applying our framework to the earthquake catalogs of California, New Zealand, the China Seismic Experimental Site in Sichuan and Yunnan provinces, and Noto Peninsula in Japan, we find that seismicity hovers away from the critical point, <i>n</i>_c = 1, remaining distinctly subcritical, however with values tending to be larger than recent reports that do not consider the above biases. Understanding seismicity's critical state significantly enhances our comprehension of seismic patterns, aftershock predictability, and informs earthquake risk mitigation and management strategies.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Characteristics of Microseisms Using the Australian Seismic Arrays","authors":"Abhay Pandey,&nbsp;Hrvoje Tkalčić,&nbsp;Xiaolong Ma","doi":"10.1029/2024JB031032","DOIUrl":"https://doi.org/10.1029/2024JB031032","url":null,"abstract":"<p>Earth's microseisms are continuously recorded by seismographs worldwide. Yet, studies using broadband data to analyze microseisms in Australia have been rare. Building on initial research efforts that relied on the Warramunga array in the continent's center, we expand the investigation of microseisms by utilizing seismic arrays in various locations with distinct apertures and geometries, particularly spiral-arm arrays. Motivated by expanding knowledge of short-period microseisms, which are less studied than the peak of secondary microseisms, we investigate their distribution and characteristics. We process 1-year continuous waveform data using beamforming at various periods. Using the back-projection method, we then investigate the source areas of surface waves and teleseismic P waves generated by ocean activities. We also examine the seasonal variability of microseismic sources and their relationship with the ocean wave hindcast model by comparing our observations of Rayleigh (Rg) waves with modeled Rg wave sources and juxtaposing back-projected P-waves with significant wave heights and modeled P-wave sources. Our results suggest that over interval of several months and longer, Rayleigh waves dominate from the coastlines, transitioning to higher mode Lg waves in the higher frequency bands. In contrast, P waves from the coastal and pelagic sources are observed particularly from tropical and equatorial regions. We also identify new patterns of body waves from the Southern Hemisphere perspective, which includes P waves arriving from French Polynesia islands and core phases from North Atlantic Ocean. Our study highlights the importance of utilizing multiple arrays and elucidates the critical roles of the frequency range and bathymetry.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB031032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144300471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lava Rheological Evolution and Flow Emplacement During the Deep Submarine Fani Maoré Eruption (Mayotte)","authors":"Pauline Verdurme,&nbsp;Oryaëlle Chevrel,&nbsp;Etienne Médard,&nbsp;Lucia Gurioli,&nbsp;Carole Berthod,&nbsp;Karoline Brückel,&nbsp;Jean-Christophe Komorowski,&nbsp;Patrick Bachèlery","doi":"10.1029/2024JB030363","DOIUrl":"https://doi.org/10.1029/2024JB030363","url":null,"abstract":"<p>The 2018–2020 lava flow field that built the submarine Fani Maoré volcano (Mayotte, north Mozambique Channel) at a water depth of 3,300 m was extensively sampled. We use the petrological analysis of samples collected at high spatial and temporal resolution to provide information on the textural evolution of the submarine lavas and its impacts on lava rheology, and thus on flow emplacement. Although the crystal content is lower than 10%, we observed two populations of crystals: (a) the micro-phenocrysts which mostly display skeletal shapes suggesting rapid growth upon magma ascent most likely due to decompression-driven crystallization, (b) the microlites resulting from post-emplacement groundmass crystallization. Combining both petrological and geochemical analyses, and applying rheological models, we show that lava viscosity increases from 158 ± 21 to 608 ± 134 Pa·s considering rigid bubbles or from 36 ± 5 to 485 ± 130 Pa·s considering deformable bubbles. Together with the waning ascent velocity and the decreasing effusion rates, this correlates with the evolution of lava flow emplacement dynamics, from long sheet lava flows to shorter flows exhibiting pillow mounts and multiple breakouts.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030363","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144300470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the Performance of GRACE-FO KBR and LRI in Detecting Mass Changes Using Along-Orbit Range-Accelerations","authors":"Zitong Zhu,&nbsp;Changqing Wang,&nbsp;Yihao Yan,&nbsp;Yuhao Xiong,&nbsp;Qinglu Mu,&nbsp;Haoming Yan,&nbsp;Zizhan Zhang","doi":"10.1029/2024JB029428","DOIUrl":"https://doi.org/10.1029/2024JB029428","url":null,"abstract":"<p>Gravity Recovery and Climate Experiment Follow-On is equipped with two inter-satellite ranging systems, notably the K-Band ranging (KBR) and the more precise Laser Ranging Interferometer (LRI), which enable the detection of variations in Earth's gravity. Assessing the differences between KBR and LRI is beneficial for understanding the performance of future LRI-only gravity satellite missions. However, due to limitations imposed by temporal aliasing errors, the advantages of LRI over KBR for monthly gravity field solutions are not clearly discernible. The along-orbit range-accelerations directly reflect the mass variations, providing a new way to evaluate the differences between LRI and KBR. Therefore, we selected different frequency bands and time scales to compare the along-orbit range-accelerations of KBR and LRI from 2019 to 2021. Analyzing the spatiotemporal-averaged along-orbit data, the results indicate a systematic difference between KBR and LRI, with a scale factor of about 0.977 over the selected 92 basins, while the scale factor is lower over oceanic regions. A comparison of the instantaneous along-orbit data for KBR and LRI reveals that the noise level of LRI in the [15.8–21 mHz] band is at least one order of magnitude lower than that of KBR. After simulating instrument noise, model errors, and time-variable signals, it was determined that KBR noise is likely the primary factor contributing to the systematic difference in capturing temporal signals between LRI and KBR. In addition, regions with a low signal-to-noise ratio (SNR) are more susceptible to noise, which diminishes the correlation between KBR and LRI along-orbit data.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Triggering Intensity Changes Over Time and Space as Measured by Continuous Waveforms in Southern California","authors":"Huiyun Guo,&nbsp;Emily E. Brodsky,&nbsp;Masatoshi Miyazawa","doi":"10.1029/2024JB030004","DOIUrl":"https://doi.org/10.1029/2024JB030004","url":null,"abstract":"<p>Dynamic triggering of earthquakes is when seismic waves from earthquakes induce seismic activity at a distance. The observability of the seismic wave stresses and their results presents a unique opportunity to understand earthquake interactions and associated hazard implications. The extent and timing of dynamic triggering at given specific stress changes still remain inadequately predicted due to limited studies and data sets. In particular, the requirement for complete, well-characterized catalogs to detect triggering systematically seriously limits the types of studies possible. To address this, we utilized 7-year continuous waveform data from 239 stations in southern California and used PhaseNet for phase picking to identify local earthquakes and measure triggering without constructing any earthquake catalog. We map the triggering intensity over the region and find that overall, the Mojave segment of the San Andreas is the most easily triggered region. However, the spatial pattern changes after the Ridgecrest earthquake and the area appears to become much less prone to triggering, likely due to an exhaustion of the faults near failure in the immediate aftermath of the Ridgecrest sequence. We further observe a slow decay rate of dynamic triggering and conclude that low-frequency waves (0.04–0.1 Hz) may be more effective in dynamic triggering than high-frequency waves (1–3 Hz) which is consistent with a rate-state assisted aseismic creep or hydrological triggering mechanism.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bi-Segment Fault Rupture and Long-Lasting Intraslab Aftershock Activity During the 2017 Mw 8.2 Tehuantepec, Mexico Earthquake","authors":"Fang Chen,&nbsp;Dun Wang,&nbsp;Shenghui Xu,&nbsp;Bing Yan,&nbsp;Junfeng Zhang,&nbsp;Yicun Guo,&nbsp;Dongdong Yao,&nbsp;Jiancang Zhuang,&nbsp;Gerardo Suárez,&nbsp;Peter Shearer","doi":"10.1029/2024JB030699","DOIUrl":"https://doi.org/10.1029/2024JB030699","url":null,"abstract":"<p>The 8 September 2017 Mw 8.2 Tehuantepec, Mexico earthquake was the second largest normal-faulting earthquake to occur in a shallow subduction environment since 1976 (GCMT catalog), and the earthquake sequence featured an extremely long-lasting and productive aftershock activity that deviated from typical intraslab earthquakes. Here we relocated the early aftershocks within 5 days following the mainshock and investigated the source process of the mainshock using back-projection and finite fault inversion methods. Our results showed that the earthquake rupture propagated along a ∼150-km-long, NW-striking normal fault. After rupturing approximately 100 km, it triggered activity on a ∼40-km-long fault located ∼50 km to the northeast. We employed a stochastic branching model to isolate the background seismicity rate, and compared this rate to those of five other earthquakes of similar magnitudes. The results indicated that the background seismicity of the Mexico event occurred at a much higher rate than those of the other five representative earthquakes. Considering that the rupture planes showed similar dip angles and strikes to those of the outer-rise normal faults, we suggest that the ruptures of the Mw 8.2 earthquake are possibly the reactivation of hydrated outer-rise normal faults in the subducting slab.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Thermally Induced Cracks on Elastic Modulus Dispersion and Attenuation in Fluid-Saturated Granite","authors":"A. K. Popoola,&nbsp;S. Chapman,&nbsp;A. Ògúnsàmì,&nbsp;J. Fortin,&nbsp;G. Grasselli","doi":"10.1029/2024JB030977","DOIUrl":"https://doi.org/10.1029/2024JB030977","url":null,"abstract":"<p>Toward better understanding seismic wave propagation in hard rocks, we investigated the impact of thermally induced cracks on the frequency-dependent elastic properties of granitic crystalline rocks. Thin-section microscopy revealed an increase in microcrack density and aperture with increasing treatment temperatures of the samples. Using the low-frequency forced-oscillation technique we probed the frequency-dependent Young's modulus and extensional-mode attenuation of the samples under dry and fluid-saturated conditions. Water and glycerin were used as pore fluids. The measurements under fluid-saturated conditions showed significant modulus dispersion and attenuation. Dispersion of Young's modulus, from low (0.2 Hz) to high (10⁵ Hz) apparent frequencies, reached up to 60%, and was accompanied by bell-shaped attenuation curves with <i>Q</i>_E⁻¹ as high as 0.16. With increasing treatment temperature, the peak attenuation shifted to higher frequencies. We attribute such frequency-dependent behavior of the Young's modulus and attenuation to microscopic (pore-scale) fluid flow between interconnected compliant cracks. The experimental results are consistent with predictions from the Crack-Pores Effective Medium (CPEM) model, indicating that the interplay between crack geometry and fluid dynamics governs the elastic response. This study highlights the necessity of accounting for squirt flow mechanisms when interpreting seismic field data and laboratory measurements of elastic properties in cracked crystalline rocks. Incorporating these effects into seismic modeling can significantly improve the accuracy of rock property estimations under subsurface conditions.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030977","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential Ice Sheet Modulation of Volcanism in West Antarctica: Constraints on the Cadence and Magnitude of Melt Delivery Into the Crust","authors":"Sean Wanket,&nbsp;A. Mark Jellinek,&nbsp;Catherine L. Johnson","doi":"10.1029/2024JB029730","DOIUrl":"https://doi.org/10.1029/2024JB029730","url":null,"abstract":"&lt;p&gt;Variations in continental ice mass related to changes in Earth's obliquity can modulate volcanism. At Marie Byrd Land, increases in crustal temperature related to the transfer of magmas and to the insulating effects of the West Antarctic Ice Sheet will reduce the effective viscosity of wall rocks, causing the volcanic response to be reduced in magnitude and delayed by up to &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∼&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${sim} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;10.25 kyr. For sufficiently high levels of crustal warming, magma storage is enhanced such that there is a negligible volcanic response. Tephra layers correlated to Mount Berlin volcanism signal increases in the frequency of silicic eruptions following maxima in the rate of deglaciation over 0–40 ka (interval 1) and possibly 100–135 ka (interval 2). During interval 1, an increase in eruption frequency at &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;≈&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${approx} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;8 ka lags deglaciation by &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;≈&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${approx} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;6.5–9 kyr. An increase in volcanism at 110 ka, by contrast, may lag deglaciation by &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;≥&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${ge} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;10.25 kyr. We hypothesize that a decrease in lag time of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∼&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${sim} $&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;10 ka reflects a period of reduced crustal warming related to a waning mantle melt supply. Using thermal models of the effects of ice sheet insulation and a time-dependent magma supply on the viscoelastic response of rocks hosting volcanically active magma reservoirs, we show that a periodic magma supply can drive oscillations between rheological regimes favoring eruption or storage. With additional constraints on the regional geothermal heat flux and eruption rate at Mount Berlin, an evolving response between 110 and 8 ka is consistent with magma injections with a period of &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;∼&lt;/mo&gt;\u0000 &lt;mn&gt;1&lt;/mn&gt;\u0000 &lt;msup&gt;\u0000 &lt;mn&gt;0&lt;/mn&gt;\u0000 &lt;mn&gt;6&lt;/mn&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt; ${sim} 1{0}^{6}$&lt;/annotation&gt;\u0000 &lt;/semant","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB029730","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Pattern of Uplift-Depression of the Pre-Cambrian Basement in the Sichuan Basin: Constraints From Multi-Seismic Parameter Imaging","authors":"Zhi Wang,&nbsp;Qiuding Du,&nbsp;Jian Wang,&nbsp;Yinyu Wen,&nbsp;Gang Zhou,&nbsp;Yuan He,&nbsp;Xiugen Fu","doi":"10.1029/2024JB030152","DOIUrl":"https://doi.org/10.1029/2024JB030152","url":null,"abstract":"<p>The structural configuration of the pre-Cambrian basement in the Sichuan Basin, a highly promising region for hydrocarbon exploration, has been a subject of long-standing debate. Here, we determined the fine-scale three-dimensional seismic models of the Sichuan Basin using 187,356 high-quality P- and S-wave travel time pairs recorded by 627 recently installed seismic stations. Meanwhile, 595 petroleum wells were collected to investigate their spatial distribution associated with the basement structures. Our findings reveal two depression belts, one extending through the western regions of Chengdu, Mianyang, and Wanyuan, and another in the eastern regions of Wanzhou, Fuling, and Chishui, forming a distinctive horseshoe-shaped depression structure. Concurrently, the central and southwest regions exhibit two uplift zones, constituting an L-shaped uplift structure. Approximately 76% of the petroleum wells are situated within the L-shaped uplift structure and its slope, while around 21% of the gas wells are located in the transitional zones between the depression structures or along their edges. The development of the depression structure is attributed primarily to the complex triple collision system involving the Qinghai-Tibet block in the west, the Cathsysia block in the southeast, and the North China block in the north. Conversely, the uplift structure is mainly caused by the southeastward movement of the Songpan-Ganze block and the northwestward movement of the Cathsysia block. These new findings reveal a significant correlation between the paleo-uplift structures, the distribution of hydrocarbon resources, and the geological conditions conducive to petroleum reservoirs in the Sichuan Basin, providing valuable insights for predicting potential petroleum reservoirs.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}