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The causes and impacts of highly productive silicic caldera systems: A case study of Witori Volcano, Papua New Guinea 高产硅质破火山口系统的成因和影响:以巴布亚新几内亚威托里火山为例
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-19 DOI: 10.1016/j.earscirev.2025.105375
C.W. Firth , C.O. McKee , R. Torrence , R.J. Blong , J. Specht , S.M. Eggins , S.F. Jenkins , N. Mosusu , H. Machida
Witori volcano, on the island of New Britain in the south-west Pacific, is a highly active silicic caldera system. Throughout the Holocene it has produced at least five Plinian eruptions (VEI ≥ 6), with eight smaller VEI 3–5 eruptions in the past ∼ 1000 years. Tephra from the larger Plinian eruptions has recently been identified on the New Guinea mainland, up to 700 km downwind of Witori, necessitating re-evaluation of eruption magnitudes and output rate of this volcano. Since 6.4 ka > 38.8 km3 DRE of magma has been erupted at Witori. Uncertainty in the size of numerous eruptions means this volume may be > 60 km3 DRE, more than twice that of similar systems like Taupō. Comparison of deposit characteristics with Santorini and Tambora suggests the largest eruptions from Witori (W-K1–6.4 ka; W-K2–3.4 ka) potentially reached magnitudes of VEI 7. These eruptions involved crystal-poor, high-silica (∼73–76 wt% SiO2) rhyolites. The SiO2 content of Witori magmas decrease with declining eruption magnitude and increased eruption frequency, indicating a direct relationship between eruption size and timescales of fractionation. Witori magmas are low-K tholeiites, produced by high-degrees of partial melting within the mantle. The high eruption rate observed at Witori results from rapid transit of magma through the crust, facilitated by widespread crustal fracturing/faulting in central New Britain associated with the rotation of the South Bismarck microplate. Archaeological records demonstrate individual eruptions caused significant impacts with abandonment periods of multiple generations; however, humans repeatedly returned following each eruption.
威托里火山位于西南太平洋的新不列颠岛上,是一个高度活跃的硅火山口系统。在整个全新世,它至少发生了5次Plinian喷发(VEI≥6),在过去~ 1000年中有8次较小的VEI 3-5喷发。最近在新几内亚大陆发现了来自较大的普林尼火山喷发的Tephra,位于Witori顺风方向700公里处,需要重新评估该火山的喷发规模和喷发速度。自从6.4 ka >; 38.8 km3 DRE岩浆在Witori喷发。许多喷发规模的不确定性意味着它的体积可能为60立方千米,是像陶井这样的类似系统的两倍多。与圣托里尼岛和坦博拉岛的矿床特征比较表明,威托里岛最大的喷发(W-K1-6.4 ka; W-K2-3.4 ka)可能达到VEI 7级。这些喷发涉及晶体贫乏,高硅(约73-76 wt% SiO2)流纹岩。威托里岩浆的SiO2含量随喷发震级的减小和喷发频率的增加而降低,表明喷发规模与分馏时间尺度有直接关系。威托里岩浆是低钾拉斑岩,由地幔内部高度部分熔融产生。在威托里观测到的高喷发速率是岩浆快速穿过地壳的结果,与南俾斯麦微板块的旋转有关的新不列颠中部广泛的地壳破裂/断裂促进了岩浆快速穿过地壳。考古记录表明,个别火山喷发对几代人的遗弃期造成了重大影响;然而,每次火山爆发后,人类都会反复返回。
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引用次数: 0
Plants in the shadows: Bridging the gap in paleoecology and paleoart 阴影中的植物:弥合古生态学和古艺术之间的鸿沟
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-16 DOI: 10.1016/j.earscirev.2025.105371
José Carrión , Gabriela Amorós , Ariadna Amorós , María Alejandra Gandolfo , Evelyn Kustatscher
Paleoart, long considered peripheral to paleoscience, has become a powerful medium for visualizing extinct life and landscapes. Yet its historical trajectory has been dominated by zoocentric traditions, where plants are relegated to vague backdrops despite their central role in Earth system dynamics. This review examines the epistemological and cultural consequences of such plant blindness, situating paleoart at the intersection of paleontology, paleoecology, and landscape studies. We provide a critical historical synthesis, tracing the representation of vegetation from nineteenth-century phytocentric pioneers to the consolidation of animal-centered canons and the persistence of clichés that obscure paleobotanical data. Drawing on case studies across the Paleozoic, Mesozoic, and Cenozoic, we show how integrating fossil pollen and spores, macrofossils, taphonomic and multiproxy records—transforms paleoart into a form of visual scientific modeling that reveals ecological interactions, climatic drivers, and biogeographic patterns invisible in faunal reconstructions alone. Beyond historiography, we evaluate methodological frameworks for translating fragmentary data into coherent visual ecosystems, emphasizing the role of taphonomy, landscape reconstruction, and explicit protocols of inference. Particular attention is given to recent botanical paleoart that has redefined the visual vocabulary of deep time, replacing repetitive templates (“monkey puzzles and parking lots”) with floristically accurate reconstructions anchored in paleobotanical evidence. Finally, we highlight the Quaternary record, where paleoart remains less developed despite the abundance of high-resolution palynological, anthracological, and macrofossil archives. Here we present original reconstructions from the Iberian Peninsula that illustrate how glacial refugia, ecological mosaics, and vegetation dynamics can be made visible through art. These examples demonstrate that paleoart, when botanically informed, is not ancillary illustration but a methodological extension of paleoecology.
古艺术,长期以来被认为是古科学的边缘,已经成为可视化灭绝生命和景观的有力媒介。然而,它的历史轨迹一直被以动物为中心的传统所主导,在这种传统中,植物尽管在地球系统动力学中发挥着核心作用,但却被降级为模糊的背景。这篇综述考察了这种植物盲目性的认识论和文化后果,将古艺术置于古生物学、古生态学和景观研究的交叉点。我们提供了一个关键的历史综合,追踪植被的表现,从19世纪以植物为中心的先驱,到以动物为中心的经典的巩固,以及模糊古植物学数据的陈腐的持久性。通过古生代、中生代和新生代的案例研究,我们展示了如何整合化石花粉和孢子、大化石、地形学和多代理记录,将古艺术转化为一种可视化的科学建模形式,揭示了生态相互作用、气候驱动因素和生物地理模式,这些模式在单独的动物群重建中是看不见的。除了史学,我们还评估了将零碎数据转化为连贯视觉生态系统的方法框架,强调了地貌学、景观重建和明确的推理协议的作用。特别关注的是最近的植物古艺术,它重新定义了深时间的视觉词汇,用固定在古植物学证据中的精确的植物区系重建取代了重复的模板(“猴子拼图和停车场”)。最后,我们强调第四纪记录,尽管有丰富的高分辨率孢粉学,人类学和大化石档案,但古艺术仍然不太发达。在这里,我们展示了来自伊比利亚半岛的原始重建,说明了冰川避难所,生态马赛克和植被动态如何通过艺术呈现出来。这些例子表明,从植物学的角度来看,古艺术不是辅助的例证,而是古生态学方法论的延伸。
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引用次数: 0
Petrogenetic interpretation of Archean low δ18O zircon: Implications for origin of continental crust on early Earth 太古宙低δ18O锆石成因解释:对早期地球大陆地壳成因的启示
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-15 DOI: 10.1016/j.earscirev.2025.105370
Yong-Fei Zheng
The origin of Archean continental crust remains a critical yet unresolved question in the evolution of early Earth, closely tied to debates on the emergence of plate tectonics. This review focuses on the petrogenesis of Archean tonalite-trondhjemite-granodiorite (TTG) suites and the origin of low δ18O values (1.0–2.7 ‰) observed in Hadean to Archean zircons, which challenge conventional interpretations involving meteoric water interaction. By integrating zircon U-Pb ages and O isotope data with the thermodynamic principle of stable isotope geochemistry (equilibrium O isotope fractionations between basaltic rock and water converge to 0 ± 1 ‰ at high temperatures of >400 °C), it is demonstrated that these low δ18O signatures would originate from high-temperature seawater-hydrothermal alteration of the juvenile basaltic crust at mid-ocean ridges, rather than meteoric water involvement. Even if the low δ18O signature could exist in the felsic crust on early Earth, the formation of low δ18O rocks would necessitate a three-stage mechanism. The first is the O isotope exchange between seawater and thick (30–40 km) basaltic crust along mid-ocean ridges during plate divergence, the second is the collisional thickening of the juvenile crust to 60–80 km during plate convergence, and the third is the partial melting of the hydrated, ultrathick basaltic crust during lithospheric rifting to produce TTG magmas in the post-convergent stage. The lithospheric rifting is induced by upwelling of the asthenospheric mantle in response to foundering of the lithospheric mantle. This three-stage model for the petrogenesis of Archean TTG rocks keeps pace with an ancient Wilson cycle at high Archean mantle temperatures, emphasizing divergent-convergent plate coupling and lithospheric rifting in response to poloidal mantle convection. It argues against subduction-driven TTG magmatism but affirms the operation of ancient plate tectonics through the water-rock interaction during the seafloor spreading and then the crustal anatexis due to the asthenospheric upwelling consequential to the lithospheric foundering. Therefore, the low δ18O zircon growth is linked to the high-temperature seawater-hydrothermally altered sources at divergent plate margins, and the TTG generation is attributed to the post-collisional reworking at convergent plate margins. This results in a holistic model for the growth of Archean continental crust and the geodynamic regime of early Earth. As such, the petrogenesis of Archean TTG rocks witnesses the operation of ancient plate tectonics at that time.
太古宙大陆地壳的起源一直是早期地球演化中一个关键但尚未解决的问题,与板块构造论的出现密切相关。本文综述了太古宙闪长岩-闪长岩-花岗闪长岩(TTG)套的岩石成因,以及冥古宙至太古宙锆石低δ18O值(1.0 ~ 2.7‰)的成因,对传统的大气水相互作用解释提出了挑战。结合稳定同位素地球化学热力学原理(玄武岩与水之间的平衡O同位素分异在400℃高温下趋于0±1‰),综合锆石U-Pb年龄和O同位素数据,认为这些低δ18O特征来源于洋中脊幼玄武岩地壳的高温海水-热液蚀变,而非大气水的参与。即使低δ18O特征在地球早期的长英质地壳中存在,低δ18O岩石的形成也需要一个三阶段机制。一是板块辐散期海水与洋中脊厚(30-40 km)玄武质地壳O同位素交换,二是板块辐合期幼体地壳碰撞增厚至60-80 km,三是岩石圈裂陷期水合超厚玄武质地壳部分熔融,在辐合后阶段产生TTG岩浆。岩石圈裂陷是由岩石圈地幔沉降引起的软流圈地幔上涌引起的。这一太古宙TTG岩石成因的三阶段模型与太古宙高地幔温度下的古威尔逊旋回保持同步,强调了板块辐散-收敛耦合和岩石圈裂陷对极向地幔对流的响应。它否定了俯冲驱动的TTG岩浆作用,但肯定了古代板块构造的作用是通过海底扩张过程中的水-岩相互作用,以及岩石圈沉降后软流圈上涌引起的地壳融合作用。因此,低δ18O锆石的生长与发散型板块边缘的高温海水热液蚀变源有关,TTG的产生与辐合型板块边缘的碰撞后改造有关。由此建立了太古宙大陆地壳生长和早期地球动力学机制的整体模型。因此,太古宙TTG岩的成岩作用见证了当时古板块构造的作用。
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引用次数: 0
Coupling relationship between the Carnian Pluvial Episode and the global coal accumulation recommencement 卡尼期洪积期与全球聚煤重启的耦合关系
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-13 DOI: 10.1016/j.earscirev.2025.105367
Peixin Zhang , Minfang Yang , Jing Lu , Zhongfeng Jiang , Kai Zhou , Li Wu , Xiaotao Xu , Huijuan Chen , Xuran Zhu , Yanghang Guo , Huajun Ye , Longyi Shao
<div><div>Since the terrestrialization of plants during the Silurian-Devonian periods, the Earth has undergone multiple phases of global coal accumulation, accompanied by significant changes in terrestrial plants. Among them, the most remarkable is the Late Triassic Carnian Pluvial Episode (CPE; ∼234 Ma–232 Ma), which brought an end to the longest global “coal gap” that had persisted since the terrestrial colonization of plants. The CPE is mainly associated with eruptions of the Wrangellia Large Igneous Province (LIP), and it is characterized by a sharp increase in global temperature and humidity, accompanied by significant changes in marine and terrestrial ecosystems and the re-emergence of global coal accumulation. Many studies have focused on the link between the evolution of terrestrial ecosystems in different regions of the world and the CPE. However, a systematic analysis and study of the internal coupling between global coal accumulation during the CPE and simultaneous global or regional environmental-climatic change events is still lacking. In this study, we systematically review and summarize existing evidence of terrestrial environmental-climatic and plant changes associated with the re-emergence of global coal accumulation during the CPE, discuss its patterns and driving processes, and analyze its driving mechanisms. Evidence from multiple nearly synchronous carbon isotope negative excursions, Hg enrichment anomalies (Hg/TOC ratio peaks), and Hg isotopes directly shows that the Wrangellia LIP drove significant changes in terrestrial environments, climate, and vegetation during the CPE. The eruption of the Wrangellia LIP released massive amounts of CO<sub>2</sub>, triggering global warming. Consequently, atmospheric circulation and hydrological cycles were enhanced, which led to increased global rainfall and a shift in climatic conditions from warm-dry to warm-humid – conditions that favored plant growth and preservation. These changes were concurrently accompanied by the extensive development of terrestrial deltas and swamps, rising lake levels, intensified chemical weathering, and the proliferation of hygrophytic plants and freshwater algae. In response to these processes, the burial of terrestrial organic carbon significantly increased, facilitating the reappearance of global coal accumulation. The increase in organic carbon burial and the resumption of global coal accumulation exerted negative feedback on global atmospheric conditions, which could partially offset the greenhouse effect caused by greenhouse gas emissions from the Wrangellia LIP. As a result, the environment and climate stabilized, ultimately leading to the termination of the CPE. These results indicate that LIPs can occur in multiple pulse forms and have a powerful capacity to alter the carbon cycle, trigger environmental and climatic changes, and drive macro-biological evolution. In contrast, global coal accumulation plays a crucial role in providing climatic stabil
自志留纪—泥盆纪植物陆栖化以来,地球经历了全球多期聚煤,陆生植物也发生了显著变化。其中,最引人注目的是晚三叠世卡尼期雨积期(CPE; ~ 234 Ma - 232 Ma),它结束了自植物陆地殖民以来持续时间最长的全球“煤隙”。CPE主要与Wrangellia大火成岩省(LIP)的喷发有关,其特征是全球温度和湿度的急剧增加,伴随着海洋和陆地生态系统的显著变化,以及全球煤聚集的重新出现。许多研究集中在世界不同地区陆地生态系统的演变与CPE之间的联系上。然而,对于CPE期间全球煤炭聚集与同期全球或区域环境气候变化事件之间的内在耦合关系,尚缺乏系统的分析和研究。在此基础上,系统回顾和总结了与CPE期间全球煤聚集重新出现相关的陆地环境-气候和植物变化的现有证据,探讨了其模式和驱动过程,并分析了其驱动机制。来自多个几乎同步的碳同位素负漂移、汞富集异常(Hg/TOC比值峰值)和汞同位素的证据直接表明,Wrangellia LIP在CPE期间驱动了陆地环境、气候和植被的显著变化。弗兰格利亚LIP的喷发释放了大量的二氧化碳,引发了全球变暖。因此,大气环流和水文循环得到加强,导致全球降雨量增加,气候条件从温暖干燥转向温暖潮湿,这有利于植物的生长和保存。这些变化同时伴随着陆地三角洲和沼泽的广泛发展、湖泊水位上升、化学风化加剧以及湿生植物和淡水藻类的繁殖。与此相应,陆相有机碳埋藏显著增加,促进了全球煤聚集的重现。有机碳埋藏的增加和全球煤积累的恢复对全球大气条件产生了负反馈,可以部分抵消弗兰格里亚高原温室气体排放造成的温室效应。结果,环境和气候趋于稳定,最终导致CPE的终止。这些结果表明,lip可以以多种脉冲形式发生,并且具有改变碳循环,引发环境和气候变化以及驱动宏观生物进化的强大能力。相比之下,全球煤炭积累在提供气候稳定方面起着至关重要的作用。
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引用次数: 0
Alkaline magmatism in the Southern Granulite Terrane, India: Insights into Precambrian tectonics and mantle evolution 印度南部麻粒岩地体的碱性岩浆作用:对前寒武纪构造和地幔演化的启示
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-09 DOI: 10.1016/j.earscirev.2025.105364
M.R. Nandu , Y. Anilkumar , M. Santosh , Cheng-Xue Yang , Sung Won Kim , A.P. Pradeepkumar , M.P. Manu Prasanth , A.S. Amrutha
Alkaline magmatism through space and time over the globe has contributed significantly to crustal growth and the formation of important rare metal and rare earth reserves. The Southern Granulite Terrane (SGT) in India is an important archive of Proterozoic alkaline complexes that are largely unmetamorphosed and undeformed, occurring as linear chains aligned along crustal-scale paleo-suture zones or major transcrustal faults. These alkaline magmatic suites include syenites, carbonatites, nepheline syenites, alkali granites and lamprophyres occur as ring complexes, individual plutons, intrusive lenses, dykes, and plugs. Here we present a comprehensive overview of the occurrence, petrology, geochemistry, and geochronology of seventeen alkaline magmatic suites, highlighting their petrogenetic significance and geodynamic implications. The Proterozoic alkaline magmatism in the Southern Granulite Terrane is marked by three distinct phases: an early Paleoproterozoic episode (∼2498–2340 Ma), a mid-Neoproterozoic episode (∼830–720 Ma), and a late Neoproterozoic (∼620–572 Ma). These alkaline magmatic suites exhibit variable morphologies, with some of the Cryogenian alkaline–carbonatite complexes occurring as ring or crescent-shaped structures. Carbonatites, unlike associated alkaline silicate and ultramafic rocks, display markedly steeper rare earth element (REE) patterns and pronounced LREE/HREE fractionation, consistent with derivation from low-degree partial melting of a mantle source. The majority of δ18O and δ13C values for the Southern Granulite Terrane carbonatites fall within the field of primary mantle-derived carbonatites. Radiogenic SrNd isotopic signatures show a temporal trend toward more enriched compositions from the Paleoproterozoic to the Neoproterozoic, reflecting progressive geochemical evolution of the source mantle through time. The Sr–Nd–Pb–C–O isotopic compositions of these alkaline rocks and carbonatite indicate the involvement of compositionally heterogeneous mantle domains beneath the Southern Granulite Terrane. Field relationships, along with mineralogical and isotopic data, suggest that syenites, carbonatites, and pyroxenites were emplaced as discrete magmatic intrusions derived from compositionally distinct sources, rather than representing derivatives of a single parental melt. The alkaline rocks and carbonatites exhibit post-collisional geochemical signatures and isotopic evidence for source heterogeneity, consistent with an extensional tectonic regime. Prolonged extension likely facilitated lithospheric thinning, promoting asthenospheric upwelling and decompression melting of a metasomatized lithospheric mantle. These magmas subsequently interacted with subduction-modified lithospheric components of varying ages, producing compositionally diverse melts that were emplaced as shallow-level intrusions along major crustal-scale suture zones.
在全球范围内,碱性岩浆活动贯穿时空,对地壳生长和重要稀有金属和稀土储量的形成作出了重大贡献。印度南部麻粒岩地体(SGT)是一个重要的元古代碱性杂岩档案,这些杂岩基本上是未变质和未变形的,沿地壳尺度古缝合带或主要跨地壳断裂呈线性链排列。这些碱性岩浆套装包括正长岩、碳酸岩、霞石正长岩、碱性花岗岩和煌斑岩,它们以环状杂岩体、单个岩体、侵入透镜体、岩脉和岩塞的形式出现。本文全面介绍了17个碱性岩浆套的产状、岩石学、地球化学和年代学,强调了它们的成岩意义和地球动力学意义。南麻粒岩地体元古代碱性岩浆作用可分为三个阶段:古元古代早期阶段(~ 2498 ~ 2340 Ma)、新元古代中期阶段(~ 830 ~ 720 Ma)和新元古代晚期阶段(~ 620 ~ 572 Ma)。这些碱性岩浆组表现出不同的形态,一些低温系碱性碳酸盐岩复合体呈环状或新月形结构。与伴生的碱性硅酸盐和超镁质岩石不同,碳酸盐岩显示出明显陡峭的稀土元素(REE)模式和明显的LREE/HREE分馏,与地幔源低程度部分熔融的衍生相一致。南麻粒岩地系碳酸盐岩的δ18O和δ13C值大部分落在原生幔源碳酸盐岩范围内。放射性成因的SrNd同位素特征显示,从古元古代到新元古代,源区的化学成分逐渐富集,反映了源区地幔的地球化学演化过程。这些碱性岩和碳酸盐岩的Sr-Nd-Pb-C-O同位素组成表明南麻粒岩地体下存在成分不均匀的地幔域。现场关系以及矿物学和同位素数据表明,正长岩、碳酸岩和辉石岩是由不同成分来源的岩浆侵入体形成的,而不是单一母质熔体的衍生物。碱性岩和碳酸盐岩具有碰撞后地球化学特征和物源非均质性的同位素证据,符合伸展构造制度。延长的伸展可能促进了岩石圈变薄,促进了软流圈上涌和交代岩石圈地幔的减压融化。这些岩浆随后与不同年代的俯冲修正岩石圈成分相互作用,产生了成分多样的熔体,这些熔体沿着主要的地壳尺度缝合带作为浅层侵入体侵位。
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引用次数: 0
A dataset and review of empirical estimation relationships for landslide runout distances: Comment 滑坡跳动距离的数据集和经验估计关系综述:评论
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-09 DOI: 10.1016/j.earscirev.2025.105354
Bo Zhao
The paper “A dataset and review of empirical estimation relationships for landslide runout distances” by Gong et al. (2025), published in Earth-Science Reviews (doi: https://doi.org/10.1016/j.earscirev.2025.105225), presents a noteworthy contribution to the field. It not only summarizes recent advances in estimating landslide runout distances but also introduces new empirical relationships based on a recently compiled dataset. Landslide runout distance is strongly influenced by spatial confinement conditions (landslide topography) during movement and accumulation. However, as the authors themselves note, the current empirical relationships does not account for landslide topography at all. Moreover, the existing dataset has certain limitations that many landslide types are not taken into consideration. In this comment, I aim to offer some constructive input regarding landslide topography and compiled landslide dataset, which may help address some of these gaps.
Gong等人(2025)发表在《地球科学评论》(doi: https://doi.org/10.1016/j.earscirev.2025.105225)上的论文“滑坡跳动距离的经验估计关系的数据集和回顾”对该领域做出了值得注意的贡献。它不仅总结了估计滑坡跳动距离的最新进展,而且介绍了基于最近编制的数据集的新的经验关系。滑坡跳动距离在运动和堆积过程中受到空间约束条件(滑坡地形)的强烈影响。然而,正如作者自己指出的那样,目前的经验关系根本不能解释滑坡地形。此外,现有的数据集也有一定的局限性,许多滑坡类型没有考虑在内。在这篇评论中,我的目标是提供一些关于滑坡地形和汇编的滑坡数据集的建设性意见,这可能有助于解决其中的一些空白。
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引用次数: 0
Corrigendum to ‘Hydrothermal vents through space and time: experimentally simulating dynamic flow-through systems on Earth and other worlds’ [Earth Science Reviews 271 (2025) 105311] “通过空间和时间的热液喷口:实验模拟地球和其他世界上的动态流动系统”的勘误表[地球科学评论271 (2025)105311]
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-03 DOI: 10.1016/j.earscirev.2025.105353
Bronwyn L. Teece , Selene M.C. Cannelli , C. Felipe Garibello , Shawn E. McGlynn , Laura M. Barge
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引用次数: 0
Corrigendum to “Revisiting the Dom Feliciano Belt and surrounding areas – An integrated geophysical and isotope geology approach” [Earth-Science Reviews, 266 (2025), 105135] “重新考察Dom Feliciano带及其周边地区-综合地球物理和同位素地质方法”的勘误表[地球科学评论,266 (2025),105135]
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-03 DOI: 10.1016/j.earscirev.2025.105340
C.D. Teixeira , T.J. Girelli , H. Serratt , F. Chemale Jr.
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引用次数: 0
Borehole geophysical studies in glaciers. Part I: Borehole logging 冰川的钻孔地球物理研究。第一部分:钻孔测井
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-03 DOI: 10.1016/j.earscirev.2025.105357
Pavel G. Talalay , Nan Zhang , Xiaopeng Fan , Yazhou Li , Da Gong , Bing Li
Glaciers including ice sheets, ice caps, and mountain glaciers cover more than 10 % of the Earth's land area. Borehole drilling in glaciers serves a wide range of scientific purposes, such as the evolution of the Earth's climate and environment, formation and movement of snow and ice, impact of glacial phenomena on landscapes, subglacial environment, and so on. Geophysical logging is a crucial component of most ice-drilling projects, providing valuable in-situ data on the physical and structural properties of the natural snow and ice surrounding the borehole. These properties include temperature, density, creep parameters, optical characteristics, visual stratigraphy, and subglacial electrical resistivity. However, conventional geophysical logging techniques are often not suitable for ice due to its distinct physical properties. Over the past six decades, specialized downhole tools—such as light-emitting loggers and optical televiewers—have been developed to image borehole walls and resolve stratigraphy at resolutions comparable to those of ice core analysis. These advanced methods bridge ice-core data with regional glaciological parameters, such as ice flow dynamics and geothermal heat flux. This paper provides an overview of current and emerging borehole logging techniques and their applications in glacier research, while a subsequent paper discusses long-term in-situ borehole observatories.
包括冰盖、冰帽和高山冰川在内的冰川覆盖了地球陆地面积的10%以上。冰川钻孔具有广泛的科学用途,如地球气候和环境的演变、冰雪的形成和运动、冰川现象对景观的影响、冰下环境等。地球物理测井是大多数冰钻项目的重要组成部分,它提供了有关井眼周围天然冰雪的物理和结构特性的宝贵现场数据。这些属性包括温度、密度、蠕变参数、光学特征、可视地层和冰下电阻率。然而,由于冰具有独特的物理性质,传统的地球物理测井技术往往不适用于冰。在过去的60年里,专门的井下工具(如发光记录仪和光学电视)已经被开发出来,用于成像井壁,并以与冰芯分析相当的分辨率来解析地层。这些先进的方法将冰芯数据与区域冰川参数(如冰流动力学和地热热通量)联系起来。本文概述了当前和新兴的钻孔测井技术及其在冰川研究中的应用,随后的论文讨论了长期的原位钻孔观测。
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引用次数: 0
Ecohydrological and geomorphological importance of glacial lakes 冰川湖的生态水文和地貌重要性
IF 1 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2025-12-02 DOI: 10.1016/j.earscirev.2025.105356
Taigang Zhang , Weicai Wang , Adam Emmer , Gang Jin , Keshao Liu , Baosheng An , Tandong Yao
Rapidly expanding glacial lakes are transforming cryospheric, hydrologic, ecologic, and societal dynamics worldwide. They affect water resources, hydropower, sediment transport, and carbon cycles while also being influenced by the increased instability and interactions with their surroundings due to global warming. Here, we present a state-of-the-art synthesis on glacial lakes, focusing on their ecohydrological and geomorphological importance. First, warming-driven deglaciation is inducing extensive glacial lake expansion, enhancing freshwater storage capacity and hydropower potential. Sediment-rich meltwater promotes underwater weathering, positioning glacial lakes as important yet underrecognized carbon sinks, with a preliminary global carbon consumption flux estimated at over 0.26 Tg C-CO2 yr−1. Second, glacial lakes profoundly reshape high mountain landscapes by acting as sediment sinks, drivers of catastrophic sediment transport events, and modulators of cascading hazards. They trap sediment fluxes from glacier-fed systems, creating long-term geological archives and influencing downstream geomorphology. Extreme lake outbursts can mobilize vast quantities of sediment, dramatically altering river networks, floodplains, and valley morphology. Moreover, interactions between expanding proglacial lakes, retreating and calving glaciers, and unstable ice-rich moraine dams heighten geomorphic instability under ongoing warming, increasing the susceptibility of lake outbursts. Overall, glacial lakes can significantly affect geomorphic evolution, biogeochemical cycles, and socioeconomic activities in the surrounding areas up to tens of kilometers downstream. Future research requires systematic field planning and monitoring to reveal these critical interactions and improve local risk management.
迅速扩大的冰川湖泊正在改变世界范围内的冰冻圈、水文、生态和社会动态。它们影响着水资源、水电、泥沙运输和碳循环,同时也受到全球变暖导致的不稳定性增加和与周围环境相互作用的影响。在这里,我们提出了一个最先进的冰川湖综合,重点是他们的生态水文和地貌学的重要性。首先,全球变暖导致的冰川消融导致冰湖大面积扩张,增强了淡水储存量和水电潜力。富含沉积物的融水促进了水下风化,将冰川湖定位为重要的但尚未得到充分认识的碳汇,初步估计全球碳消耗通量超过0.26 Tg C-CO2 yr - 1。其次,冰川湖作为沉积物汇、灾难性沉积物运输事件的驱动因素和级联灾害的调节器,深刻地重塑了高山景观。它们捕获了冰川补给系统的沉积物通量,形成了长期的地质档案,并影响了下游的地貌。极端的湖泊爆发可以调动大量的沉积物,极大地改变河网、洪泛平原和山谷的形态。此外,扩大的前冰期湖泊、退缩和崩解的冰川以及不稳定的富冰碛垄之间的相互作用加剧了持续变暖下地貌的不稳定性,增加了湖泊溃决的易感性。总体而言,冰湖可以显著影响下游数十公里范围内周边地区的地貌演化、生物地球化学循环和社会经济活动。未来的研究需要系统的实地规划和监测,以揭示这些关键的相互作用并改善当地的风险管理。
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Earth-Science Reviews
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