IF 5.8 1区地球科学

Geology Pub Date : 2026-02-02 DOI: 10.1130/g53908.1

Lingxiao Gong, Peter van der Beek, Edward R. Sobel, Taylor F. Schildgen, Apolline Mariotti, Maxime Bernard, Johannes Glodny, Isabel Wapenhans

{"title":"Late-Cenozoic tectonic versus glacial control on the topographic evolution of the Terskey Range, Kyrgyz Tian Shan","authors":"Lingxiao Gong, Peter van der Beek, Edward R. Sobel, Taylor F. Schildgen, Apolline Mariotti, Maxime Bernard, Johannes Glodny, Isabel Wapenhans","doi":"10.1130/g53908.1","DOIUrl":"https://doi.org/10.1130/g53908.1","url":null,"abstract":"The relative influence of tectonics and climate on topography and surface processes remains poorly constrained in many mountainous regions. The effect of late-Cenozoic glaciations on global erosion rates and relief is particularly disputed. The Terskey Range, in the Kyrgyz Tian Shan, can provide key insights to these questions due to its well-documented late-Cenozoic tectonic activity and substantial Quaternary glacier cover. To address these questions, we investigated two valleys within the Terskey Range, separated by 40 km: the glacial Barskoon Valley and the mostly fluvial Kyzyl Suu Valley. We present new apatite (U-Th-Sm)/He (AHe) thermochronology data from valley-bottom samples in the Barskoon Valley and re-analyzed published low-temperature thermochronology data for both valleys. Inverse 3-D thermal-kinematic modeling indicates a shared tectonic history for both valleys, including accelerated thrusting starting at 10−8 Ma. In contrast to the Kyzyl Suu Valley, the Barskoon Valley additionally records a 22% increase in relief over the past ∼2 m.y., suggesting rapid valley deepening following the initiation of glaciation in the Terskey Range. These results imply that the impact of Quaternary climate change on erosion rates is highly spatially variable.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"15 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115913","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

Pronounced typhoon landfall imprints in the Holocene precipitation isotope record from coastal South China 华南沿海全新世降水同位素记录中明显的台风登陆印记

IF 5.8 1区地球科学

Geology Pub Date : 2026-02-02 DOI: 10.1130/g53699.1

Jiantao Cao, Yanming Ruan, Liping Tian, Fajin Chen, Chao Huang, Xiaobo Jin, Zhiguo Rao, Guodong Jia

{"title":"Pronounced typhoon landfall imprints in the Holocene precipitation isotope record from coastal South China","authors":"Jiantao Cao, Yanming Ruan, Liping Tian, Fajin Chen, Chao Huang, Xiaobo Jin, Zhiguo Rao, Guodong Jia","doi":"10.1130/g53699.1","DOIUrl":"https://doi.org/10.1130/g53699.1","url":null,"abstract":"Typhoon-induced heavy rainfall profoundly affects coastal society and economies, yet predicting its future remains challenging. Historical typhoon records are crucial for deciphering the mechanisms behind typhoon variability, but they seldom span the entire Holocene Epoch. Given the distinctively negative isotopic signatures of typhoon precipitation, this study examined a Holocene precipitation isotope record derived from the hydrogen isotope composition (δD) of leaf-wax n-alkanes in a lake sediment core from the South China coast to assess its potential for reflecting past typhoon activity. The reconstructed precipitation δD (δDp) values were less negative during 9.2−3.5 ka (1 ka = 1000 calendar yr B.P.) and more negative during 11.2−9.2 ka and 3.5−0 ka, showing an oscillating “negative-positive-negative” pattern. Superimposed on this pattern were millennial-scale negative excursions coinciding with North Atlantic Bond events. Unlike typical East Asian monsoon stalagmite δ18O records, we demonstrate that our δDp record reflects regional typhoon activity at millennial and multi-millennial time scales. It is likely that a weaker Atlantic Meridional Overturning Circulation and larger El Niño amplitude synergistically resulted in stronger typhoon activity and thus more negative δDp values in coastal South China during the early and late Holocene, respectively, as well as during Bond events.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"33 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115911","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

Derivation of the nonlinear dependence of aeolian sand flux on wind speed 风沙通量与风速非线性关系的推导

IF 5.8 1区地球科学

Geology Pub Date : 2026-02-02 DOI: 10.1130/g53971.1

Peng Wang, Hans J. Herrmann, Ning Huang

引用次数: 0

Metal transport by magmatic volatile phases in crustal systems 地壳系统中岩浆挥发相的金属输运

IF 5.8 1区地球科学

Geology Pub Date : 2026-02-02 DOI: 10.1130/g54065.1

Austin M. Gion, Fabrice Gaillard

{"title":"Metal transport by magmatic volatile phases in crustal systems","authors":"Austin M. Gion, Fabrice Gaillard","doi":"10.1130/g54065.1","DOIUrl":"https://doi.org/10.1130/g54065.1","url":null,"abstract":"Magmatic volatile phases (MVPs) are multicomponent fluids that are a transport medium for metals being transferred from deep magmatic sources to sites of ore formation. However, the melt-to-fluid exchange of metals remains elusive because existing empirical simulations primarily address metal transport through the fate of one chemical element. We use a comprehensive thermochemical model to simulate the fractional crystallization of a silicate melt that degasses a multicomponent MVP. We show that the major and trace element abundances in MVPs formed from non-enriched magmatic systems are indistinguishable from MVPs found as fluid inclusions in mineralized and non-mineralized systems. We therefore conclude that ore formation is the consequence of repetitive intrusion-fractionation-degassing cycles common to crustal systems without pre-enriched sources, as opposed to scenarios wherein a particular or complex chemical system is required. Instead, the driving force of ore formation is a long-lived system fueled by an H2O- and Cl-bearing melt. Variations in metal signatures of fluids therefore reflect the pressure-temperature path of melt ascent and the changes in major element composition of the melt.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"15 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146115912","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

Enhanced oceanic phosphorus recycling during the Cambrian SPICE event 寒武纪SPICE事件期间海洋磷循环增强

IF 5.8 1区地球科学

Geology Pub Date : 2026-01-30 DOI: 10.1130/g54063.1

Meng Cheng, Junpeng Zhang, James D. Schiffbauer, Zihu Zhang, Haiyang Wang, Mengcun Cao, Na Li, Matthew S. Dodd, Mikaela A. Pulsipher, Thomas J. Algeo, Mingcai Hou, Chao Li

{"title":"Enhanced oceanic phosphorus recycling during the Cambrian SPICE event","authors":"Meng Cheng, Junpeng Zhang, James D. Schiffbauer, Zihu Zhang, Haiyang Wang, Mengcun Cao, Na Li, Matthew S. Dodd, Mikaela A. Pulsipher, Thomas J. Algeo, Mingcai Hou, Chao Li","doi":"10.1130/g54063.1","DOIUrl":"https://doi.org/10.1130/g54063.1","url":null,"abstract":"The late Cambrian Steptoean positive carbon isotope excursion (SPICE) coincided with the end-Marjuman trilobite extinction and an episode of global ocean euxinia. However, the mechanism that sustained euxinia for ∼2−3 m.y. remains unclear. To address this, a novel combination of carbonate-associated phosphorus (CAP) and iodine [I/(Ca + Mg)] ratios was analyzed at four sites representing a range of water depths across the central Missouri intrashelf basin. Our data demonstrate that CAP rose during the SPICE, in parallel with elevated δ13C values and expanded euxinia, indicating increased phosphate availability in the surface ocean. In contrast, I/(Ca + Mg) ratios remained low, demonstrating persistent oxygen-poor conditions in shallow seas. These characteristics can be linked to enhanced phosphorus release and recycling in the ocean due to expanded seafloor euxinia. Based on a coupled oceanic carbon-phosphorus model, we infer that elevated phosphorus levels boosted primary productivity in the surface ocean, leading to increased oxygen generation and enhanced particulate export, sustaining oceanic euxinia until the feedback was broken by rising atmospheric O2 levels. Our study highlights phosphorus recycling as a key driver of late Cambrian ocean redox instability.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"4 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089765","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

Eclogites and eclogites: Implications for Archean tectonics 榴辉岩与榴辉岩：对太古宙构造的启示

IF 5.8 1区地球科学

Geology Pub Date : 2026-01-30 DOI: 10.1130/g54337.1

Michael Brown, Sonja Aulbach, Tim Johnson

{"title":"Eclogites and eclogites: Implications for Archean tectonics","authors":"Michael Brown, Sonja Aulbach, Tim Johnson","doi":"10.1130/g54337.1","DOIUrl":"https://doi.org/10.1130/g54337.1","url":null,"abstract":"Eclogites are generally divided into two types, xenolithic (mantle) and orogenic (crustal). Xenolithic eclogites are late Archean (ca. 3.0−2.5 Ga) or Paleoproterozoic (ca. 2.1−1.7 Ga) in age and are widely interpreted to have been entrained in younger carbonated magmas as they rose through the lithospheric mantle roots of cratons. By contrast, all reliably dated orogenic eclogites are post-Archean, occurring in three periods ca. 2.2−1.7 Ga, 1.2−0.85 Ga, and &lt;0.7 Ga and are generally found in sutures or accretionary complexes. Although the absence of orogenic eclogites from Archean crust may be due to a tectonic mode dominated by plumes, paleomagnetic data from several Archean cratons indicate periods of lithospheric mobility interspersed with periods of stasis, demonstrating differential motions that require active tectonic boundaries between them. The apparent contradiction between a dominantly plume origin for cratonic crust and periods of lithospheric mobility can be reconciled if tectonic units were larger than the preserved cratonic nuclei in a tectonic mode with episodic subduction. The presence of xenolithic eclogites in the mantle roots of cratons suggests that moderate late-stage thickening was driven by convergence during a transition to global plate tectonics. By contrast, the earliest orogenic eclogites occur in sutures between cratons that form the composite continental fragments familiar to the supercontinent cycle.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"43 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089738","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

Reactivation of a transcrustal plumbing system during a rifting event (Asal Rift, Djibouti) 裂谷事件期间跨地表管道系统的重新激活（吉布提Asal裂谷）

IF 5.8 1区地球科学

Geology Pub Date : 2026-01-30 DOI: 10.1130/g53776.1

Juliette Pin, Lydéric France, Gilles Chazot, Etienne Deloule, Mohamed Ahmed Daoud, Bernard Le Gall

{"title":"Reactivation of a transcrustal plumbing system during a rifting event (Asal Rift, Djibouti)","authors":"Juliette Pin, Lydéric France, Gilles Chazot, Etienne Deloule, Mohamed Ahmed Daoud, Bernard Le Gall","doi":"10.1130/g53776.1","DOIUrl":"https://doi.org/10.1130/g53776.1","url":null,"abstract":"Magmatism plays a central role in rift dynamics, yet the structure and evolution of magma plumbing systems during continental break-up remain poorly constrained. The Afar Rift offers a rare opportunity to study active plate divergence and associated magma processes. We investigate the 1978 Ardoukoba fissural eruption in the Asal Rift, a syn-rift volcanism archetypal example and the most recent eruption in this segment of the Afar Rift system. Using a comprehensive dataset of melt inclusion and host mineral compositions, volatile contents (H2O, CO2, δD), and thermobarometry, we reconstruct the transcrustal plumbing system and track magma storage, transfer, and degassing during the eruption. Our results reveal polybaric magma recharge events destabilizing the system, triggering progressive tapping of increasingly deeper mush zones. The eruption began with shallow, evolved melts and transitioned to deeper, more primitive melts and crystal cargos. These findings offer a high-resolution view of magma dynamics during rifting and provide key constraints on the magmatic architecture of incipient oceanic spreading centers.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"104 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089747","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

Geochronological evidence for multi-stage melting in lithium-rich pegmatite formation 富锂伟晶岩多阶段熔融的年代学证据

IF 5.8 1区地球科学

Geology Pub Date : 2026-01-30 DOI: 10.1130/g54140.1

Jack E. Stirling, Anthony I.S. Kemp, Christopher M. Fisher, Dan Bevan, Steffen G. Hagemann, Cat E. Gill, Elina Kong

{"title":"Geochronological evidence for multi-stage melting in lithium-rich pegmatite formation","authors":"Jack E. Stirling, Anthony I.S. Kemp, Christopher M. Fisher, Dan Bevan, Steffen G. Hagemann, Cat E. Gill, Elina Kong","doi":"10.1130/g54140.1","DOIUrl":"https://doi.org/10.1130/g54140.1","url":null,"abstract":"The processes governing Li-enrichment of pegmatite magmas to reach spodumene saturation are debated, but recent models advocate that this is achieved by the progressive reworking of Li-rich metasedimentary rocks over several orogenic events. The Proterozoic Aileron Province of the North Australian Craton provides an opportunity to evaluate such models as it is a polydeformed terrane hosting mineralized lithium-cesium-tantalum (LCT) pegmatites. Apatite and cassiterite U-Pb magmatic crystallization ages from the Anningie Pegmatite Field define three distinct stages of pegmatite formation at 1790 Ma, 1750−1740 Ma, and 1725 Ma. These punctuated episodes of pegmatite formation align with three known tectonic events in the North Australian Craton, with supporting geochemical and isotopic data demonstrating that lithium enrichment is driven by the reworking of a Li-rich crustal protolith over multiple orogenic cycles. The Anningie Pegmatite Field represents a real-world example of multi-stage melting processes required to drive lithium enrichment in pegmatite magmas. These results afford a new window into the petrogenesis of LCT pegmatites, allowing for better geodynamic characterization and identification of more robust exploration pathfinders in Proterozoic and Phanerozoic terranes.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"62 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089737","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

Seismic wide-angle constraints on crustal thickness and structure at Ocean Drilling Program Site 1256: How typical are its features for oceanic crust? 海洋钻探项目1256点地壳厚度和结构的地震广角约束：其海洋地壳特征有多典型？

IF 5.8 1区地球科学

Geology Pub Date : 2026-01-30 DOI: 10.1130/g53824.1

Ingo Grevemeyer, Timothy J. Henstock, Milena Marjanović, Cord Papenberg, Anke Dannowski, Yuhan Li, Adam Robinson, Damon A.H. Teagle

{"title":"Seismic wide-angle constraints on crustal thickness and structure at Ocean Drilling Program Site 1256: How typical are its features for oceanic crust?","authors":"Ingo Grevemeyer, Timothy J. Henstock, Milena Marjanović, Cord Papenberg, Anke Dannowski, Yuhan Li, Adam Robinson, Damon A.H. Teagle","doi":"10.1130/g53824.1","DOIUrl":"https://doi.org/10.1130/g53824.1","url":null,"abstract":"Ocean Drilling Program Site 1256 was drilled in the Guatemala Basin, eastern Pacific Ocean, sampling superfast-spreading crust. It is one of the deepest drill holes sampling intact oceanic crust and the only site that has penetrated gabbroic rocks away from a tectonic window. Two gabbroic units were sampled at 1157 m and 1283 m below the basement. We collected seismic refraction and wide-angle reflection data across the drill site, and the resulting tomography models show that the first encountered gabbro does not mark the top of the seismic boundary between the upper (layer 2) and the lower (layer 3) crust, which we observe 500−600 m deeper. We propose that the drilled gabbroic rocks may represent either shallow intrusions or depth variations of the magma lens, marking the upper limit of a layer 2−layer 3 transition zone. Seismic tomography and wide-angle migration of mantle reflections reveal rather thin crust of 5 ± 0.2 km (i.e., ∼1.5 s two-way traveltime), being 1 km thinner than normal oceanic crust. The crustal deficit occurs solely within the lower crust. The observed thin crust distinctly differs from typical fast-spreading crust and may indicate the occurrence of a depleted mantle source. Yet, our preferred interpretation is that at superfast spreading rates of &gt;200 mm/yr, the melt transport through the mantle is too slow to provide enough melts to form 6 km of oceanic crust.","PeriodicalId":12642,"journal":{"name":"Geology","volume":"66 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146089759","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

Spectral evidence for magmatic differentiation within a martian plumbing system 火星管道系统中岩浆分异的光谱证据

IF 5.8 1区地球科学

Geology Pub Date : 2026-01-29 DOI: 10.1130/g53969.1

Bartosz Pieterek, Valerie Payré, Thomas J. Jones

引用次数: 0

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