Fengxia Sun , Jun Hu , Weibin Gui , Ao Deng , Penghui Sun , Fahui Xiong , Jin Liu
{"title":"Oxygen fugacity-mediated carbonate reactions with siliceous fluids in shallow subduction zones","authors":"Fengxia Sun , Jun Hu , Weibin Gui , Ao Deng , Penghui Sun , Fahui Xiong , Jin Liu","doi":"10.1016/j.gsf.2024.101891","DOIUrl":"10.1016/j.gsf.2024.101891","url":null,"abstract":"<div><div>Sediments are one of the main carbon sinks in subduction zones, with CaCO<sub>3</sub> and SiO<sub>2</sub> being the main components in sediments. Their chemical stability plays a significant role in the form of carbon in the Earth’s mantle. Here we report the reactions of CaCO<sub>3</sub> with SiO<sub>2</sub> in hydrated sediments at 0.8–2.0 GPa, 400–500 ℃ and redox-buffered conditions relevant to shallow subduction zones. Our results show that the reaction CaCO<sub>3</sub> + SiO<sub>2</sub> = CaSiO<sub>3</sub> + C + O<sub>2</sub>(fluid) occurs under CoCoO and IW buffered conditions to generate wollastonite (CaSiO<sub>3</sub>) and carbonaceous material (CM). Moreover, wollastonite is formed by the dissolution-crystallization process, which may be significantly affected by oxygen fugacity, leading to distinct crystallization habits (<span><span>Yui, 1966</span></span>, <span><span>Schott et al., 2012</span></span>). Anhydrous experiments indicate that the reaction proceeds only in the presence of H<sub>2</sub>O within the pressure and temperature (P-T) range of this study. The reaction occurs more rapidly with aragonite-structured than calcite-structured CaCO<sub>3</sub>. Further, the experiment buffered with natural olivine at 1.0 GPa and 400 ℃ proves that the above reaction can occur during serpentinization processes in shallow subduction zones. More importantly, nanoscale CM may be generated under relatively reducing conditions, exhibiting Raman characteristics of kerogen. These results provide new insights into how deep carbon is distributed in the Earth’s interior.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101891"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141692311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xuwei Zhao , Joshua M.R. Muir , Mingda Lv , Zhigang Zhang , Xinjian Bao , Xi Liu
{"title":"Stabilizing inverse ringwoodite with defects, and a possible origin for the 560-km seismic discontinuity","authors":"Xuwei Zhao , Joshua M.R. Muir , Mingda Lv , Zhigang Zhang , Xinjian Bao , Xi Liu","doi":"10.1016/j.gsf.2024.101896","DOIUrl":"10.1016/j.gsf.2024.101896","url":null,"abstract":"<div><div>Ringwoodite is an important mineral in the mantle transition zone, and its cationic disorder can profoundly affect its physicochemical properties, but there is currently much controversy about this disorder. In this study, we investigate the cation disorder states of pure Mg<sub>2</sub>SiO<sub>4</sub>-ringwoodite and defective ringwoodite under mantle transition zone conditions through DFT calculations and thermodynamic models. Two stable endmembers are seen, one with normal ringwoodite structure and the other with inverted structure (its Si atoms and half of its Mg atoms have swapped sites). Our results indicate that pure ringwoodite does not invert (swap Mg and Si cations) under normal mantle temperatures but the introduction of a Si-excess, Mg-deficient defect induces a swap at normal mantle temperatures and this swap is likely induced by a wide range of defects including water. Thus, in the presence of such a defect or similar defects the olivine phase transition sequence may then go from olivine to wadsleyite to inverse ringwoodite, and then normal ringwoodite. We calculate the seismic properties of normal and inverse ringwoodite and find significantly slower wave speeds in inverted ringwoodite. Due to this difference the presence of inverse ringwoodite may provide a potential explanation for the discontinuous interface of seismic waves at the depth of ∼560 km.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101896"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141848931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Compressional and shear wave velocities of Fe-bearing silicate post-perovskite in Earth’s lowermost mantle","authors":"Jing Yang , Suyu Fu , Jin Liu , Jung-Fu Lin","doi":"10.1016/j.gsf.2024.101915","DOIUrl":"10.1016/j.gsf.2024.101915","url":null,"abstract":"<div><div>The bridgmanite (Bgm) to silicate post-perovskite (PPv) phase transition is believed to be the main cause for the distinct seismic features observed in the D'' layer, the lowermost region of the Earth’s mantle. However, the transition depth and elasticity of the PPv phase have been highly debated, as the chemical complexity within the D'' layer can largely affect the Bgm-PPv transition pressure and the associated velocity contrast. Experimental measurements of sound velocities for PPv with different chemical compositions under relevant lowermost-mantle conditions are essential but remain limited. In this study, we have reliably measured both compressional wave velocity (<em>V<sub>P</sub></em>), shear wave velocity (<em>V<sub>S</sub></em>), and density, for two Fe-bearing PPv compositions [(Mg<sub>0.85</sub>Fe<sub>0.15</sub>)SiO<sub>3</sub> and (Mg<sub>0.75</sub>Fe<sub>0.25</sub>)SiO<sub>3</sub>] at lowermost mantle pressures using Impulsive Stimulated Light Scattering (ISS), Brillouin Light Scattering (BLS), and X-ray Diffraction (XRD) in diamond anvil cells. Our results indicate that the velocities of Fe-bearing PPv at 120 GPa can be described by the following relationships: <em>V<sub>S</sub></em> (km/s) = 7.65–2.8<em>X<sub>Fe</sub></em> and <em>V<sub>P</sub></em> (km/s) = 14.11–3.8<em>X<sub>Fe</sub></em>, where <em>X<sub>Fe</sub></em> represents mole fraction of the Fe content. The variations in the Fe content of PPv may provide one of the explanations for the seismic lateral variations observed at the Earth’s core mantle boundary. By comparing our results with the high-pressure velocities of Bgm, our velocity model suggests significant discontinuities across the Bgm-PPv transition, characterized by a reduction in both <em>V<sub>P</sub></em> and <em>V<sub>Φ</sub></em>, and an increase in <em>V<sub>S</sub></em>. These findings highlight the importance of considering the influence of chemical composition, particularly Fe content which could vary significantly at the D'' region, on the seismic properties of the PPv phase. The observed velocity contrasts across the Bgm-PPv transition may contribute to the complex seismic signatures observed in the D'' layer, underscoring the potential role of this phase transition in interpreting the seismic features of the lowermost mantle region.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101915"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"A first-principles molecular dynamics study of molecular hydrogen diffusion in Fe-free olivine","authors":"Haibo Liu , Baohua Zhang , Hongzhan Fei , Lei Liu","doi":"10.1016/j.gsf.2024.101926","DOIUrl":"10.1016/j.gsf.2024.101926","url":null,"abstract":"<div><div>Molecular hydrogen (H<sub>2</sub>) may be an important form of water in nominally anhydrous minerals in the Earth’s mantle and plays a critical role in mantle water cycle, but the transport properties of H<sub>2</sub> remain unclear. Here, the diffusion of H<sub>2</sub> in Fe-free olivine lattice is investigated at pressures of 1–13 GPa and temperatures of 1300–1900 K by first-principles molecular dynamics. The activation energy and activation volume for H<sub>2</sub> diffusion in Fe-free olivine are determined to be 55 ± 8 kJ/mol and 3.6 ± 0.2 cm<sup>3</sup>/mol, respectively. H<sub>2</sub> diffusion in Fe-free olivine is faster than H<sup>+</sup> by 1–4 orders of magnitude and therefore it is more favorable for hydrogen transportation under upper mantle conditions. H<sub>2</sub> can be carried to the mantle transition zone by subducting slabs without releasing to the surrounding mantle. The upper mantle may act as a lid, preventing the releasing of H<sub>2</sub> produced in the deep mantle to the surface.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101926"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"A first-principles study of helium diffusion in aragonite under high pressure up to 40 GPa","authors":"Yu Huang , Mingqiang Hou , Hong Liu","doi":"10.1016/j.gsf.2024.101931","DOIUrl":"10.1016/j.gsf.2024.101931","url":null,"abstract":"<div><div>Helium diffusion in carbonates under mantle pressure is crucial for understanding thermal and chemical evolution of mantle. Based on the density functional theory (DFT) and the the climbing image nudged elastic band (CI-NEB) method, we performed first-principles calculations of diffusion characteristics of helium in perfect aragonite crystal under high pressure to 40 GPa. Our results show that He diffusion behaviors are controlled by pressure, temperature and crystal size. The activation energy increases, and the diffusion coefficients decrease significantly under high pressure. E<sub>a</sub>[1<!--> <!-->0<!--> <!-->0] increases from 176.02 kJ/mol to 278.75 kJ/mol, and E<sub>a</sub>[0<!--> <!-->0<!--> <!-->1] increases from 195.89 kJ/mol to 290.43 kJ/mol, with pressure increasing from 20 GPa to 40 GPa. At 700 K, the diffusion coefficients at 40 GPa is 7 orders of magnitude lower than that at 20 GPa; and at 1000 K it decrease 5 orders of magnitude. To ensure that at least 90% helium is not lost, we synthesized the temperature obtained from cooling and heating processes and derive the 'stable temperature range' for helium in aragonite. The obtained results show that the stable temperature range is 22–76 ℃ at 0 GPa and 641–872 °C at 40 GPa, for the crystal of 100–2000 μm size. Besides, the travel time of helium in aragonite under high pressure increases rapidly with pressure increasing. Our calculations indicate that helium can be quantitatively retained in aragonite in the deep mantle as long as the temperature is in the 'stable temperature range'. These results have certain implications for exploring the evolution of mantle and the storage of helium within it.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101931"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Equation of state and thermodynamic properties of liquid Fe-O in the Earth’s outer core","authors":"Miaoxu Xie , Jie Fu , Anatoly B. Belonoshko","doi":"10.1016/j.gsf.2024.101847","DOIUrl":"10.1016/j.gsf.2024.101847","url":null,"abstract":"<div><div>Equation of state (EoS) plays a crucial role in the prediction of the composition of the outer core. Here, we calculated pressure (<em>P</em>)-volume (<em>V</em>)-temperature (<em>T</em>) data of liquid iron-oxygen alloys (Fe-<em>X</em> wt.% O, <em>X</em> = 0, 2.8, 6.1, and 9.9) under the outer core conditions (∼136–330 GPa, 4000–6000 K) by first-principles molecular dynamics simulations. We established an EoS for liquid Fe-O alloys with parameters including <em>P</em>, <em>T</em>, <em>V</em>, and O concentrations. Consequently, thermodynamic properties of liquid Fe-O alloys such as density (<em>ρ</em>), thermal expansion coefficient, isothermal and adiabatic bulk modulus, and sound velocity (<em>V<sub>P</sub></em>) are calculated. To constrain the O content, we predicted the <em>ρ</em>-<em>P</em> and <em>V<sub>P</sub></em>-<em>P</em> profiles along the geotherm and compared them with data from the Preliminary Reference Earth Model (PREM). We conclude that the adiabatic <em>T</em> profile as a function of depth affects the prediction of O content dramatically. With several anchored <em>T</em><sub>ICB</sub>, the composition of Fe-6.1 wt.% O matches the PREM data with an acceptable range of error. But strictly speaking, the distribution in the outer core is probably uneven. In such case, we state that the O content in the outer core cannot be higher than approximately 6.1 wt.%.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101847"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140771491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yunfan Xu , Yu He , Shichuan Sun , Wei Zhang , Weiru Dai , Duck Young Kim , Heping Li
{"title":"Viscosities of hcp iron alloys under Earth’s inner core conditions","authors":"Yunfan Xu , Yu He , Shichuan Sun , Wei Zhang , Weiru Dai , Duck Young Kim , Heping Li","doi":"10.1016/j.gsf.2024.101935","DOIUrl":"10.1016/j.gsf.2024.101935","url":null,"abstract":"<div><div>Viscosity is critical for controlling the dynamics and evolution of the Earth’s inner core (IC). The viscosities of hexagonal close-packed (hcp) and body-centred cubic (bcc) Fe were studied experimentally and theoretically under Earth's core conditions. However, Earth’s inner core is mainly composed of Fe-Ni alloys with some light element impurities (Si, S, C, H, O), and the influence of impurities (Ni, Si, S, C, H, and O) on viscosity is still unknown. In this study, the diffusion coefficients of Fe, Ni, Si, S, C, H, and O were calculated under IC conditions using ab initio molecular dynamics (AIMD) and deep learning molecular dynamics (DPMD) methods. Among them, C, H, and O are highly diffusive like liquids in the lattice, while Fe, Ni, Si, and S diffuse through Fe site vacancies. In binary alloys, the influence of these impurities (Ni: 12.5%, S: 3.6%, Si: 3.1%, C: 1.3%, O: 1.7%, H: 0.4% by weight) on viscosity is insignificant. Based on the dislocation creep mechanism, the predicted viscosities of the hcp Fe alloys are 1 × 10<sup>14</sup>–2 × 10<sup>16</sup> Pa·s, which is consistent with the values predicted by free inner core nutation and seismic wave attenuation observations.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101935"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lei Liu , Ying Li , Tingting Li , Hanyu Wang , Shasha Liu , Panpan Zhao , Gerile Naren , Li Yi , Hong Liu , Fengxia Sun , Jianguo Du
{"title":"Wave velocities and anisotropy of rocks: Implication for origin of low velocity zone of the Qinling Orogenic Belt, China","authors":"Lei Liu , Ying Li , Tingting Li , Hanyu Wang , Shasha Liu , Panpan Zhao , Gerile Naren , Li Yi , Hong Liu , Fengxia Sun , Jianguo Du","doi":"10.1016/j.gsf.2024.101939","DOIUrl":"10.1016/j.gsf.2024.101939","url":null,"abstract":"<div><div>Structure and composition of Earth are fundamental importance in exploring the dynamic evolution of the crust and mantle. The Qinling Orogenic Belt (QOB) is located between the North China plate and the South China Plate, and is one of the main orogenic belts in China. To explore the composition and origin of anisotropy and the low wave velocity zone of the QOB, ten rock samples (gneiss and schist) were collected from the five sites of the QOB and the <em>P</em>- and <em>S</em>-wave velocities of these samples were measured under 0.6 to 2.0 GPa and 100 to 550 °C. The wave velocities increase with increasing pressure and decreasing temperature. The <em>V</em><sub>P</sub> and <em>V</em><sub>S</sub> of the schist and gneiss match the velocity of the middle and lower crust of the QOB, indicating that schist and gneiss are important component of the QOB. All the schist and gneiss samples exhibit obvious seismic anisotropy with 1.64%–17.42% for <em>V</em><sub>S</sub> and 2.93%–14.78% for <em>V</em><sub>P</sub> under conditions of crust and upper mantle. The CPO/LPO and layering distribution of mica in rock samples are the main reasons for this anisotropy. The <em>V</em><sub>S</sub> structures below the five sampled sites from seismic ambient noise tomography were built to explore the effect of schist and gneiss on the composition and structure of the QOB. The results indicate that orientation-arranged gneiss and schist driven by the tectonic stresses might be a new origin of the character of <em>V</em><sub>P</sub>/<em>V</em><sub>S</sub>, seismic anisotropy, and the low velocity zone in the QOB.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 1","pages":"Article 101939"},"PeriodicalIF":8.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rongzhen Qiao , Meijun Li , Donglin Zhang , Hong Xiao , Wenqiang Wang
{"title":"Polycyclic aromatic compounds in crude oil as proxies for Permian Tarim large igneous province activities","authors":"Rongzhen Qiao , Meijun Li , Donglin Zhang , Hong Xiao , Wenqiang Wang","doi":"10.1016/j.gsf.2024.102000","DOIUrl":"10.1016/j.gsf.2024.102000","url":null,"abstract":"<div><div>Large igneous provinces (LIPs), a critical area in Earth science, are closely related to paleoenvironmental evolution and biodiversity. The Permian Tarim large igneous province (TLIP) provides an ideal laboratory for correlational research. Previous reports show that the TLIP formed ∼300–262 Ma. Based on igneous lithology and the upper limit of single magmatic activity (<5 Ma), the TLIP can be divided into five main magmatic episodes. Core logging, seismic sections, lithofacies observations, and in-situ calcite U-Pb dating indicate diabase intrusions and a hydrothermal upwelling event (∼295.9–273 Ma) resulted from TLIP magmatic activity. The results indicate that polycyclic aromatic compounds (PACs) in oil are powerful proxies of magmatic intrusion and hydrothermal activity in the Permian TLIP. The existing diabase intrusion (EDI) samples show a higher concentration of high-molecular-weight (HMW) PACs (≥5-ring PACs) and greater combustion-derived PAC ratios. The distribution coupling between the diabase intrusion and PACs indicates that the HMW PACs are mainly derived from the cycloaddition reactions by the pyrogenic source (i.e., diabase intrusion). The conversion of phenanthrene (Phe), biphenyl (Bp), and dibenzothiophene (DBT) series compounds indicates that the oil is altered by hydrothermal activity. The hydrogenium and sulfur carried by the hydrothermal upwelling process promote the heteroatom incorporation of PACs. The cycloaddition and heteroatom incorporation reactions of PACs during the formation of LIPs offer a new perspective for evaluating their impact. PACs serve as effective proxies for LIPs and may also contribute to biological crises associated with LIPs.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 2","pages":"Article 102000"},"PeriodicalIF":8.5,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"A comparative study of various combination strategies for landslide susceptibility mapping considering landslide types","authors":"Lanbing Yu , Biswajeet Pradhan , Yang Wang","doi":"10.1016/j.gsf.2024.101999","DOIUrl":"10.1016/j.gsf.2024.101999","url":null,"abstract":"<div><div>Landslide susceptibility mapping (LSM) assists planners, local administrations, and decision-makers in preventing, mitigating and managing associated risks. This study proposes a novel DES-based framework that effectively captures the spatial developmental patterns of different landslide types, leading to higher precision LSM. The Wanzhou district (administrative division) of Chongqing Province, southwestern China, was selected as the test area, encompassing 881 landslides classified into rockfalls, reservoir-affected (RA) landslides, and non-reservoir-affected (NRA) landslides. Subsequently, three inventory maps and sixteen environment factors were used as inputs, with multicollinearity and importance analyses used to select the best factor combination for three types of landslides. Finally, the susceptibilities of rockfalls, RA and NRA landslides were combined by six combination strategies: Maximum, Mean, Probability, Voting, Stacking, and Dynamic Ensemble Selection (DES) models, and the optimal strategy was identified by area under the receiver operating characteristic curves (AUC), confusion matrix, and landslide distribution statistic. For LSM of individual landslide types, ResNet consistently outperformed traditional machine learning models, achieving testing AUC values of 0.8925, 0.9427, and 0.6754 for rockfalls, RA, and NRA landslides, respectively. The evaluation of the combination strategies revealed that the DES model achieved the highest testing AUC value of 0.8779, followed by Stacking (0.8728), Maximum (0.8704), Probability (0.8669), and Voting (0.8653), whereas the widely-used Mean method performed the worst (0.8503), even lower than the non-classified LSM (0.8587). The findings offer a robust approach for mitigating future landslide risks and minimizing their adverse impacts, providing valuable insights for geohazard management and decision-making.</div></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"16 2","pages":"Article 101999"},"PeriodicalIF":8.5,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143145886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}