Journal of Geophysical Research: Planets最新文献_第9页

Effect of Magnetic Field Configuration on Interchange Convection in the Jovian Inner Magnetosphere 磁场构型对木星内磁层交换对流的影响

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-30 DOI: 10.1029/2025JE009077

Yuxian Wang, Xiaocheng Guo, Michel Blanc, Hui Li, Chi Wang

{"title":"Effect of Magnetic Field Configuration on Interchange Convection in the Jovian Inner Magnetosphere","authors":"Yuxian Wang, Xiaocheng Guo, Michel Blanc, Hui Li, Chi Wang","doi":"10.1029/2025JE009077","DOIUrl":"10.1029/2025JE009077","url":null,"abstract":"The interchange instability drives the concurrent cold iogenic plasma convection and energetic particle injection in the Jovian inner magnetosphere. We use an improved Rice Convection model—Jupiter to simulate plasma transport under a more realistic magnetic field configuration, which is determined by magnetodisc currents. A series of runs were conducted to parametrically investigate the effect of the magnetic field configuration on the convection system. Simulation results show that the azimuthal magnetodisc current significantly influences plasma convection. The asymmetry in the longitudinal distribution of the azimuthal current strongly enhances the longitudinal asymmetry in the initial stage of magnetospheric evolution. The instability and associated plasma radial velocity tend to increase with increasing current intensity. By the quasi-steady stage, the longitude-averaged mass flux remains similar and is largely unaffected by variations in current intensity. The longitudinal asymmetry also becomes less pronounced during this phase. The radial current has little effect on the convection system, while the magnetic tilt angle can slightly reduce the instability.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 8","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the Efficacy of Ocean Formation With a Primordial Hydrogen Atmosphere 原始氢大气对海洋形成的影响

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-30 DOI: 10.1029/2024JE008786

Darius Modirrousta-Galian, Jun Korenaga

引用次数: 0

Topographic Stress as a Mechanical Weathering Mechanism on Titan 土卫六上地形应力的机械风化机制

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-29 DOI: 10.1029/2024JE008873

Cassandra Seltzer, Stephen J. Martel, J. Taylor Perron

{"title":"Topographic Stress as a Mechanical Weathering Mechanism on Titan","authors":"Cassandra Seltzer, Stephen J. Martel, J. Taylor Perron","doi":"10.1029/2024JE008873","DOIUrl":"10.1029/2024JE008873","url":null,"abstract":"Titan is unique among icy moons for its active surface processes and extensive erosional features. The presence of coarse sediment suggests that mechanical weathering breaks down Titan's surface material, but the exact processes of mechanical weathering are unknown. We tested the idea that topographic features perturb ambient crustal stresses enough to generate or enhance fractures. We used a two-dimensional boundary element model to predict the likely stress state within hypothetical erosional landforms on Titan, including river valleys and isolated ridges, and to model the locations and types of resulting fractures. Our results suggest that topographic stress perturbations are indeed sufficient to generate fractures and drive mechanical weathering, with little sensitivity to the density of the material making up Titan's crust and landforms and no dependence on its elastic moduli. For material density of 800 to1,200 kg/m3, opening-mode failure is predicted to occur within hypothetical Titan landforms with a width of hundreds of meters, relief of tens of meters or more, and horizontal tidal or tectonic stresses up to 1 MPa of compression, which encompasses typical predicted tidal stresses ranging between 10 kPa of compression and 10 kPa of tension. Under the same conditions, shear fracture is predicted to occur if the cohesion of the material is less than 100 kPa or if pore fluid pressures reduce local effective normal stresses. We therefore suggest that Titan's crust may be highly fractured and permeable, and that the predicted fractures could help generate sediment and provide pathways for subsurface transport of fluids.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 8","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008873","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725596","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}

引用次数: 0

Notional Geological Traverses, Station Activities, and Sample Collection on Mons Malapert, Lunar South Polar Region 月球南极地区马拉伯特山的名义地质穿越、台站活动和样品收集

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-29 DOI: 10.1029/2024JE008905

David A. Kring, Amy L. Fagan, Valentin T. Bickel, Ariel N. Deutsch, Lisa R. Gaddis, Juliane Gross, Harald Hiesinger, Therese M. Huning, José M. Hurtado Jr., Wajiha Iqbal, Katherine H. Joy, Laszlo Keszthelyi, Myriam Lemelin, Chris A. Looper, José M. Martínez-Camacho, Gordon R. Osinski, Eloy Peña-Asensio, Nico Schmedemann, Matthew A. Siegler, Sonia M. Tikoo, Carolyn H. van der Bogert, Kris Zacny

{"title":"Notional Geological Traverses, Station Activities, and Sample Collection on Mons Malapert, Lunar South Polar Region","authors":"David A. Kring, Amy L. Fagan, Valentin T. Bickel, Ariel N. Deutsch, Lisa R. Gaddis, Juliane Gross, Harald Hiesinger, Therese M. Huning, José M. Hurtado Jr., Wajiha Iqbal, Katherine H. Joy, Laszlo Keszthelyi, Myriam Lemelin, Chris A. Looper, José M. Martínez-Camacho, Gordon R. Osinski, Eloy Peña-Asensio, Nico Schmedemann, Matthew A. Siegler, Sonia M. Tikoo, Carolyn H. van der Bogert, Kris Zacny","doi":"10.1029/2024JE008905","DOIUrl":"10.1029/2024JE008905","url":null,"abstract":"The geology of a potential Artemis landing site on Mons Malapert is examined using remote sensing techniques and lessons learned from Apollo missions to the lunar surface. Orthomosaics, digital terrain models, illumination models, thermal conditions, crater size-frequency distribution analyses, geomorphological mapping, spectral and compositional analyses, lunar surface physical property analyses, and image processing to reveal the lunar surface within permanently shadowed regions (PSRs) were integrated with anticipated crew capabilities to develop three notional extravehicular activity (EVA) traverses lasting 3, 3, and 6 hr each. The traverse plans recover 43 samples, with a mass of 44 kg, secured in 54 kg of sample containers, including those NASA requires for samples collected in and around PSRs, which is within the 100 kg limit NASA allows for a landed mission. The geologic plan for the EVAs addresses seven Artemis III science objectives, 25 science goals within those objectives, and 90 specific investigations of varying priority in the Artemis III Science Definition Team Report (43 high-, 40 medium-, 2 medium-high-, and 5 low-priority investigations); for example, test and reveal new details about the lunar magma ocean hypothesis, the basin-forming epoch and implications for Solar System architecture, sources and distribution of volatiles, and regolith physical properties relevant to human and robotic exploration.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 7","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008905","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716918","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}

引用次数: 0

A Burial History of the Sedimentary Succession Preserved in Aeolis Mons, as Recorded by Fracture Networks at Maria Gordon Notch, Gale Crater, Mars 火星Gale陨石坑Maria Gordon Notch断裂网记录的Aeolis Mons沉积演替的埋藏史

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-28 DOI: 10.1029/2024JE008843

Steven G. Banham, John W. Cosgrove, Gerhard Paar, Sanjeev Gupta, Madison N. Hughes, John A. Grant, Claire A. Mondro, Rob Barnes, Abigail A. Fraeman

{"title":"A Burial History of the Sedimentary Succession Preserved in Aeolis Mons, as Recorded by Fracture Networks at Maria Gordon Notch, Gale Crater, Mars","authors":"Steven G. Banham, John W. Cosgrove, Gerhard Paar, Sanjeev Gupta, Madison N. Hughes, John A. Grant, Claire A. Mondro, Rob Barnes, Abigail A. Fraeman","doi":"10.1029/2024JE008843","DOIUrl":"10.1029/2024JE008843","url":null,"abstract":"Fractures in sedimentary rocks preserved within Gale crater record the deformational and burial history of the sediment infill. Fracture geometries and morphology can be used to time other geologic events, such as: compaction, diagenesis, fluid migration, geochemistry, and broader tectonic stresses within a basin. The rover Curiosity acquired images to construct 3D digital outcrop models used for characterization of fracture sets exposed in aeolian strata of the Mirador formation at Maria Gordon notch, identifying four distinct fracture sets. Three fracture sets formed during burial, and one during exhumation. The first group (Sets 1 and 2) consisted of bedding-parallel and bedding-bounded vertical fractures associated with early lithification and hydraulic fracturing of the rock as water escaped from isolated pores. Fracture Set 3—Vertical sulfate-filled fractures—formed after a second episode of diagenesis, as water escaped from deeper within the sedimentary succession. The final fracture set is barren and associated with exhumation of the crater fill. Modeling burial stress suggests that Sets 1 and 2 would form at depths greater than 1 km. The tensile strength of the rocks is generally higher than anticipated due to the absence of shear fractures (faults). Fracture Sets 1–3 demonstrate dewatering of the strata during burial, which continued up until maximum burial at ∼4.7 km. This water was driven toward the surface, providing water for diagenesis and alteration reactions and could have reasonably extended the habitability window within Gale crater.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 7","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008843","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714942","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}

引用次数: 0

Mars' Hourglass Landforms as Local Source-to-Sink Fluvial Systems 火星沙漏地貌是当地的河流系统

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-25 DOI: 10.1029/2024JE008745

A. S. Zaki, D. Wang, S. R. Baker, J. P. Grotzinger, J. Dickson, M. P. Lamb

{"title":"Mars' Hourglass Landforms as Local Source-to-Sink Fluvial Systems","authors":"A. S. Zaki, D. Wang, S. R. Baker, J. P. Grotzinger, J. Dickson, M. P. Lamb","doi":"10.1029/2024JE008745","DOIUrl":"10.1029/2024JE008745","url":null,"abstract":"Mars' landscapes offer enigmatic clues about a once wetter climate. Particularly puzzling are hourglass landforms, distinguished by two small (10–100 s km2) branching ridge systems connected by a narrow neck. This geometry resembles a source-to-sink fluvial system, but occurs on relatively flat terrain without a clear drainage direction. Here, we characterize 13 hourglass landforms and branched ridge networks that occur near the crustal dichotomy boundary and compare them with flume experiments and terrestrial analogs. We find that hourglass landforms are composed of branching and sinuous fluvial ridges, indicating that they are ancient river deposits exposed in positive relief due to substantial differential erosion. Typically, one side of the hourglass is composed of a ridge network with larger and more distinct ridges (type 1), whereas the other network has smaller cross-cutting ridges (type 2). In some cases, a remnant crater rim divides the two sides, with the type 1 network eroded into the crater wall, indicating a drainage network, and the type 2 network bounded by the crater, indicating an alluvial fan. Results indicate hourglass landforms are eroded remnants of small catchment-fan drainage systems that have experienced major climate change. They formed following impact cratering in a wet climate by runoff or seepage erosion where the crater breached the groundwater table. Subsequent wind erosion in a dry climate created ridge networks and completely removed the antecedent catchment-fan topography. Our findings on the distinction between different types of hourglass networks may help differentiate distributary from tributary networks in fluvial ridge systems elsewhere on Mars.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 7","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JE008745","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695838","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}

引用次数: 0

Detection of Marsquake Nests in InSight Data InSight数据中地震巢的检测

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-25 DOI: 10.1029/2024JE008782

Raphael F. Garcia, Iona Clemente, Mélanie Drilleau, Alexander Stott, Ludovic Margerin, Philippe Lognonné, Mark Panning, Bruce Banerdt

引用次数: 0

Recurring Ice Ages at Martian Mid-Latitudes Evidenced by Characterizing Double Layered Ejecta (DLE) Craters 火星中纬度地区反复出现的冰河期通过表征双层喷射（DLE）陨石坑得到证明

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-24 DOI: 10.1029/2024JE008883

Shengli Niu, Feng Zhang, James W. Head, Yanan Dang, Dijun Guo, Yang Liu, Yongliao Zou

{"title":"Recurring Ice Ages at Martian Mid-Latitudes Evidenced by Characterizing Double Layered Ejecta (DLE) Craters","authors":"Shengli Niu, Feng Zhang, James W. Head, Yanan Dang, Dijun Guo, Yang Liu, Yongliao Zou","doi":"10.1029/2024JE008883","DOIUrl":"10.1029/2024JE008883","url":null,"abstract":"Mars has undergone massive shifts in its spin-axis obliquity, which have caused cyclical climate changes resulting in the mobilization and redeposition of water ice between low-, mid-, and high-latitudes. The duration of ice ages in the Martian mid-latitudes is governed by periodic changes in obliquity. Although numerous geomorphic features indicative of mid-latitude ice ages have been reported, the temporal patterns and chronological extent of the mid-latitude ice ages (synonymous with periods of higher Mars obliquity) remain unclear. To address this issue, we used crater size-frequency distribution (CSFD) techniques to investigate 142 double layered ejecta (DLE) craters located in the mid-latitudes (30°–60°) of the northern and southern hemispheres, which are interpreted as being associated with icy substrates and recording mid-latitude ice ages. The dated 142 DLE craters have absolute model ages (AMAs) ranging from ∼4.5 Ma to 3.5 Ga, with their distribution pattern showing several pronounced peaks, suggesting that the Martian mid-latitudes have experienced multiple prolonged high-obliquity-driven ice ages over the past 3.5 Ga. The youngest DLE crater has a model age of ∼4.5 Ma, which aligns with the most recent major Martian obliquity shift (from average ∼35° to 25°) predicted by obliquity simulations to have occurred between ∼3 and 5 Ma. This suggests that the change of Martian obliquity from high to low average over the past 20 Ma has likely inhibited the formation of DLE craters in mid-latitude regions.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 7","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144688050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Pre-Maria Geologic History of the Imbrium Basin Preserved by Remnant Highlands Massifs 残高地块体保存的雨盆前玛丽亚期地质史

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-24 DOI: 10.1029/2024JE008646

B. D. Byron, C. M. Elder, L. Pigue, J.-P. Williams

{"title":"The Pre-Maria Geologic History of the Imbrium Basin Preserved by Remnant Highlands Massifs","authors":"B. D. Byron, C. M. Elder, L. Pigue, J.-P. Williams","doi":"10.1029/2024JE008646","DOIUrl":"10.1029/2024JE008646","url":null,"abstract":"The Imbrium basin is one of the largest and youngest impact basins on the Moon. It has experienced multiple phases of volcanism that filled the basin with basaltic lavas, obscuring most evidence of geologic activity prior to the emplacement of mare basalts. Elevated basin ring massifs, however, can retain some of that history due to their higher topographic elevation compared to the maria. In this work, we use thermal infrared and radar data sets in conjunction with compositional data sets to establish the presence of external material that has been deposited on top of several remnant basin massifs of Imbrium. These massifs originally formed as part of the Imbrium basin ring structure, but their material properties indicate that they have since experienced modification from outside sources. In southwest Imbrium, we present evidence that Mons Vinogradov was mantled by rock-poor, glassy pyroclastic material prior to the deposition of Eratosthenian-era basalts immediately surrounding the mons. In northern Imbrium, we find that Montes Recti and Montes Teneriffe were not affected by pyroclastic volcanism but rather were mantled by rock- and glass-poor ejecta materials likely related to the Iridum basin impact. At Mons Piton in eastern Imbrium, we see weaker glass signatures than those found at Mons Vinogradov, which we suggest could be due to a thin layer of reworked or partially buried glassy pyroclastic material. These results indicate that basin ring massifs provide a mechanism for studying the geologic history of lunar impact basins.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 7","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144688044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-Rheological Structure of the Martian Lithosphere: Effects of Mantle's Iron Content 火星岩石圈的热流变结构：地幔铁含量的影响

IF 4 1区地球科学

Journal of Geophysical Research: Planets Pub Date : 2025-07-24 DOI: 10.1029/2024JE008672

Rungang Si, Lin Chen, Ling Chen, Yongxin Pan

{"title":"Thermo-Rheological Structure of the Martian Lithosphere: Effects of Mantle's Iron Content","authors":"Rungang Si, Lin Chen, Ling Chen, Yongxin Pan","doi":"10.1029/2024JE008672","DOIUrl":"10.1029/2024JE008672","url":null,"abstract":"Meteorite, cosmochemical, and geophysical data collectively suggest that the Martian mantle is enriched in iron by a factor of 2–3 compared to Earth's mantle. However, the impact of the high iron content on the thermo-rheological structure and evolution of the Martian lithosphere remains unclear. Here, we combine the latest constraints from the InSight mission and experimental results to quantitatively assess the effect of mantle iron content on the Martian lithosphere. The results show that an increase in iron content from <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mtext>Fa</mtext>\u0000 <mn>10</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${text{Fa}}_{10}$</annotation>\u0000 </semantics></math> to <math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mtext>Fa</mtext>\u0000 <mn>30</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation> ${text{Fa}}_{30}$</annotation>\u0000 </semantics></math> leads to a temperature increase of 200–300 K at a depth of 200 km. This high iron content also weakens Mars' lithosphere and yields a decrease in ∼30 km on average in effective elastic thickness and ∼70 km in thermal lithospheric thickness. The iron-weakening effect thins the transition layer between the lithosphere and convective mantle and enlarges their viscosity contrast to four orders of magnitude. We speculate that high iron content promotes decoupling of the lithosphere from the deep mantle and causes Mars to stay in a stagnant lid regime. Our work indicates that future Martian lithosphere studies should consider the iron-weakening effect.","PeriodicalId":16101,"journal":{"name":"Journal of Geophysical Research: Planets","volume":"130 7","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144688045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0