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Magmatic faults: Challenges, progress, and possibilities 岩浆断层:挑战、进展和可能性
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.earscirev.2024.104992
Pablo H. Alasino , Katie E. Ardill , Scott R. Paterson
It is increasingly recognized that plutons are rich in magmatic structures that provide powerful tools for unraveling hypersolidus histories. However, one group of structures, magmatic faults recognized almost a century ago, has not been systematically examined thus far and is the focus of this review.
Magmatic fault styles resemble those in solid materials, encompassing a wide range of orientations, kinematics, and mechanical attributes. But unlike their sedimentary and metamorphic counterparts, studies of magmatic faults face several challenges, leading to their underrepresentation in plutonic histories. Key parameters needed to study magmatic faults include the fault orientation and timing relative to the magmatic fabric(s) in the host, the offset and kinematic styles of faulting, and the recognition of uniquely magmatic structures within the fault such as shear folding, melt migration, and deflection of magmatic fabrics to determine deformation style. The preservation of early faulting under melt-rich conditions is relatively rare and is instead biased towards conditions of higher crystallinity; even these latter faults can be hard to see unless compositional defined markers are offset across the faults.
Our synthesis to date suggests that magmatic faults are probably much more widespread than presently recognized and that the displacement of crystal mushes along these internal faults may be an effective, though commonly cryptic, mechanism for strain accommodation in magmatic columns. Heterogeneous strain in mushes can result in highly varied fault styles; however, the characteristics of different ‘fault packages’ in plutons may provide a means of evaluating causes of faulting in plutons (e.g., roof and sidewall magma crystallization, recharge and defrosting, thermal convection, emplacement, magmatic differentiation, tectonics). Studies of magmatic fault packages are in their infancy and future research should incorporate systematic, pluton-wide approaches designed to establish reliable criteria for determining the driving force(s).
人们越来越认识到,深成岩中蕴藏着丰富的岩浆结构,这些结构为揭示超固体历史提供了强有力的工具。然而,有一类结构,即近一个世纪前发现的岩浆断层,至今尚未得到系统的研究,这也是本综述的重点。岩浆断层的样式与固体材料中的断层样式类似,包括各种方向、运动学和力学属性。但与沉积和变质岩断层不同的是,岩浆断层的研究面临着一些挑战,导致它们在柱状历史中的代表性不足。研究岩浆断层所需的关键参数包括:断层的走向和相对于寄主岩浆构造的时间、断层的偏移和运动方式,以及识别断层内独特的岩浆构造,如剪切褶皱、熔融迁移和岩浆构造的偏转,以确定变形方式。我们迄今为止的综合研究表明,岩浆断层可能比目前认识到的要广泛得多,沿这些内部断层的晶体蜕变位移可能是岩浆柱应变容纳的一种有效机制,尽管这种机制通常是隐蔽的。岩浆中的异质应变可导致千差万别的断层类型;然而,岩浆柱中不同 "断层包 "的特征可为评估岩浆柱断层的成因提供一种方法(如顶板和侧壁岩浆结晶、补给和解冻、热对流、置换、岩浆分异、构造)。对岩浆断层群的研究尚处于起步阶段,今后的研究应采用系统的、覆盖整个岩浆岩的方法,以建立确定驱动力的可靠标准。
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引用次数: 0
Rainfall as a driver of post-wildfire flooding and debris flows: A review and synthesis 降雨是野火后洪水和泥石流的驱动因素:回顾与综述
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.earscirev.2024.104990
Natalie M. Collar , John A. Moody , Brian A. Ebel
The increasing threat of post-wildfire hazards creates an imperative for improved post-wildfire flooding and debris flow prediction capabilities. Because rainfall is a primary driver of predictive hydrology and debris flow initiation and inundation models, recent efforts have emphasized the need for interdisciplinary collaboration between meteorology and post-wildfire hazard science that develops more accurate rainfall estimates with longer lead times. In this work, we identified critical knowledge gaps for developing rainfall estimates and filled those gaps by reviewing recent literature and synthesizing pre-existing datasets. Gap areas were organized into the following general topics: a) rainfall intensity-duration-frequency relations, b) time-varying rainfall, c) spatially varying rainfall, and d) rainfall regimes.
Recent key research advances include the increasing availability of gridded quantitative rainfall estimates, the expanded use of distributed hydrologic and erosion models that incorporate spatial and temporal variability in rainfall, and the linking of concepts and modeling from the atmospheric and climate sciences with post-wildfire hazard science. We prototype a rainfall regime regionalization schema that captures self-similar properties of rainfall intensity (k, the maximum rainfall intensity) and temporal scaling (n, the decay rate). Our k-n relations schema could serve as a framework for organizing, interpreting, and predicting post-wildfire hydrologic and erosional responses. Finally, we summarize salient gaps for implementing spatiotemporally varying rainfall as the driver of post-wildfire hydrologic models designed to improve the prediction of flooding and debris flow hazards to the built environment for emergency managers.
野火后灾害的威胁与日俱增,因此必须提高野火后洪水和泥石流的预测能力。由于降雨量是预测性水文和泥石流引发和淹没模型的主要驱动因素,最近的工作强调了气象学和野火后危害科学之间跨学科合作的必要性,这种合作可以在更长的准备时间内开发出更精确的降雨量估计值。在这项工作中,我们确定了开发降雨量估算的关键知识缺口,并通过回顾近期文献和综合已有数据集来填补这些缺口。近期的主要研究进展包括:网格化定量降雨估测数据的可用性不断提高,包含降雨时空变化的分布式水文和侵蚀模型的使用范围不断扩大,大气和气候科学的概念和建模与火灾后危害科学的联系日益紧密。我们提出了一个降雨系统区域化模式原型,该模式捕捉了降雨强度(k,最大降雨强度)和时间缩放(n,衰减率)的自相似特性。我们的 k-n 关系模式可作为组织、解释和预测野火后水文和侵蚀反应的框架。最后,我们总结了在将时空变化的降雨量作为野火后水文模型的驱动因素方面存在的突出差距,该模型旨在为应急管理人员改进洪水和泥石流对建筑环境危害的预测。
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引用次数: 0
The Yanshanian Movement in Western Liaoning, northeastern North China Craton 华北克拉通东北部辽西燕山运动
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-16 DOI: 10.1016/j.earscirev.2024.104989
Zhiwei Song , Chenyue Liang , Franz Neubauer , Yongjiang Liu , Changqing Zheng , Bo Lin , Xuechun Xu
The Yanshanian Movement (or Yanshanian Orogeny) has been a topic of study for nearly a century, with ongoing interests. This study reviews its origin, tectonic subdivision, development and dynamic mechanisms, and associated magmatic-tectonic activity in Western Liaoning, northeastern North China Craton (NCC). By analyzing rock assemblages, petrogenesis, and magma sources of Mesozoic volcanic rocks, and combining with available data on deformation, basin formations, mineralization, and evolution of biota, we propose a new dynamic mechanism of the Yanshanian Movement in Western Liaoning, particularly during its initial stage and pulsation pattern. The initial stage (Early to Middle Jurassic, 190–165 Ma) is defined by abundant magmatism, mineralization and compressional structures, likely associated with the multi-plate (Mongol-Okhotsk, Paleo-Pacific, and Meso-Tethys) convergence around the East Asian continent. The pulsation pattern is characterized by alternating tectonic settings in the northeastern NCC during the Jurassic to Early Cretaceous, featuring stages of both compression and extension. The first N(W)–S(E) compression stage (165–160 Ma) is marked by an unconformity above the Jiulongshan/Haifanggou Formation and associated (N)E–(S)W fold-and-thrust structures, influenced by WNW-directed subduction of the Paleo-Pacific Plate (PPP) and the far-field effect of the N–S closure of the Mongol-Okhotsk Ocean (MOO). The subsequent first extension stage (160–145 Ma) is small-scale and local, dominated by NE–SW and NW–SE structural trends, with NE–SW extension indicated by magnetic lineations of granitic plutons and top-to-the-NE ductile shear zones in the northern NCC, likely correlating with short-term stress relaxation from the MOO regime. This NW–SE extension is confirmed by the Late Jurassic basin-and-range-type tectonics in the northeastern NCC, possibly linked to the localized high-angle subduction and rollback of the PPP. The second N(W)–S(E) compression stage (145–135 Ma) corresponds to the Yanshanian B-episode, illustrated by the syn-tectonic deposition and the unconformity from Upper Jurassic to lowermost Cretaceous. The NE–SW-trending compressional structures were controlled by rapid low-angle NNW-directed subduction of the PPP, alongside with subordinate E–W-trending structures associated with the final N–S closure of the MOO. The following second NW–SE extension in the late Early Cretaceous (135–100 Ma) is recorded by metamorphic core complexes, extensional domes and rift basins, and large-scale magmatic-tectonic activity, driven by asthenospheric material upwelling, lithospheric delamination, and thinning of the NCC lithosphere due to the rapid retreat and rollback of the PPP.
近一个世纪以来,燕山运动(或燕山造山运动)一直是人们关注的研究课题。本研究综述了燕山运动的起源、构造分区、发展与动力机制,以及与之相关的华北克拉通(NCC)东北部辽西地区的岩浆构造活动。通过分析中生代火山岩的岩石组合、岩石成因和岩浆来源,并结合变形、盆地构造、成矿作用和生物群演化等方面的现有资料,我们提出了辽西燕山运动的新的动力机制,特别是其初始阶段和脉动模式。初始阶段(早侏罗世至中侏罗世,190-165 Ma)以丰富的岩浆活动、矿化和压缩构造为特征,可能与东亚大陆周围的多板块(蒙古-奥霍次克板块、古太平洋板块和中特提斯板块)汇聚有关。脉动模式的特点是,在侏罗纪至早白垩世期间,东北NCC地区的构造背景交替变化,既有压缩阶段,也有延伸阶段。第一个北(西)-南(东)压缩阶段(165-160 Ma)的特征是九龙山/海房沟地层上方的不整合以及相关的(北)-东(南)-西褶皱-推覆构造,这是受古太平洋板块(PPP)向西北方向俯冲以及蒙古-奥霍次克洋(MOO)向北-南闭合的远场效应的影响。随后的第一扩展阶段(160-145 Ma)规模较小,以局部为主,主要是东北-西南和西北-东南的构造趋势,花岗质岩块的磁力线和北部 NCC 自上而下向东北的韧性剪切带显示了东北-西南的扩展,这可能与 MOO 体系的短期应力松弛有关。侏罗纪晚期东北部的盆地-范围型构造证实了这种西北-东南延伸,这可能与局部的高角度俯冲和PPP的后退有关。第二个N(W)-S(E)压缩阶段(145-135 Ma)与燕山B期相对应,表现为同步构造沉积和上侏罗世至白垩纪下统的不整合。NE-SW向的压缩构造是由PPP快速低角度NNW向俯冲控制的,同时还有与MOO最终N-S闭合相关的从属E-W向构造。随后在早白垩世晚期(135-100 Ma)发生的第二次NW-SE向延伸由变质岩核复合体、延伸穹窿和裂谷盆地以及大规模岩浆构造活动所记录,其驱动力是天体层物质上涌、岩石圈分层以及PPP快速退缩和回滚导致的NCC岩石圈变薄。
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引用次数: 0
Metallogeny of Late Paleozoic lode gold mineralization of western Tien Shan: From orogenic shortening to intracontinental strike-slip shearing 天山西部晚古生代矿床金矿的成矿作用:从造山运动的缩短到大陆内部的走向-剪切作用
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-12 DOI: 10.1016/j.earscirev.2024.104983
Xiaobo Zhao , Chunji Xue , Reimar Seltmann , Weice Zhao , Guoxiong Ma , Bakhtiar Nurtaev , Rustam Mirkamalov , Nikolay Pak
<div><div>Extending eastward from the Kyzylkum desert of Uzbekistan, through Tajikistan, Kyrgyzstan and continuing into western China, the late Paleozoic Tien Shan orogen in the southwestern Central Asia Orogenic Belt (CAOB) hosts one of the world's richest gold provinces. The >10,000-metric ton (t) gold endowment of the Tien Shan province occurs within lode gold deposits, which have been variably classified as Kyzylkum-type, mesothermal, orogenic or intrusion-related. The metallogeny of the Late Paleozoic lode gold mineralization in the Tien Shan province comprises two distinct episodes related to the accretionary evolution of the western CAOB. The initial 325 to 305 Ma mineralizing episode is interpreted to be related to regional orogenic shortening and associated contractional deformation during terminal subduction of the Turkestan Ocean. This episode resulted in the formation of sheeted auriferous veins, veinlets and stockworks that are controlled by thrust-related brittle fault systems and associated fracture networks (e.g., Unkurtash and Katebasu). The subsequent 290 to 280 Ma metallogenic episode is the most regionally extensive. It produced some of the world's largest gold accumulations (e.g., Muruntau, Kumtor, Zarmitan etc.) that account at present for more than 97 % of the bulk gold resources of the province. This episode is interpreted to be the product of widespread intracontinental strike-slip shearing that immediately followed the amalgamation between the Tarim–Karakum cratons and the Kazakhstan–Yili–Central Tianshan terranes. Mineralization of this latter episode is generally controlled by ductile shearing with predominantly shear-hosted and fracture-filled gold-bearing veins. Lode gold deposits of the Tien Shan show some unique characteristics compared to typical orogenic or intrusion-related gold deposits. The gold lodes are hosted by Proterozoic–Paleozoic metamorphic carbonaceous flysch and/or <em>syn</em>- or post-collisional granitoids. Hydrothermal alteration associations display diversity that depends upon the varying crustal level of the gold mineralization and its spatial distance from granitoid intrusions. The H-O-C and He<img>Ar isotope ratios suggest a dominantly metamorphic fluid with variable contribution of magmatic water and/or mantle-derived deep fluids in a medium-temperature, CO<sub>2</sub>-rich, low-salinity H<sub>2</sub>O–CO<sub>2</sub>–NaCl system. Available geological, sulfur and lead isotope data indicate multiple potential sources for the ore metals and their source reservoir that include metamorphic carbonaceous flysch, granitoid intrusions or the deep mantle. Compilation of apatite fission track (AFT) data suggests that the western segment of the Tien Shan in Central Asia underwent less extensive post-ore exhumation, whereas its eastern segment in China was subjected to a more complex and prolonged exhumation history. Post-ore differential uplifting and exhumation played an important role in forming th
中亚造山带(CAOB)西南部的晚古生代天山造山带从乌兹别克斯坦的克孜勒库姆沙漠向东延伸,穿过塔吉克斯坦、吉尔吉斯斯坦,一直延伸到中国西部,是世界上最富饶的金矿区之一。天山金矿储量达 10,000 公吨,主要分布在原生金矿床中,可分为 Kyzylkum 型、中温型、造山型或侵入型。天山省晚古生代金矿床的成矿作用由两个不同的阶段组成,与西部CAOB的增生演化有关。据解释,最初的325至305Ma成矿期与突厥斯坦洋末期俯冲过程中的区域造山缩短和相关收缩变形有关。这一时期形成了片状含金矿石的矿脉、小矿脉和堆积物,这些矿脉、小矿脉和堆积物受到与推力有关的脆性断层系统和相关断裂网络(如 Unkurtash 和 Katebasu)的控制。随后的 290 至 280 Ma 金属成矿期是区域范围最广的时期。它产生了一些世界上最大的金矿(如穆伦陶、库姆托尔、扎尔米丹等),目前占该省大宗金资源的 97% 以上。据解释,这一时期是塔里木-卡拉库姆地块与哈萨克斯坦-伊犁-中天山地块汞齐化之后大陆内部广泛的走向-滑动剪切作用的产物。后一阶段的成矿作用一般受韧性剪切的控制,主要是剪切赋存和裂隙充填的含金矿脉。与典型的造山型或侵入型金矿床相比,天山的金矿床显示出一些独特的特征。金矿床赋存于新生代-古生代变质碳质飞沙岩和/或同步或碰撞后花岗岩中。热液蚀变关联显示出多样性,这取决于金矿化的不同地壳水平及其与花岗岩侵入体的空间距离。H-O-C和HeAr同位素比率表明,在一个中温、富含二氧化碳、低盐度的H2O-CO2-NaCl系统中,以变质流体为主,岩浆水和/或地幔衍生的深层流体的作用各不相同。现有的地质、硫和铅同位素数据表明,矿石金属及其源储层有多种潜在来源,包括变质碳质萤石、花岗岩侵入体或深地幔。磷灰石裂变轨迹(AFT)数据汇编表明,中亚天山西段经历了较小范围的矿后掘起,而中国天山东段则经历了更为复杂和漫长的掘起历史。矿后差异隆升和掘起在形成天山金省不同地段的异质禀赋方面发挥了重要作用。
{"title":"Metallogeny of Late Paleozoic lode gold mineralization of western Tien Shan: From orogenic shortening to intracontinental strike-slip shearing","authors":"Xiaobo Zhao ,&nbsp;Chunji Xue ,&nbsp;Reimar Seltmann ,&nbsp;Weice Zhao ,&nbsp;Guoxiong Ma ,&nbsp;Bakhtiar Nurtaev ,&nbsp;Rustam Mirkamalov ,&nbsp;Nikolay Pak","doi":"10.1016/j.earscirev.2024.104983","DOIUrl":"10.1016/j.earscirev.2024.104983","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Extending eastward from the Kyzylkum desert of Uzbekistan, through Tajikistan, Kyrgyzstan and continuing into western China, the late Paleozoic Tien Shan orogen in the southwestern Central Asia Orogenic Belt (CAOB) hosts one of the world's richest gold provinces. The &gt;10,000-metric ton (t) gold endowment of the Tien Shan province occurs within lode gold deposits, which have been variably classified as Kyzylkum-type, mesothermal, orogenic or intrusion-related. The metallogeny of the Late Paleozoic lode gold mineralization in the Tien Shan province comprises two distinct episodes related to the accretionary evolution of the western CAOB. The initial 325 to 305 Ma mineralizing episode is interpreted to be related to regional orogenic shortening and associated contractional deformation during terminal subduction of the Turkestan Ocean. This episode resulted in the formation of sheeted auriferous veins, veinlets and stockworks that are controlled by thrust-related brittle fault systems and associated fracture networks (e.g., Unkurtash and Katebasu). The subsequent 290 to 280 Ma metallogenic episode is the most regionally extensive. It produced some of the world's largest gold accumulations (e.g., Muruntau, Kumtor, Zarmitan etc.) that account at present for more than 97 % of the bulk gold resources of the province. This episode is interpreted to be the product of widespread intracontinental strike-slip shearing that immediately followed the amalgamation between the Tarim–Karakum cratons and the Kazakhstan–Yili–Central Tianshan terranes. Mineralization of this latter episode is generally controlled by ductile shearing with predominantly shear-hosted and fracture-filled gold-bearing veins. Lode gold deposits of the Tien Shan show some unique characteristics compared to typical orogenic or intrusion-related gold deposits. The gold lodes are hosted by Proterozoic–Paleozoic metamorphic carbonaceous flysch and/or &lt;em&gt;syn&lt;/em&gt;- or post-collisional granitoids. Hydrothermal alteration associations display diversity that depends upon the varying crustal level of the gold mineralization and its spatial distance from granitoid intrusions. The H-O-C and He&lt;img&gt;Ar isotope ratios suggest a dominantly metamorphic fluid with variable contribution of magmatic water and/or mantle-derived deep fluids in a medium-temperature, CO&lt;sub&gt;2&lt;/sub&gt;-rich, low-salinity H&lt;sub&gt;2&lt;/sub&gt;O–CO&lt;sub&gt;2&lt;/sub&gt;–NaCl system. Available geological, sulfur and lead isotope data indicate multiple potential sources for the ore metals and their source reservoir that include metamorphic carbonaceous flysch, granitoid intrusions or the deep mantle. Compilation of apatite fission track (AFT) data suggests that the western segment of the Tien Shan in Central Asia underwent less extensive post-ore exhumation, whereas its eastern segment in China was subjected to a more complex and prolonged exhumation history. Post-ore differential uplifting and exhumation played an important role in forming th","PeriodicalId":11483,"journal":{"name":"Earth-Science Reviews","volume":"259 ","pages":"Article 104983"},"PeriodicalIF":10.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655605","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
Reassessing metamorphic core complexes in the North American Cordillera 重新评估北美科迪勒拉山系的变质核心复合体
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-12 DOI: 10.1016/j.earscirev.2024.104987
Andrew V. Zuza , Gilby Jepson , Wenrong Cao
Continental metamorphic core complexes (MCCs) are widely distributed on Earth, primarily exposed at convergent plate margins. These structural systems involve the exhumation of metamorphosed, commonly migmatitic, middle-lower crust rocks along high-strain mylonitic shear zones to the brittle upper crust. However, the extent to which the brittle faults, ductile shear zones, and syn-kinematic igneous rocks are genetically and kinematically related within MCCs remains inadequately understood. To address this, we synthesize structural, geochronological, thermochronological, sedimentological, and petrological observations from MCCs distributed across the strike-length of the North American Cordillera. We show that Paleogene ductile MCC exhumation tracked via medium-to-high temperature thermochronology (i.e., biotite and muscovite 40Ar/39Ar dates) and cross-cutting relationships youngs toward the central Cordillera latitudes (∼37°N), whereas predominately Miocene brittle faulting and syn-kinematic basin formation youngs northward from the south. Ductile MCC exhumation age trends parallel magmatic sweeps associated with rollback of the Farallon slab, whereas brittle extensional faulting trends correlate with the northward migration of the Mendocino triple junction and the initiation of Basin and Range extension. In light of these observations, we argue that MCCs in the North American Cordillera were not the result of a single phase of extension, but rather reflect two decoupled stages including an early phase of buoyant diapirism followed by a later phase of lithospheric extension. The diapirism ocurred as a Rayleigh-Taylor instability due to crustal melting driven by asthenospheric influx during slab rollback and coupled magmatism. Later, lithospheric extension was caused by regional gravitational relaxation due to change of plate boundary kinematics. This synthesis demonstrates the complexities of MCC generation and highlights the need for better dating constraints for both brittle and ductile structures to make improved interpretations of MCCs globally.
大陆变质核复合体(MCCs)在地球上分布广泛,主要暴露在板块汇聚的边缘。这些构造系统涉及变质的中下地壳岩石(通常为偏闪长岩)沿着高应变的麦饭石剪切带向脆性上地壳的掘进。然而,人们对脆性断层、韧性剪切带和同步运动火成岩在MCC内部的遗传和运动关系的了解仍然不足。为了解决这个问题,我们综合了分布在北美科迪勒拉山系全长的MCCs的构造、地质年代学、热时学、沉积学和岩石学观察结果。我们表明,通过中高温热时学(即生物橄榄石和白云母 40Ar/39Ar 年代)和横切关系追踪的古新世韧性MCC掘起向科迪勒拉山系中部纬度(∼37°N)年轻化,而主要是中新世脆性断裂和同步构造盆地形成从南部向北年轻化。韧性MCC掘出的年龄趋势与法拉隆板块回滚相关的岩浆扫描平行,而脆性延伸断层的趋势则与门多西诺三交界处的北移以及盆地和山脉延伸的开始相关。根据这些观察结果,我们认为北美科迪勒拉山系的 MCCs 并非单一阶段延伸的结果,而是反映了两个互不关联的阶段,包括早期的浮力减斜阶段和后期的岩石圈延伸阶段。在板块回滚和耦合岩浆作用过程中,天体层涌入导致地壳熔化,从而引发了雷利-泰勒不稳定性。后来,板块边界运动学的变化导致区域重力松弛,从而引起岩石圈延伸。这一综述表明了MCC生成的复杂性,并强调需要对脆性和韧性结构进行更好的年代测定,以改进对全球MCC的解释。
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引用次数: 0
Precambrian tectonic evolution of the Qaidam block, northern Tibet: Implications for the assembly and breakup of Proterozoic supercontinents 藏北柴达木区块的前寒武纪构造演化:对新生代超大陆组装和解体的影响
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-09 DOI: 10.1016/j.earscirev.2024.104985
Chen Wu , Jie Li , Wenyou Liu , Andrew V. Zuza , Peter J. Haproff , Lin Ding
The nature of Precambrian metamorphic basement rocks and overall tectonic evolution of the Qaidam block in northern Tibet remains debated despite being important to understanding the assembly of Asia. Paleogeographic reconstructions of Precambrian supercontinents rarely consider Phanerozoic tectonic modification of its constituent Precambrian blocks. This issue is particularly relevant for the Qaidam block and its neighboring crustal fragments, which experienced significant Phanerozoic overprinting from multiple tectonic episodes. To address this problem, we systematically reviewed key geological observations and regional datasets related to Proterozoic magmatism, metamorphism, and sedimentation of major Precambrian blocks in China. This synthesis provided new constraints on the Proterozoic tectonic evolution of the Qaidam block, including paleogeographic supercontinent configurations and nature of multiple continental-drift-collision events. New results of field mapping, geochronological, and geochemical analyses allow us to divide the Precambrian rocks of the Qaidam block into four divisions: (1) Paleoproterozoic gneiss and schist; (2) Meso- and (3) Neoproterozoic metasedimentary rocks; and (4) Proterozoic intrusions. We propose that the Qaidam block was part of a “Greater North China” block, which experienced early Paleoproterozoic post-collisional extension and continental collision along the Paleoproterozoic Northern Margin orogen to form the Columbia-Nuna supercontinent. The Greater North China block subsequently experienced Mesoproterozoic extension related to supercontinent breakup. In addition, we propose that the Greater North China block was affixed to the western margin of Laurentia and Siberia as part of Rodinia in the Neoproterozoic, rifted in the late Neoproterozoic, and drifted in the early Paleozoic as a series of microcontinents.
尽管前寒武纪变质基底岩石的性质和藏北柴达木地块的整体构造演化对了解亚洲的形成非常重要,但仍存在争议。前寒武纪超大陆的古地理重建很少考虑其组成的前寒武纪地块的新生代构造变化。这一问题与盖达姆区块及其邻近的地壳碎片尤为相关,它们经历了多个构造事件造成的新生代显著叠压。为了解决这个问题,我们系统地回顾了与中国主要前寒武纪地块的新生代岩浆作用、变质作用和沉积作用有关的主要地质观测资料和区域数据集。这一综述为柴达木区块的新生代构造演化提供了新的约束条件,包括古地理超大陆配置和多次大陆漂移碰撞事件的性质。实地测绘、地质年代和地球化学分析的新成果使我们能够将盖达姆区块的前寒武纪岩石分为四类:(1) 古新生代片麻岩和片岩;(2) 中新生代和 (3) 新新生代变质岩;(4) 新生代侵入体。我们认为,柴达木区块是 "大华北 "区块的一部分,该区块经历了早古生代后碰撞延伸和大陆碰撞,沿早古生代北缘造山带形成了哥伦比亚-努纳超大洲。大华北地块随后经历了与超大陆解体有关的中新生代延伸。此外,我们还提出,大华北地块在新元古代作为罗迪尼亚的一部分贴附在劳伦提亚和西伯利亚的西缘,在新元古代晚期发生断裂,并在古生代早期漂移为一系列微大陆。
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引用次数: 0
Biostabilization: Parameterizing the interactions between microorganisms and siliciclastic marine sediments 生物稳定:微生物与硅质海洋沉积物之间相互作用的参数化
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-07 DOI: 10.1016/j.earscirev.2024.104976
Brette S. Harris, Kelly J. Rozanitis, Bruce Sutherland, Paul G. Myers, Kurt O. Konhauser, Murray K. Gingras
Microbial mats have existed for much of Earth's history. They represent some of the earliest evidence of life, are essential in biogeochemical cycles, and played a pivotal role in oxygenating the atmosphere. In addition, benthic microbiota impact sediment properties by enhancing the cohesion and stability of the substratum, a process known as ‘biostabilization’, which affects sediment dynamics and rheology. A substantial body of research has focused on experimentally quantifying biostabilization in siliciclastic sediments. This review compiles and synthesizes these studies in order to facilitate comparison of results. They, in turn, are compared with; (1) the Shields' diagram, (2) shear stress values in shallow marine environments, and (3) occurrences of microbially induced sedimentary structures in the marine stratigraphic record. The findings reveal significant variability in outcomes, with increases in the Shields' Parameter ranging from 0.1 to 4 orders of magnitude. They also demonstrate that high-energy hydrodynamic conditions, such as those above fairweather wave base, inhibit microbial colonization. Additionally, the review briefly discusses two applications of the data: (1) refining models of the Great Oxidation Event, and (2) evaluating microbial biostabilization as a response to increased coastal erosion driven by climate change.
在地球历史的大部分时间里,微生物垫一直存在。它们代表了生命最早的证据,在生物地球化学循环中至关重要,并在为大气充氧方面发挥着关键作用。此外,底栖微生物群通过增强底质的内聚力和稳定性来影响沉积物的性质,这一过程被称为 "生物稳定化",会影响沉积物的动力学和流变学。大量研究都集中在通过实验量化硅质沉积物中的生物稳定性。本综述对这些研究进行了汇编和综合,以便于对结果进行比较。这些研究结果又与以下方面进行了比较:(1) 希尔兹图,(2) 浅海环境中的剪应力值,(3) 海洋地层记录中出现的微生物诱导沉积结构。研究结果揭示了结果的巨大差异,希尔兹参数的增加幅度从 0.1 个数量级到 4 个数量级不等。研究还表明,高能流体动力条件(如风浪基底以上的条件)会抑制微生物的定殖。此外,综述还简要讨论了数据的两个应用领域:(1) 完善大氧化事件的模型,(2) 评估微生物生物稳定对气候变化引起的海岸侵蚀加剧的响应。
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引用次数: 0
Incorporating cross-scale insights into colloid-facilitated radionuclide transport in fractured rocks: A critical review 将跨尺度见解纳入胶体促进的放射性核素在断裂岩石中的迁移:重要综述
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-07 DOI: 10.1016/j.earscirev.2024.104974
Funing Ma , Zhenxue Dai , Xiaoying Zhang , Fangfei Cai , Weiliang Wang , Yong Tian , Shangxian Yin , Yue Ma , Dayong Wang , Mohamad Reza Soltanian , Longcheng Liu , Paul Reimus
Driven by the global imperative for the geological disposal of high-level radioactive waste (HLW), notable progress has been made in predicting radionuclide transport within fractured rocks. Current research has recognized that the presence of colloids may significantly influence radionuclide transport. However, challenges remain in understanding and quantifying this process from a multi-scale perspective. This review provides a comprehensive overview of recent developments in understanding the role of colloids in facilitating radionuclide transport in multi-scale fractured rocks. We first revisit the fundamental characteristics and processes controlling the transport of colloids and radionuclides in fractured rocks, including the properties of fractured rocks, colloids, and radionuclides, as well as their complex interactions. Furthermore, we discuss recent advancements in lab- and field-scale experiments and modeling techniques that shed light on the mechanisms controlling colloid-facilitated radionuclide transport. The focus then shifts to scaling issues, including scale-dependent transport processes and parameters, as well as the upscaling theories that bridge the gap between lab-scale experiments and field-scale assessments. Finally, we identify unresolved problems and promising development trends in colloid-facilitated radionuclide transport, which offer new opportunities for enhancing the accuracy of long-term safety assessments in HLW geological repositories.
在全球对高放射性废物(HLW)进行地质处置的迫切需要的推动下,在预测放射性核素在断裂岩石中的迁移方面取得了显著进展。目前的研究已经认识到,胶体的存在可能会显著影响放射性核素的迁移。然而,从多尺度角度理解和量化这一过程仍面临挑战。本综述全面概述了了解胶体在促进多尺度断裂岩石放射性核素迁移方面作用的最新进展。我们首先重温了控制胶体和放射性核素在断裂岩石中迁移的基本特征和过程,包括断裂岩石、胶体和放射性核素的特性,以及它们之间复杂的相互作用。此外,我们还讨论了实验室和野外规模实验及建模技术的最新进展,这些技术揭示了胶体促进放射性核素迁移的控制机制。然后,我们将重点转向尺度问题,包括与尺度相关的迁移过程和参数,以及缩小实验室尺度实验与实地尺度评估之间差距的放大理论。最后,我们确定了胶体促进放射性核素迁移方面尚未解决的问题和有前景的发展趋势,这些问题和趋势为提高高放射性废物地质处置库长期安全评估的准确性提供了新的机遇。
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引用次数: 0
Fate of ‘forever chemicals’ in the global cryosphere 全球冰冻圈中 "永久化学品 "的命运
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-07 DOI: 10.1016/j.earscirev.2024.104973
Yunqiao Zhou , Xiaoping Wang , Chuanfei Wang , Zhiwei Ji , Xuerui Niu , Huike Dong
The cryosphere serves as a significant sink in the global circulation of organic pollutants. Among them, per- and polyfluoroalkyl substances (PFAS), known as “forever chemical”, are of great concern as their concentrations surpass the Earth's planetary safety boundary. In this review, we synthesize knowledge on the fate of PFAS in the cryosphere, focusing on their sources, accumulation, release process, and ecological effects. Long-range atmospheric transport leads to widespread of PFAS in the cryosphere, whereas local activities are primarily responsible for the regional PFAS pollution. Because of the wide replacements of the ozone-depleting chlorofluorocarbons after the Montreal Protocol, the ultra-short chain (C < 4) PFAS, particularly trifluoroacetic acid, have emerged as the predominant compounds in the cryosphere, which may become a focus of future research. Cryospheric components such as snowfall, sea ice, and permafrost are important accumulation reservoirs of PFAS, while under climate warming, air-snow exchange, sea-ice melting and permafrost thaw lead to redistribution of PFAS. During snow/ice melt, short-chain PFAS are released earlier than long-chain PFAS. The PFAS remaining in the proglacial environment exhibit a range of ecological effects on both micro- and higher trophic organisms through the food web, ultimately leading to biodiversity loss. Our analysis shed light on the fate of PFAS in the cryosphere under climate warming and highlighted the urgent need for their long-term monitoring and study of PFAS in glacial regions to protect the fragile ice world.
冰冻圈是有机污染物全球循环的一个重要汇。其中,被称为 "永远的化学物质 "的全氟烷基和多氟烷基物质(PFAS)因其浓度超过地球的安全边界而备受关注。在这篇综述中,我们总结了有关 PFAS 在冰冻圈中归宿的知识,重点关注其来源、积累、释放过程和生态效应。长程大气传输导致 PFAS 在冰冻圈中广泛存在,而本地活动则是造成区域性 PFAS 污染的主要原因。由于《蒙特利尔议定书》签署后消耗臭氧的氯氟烃被广泛替代,超短链(C < 4)PFAS,尤其是三氟乙酸,已成为冰冻圈中的主要化合物,可能成为未来研究的重点。降雪、海冰和永久冻土等冰冻层成分是全氟辛烷磺酸的重要积累库,而在气候变暖的情况下,气雪交换、海冰融化和永久冻土解冻会导致全氟辛烷磺酸的重新分布。在冰雪融化过程中,短链全氟辛烷磺酸的释放早于长链全氟辛烷磺酸。残留在冰川环境中的全氟辛烷磺酸会通过食物网对微营养级和高营养级生物产生一系列生态影响,最终导致生物多样性丧失。我们的分析揭示了气候变暖条件下全氟辛烷磺酸在冰冻圈中的归宿,并强调迫切需要对冰川地区的全氟辛烷磺酸进行长期监测和研究,以保护脆弱的冰雪世界。
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引用次数: 0
Hydrogen-induced mineral alteration: A review in the context of underground hydrogen storage (UHS) in saline aquifers 氢诱导的矿物蚀变:含盐含水层地下储氢(UHS)综述
IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2024-11-06 DOI: 10.1016/j.earscirev.2024.104975
Heather Braid , Kevin Taylor , Edward Hough , Chris Rochelle , Vahid Niasar , Lin Ma
Hydrogen is considered a viable energy vector, it can be produced through the electrolysis of water and stored as a gaseous phase in the subsurface. Hydrogen storage in saline aquifers is not yet commercially operational, to increase the technological readiness, the complex interactions between rock, pore fluid, and hydrogen under reservoir conditions (increased pressure and temperature) need thorough understanding. It is acknowledged that abiotic geochemical reactions are a potential barrier for UHS as hydrogen is an electron donor and can form highly reactive hydrogen ions. Using a comparative approach, this study reviews the current disparity in the literature regarding the impacts and extents of hydrogen-induced abiotic reactions, to identify knowledge gaps requiring further investigation. Data from both experimental and modelled methods are summarised in relation to individual minerals, common in the subsurface, and their implications to efficiency and security of underground hydrogen storage. This review demonstrates a significant agreement concerning the lack of reaction between hydrogen and rock-forming silicate minerals, and a strong likelihood that under reservoir conditions (heightened temperature and pressure) hydrogen can reduce pyrite to pyrrhotite. It also reveals compelling evidence suggesting exposure to hydrogen can lead to the dissolution of sulphates (anhydrite) and carbonates (calcite). We conclude development of future hydrogen storage projects in saline aquifers should therefore focus on silicate-rich formations. And further work is needed to establish a clear understanding of extents and rates of potential mineral reactions to ensure storage security and efficiency in future projects.
氢被认为是一种可行的能源载体,它可以通过电解水产生,并以气态形式储存在地下。在含盐含水层中储存氢气尚未投入商业运营,为了提高技术准备程度,需要深入了解在储层条件(压力和温度升高)下岩石、孔隙流体和氢气之间复杂的相互作用。人们认识到,非生物地球化学反应是超高压制氢的潜在障碍,因为氢是一种电子供体,可形成高活性氢离子。本研究采用比较的方法,回顾了目前文献中关于氢引起的非生物反应的影响和范围的差异,以确定需要进一步研究的知识差距。研究总结了实验和模拟方法得出的与地下常见的个别矿物有关的数据,以及它们对地下储氢的效率和安全性的影响。该综述表明,氢与岩石硅酸盐矿物之间缺乏反应的观点非常一致,而且在储层条件(温度和压力升高)下,氢很有可能将黄铁矿还原成黄铁矿。它还揭示了令人信服的证据,表明暴露在氢气中会导致硫酸盐(无水石膏)和碳酸盐(方解石)的溶解。因此,我们得出结论,未来在含盐含水层中开发储氢项目应重点关注富含硅酸盐的地层。还需要进一步开展工作,明确了解潜在矿物反应的范围和速率,以确保未来项目的储氢安全和效率。
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