Tectonophysics最新文献

{"title":"Numerical modelling of lithosphere-asthenosphere interaction and intraplate deformation in the Gulf of Guinea","authors":"Jaime Almeida ,&nbsp;Hamzeh Mohammadigheymasi ,&nbsp;Marta Neres ,&nbsp;Stéphanie Dumont","doi":"10.1016/j.tecto.2024.230581","DOIUrl":"10.1016/j.tecto.2024.230581","url":null,"abstract":"<div><div>To present day, the phenomenon of intraplate deformation and its associated earthquakes remain elusive. In this work, we argue that intraplate deformation may result from the interaction between lithospheric and upper mantle dynamic processes. To this extent, we targeted the Gulf of Guinea and adjacent Western Africa, a region with both low plate velocities and clear asthenosphere dynamics, allowing us to isolate the individual underlying dynamic constraints which govern intraplate deformation. Thus, here we present 3D numerical geodynamic models of the asthenosphere-lithosphere interaction in the Gulf of Guinea, ran with the state-of-the-art modelling code LaMEM. We employ different initial/boundary conditions such as: (a) identical vs different spreading rates for the varying segments of the Atlantic mid-ocean ridge, (b) the presence/absence of weak zones (e.g., the Romanche/Central-African shear zones), and (c) the effect exerted by an active mantle plume, with a varying ascension velocity. Seismicity patterns was used to evaluate the models and their validity. Our results suggest that intraplate deformation within the Gulf of Guinea is influenced by the spreading rate of the mid-ocean ridge, with stress being localized around the ocean-continent transition and existing shear zones. They also suggest that the existence of an underlying stress source (e.g., a mantle plume) beneath the Cameroon region is crucial to explain the epicenter distribution/deformation in the region.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"895 ","pages":"Article 230581"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Slip instability of dilatant and fluid-saturated faults","authors":"Cheng Mei","doi":"10.1016/j.tecto.2024.230598","DOIUrl":"10.1016/j.tecto.2024.230598","url":null,"abstract":"<div><div>The mechanisms of slip instabilities of dilatant and fluid-saturated faults remain controversial, particularly in low-permeability environments. Using a rate and state friction model including the effects of dilatancy, we conduct a linearized stability analysis of a one-dimensional spring-slider model and reexamine the critical stiffness (<span><math><msub><mi>k</mi><mi>c</mi></msub></math></span>) of the fault zone as a function of fluid diffusivity and dilatancy factor. Our analytical results indicate that under fully-drained conditions, <span><math><msub><mi>k</mi><mi>c</mi></msub></math></span> is independent of dilatancy factor, while under poorly-drained conditions, <span><math><msub><mi>k</mi><mi>c</mi></msub></math></span> depends on dilatancy factor and fluid diffusivity. Both analytical and numerical results show that a non-negative <span><math><msub><mi>k</mi><mi>c</mi></msub></math></span> always exists, even for highly-dilatant and poorly-drained faults where <span><math><msub><mi>k</mi><mi>c</mi></msub></math></span> is proportional to fluid diffusivity. This implies that dilatancy does not alter the inherent (in)stability of fault slip, and that a sufficiently low system stiffness can always produce unstable fault slips without a critical pore pressure or critical dilatancy factor. These findings may provide new insights into effects of dilatancy on fault instability. The numerical results further illustrate that the fault slip acceleration tends to be significantly suppressed by increasing dilatancy factor and decreasing fluid diffusivity. These results may explain ubiquitous slow-slip events on natural faults that vary in length.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"895 ","pages":"Article 230598"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788824","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":"Influence of seismometer misorientation on crustal thickness and Vp/Vs estimated with teleseismic P-wave receiver functions","authors":"Diogo Farrapo Albuquerque ,&nbsp;Marcelo Peres Rocha ,&nbsp;George Sand França ,&nbsp;Marcelo Bianchi ,&nbsp;Reinhardt A. Fuck","doi":"10.1016/j.tecto.2024.230577","DOIUrl":"10.1016/j.tecto.2024.230577","url":null,"abstract":"<div><div>We analyzed the influence of seismometer misorientation on crustal thickness and Vp/Vs estimated with teleseismic P-wave receiver functions simulating orientation errors during the rotation procedure of the horizontal components from true NS-EW (North-South, East-West) to RT (Radial-Tangential) coordinate system. During this procedure, we incrementally added 5° to the azimuth of the NS and EW components. The influence of the misorientation on P-wave teleseismic receiver functions was confirmed by the analysis of different parameters, such as normalized amplitude of P, Ps and multiple phases, reproduction of the radial component and crustal thickness and Vp/Vs estimates. This analysis indicated |45°| as the maximum misorientation allowed to consider crustal thickness, Vp/Vs, and geophysical interpretation reliable. For misorientations larger than |75°|, the reliability is low, and the data could be considered inappropriate for receiver function technique and crustal studies. We also identified some signs of misorientation: P-wave polarity inversion in radial RF trace combined with strong P-wave troughs in the tangential one, low Ps-wave normalized amplitude, reproduction of the radial lower than 90 % for most receiver function traces, and large standard deviations in crustal thickness and Vp/Vs estimates. Since most of the seismometers deployed at Brazilian Seismographic Network were well oriented (only three have orientation errors larger than 45°), in general, previous studies that used data from those stations for estimating crustal thickness and Vp/Vs using the H-k method are reliable. However, in future versions of Brazilian crustal models, the estimates using stations with misorientation larger than |45°| must be recalculated applying an azimuth correction. Finally, since normalized amplitudes are very sensitive to misorientation, the analysis of P and Ps amplitudes in radial receiver functions can be used as a tool to estimate seismometer orientation error and other issues affecting station gain.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"895 ","pages":"Article 230577"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142788827","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":"Seismotectonic assessment of the High Atlas orogen: Implications for the 8 September Mw 6.8 El-Haouz earthquake","authors":"Hamza Skikra ,&nbsp;Abdelali Fadil ,&nbsp;Youness Ouassanouan ,&nbsp;Khalid Lakhouidsi ,&nbsp;Abdelilah Tahayt ,&nbsp;Abderrahmane Soulaimani ,&nbsp;Lahcen El Moudnib","doi":"10.1016/j.tecto.2024.230573","DOIUrl":"10.1016/j.tecto.2024.230573","url":null,"abstract":"<div><div>The Moroccan High Atlas is a slowly deforming intracontinental orogenic belt, characterized by moderate and diffuse seismic activity. The 8 September 2023 Mw 6.8 El-Haouz earthquake, one of the most powerful quakes recorded in North Africa, has intensified investigations into the seismotectonics of the High Atlas. This study examines seismotectonic patterns in the High Atlas using seismological and geodetic data to better understand the mechanisms driving such seismic events. Seismological data indicate active shortening in the region, contributing to ongoing mountain building. Present-day deformation is partitioned between thrust and strike-slip faulting, with NW-SE compression, consistent with the broader stress field in North Africa. Frequency-magnitude distribution analysis indicates that the Western High Atlas exhibited low b-values, slightly lower than 1, in the eight years preceding the El-Haouz earthquake, with an low b-value (∼ 0.8 ± 0.1) near the epicenter, suggesting high stress accumulation in the region. GNSS observations reveal that the High Atlas experiences low geodetic velocities compared with the Rif collision belt, with displacements below 1 mm/year. Notably, the axial zone of the Western High Atlas exhibits an uplift of 1.1 mm/yr. The combination of moderate shortening and relatively higher uplift prior to the El-Haouz earthquake suggests that present-day deformation in the Western High Atlas is predominantly accommodated by the reactivation of inherited faults in the axial zone. This is further corroborated by the distribution of aftershocks, which supports a steeply dipping seismogenic fault manifested by the Tizi n'Test Fault.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"895 ","pages":"Article 230573"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181957","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":"Intra-salt deformation of K-Mg salt layers in diapiric structures, an analogue modelling approach","authors":"Alexandre Pichat ,&nbsp;Naïm Célini ,&nbsp;Sylvie Schueller ,&nbsp;Jean-Marie Mengus ,&nbsp;Claude Gout ,&nbsp;Sabine Delahaye ,&nbsp;Jean-Paul Callot","doi":"10.1016/j.tecto.2025.230635","DOIUrl":"10.1016/j.tecto.2025.230635","url":null,"abstract":"<div><div>K-Mg salts are one to six orders of magnitude less viscous than halite and therefore flow faster than other evaporites. However, their influence and deformation patterns in diapiric structures are poorly understood. Analogue models are useful for simulating salt deformation, but have never been used to model heterogeneous salt formations involving low-viscosity K-Mg salts. We have developed a new material, designated Glime, which has a near-Newtonian behavior over the range of experimental strain rates, and a viscosity one to two orders of magnitude lower than that of the silicone putty. The Glime allowed us to simulate K-Mg salt layers interbedded with halite (represented by silicone) in analogue models of passive diapirs that were X-ray scanned. The results show that K-Mg salt absorbs more deformation than halite, forming intrasalt pillows in the early stages of diapiric growth. During diapir development, K-Mg salts are radially redistributed at the diapir apex and/or intruded by the lower salt units, leading to their verticalization along the diapir flanks. Shearing and rapid flow within verticalized K-Mg salts cause them to enlarge and form bulges at layer pinch-outs, above which vortex flows may also form. Verticalized K-Mg salts also act as shear zones promoting the rise of the lower salt layers. The results provide first-order guidelines for predicting intra-salt diapiric deformation involving K-Mg rich salts and call for further experiments to enhance our understanding. These findings are critical for anticipating the challenges of drilling within diapiric structures and optimizing the development of salt caverns for green hydrogen storage.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"898 ","pages":"Article 230635"},"PeriodicalIF":2.7,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Erratum to “Geophysically-BASED structural framework and tectonic evolution of the Brazilian equatorial margin” [Tectonophysics 896 (2025) /230604]","authors":"Francisco Gabriel Ferreira de Lima ,&nbsp;Walter Eugênio de Medeiros ,&nbsp;Emanuel Ferraz Jardim de Sá","doi":"10.1016/j.tecto.2025.230627","DOIUrl":"10.1016/j.tecto.2025.230627","url":null,"abstract":"","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"897 ","pages":"Article 230627"},"PeriodicalIF":2.7,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142248","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":"Reactivation of critically-stressed basement faults and related induced seismicity in the southeastern Sichuan basin","authors":"Mengke An ,&nbsp;Rui Huang ,&nbsp;Derek Elsworth ,&nbsp;Fengshou Zhang ,&nbsp;Zhen-Yu Yin ,&nbsp;Liuke Huang ,&nbsp;Zhengyu Xu","doi":"10.1016/j.tecto.2025.230628","DOIUrl":"10.1016/j.tecto.2025.230628","url":null,"abstract":"<div><div>The southeastern Sichuan basin possesses abundant gas shale resources that are currently being recovered. The basement strata are seismically active making it important to understand the effect of fluid injection during geo-energy extraction and storage. We recovered outcropping basement rocks and conducted friction experiments on simulated rock gouge to assess the potential for frictional stability. Meanwhile, we also calculated the poroelastic Coulomb stresses resulting from fluid injection to define the impact of stress perturbations on fault stability. These results are combined with the seismic reflection images to analyze the seismic potential. Results indicate the basement rocks include clay-lean granites and sandstones and clay-rich slates; gouge frictional strength and stability are controlled by the clay contents. The gouge frictional strength monotonically decreases and fault stability is enhanced with increasing clay content. Poroelastic stresses induced by fluid injection can reactivate critically-stressed faults within 2 km of the injection site, but decay rapidly with increasing distance. The experimental-modelling results combined with seismic reflection profiles indicate that basement fault stability is controlled by various factors, including fault aseismic slip in the pressurized zones, poroelastic stress transfer from fluid injection and gouge mineralogy. These results have important implications for understanding instability of basement faults induced by fluid injection during energy extraction and storage and contribute to reducing seismic hazard in the southeastern Sichuan basin.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"898 ","pages":"Article 230628"},"PeriodicalIF":2.7,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031476","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":"Mixed-mode deformation in a rock bridge between two fault segments","authors":"Erina Prastyani ,&nbsp;Benoît Cordonnier ,&nbsp;Jessica McBeck ,&nbsp;Jérôme Weiss ,&nbsp;François Renard","doi":"10.1016/j.tecto.2025.230624","DOIUrl":"10.1016/j.tecto.2025.230624","url":null,"abstract":"<div><div>Analyzing how fracture networks develop from preexisting isolated fault segments in immature faults may provide knowledge of the preparation process leading to fault growth and dynamic rupture. We reproduce this process experimentally using triaxial compression experiments coupled with time-lapse in-situ synchrotron X-ray tomography in Westerly granite core samples (10 mm diameter, 20 mm height) that contain two parallel notches oriented at 30° with respect to the axis of the cylinder. We conducted the experiments at room temperature with a constant confining pressure of 20 MPa. We image microfracture development, characterize the microphysical processes of damage and fault growth in an intact rock bridge between the notches, and analyze the evolution of fractures oriented at 0°–17° (extensile) and 17°–32° (shear) as the rock approached failure. We also elucidate the strain localization process in the deforming rock using digital volume correlation. Our study offers a detailed comparison of microfracture and strain field development during fault growth.</div><div>Results indicate that the rock bridge between the notches becomes damaged with a damage rate and a fracture rate diverging as the rock approaches macroscopic failure. Immediately preceding failure, shear fractures dominate the fracture networks. DVC analysis showed that the deformation process is mixed-mode, accommodated by dilation and shear strain, with the shear strains being more localized than the dilation. Furthermore, regions of high dilative strain host both extensile and shear fractures. These findings provide valuable insights into the fault growth process within an intact rock bridge between two fault segments in nature, demonstrating how mixed-mode deformation facilitates fault maturation.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"897 ","pages":"Article 230624"},"PeriodicalIF":2.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Seismic reflection analysis of the Western Sichuan Basin: Implications for the decoupling relationship between deep and shallow structures","authors":"Shan Yan ,&nbsp;Yang Li ,&nbsp;Zhongquan Li ,&nbsp;Gen Li ,&nbsp;Yigui Han","doi":"10.1016/j.tecto.2025.230626","DOIUrl":"10.1016/j.tecto.2025.230626","url":null,"abstract":"<div><div>The structural relationship between the deep and shallow structures of the Western Sichuan Basin (WSB) holds significant information for comprehending the tectonic framework of the basin and the eastward expansion of the Tibetan Plateau. Although the regional structural geometries in the WSB have been extensively studied, the kinematics and controlling factors are still debated. Field observations, seismic reflection profiles, and balanced sections hereby were used to quantitatively analyze the structural geometry and kinematic characteristics of the WSB and to estimate the structural shortening of major tectonic units, respectively. Combined with near-surface geological data, the seismic reflection profiles reveal a set of tectonic patterns decoupled vertically. The deep layer is characterized by stable marine sediments and Neoproterozoic basement rifts bounded by deep faults, while the shallow layer primarily comprises a distinct foreland basin consisting of a series of anticlines and thrust faults. The Middle Triassic evaporites, as the decollement layer of the decoupled tectonic patterns, regulated the deformation of the shallow asymmetrical anticlines and long-distance thrust faults, forming a typical thin-skinned structure. The balanced sections have confirmed a pattern of structural wedges with thrust faults in the shallow layers of the WSB, revealing that deformation propagation attenuates from the Longmenshan Thrust Belt (LMSTB) to the eastern part of Longquanshan (with a shortening rate &lt; 5 %). The primary contribution to this deformation is attributed to the LMSTB and the Xiongpo anticline. The joint seismic sections show that the distribution of the Triassic decollement layer gradually contracts from southwest to northeast, indicating a decrease in the intensity of stress regulation. On the basis of the spatio-temporal framework, we argue that the mechanism of the complex structural configuration in the WSB is controlled by the Middle Triassic decollement layer and exhibits different characteristics in deep and shallow structures.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"897 ","pages":"Article 230626"},"PeriodicalIF":2.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142989058","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":"Geological and geodetical vertical deformation profiles across the Kuradake fault group, Central Kyushu, SW Japan: Estimation of the proportion of triggered aseismic slip in the total late Quaternary slip","authors":"Tabito Matsu'ura ,&nbsp;Kazuya Ishitsuka","doi":"10.1016/j.tecto.2025.230625","DOIUrl":"10.1016/j.tecto.2025.230625","url":null,"abstract":"<div><div>We investigated the Kuradake fault group, which includes the Matoishi-bokujo-I (MbI), Tsumushi-yama (Ty), and Matoishi-hatabe-III (MhIII) faults, on the northwestern rim of Aso caldera, SW Japan. To obtain the total vertical displacement since ca. 87 ka, we conducted a geological survey, borings, and seismic profiling, and to obtain the vertical displacement due to slip triggered by the 2016 Kumamoto earthquake (<em>Mw</em> = 7.0 on 16 April 2016), we conducted interferometric synthetic aperture radar (InSAR) monitoring. In 10 arrayed borings along survey section Krdk 21 across the fault group, we recognized pre-Aso-2 (age unknown), Aso-2 (146 ka), Aso-3 (133–120 ka), and Aso-4 (ca. 87 ka) tephras, and additional pyroclastic flow/fall deposits. We reconstructed the Aso-4 flow depositional surface by subtracting the cover sediment thickness and estimated normal slips of 18–20 m and 15 m on the Ty and MbI faults, respectively. Triggered aseismic normal slips on the MhIII, Ty, and MbI faults during the 2016 earthquake determined by InSAR monitoring were 5–15, 13–15.5, and 14–21.5 cm, respectively. The slip amounts on the Ty and MbI faults are not compatible between the geological and geodetical observations. Further, because the geologically observed dextral slip component on the Ty fault was not observed by the InSAR monitoring, the observed slip on that fault is not related to 2016 event. Based on the geodetical slips on the Ty and MbI faults and the recurrence interval (2 ky) of the 2016 source (Futagawa fault) reported by paleoseismic studies, total vertical displacement since 87 ka was 5.7–6.8 m and 6.2–9.5 m, respectively, accounting for ≥ 29–38 % and ≥ 41–63 %, respectively, of the geological vertical displacement of the Aso-4 surface. The geologically expected oblique and additional normal slips on the Ty and MbI faults can account for the residual displacements.</div></div>","PeriodicalId":22257,"journal":{"name":"Tectonophysics","volume":"898 ","pages":"Article 230625"},"PeriodicalIF":2.7,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}