Global and Planetary Change最新文献_第4页

Multi-scale pattern analysis of permafrost dynamics on the Qinghai–Tibet Plateau based on machine-learning reconstruction 基于机器学习重建的青藏高原冻土动态多尺度格局分析

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-28 DOI: 10.1016/j.gloplacha.2026.105341

Peng Jiang , Kunqi Ding , Jiaying Ni , Rongrong Zhang , Peng Shi , Qin Ju , Bin Yang , Zhongbo Yu

The accelerating degradation of permafrost on the Qinghai–Tibet Plateau (QTP) is a critical driver of regional and global climate change. However, conventional models often limit our understanding by overlooking thermal memory and failing to deconstruct complex spatial dynamics. This study introduces a novel diagnostic framework that pairs a thermal-memory-aware machine learning model with a multi-scale spatiotemporal analysis system to overcome these limitations. Our reconstruction from 1960 to 2020 reveals that the total permafrost area shrank by approximately 16% from its peak, while the mean active layer thickness (ALT) deepened, with degradation accelerating sharply after the 1980s. Vertically, we identify a systematic misalignment between the elevation of maximum permafrost stability (peak area) and maximum thermal sensitivity (peak ALT), the magnitude of which serves as a robust indicator of basin-scale vulnerability. Horizontally, we reveal a critical spatiotemporal mismatch: the geometric centroid of the permafrost area remains relatively stable, while its thermal center of mass exhibits large, volatile oscillations. This decoupling is driven by the contrast between rapid degradation at the warm, wet margins and the anchoring effect of the vast thermal inertia in the cold, arid core. Ultimately, our study reveals that permafrost degradation is a complex, multi-scale process rather than a uniform retreat. The diagnostic framework and the identified spatiotemporal decoupling provide a new perspective for assessing the stability and vulnerability of cryospheric systems in a warming world.

青藏高原冻土加速退化是区域和全球气候变化的重要驱动因素。然而，传统的模型往往由于忽视热记忆和未能解构复杂的空间动力学而限制了我们的理解。本研究引入了一种新的诊断框架，该框架将热记忆感知机器学习模型与多尺度时空分析系统相结合，以克服这些限制。从1960年到2020年的重建结果显示，多年冻土面积比峰值减少了约16%，平均活动层厚度（ALT）加深，并在20世纪80年代后急剧加速退化。在垂直方向上，我们确定了最大永久冻土稳定性（峰值面积）和最大热敏感性（峰值ALT）之间的系统性偏差，其大小可作为流域尺度脆弱性的有力指标。在水平上，我们揭示了一个关键的时空不匹配：多年冻土区的几何质心保持相对稳定，而其热质心表现出较大的挥发性振荡。这种分离是由温暖潮湿边缘的快速退化和寒冷干旱核心的巨大热惯性的锚定效应之间的对比所驱动的。最终，我们的研究表明，永久冻土退化是一个复杂的、多尺度的过程，而不是一个统一的退缩。诊断框架和确定的时空解耦为评估变暖世界中冰冻圈系统的稳定性和脆弱性提供了新的视角。

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引用次数: 0

Corrigendum to “Aptian sequences, sea-level, siliciclastic flux and climate change in the Neo-Tethys domain (Tunisia, N. Spain and S. France)” Global and Planetary Change 255 (2025) 105049 “新特提斯地区（突尼斯、西班牙北部和法国南部）的Aptian序列、海平面、硅质通量和气候变化”全球与行星变化255 (2025)105049

IF 3.9 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-27 DOI: 10.1016/j.gloplacha.2026.105330

Najeh Ben Chaabane, Jihede Haj Messaoud, Fares Khemiri, Frans van Buchem

引用次数: 0

Persistence and resilience on Mount Etna's active flank: An integrated geological and archaeological perspective 埃特纳火山活动侧面的持久性和弹性：综合地质和考古视角

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-26 DOI: 10.1016/j.gloplacha.2026.105327

Carla Bottari , Alessandro Luppino , Salvatore Claudio Alparone , Francesca Forni , Gianluca Groppelli , Mimmo Palano , Francesco Sortino , Salvatore Giammanco

Volcanic environments illustrate how human communities have learned to persist within dynamic, hazardous landscapes by balancing risk and opportunity. Mount Etna (Sicily, Italy) – one of the world's most active volcanoes – provides an outstanding natural laboratory to investigate the interplay between geodynamic and volcanic processes as well as human adaptation. The site of Santa Venera al Pozzo (SVP) exemplifies this duality: archaeological and geological evidence reveal a persistent human presence since the Late Neolithic, sustained by fault-controlled hydrothermal discharge and a geomorphological position that ensured long-term stability outside major lava flow pathways.

This study integrates geological, geochemical, geodetic, seismological, and archaeological data to examine how tectonic and magmatic processes sustained hydrothermal activity and supported enduring settlement. Results indicate that (i) deformation was largely accommodated by creeping faults, in turn enhancing permeability and maintaining spring discharge; (ii) the site's distal position from eruptive rift zones provided geomorphological stability; and (iii) cultural practices promoted the adaptive reuse of geothermal resources over the time.

The case of SVP demonstrates that the same Earth processes generating hazards also maintain vital resources, enabling long-term human resilience. This integrated geological–archaeological perspective provides a transferable framework for understanding sustainability and risk in volcanically active regions worldwide.

火山环境说明了人类社会如何通过平衡风险和机遇，学会在动态的、危险的景观中生存。埃特纳火山（意大利西西里岛）是世界上最活跃的火山之一，为研究地球动力学和火山过程以及人类适应之间的相互作用提供了一个杰出的自然实验室。Santa Venera al Pozzo遗址（SVP）体现了这种两重性：考古和地质证据表明，自新石器时代晚期以来，人类一直存在，由断层控制的热液排放和确保主要熔岩流路径外长期稳定的地貌位置维持了人类的存在。

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引用次数: 0

Enhanced temperature fluctuations accelerate erosion in the Yarlung Catchment, South Tibet 温度波动加剧加速了藏南雅鲁藏布江流域的侵蚀

IF 3.9 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-26 DOI: 10.1016/j.gloplacha.2026.105331

Dongxu Cai, Guangwei Li, Yufeng Du, Paul R. Eizenhöfer, Xianyan Wang

The erosional response of mid-latitudinal mountain belts to Quaternary climate fluctuations remains incompletely understood, particularly in the Himalayas. Although tectonics and the monsoon are recognized as primary drivers of denudation there, limited high-resolution paleo-erosion records leave the Quaternary climate's impact uncertain. Here, we utilize new detrital apatite fission-track data from across most of the Yarlung River catchment (covering the Trans- and Tethyan Himalayas) to quantify modern erosion. Our results reveal a pronounced spatial bimodal erosion pattern (high-low-high) that shows a positive correlation with seasonal temperature variation amplitude, especially in small- to medium-sized catchments (<20,000 km2). We demonstrate that freeze-thaw cycling and periglacial processes, commonly not considered in long-term erosion models for such regions, significantly enhance erosion rates in periglacial zones, complementing established tectonic and monsoonal drivers. Hence, we recognize Quaternary temperature variability in a cooling climate as a substantial contributor to Himalayan erosion. This finding necessitates a critical reappraisal of our understanding of existing models of landscape evolution in similar settings worldwide.

中纬度山地带对第四纪气候波动的侵蚀响应尚不完全清楚，特别是在喜马拉雅地区。虽然构造和季风被认为是那里剥蚀的主要驱动因素，但有限的高分辨率古侵蚀记录使得第四纪气候的影响不确定。在这里，我们利用来自雅鲁藏布江大部分流域（覆盖跨喜马拉雅和特提斯喜马拉雅）的新的碎屑磷灰石裂变轨迹数据来量化现代侵蚀。研究结果表明，流域土壤侵蚀具有明显的空间双峰模式（高-低-高），且与季节温度变化幅度呈正相关，特别是在中小流域（<20,000 km2）。研究表明，冻融循环和冰缘过程显著提高了冰缘带的侵蚀速率，补充了已建立的构造和季风驱动因素，而这些因素在这些地区的长期侵蚀模型中通常不被考虑。因此，我们认识到第四纪降温气候中的温度变化是喜马拉雅侵蚀的重要因素。这一发现需要对我们对世界各地类似环境下景观演变的现有模型的理解进行批判性的重新评估。

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引用次数: 0

Aridity/humidity fluctuations in the westerlies – Asian monsoon transitional zone since ~3.4 Ma ~3.4 Ma以来西风带-亚洲季风过渡带的干湿波动

IF 3.9 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-25 DOI: 10.1016/j.gloplacha.2026.105324

Baotian Pan, Xiaohua Li, Dianbao Chen, Eduardo Garzanti, Dexuan Chen, Menghao Li, Jin Li

Climate changes of the transitional zone between the mid-latitude westerlies and the East Asian monsoon on the tectonic scale remains unclear. The Jinta Basin, located close to the outermost frontier of the NE Tibetan Plateau within the mid-latitude interior of Asia, provides critical insights into climatic processes at the convergence between the influence of the westerly winds and the East Asian monsoon. In this study, we present high-resolution environmental magnetic records from a 268-m-long drill core through fluvio-lacustrine sediments at Liangjiazhuang (LJZ). The χfd/HIRM record from this core indicates humid conditions between ~3.4 and ~ 2.4 Ma, consistent with global warming in the late Pliocene driven by elevated atmospheric CO2 concentration. Since the beginning of the Pleistocene, the westerlies–monsoon system has become decoupled while the climate in the Jinta Basin has subsequently come under the control of the westerlies. The Jinta Basin experienced long-term stepwise aridification after ~2.4 Ma, and ~ 1.1 Ma, as a combined effect of global cooling, the expansion of Northern Hemisphere ice-sheets, and the surface uplift of the NE Tibetan Plateau. Increased sea-surface temperature in the North Atlantic Ocean linked with the Atlantic Meridional Overturning Circulation may have contributed to a humid interval in the Central Asian interior between ~1.8 Ma and ~ 1.1 Ma. In addition, increased χlf and χfd values after ~0.8 Ma suggest enhanced input of ferrimagnetic minerals, resulting from intensified physical weathering and glacial abrasion on the NE Tibetan Plateau following the Mid-Pleistocene Transition (MPT). In addition, ferrimagnetic minerals transported by westerlies contributed to the eutrophication of North Pacific Ocean waters. Our findings provide a high-resolution environmental magnetic records from the westerlies – Asian monsoon transitional zone. The hydroclimate of middle-latitude Asia since the late Pliocene – Quaternary was collectively governed by CO2 concentration, global cooling linked to expansion of Northern Hemisphere ice-sheets, sea-surface temperature changes in the North Atlantic Ocean, and the surface uplift of the NE Tibetan Plateau.

中纬度西风带与东亚季风过渡带在构造尺度上的气候变化尚不清楚。金塔盆地位于亚洲中纬度内陆，靠近东北青藏高原的最外边界，为西风和东亚季风影响交汇的气候过程提供了重要的见解。在梁家庄（LJZ）的河流湖相沉积物中，我们获得了268 m长的钻孔岩心的高分辨率环境磁记录。该岩心的χfd/HIRM记录表明，在~3.4 ~ ~ ~ 2.4 Ma之间存在湿润条件，与上新世晚期大气CO2浓度升高导致的全球变暖一致。自更新世以来，西风带-季风系统已经脱钩，金塔盆地的气候随后受到西风带的控制。在~2.4 Ma和 ~ 1.1 Ma之后，由于全球变冷、北半球冰盖扩张和青藏高原东北缘地表隆升的共同作用，金塔盆地经历了长期的逐步干旱化过程。北大西洋海表温度升高与大西洋经向翻转环流有关，可能导致中亚内陆在~1.8 Ma和 ~ 1.1 Ma之间出现湿润期。χf和χfd值在~0.8 Ma后增大，表明青藏高原东北缘中更新世过渡（MPT）后物理风化和冰川磨损加剧，铁磁性矿物输入增强。此外，由西风带输送的铁磁性矿物对北太平洋水体富营养化也有贡献。我们的发现提供了来自西风带-亚洲季风过渡带的高分辨率环境磁记录。上新世-第四纪以来亚洲中纬度地区的水文气候是由CO2浓度、北半球冰盖扩张引起的全球变冷、北大西洋海表温度变化和青藏高原东北缘表面隆升共同控制的。

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引用次数: 0

Paleozoic and Mesozoic oceanic anoxic events and biotic crises 古生代和中生代海洋缺氧事件与生物危机

IF 3.9 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-24 DOI: 10.1016/j.gloplacha.2026.105329

Haijun Song, Alexandre Pohl, Alexander M. Dunhill, Xi Chen

引用次数: 0

Intensified winter mixing drives enhancement of mesopelagic nutrient supply and primary productivity around the Okinawa trough 冬季混合的加剧推动了冲绳海槽周围中上层养分供应和初级生产力的增强

IF 3.9 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-21 DOI: 10.1016/j.gloplacha.2026.105317

Zhongsheng Xu, Jingjing Zhang, Jiliang Xuan, Yifan Zhang, Bin Wang, Dewang Li, Haiyan Jin, Hongliang Li, Jianfang Chen

引用次数: 0

Active faulting and crustal deformation along the East Sunda-Banda Arc: Implications for Regional Geohazards 东巽他-班达弧活动断裂与地壳变形：对区域地质灾害的启示

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-21 DOI: 10.1016/j.gloplacha.2026.105326

Xiaodong Yang , Xiwu Luan , Liangyu Zhu , Xinze Han , Zhiwen Zhang , Zhiyuan Zhou , Jian Lin , Liming Wang

The east Sunda-Banda Arc is among the most tectonically active regions in southeast Asia. However, most instrumental major earthquakes (M_W ≥ 6.6) have occurred along the Flores-Wetar thrust (FWT) in the backarc, while few such events have occurred in the Java trench and Timor Trough (TT) in the forearc. The mechanism behind such contrasting earthquake distribution from backarc to forearc remains unclear. Here we integrate new 2D seismic profiles, seismicity and focal mechanisms, GPS velocities and seismic velocity models to study the active faulting, strain partition, earthquake locations and their implications for regional geohazards. Our results show that the FWT and TT slip at rates of 7.6–23.9 mm/yr and 13.3–30.7 mm/yr respectively, accounting for 9.3%–29.2% and 16.3%–37.6% of the convergence between Indo-Australian and Sunda plates. The FWT is seismically more active presently with 12 thrust events (M_W ≥ 6.6) including the largest one of 1992 Flores M_W 7.9, while the TT seems to be less active as it is absent of thrust events (M_W ≥ 6.6) and lacks seafloor thrusting. However, the short observational period (since 1900) cannot rule out a possible longer earthquake recurrence along TT. A variable strain rate is observed along FWT where the highest value (>200 nanostrain/yr) is coincident with the 1992 M_W 7.9 location may represent a transient feature which will decay with time. By integrating the strain rate with earthquake and rupture locations, we propose two seismic gaps along FWT, which combined with distinct seafloor FWT scarps at places reveals a significant seismic and tsunami threat.

东巽他-班达弧是东南亚构造最活跃的地区之一。然而，大多数仪器大地震（MW≥6.6）发生在弧后的弗洛雷斯-韦塔尔逆冲（FWT），而在弧前的爪哇海沟和帝汶海槽（TT）很少发生此类事件。弧后与弧前地震分布差异背后的机制尚不清楚。本文结合新的二维地震剖面、地震活动性和震源机制、GPS速度和地震速度模型，研究了活动断层、应变分区、地震位置及其对区域地质灾害的影响。研究结果表明，印度-澳大利亚板块与巽他板块的辐合过程中，FWT和TT分别以7.6 ~ 23.9 mm/yr和13.3 ~ 30.7 mm/yr的速率发生滑动，分别占9.3% ~ 29.2%和16.3% ~ 37.6%。FWT目前在地震上较为活跃，有12次逆冲事件（MW≥6.6），其中包括1992年弗洛雷斯最大的一次MW 7.9，而TT似乎不太活跃，因为它没有逆冲事件（MW≥6.6）和缺乏海底逆冲。然而，较短的观测周期（自1900年以来）不能排除沿TT可能有较长时间的地震复发。沿FWT观察到一个可变的应变率，其中最大值（>；200纳米应变/年）与1992 MW 7.9的位置一致，可能代表一个瞬态特征，它将随着时间的推移而衰减。通过将应变率与地震和破裂位置相结合，我们提出了沿FWT的两个地震间隙，这些间隙与不同的海底FWT陡坡相结合，显示出明显的地震和海啸威胁。

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引用次数: 0

Late Cenozoic transtensional deformation along the Chenghai fault zone and its constraint on micro-block clockwise rotation in the southeastern Tibetan Plateau 青藏高原东南部澄海断裂带晚新生代张拉变形及其对微块顺时针旋转的约束

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-20 DOI: 10.1016/j.gloplacha.2026.105320

Xiaolong Huang , Zhichao Li , Zhonghai Wu , Xiaojin Huang , Kungang Wu , Feipeng Huang

The Chenghai fault zone is a crucial component of the Dali fault system, essential for understanding Cenozoic crustal deformation along the southeastern Tibetan Plateau. This study involved detailed remote sensing and field mapping to examine the geometry and kinematics of the fault zone, with the purpose of analyzing the late Cenozoic deformation in the study area. Findings reveal that the Chenghai fault zone extends for 200 km from Jinguan to the southern end of the eastern Midu Basin, where it intersects and follows the trace of the Red River Fault. The Chenghai fault zone has left-lateral, normal-slip kinematics, with the normal-slip component being pronounced along most fault segments. The transtensional slip likely began in the early Pliocene (ca. 7 Ma) based on the analysis of thermochronology data and the sedimentary age of the Sanying Formation. The maximum dip- and left-slip rates are about 0.2–0.3 mm/yr and 0.8–0.9 mm/yr, respectively, since. ca. 7 Ma. Through the analysis of the geometry, kinematics, and seismic activity of the Chenghai fault zone, the study concludes that the Chenghai fault zone exhibits significant rotation, which can be attributed to the clockwise rotation of the Dali fault system. Combined geodetic velocity profiles, we infer that the deformation of the Dali fault system is primarily influenced by the non-uniform rotation of the southeastern Tibetan Plateau. To the west of the Dali fault system, clockwise rotation remains uninterrupted, whereas to the east, material extrusion between the Dali fault system and the Xianshuihe-Xiajiang fault zone is inhibited by the Red River fault zone. The left-lateral motion along the Chenghai fault zone is predominantly governed by clockwise rotation, while the normal faulting is chiefly controlled by differential rotation. Consequently, we infer that the Dali rift system is a manifestation of differential rotation along the southeastern margin of the Tibetan Plateau. By comparing it with the Pamir Plateau and the Aegean Sea region, we propose that pre-existing structures and block rotation are crucial mechanisms driving lateral deformation in the peripheral zones of continent-continent collision orogens.

澄海断裂带是大理断裂系统的重要组成部分，对了解青藏高原东南部新生代地壳变形具有重要意义。通过详细的遥感和野外测绘，研究了断裂带的几何和运动学，目的是分析研究区晚新生代的变形。结果表明，澄海断裂带自金关至米渡盆地东部南端，与红河断裂带相交，沿红河断裂带延伸200 km。澄海断裂带具有左旋正滑运动，大部分断裂带段有明显的正滑分量。根据热年代学资料和三营组沉积年代分析，该构造的张拉滑动可能开始于上新世早期（约7 Ma）。最大倾角和左滑移速率分别为0.2 ~ 0.3 mm/yr和0.8 ~ 0.9 mm/yr。约7 Ma。通过对澄海断裂带几何、运动学和地震活动性的分析，认为澄海断裂带呈现明显的旋转，这可归因于大理断裂系的顺时针旋转。结合大地速度剖面，我们推断大理断裂系统的变形主要受青藏高原东南部不均匀旋转的影响。在大理断裂体系的西面，顺时针旋转不间断，而在东面，大理断裂体系与鲜水河—下江断裂带之间的物质挤压受到红河断裂带的抑制。程海断裂带的左旋运动主要受顺时针旋转控制，而正断层主要受差速旋转控制。因此，我们推断大理裂谷系是青藏高原东南缘微分旋转的表现。通过与帕米尔高原和爱琴海地区的对比，我们提出在陆-陆碰撞造山带外围带，既存构造和块体旋转是驱动侧向变形的关键机制。

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引用次数: 0

Plio–Pleistocene shift in East Asian weathering regimes: From continental margin floodplains to highland erosion in the Yellow River basin, inferred from geochemical and lithium isotopic records 东亚风化机制的上新世-更新世转移：从地球化学和锂同位素记录推断的黄河流域大陆边缘洪泛平原到高原侵蚀

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change

Pub Date : 2026-01-19 DOI: 10.1016/j.gloplacha.2026.105312

Fangliang Li , Shouye Yang , Evan J. Ramos , Daniel O. Breecker , Yulong Guo , Jingrui Li , Fangbing Li , Chengfan Yang , Chenyang Jin

Continental weathering regulates long-term climate via atmospheric CO₂ consumption. Understanding how weathering regimes respond to tectonic and climatic forcing is therefore essential for clarifying the weathering-climate relationships. The Plio-Pleistocene reorganization of the Yellow River drainage provides an ideal setting to investigate such changes. While accumulating evidence suggests establishment of the modern-like drainage system no later than ∼1 Ma, how this geomorphic transformation affected weathering patterns remains unexplored. Here, we address this question using new Li isotopic data (δ⁷Li) from a marginal sea sediment core, integrated with Nd isotopes and geochemical records. Our multi-proxy record reveals a coupled provenance and weathering regime shift during the Mid-Pleistocene Transition (MPT). The εNd values shift from cratonic (−12 to −16) to orogenic (−10 to −12) signatures, while δ⁷Li values of weathering products transition from −2.7 ± 0.9‰ to −0.9 ± 0.6‰. Combined with mineralogical and geochemical weathering indices, these data document a shift from more incongruent weathering dominated by continental margin floodplains to more congruent weathering governed by highlands of the NE Tibetan Plateau and Loess Plateau. We interpret this transition as a direct response to Yellow River reorganization, which replaced proximal cratonic sources with detritus from rapidly eroding orogenic and loess regions. Our study thus demonstrates that the balance between floodplain and mountain weathering set by large river drainage integration, maybe an important control on the type and intensity of silicate weathering over geologic timescales.

大陆风化作用通过大气中二氧化碳的消耗来调节长期气候。因此，了解风化机制是如何对构造和气候强迫作出反应的，对于阐明风化-气候关系至关重要。黄河流域的上新世—更新世重组为研究这种变化提供了理想的环境。虽然越来越多的证据表明，类似现代的排水系统的建立不迟于~ 1 Ma，但这种地貌转变如何影响风化模式仍未被探索。在这里，我们利用来自边缘海沉积物岩心的新的Li同位素数据（δ7Li），结合Nd同位素和地球化学记录来解决这个问题。我们的多代理记录揭示了中更新世过渡（MPT）期间物源和风化机制的耦合变化。εNd值由克拉通（- 12 ~ - 16）特征向造山带（- 10 ~ - 12）特征转变，δ7Li值由- 2.7±0.9‰向- 0.9±0.6‰转变。结合矿物学和地球化学风化指标，这些数据表明青藏高原东北缘和黄土高原高原的风化由以大陆边缘洪泛平原为主的不一致风化向以高原为主的一致风化转变。我们将这种转变解释为黄河重组的直接反应，黄河重组用快速侵蚀造山带和黄土区的碎屑取代了近端克拉通源。因此，我们的研究表明，在地质时间尺度上，河漫滩和山地风化的平衡可能是控制硅酸盐风化类型和强度的重要因素。

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引用次数: 0