Gondwana Research最新文献_第5页

Spatiotemporal variations of Early to Middle Paleozoic magmatism in northern Beishan: Implications for accretionary and collisional processes in the southern Central Asian Orogenic belt 北山北部早-中古生代岩浆活动时空变化：中亚造山带南部增生和碰撞过程的启示

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2025-01-05 DOI: 10.1016/j.gr.2024.12.009

Runwu Li , Ying Tong , Shangguo Su , Victor P. Kovach , Olga V. Yakubovich

Spatiotemporal variations in magmatic compositions reflect changes in magma sources and their formation conditions, offering insights into geodynamic processes. This study presents new zircon U–Pb and geochemical data for early–mid Paleozoic granitoids in northern Beishan, located within the southern Central Asian Orogenic Belt. Late Ordovician (451 Ma) granodiorites are I-type and formed through water-fluxed melting of amphibolites. Early Devonian (403–397 Ma) granites show I-, S-, and A-type affinities with enriched Sr–Nd isotopes, indicating ancient crustal sources. Late Devonian to early Carboniferous (366–357 Ma) granitoids exhibit I-type characteristics. They and coeval intermediate-felsic intrusives show similar Sr–Nd–Hf isotopes, with ⁸⁷Sr/⁸⁶Sr_(i) from 0.7045 to 0.7075, ε_Nd(t) from −2.93–0.92, and zircon ε_Hf(t) predominantly ranging from 2.9 to 6.5. Geochemical studies suggest their derivation from metasomatized mantle, with fractional crystallization playing a key role. Available data reveal three magmatic stages: ∼500–420 Ma, ∼420–390 Ma, and ∼ 370–350 Ma. Stage I mainly consists of (quartz) diorites, granodiorites, and granites. They show increasing K₂O/Na₂O and zircon saturation temperatures from south to north, with the Hanshan unit characterized by A-type granites. These variations reflect northward subduction of the Beishan Ocean, leading to water-fluxed crustal melting in the Mazongshan arc and dehydration melting in the Hanshan back-arc. In Stage II, complex mafic–felsic rock associations composed of (quartz) diorites, high-silica granites, gabbros, and intermediate–mafic volcanic rocks, along with high temperatures required for S- and A-type granite formation, suggest increased mantle heat input from slab breakoff following Beishan Ocean closure. Stage III rocks, confined to the Mazongshan unit, consist of diorites, tonalites, granodiorites, and granites associated with southward subduction of the Jijitaizi–Xiaohuangshan Ocean. This study demonstrates that multistage subduction–accretion contributed to Beishan orogen formation, highlighting magmatic compositional variations as key to understanding accretionary orogens.

岩浆成分的时空变化反映了岩浆来源及其形成条件的变化，为研究地球动力学过程提供了新的思路。本文为中亚造山带南部北山北部早-中古生代花岗岩类提供了新的锆石U-Pb和地球化学资料。晚奥陶世（451 Ma）花岗闪长岩为i型，由角闪岩溶化而成。早泥盆世（403-397 Ma）花岗岩表现出I-、S-和a型亲和关系，Sr-Nd同位素富集，显示出古地壳来源。晚泥盆世—早石炭世（366 ~ 357 Ma）花岗岩类具有i型特征。其Sr-Nd-Hf同位素特征与同时期中长英质侵入岩相似，87Sr/86Sr(i)在0.7045 ~ 0.7075之间，εNd(t)在−2.93 ~ 0.92之间，锆石εHf(t)在2.9 ~ 6.5之间。地球化学研究表明它们起源于交代地幔，分馏结晶起着关键作用。现有资料揭示了三个岩浆阶段：~ 500-420 Ma， ~ 420-390 Ma和~ 370-350 Ma。第一阶段主要由（石英）闪长岩、花岗闪长岩和花岗岩组成。K2O/Na2O和锆石饱和温度自南向北升高，寒山单元以a型花岗岩为特征。这些变化反映了北山洋向北俯冲，导致了马宗山弧的水溶性地壳熔融和寒山弧后的脱水熔融。在第二阶段，由（石英）闪长岩、高硅花岗岩、辉长岩和中基性火山岩组成的复杂镁质-长英质岩石组合，以及S型和a型花岗岩形成所需的高温，表明北山洋闭合后板块断裂增加了地幔热输入。第三期岩石局限于马宗山单元，由闪长岩、闪长岩、花岗闪长岩和与吉吉台子—小黄山洋向南俯冲有关的花岗岩组成。研究表明，北山造山带形成过程中存在多期俯冲-增生作用，岩浆成分变化是认识造山带的关键。

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引用次数: 0

Coupling of shallow marine redox change and multi-stage animal radiations during the early Cambrian 早寒武纪浅海氧化还原变化与多阶段动物辐射的耦合

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2025-01-04 DOI: 10.1016/j.gr.2025.01.003

Yanhong Zheng , Chao Chang , Jiahao Li , Yi Ding , Xiaotong Tang , Jianni Liu

Marine redox variations are widely accepted as an environmental driver for the Cambrian explosion, yet relative changes in shallow marine dissolved oxygen levels during the Ediacaran–Cambrian transition have long remained unconstrained. Here we present compiled nitrogen and organic carbon isotope data from shallow-water deposits in four sections, including new record from the Meishucun and Zhujiaqing sections, on the Yangtze Platform. The results reveal that nitrogenous environments with active denitrification prevailed in shallow ocean during the Terreneuvian, which may have been sufficient only for ecological successes of lophotrochozoans with relatively low O₂ demands. In contrast, the diversification of ecdysozoans and deuterostomes with higher O₂ demands was possibly suppressed and delayed until a rise of dissolved oxygen concentrations during the Cambrian Age 3. Our findings provide crucial support for a causal link between marine oxygen availability and rapid diversification of metazoans during the Cambrian explosion.

海洋氧化还原变化被广泛认为是寒武纪大爆发的环境驱动因素，但在埃迪卡拉纪-寒武纪过渡期间，浅海溶解氧水平的相对变化一直没有得到限制。本文整理了扬子地台4个剖面的浅水沉积氮、有机碳同位素资料，其中包括梅树村剖面和朱家庆剖面的新记录。结果表明，Terreneuvian时期浅海中普遍存在积极反硝化的氮环境，这可能仅足以满足相对低氧需要量的浮游动物的生态成功。相比之下，高氧需要量的外生动物和后口动物的多样化可能被抑制和延迟，直到寒武纪第3期溶解氧浓度上升。我们的发现为寒武纪大爆发期间海洋氧气供应与后生动物快速多样化之间的因果关系提供了重要支持。

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引用次数: 0

Xenoliths reveal East Gondwanan basement to Heard Island, Central Kerguelen Plateau 包体揭示了克格伦高原中部至赫德岛的东冈瓦南基底

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2025-01-03 DOI: 10.1016/j.gr.2025.01.002

Jeremy L. Asimus , Jacqueline A. Halpin , Trevor J. Falloon , Nathan R. Daczko , Joanne M. Whittaker , Jodi M. Fox , Ivan Belousov

Increasingly it is recognised that the breakup of East Gondwana and formation of the Indian Ocean has led to the creation of many microcontinents, including Elan Bank, Gulden Draak Rise, and Batavia Rise. Whether the central and southern sections of the Kerguelen Plateau contain additional Gondwanan microcontinents remains controversial. Continental crust residing in these regions is mainly inferred from geochemical and geophysical datasets but little to no direct sampling evidence corroborates this. Here, we characterise continental rocks trawled from banks and plateaus on the Central Kerguelen Plateau, using petrographic techniques and U-Pb zircon and apatite dating. Recovered granitoids and felsic gneisses have Paleoarchean (∼3.3 Ga) and Mesoproterozoic (∼1.44 Ga, ∼1.19 Ga) zircon U-Pb crystallisation ages, as well as Mesoproterozoic (∼1.6 Ga, 1.15 Ga) and Cambrian (∼0.5 Ga) apatite U-Pb cooling ages. We interpret a microcontinent resides in the Central Kerguelen Plateau and must underly Heard Island, based on: (1) correlation of the U-Pb age groups of the recovered granitoid/gneissic rocks with conjugate Indian crust within East Gondwana, (2) regional geochemical and geophysical evidence for widely distributed microcontinental crust in the Kerguelen Plateau and (3) strong evidence supporting a local origin for the recovered rocks versus an ice-rafted Antarctic origin. Based on a volcanic rim preserved on a gneissic sample, we interpret portions of the Central Kerguelen Plateau microcontinent were entrained as xenoliths during the recent volcanic eruptions associated with Heard Island. A ridge jump of the Southeast Indian Ridge between 115–102 Ma likely formed the Central Kerguelen Plateau microcontinent and we speculate that related ridge jumps formed a near continuous ribbon of microcontinents along the Indian margin during the breakup of East Gondwana.

越来越多的人认识到，东冈瓦纳的解体和印度洋的形成导致了许多微大陆的形成，包括埃兰滩、古尔登-德拉克海隆和巴达维亚海隆。凯尔盖朗高原的中部和南部是否包含更多的冈瓦纳微大陆仍存在争议。这些地区的大陆地壳主要是通过地球化学和地球物理数据集推断出来的，但几乎没有直接的取样证据可以证实这一点。在此，我们利用岩石学技术以及铀-铅锆石和磷灰石测年法，描述了从凯尔盖朗中部高原的河滩和高原拖网中提取的大陆岩石的特征。回收的花岗岩和长英片麻岩具有古新世（∼3.3 Ga）和中元古代（∼1.44 Ga, ∼1.19 Ga）的锆石U-Pb结晶年龄，以及中元古代（∼1.6 Ga, 1.15 Ga）和寒武纪（∼0.5 Ga）的磷灰石U-Pb冷却年龄。我们解释说，凯尔盖朗高原中部有一个微型大陆，赫德岛的下面一定有一个微型大陆，其依据是：(1)回收的花岗岩/片麻岩的U-Pb年龄组与东冈瓦纳共轭印度地壳的相关性；(2)区域地球化学和地球物理证据表明凯尔盖朗高原广泛分布着微型大陆地壳；(3)强有力的证据支持回收的岩石起源于当地，而不是南极冰铸的起源。根据片麻岩样本上保存的火山边缘，我们解释了凯尔盖朗高原中部微大陆的部分岩石是在与赫德岛有关的近期火山喷发过程中夹带成异形岩的。印度东南海脊在115-102 Ma之间的一次海脊跃变可能形成了凯尔盖朗高原中部微大陆，我们推测在东冈瓦纳断裂期间，相关的海脊跃变沿着印度边缘形成了一条近乎连续的微大陆带。

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引用次数: 0

A novel panel of European economies pursuing carbon neutrality: Do current climate technology and renewable energy practices really pass through the prism of sustainable development? 一个由追求碳中和的欧洲经济体组成的新小组：当前的气候技术和可再生能源实践真的能通过可持续发展的棱镜吗？

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2025-01-03 DOI: 10.1016/j.gr.2025.01.001

Abdullah Emre Caglar , Muhammet Daştan , Zahoor Ahmed , Mehmet Mert , Salih Bortecine Avci

Given the European Union’s initiatives to embrace cutting-edge technologies and transition to greener energy sources, it is imperative to assess the influence of climate technology and renewable energy utilization on the environmental sustainability of its member states. This study contributes to the existing body of literature by undertaking a novel assessment of the implications of climate technology and renewable energy consumption on load capacity factor, one of the most encompassing environmental sustainability indicators. To this end, the study examines data from 1990 to 2021 employing the “Continuously Updated Fully Modified” (Cup-FM) and “Continuously Updated and Bias-Corrected” (Cup-BC) approaches, concentrating on the five most attractive European Union countries for renewable energy: Germany, France, Spain, the Netherlands, and Denmark. The paper also considers the ecological impacts of economic growth, foreign direct investment, and urbanization. The results reveal a negative relationship between climate technology and ecological quality. While renewable energy consumption exhibits a positive but statistically insignificant association with ecological well-being, economic growth, foreign direct investment, and urbanization are found to have detrimental effects on ecological quality. In opposition to widely held claims, these striking observations suggest that renewable energy consumption and climate technology are not yet well equipped to fight the global climate battle. The underlying reasons behind these outcomes are thoroughly discussed, and strategies targeting Sustainable Development Goals 7 and 13 are proposed to catalyze advancements in research and development of cleaner energy and green technologies for a sustainable future.

考虑到欧盟采用尖端技术和向绿色能源过渡的举措，当务之急是评估气候技术和可再生能源利用对其成员国环境可持续性的影响。本研究对气候技术和可再生能源消费对负荷能力系数（最全面的环境可持续性指标之一）的影响进行了新颖的评估，为现有文献做出了贡献。为此，该研究采用 "持续更新完全修正"（Cup-FM）和 "持续更新和偏差修正"（Cup-BC）方法，对 1990 年至 2021 年的数据进行了研究，重点关注对可再生能源最具吸引力的五个欧盟国家：德国、法国、西班牙、荷兰和丹麦。论文还考虑了经济增长、外国直接投资和城市化对生态的影响。结果显示，气候技术与生态质量之间存在负相关关系。可再生能源消费与生态福祉之间呈现出正相关，但在统计上并不显著，而经济增长、外国直接投资和城市化则对生态质量产生了不利影响。与普遍的说法相反，这些惊人的观察结果表明，可再生能源消费和气候技术还不具备应对全球气候之战的能力。本报告深入探讨了这些结果背后的根本原因，并提出了针对可持续发展目标 7 和 13 的战略，以促进清洁能源和绿色技术的研究与开发，实现可持续发展的未来。

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引用次数: 0

Editorial Board (IFC)

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2025-01-01 DOI: 10.1016/S1342-937X(24)00317-4

引用次数: 0

Impact of adaptation technologies and green energy on environmental quality: Evidence from G8 economies 适应技术和绿色能源对环境质量的影响：来自八国集团经济体的证据

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2024-12-25 DOI: 10.1016/j.gr.2024.11.016

Khatib Ahmad Khan , Afshan Hamid , Arshian Sharif , Qasim Raza Syed , Ahsan Anwar

The current era calls for an urgent need for environmental protection, and adaptation technologies stand as forerunners of innovations, putting transformative solutions to cope with the issues relating to the environment. Moreover, the imperative to adapt to frequently changing climate is at the heart of sustainable development goals. Understanding the dire need for adaptation technologies as an essential tool for building resilience and enhancing the load capacity factor to raise environmental quality, the present study focuses on the group of eight (G8) industrialized countries over the period from 1990 to 2020, to explore the role of adaptation technologies (ATEC) and green energy (REC) on the environmental quality (LCF). The empirical outcomes generated through Panel Quantile Regression (PQR) verify the existence of the LCC hypothesis in highly industrialized economies. The results show that ATEC positively and significantly affects LCF with an increasing rate from middle to upper quantiles. In contrast, REC has continuously an increasing impact throughout the quantiles with high significance. The robust outcomes are also endorsed by employing Fully Modified Ordinary Least Squares (FMOLS) and Dynamic Ordinary Least Squares (DOLS). The study takes into consideration several Sustainable Development Goals (SDGs) like SDG 09 (adoption of technologies), SDG 07(green energy and renewable energy consumption), SDG 13 (climate action), SDG 14 (life below water), SDG 15 (life on land), SDG 03 (good health and well-being), SDG 06 (clean water and sanitation), SDG 11 (sustainable cities and communities), SDG 12 (responsible consumption and production), and SDG 17 (partnership for goals) while formulating policy implications, particularly for G8 economies.

当今时代迫切需要保护环境，适应技术是创新的先导，为解决环境问题提供了变革性的解决方案。此外，适应频繁变化的气候是可持续发展目标的核心。认识到适应技术作为建设韧性和提高负荷能力因子以提高环境质量的重要工具的迫切需要，本研究以1990 - 2020年八国集团（G8）工业化国家为研究对象，探讨适应技术（ATEC）和绿色能源（REC）对环境质量（LCF）的作用。通过面板分位数回归（PQR）得出的实证结果验证了高度工业化经济体中LCC假设的存在。结果表明，ATEC对LCF有显著的正向影响，且从中分位数到上分位数呈递增趋势。相反，REC在整个分位数上的影响持续增加，具有高度显著性。采用完全修正普通最小二乘（FMOLS）和动态普通最小二乘（DOLS）也证实了稳健的结果。该研究在制定政策影响时考虑了几个可持续发展目标（SDG），如可持续发展目标09（采用技术）、可持续发展目标07（绿色能源和可再生能源消费）、可持续发展目标13（气候行动）、可持续发展目标14（水下生命）、可持续发展目标15（陆地生命）、可持续发展目标03（良好健康和福祉）、可持续发展目标06（清洁水和卫生设施）、可持续发展目标11（可持续城市和社区）、可持续发展目标12（负责任的消费和生产）和可持续发展目标17（目标伙伴关系）。特别是对G8经济体而言。

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引用次数: 0

Is energy security the missing piece of the environmental puzzle? Fresh evidence from load capacity factor and ecological footprint indicators 能源安全是环境难题中缺失的一块吗？来自负荷能力因子和生态足迹指标的新证据

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2024-12-24 DOI: 10.1016/j.gr.2024.11.015

Tunahan Degirmenci , Oguzhan Bozatli , Mucahit Aydin , Daniel Balsalobre-Lorente

Despite their great potential, low-carbon energies can be used in limited amounts. Energy R&D expenditures can ensure that low-carbon energies are used at a rate close to their potential by increasing energy efficiency and reducing losses during the production and consumption phases. The positive environmental impacts of low-carbon energy and energy R&D expenditures can be accelerated by political globalization. As an example of political globalization, the Kyoto Protocol has enabled the adoption of clean technologies and low-carbon energies by providing various obligations to many countries, especially developed countries. Although some countries have withdrawn from the obligations embodied in the protocol, they are taking measures to ensure environmental sustainability through individual efforts in their own interests. The USA is the example that best reflects this. The environmental impact of energy security may vary depending on the energy sources that provide affordable and accessible energy. This study examines the effects of energy R&D expenditures, political globalization, energy security, and low-carbon energy consumption on the USA’s load capacity factor and ecological footprint from 1980 to 2018 using Fourier-based FMOLS and CCR estimators. The robust results of this study show that low-carbon energy consumption, energy technology R&D expenditures, and political globalization increase environmental sustainability. Policymakers should allocate more resources to developing low-carbon energy sources, increasing energy efficiency, and encouraging the adoption of clean energy technologies.

尽管低碳能源潜力巨大，但其使用量有限。能源研发支出可以通过提高能源效率和减少生产和消费阶段的损失，确保以接近其潜力的速度使用低碳能源。政治全球化可以加速低碳能源和能源研发支出的积极环境影响。作为政治全球化的一个例子，《京都议定书》通过向许多国家，特别是发达国家提供各种义务，使清洁技术和低碳能源的采用成为可能。虽然一些国家已经退出了议定书所载的义务，但它们正在采取措施，通过个别的努力，为自己的利益确保环境的可持续性。美国是最能反映这一点的例子。能源安全对环境的影响可能因提供可负担和可获得能源的能源来源而异。本研究采用基于傅立叶的FMOLS和CCR估计，考察了1980 - 2018年能源研发支出、政治全球化、能源安全和低碳能源消费对美国负荷能力因子和生态足迹的影响。本研究的有力结果表明，低碳能源消费、能源技术研发支出和政治全球化提高了环境可持续性。政策制定者应该将更多的资源用于开发低碳能源、提高能源效率和鼓励采用清洁能源技术。

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引用次数: 0

Corrigendum to “Contrasting physical erosion rates in cratonic catchments: The Ogooué and Mbei rivers, Western Central Africa” [Gondwana Res. 138 (2025) 192–209]

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2024-12-20 DOI: 10.1016/j.gr.2024.12.004

V. Regard , S. Carretier , J.-S. Moquet , S. Choy , P.-H. Blard , S. Bogning , A.P. Mbonda , E. Mambela , M.C. Paiz , M. Séranne , J. Charreau , D. Rouby , J. Bouchez , J. Gaillardet , J.-J. Braun , Y. Denèle

引用次数: 0

Arc sections correlation along the Gondwana margin: Dynamic shifts tracked by detrital zircon

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2024-12-19 DOI: 10.1016/j.gr.2024.12.007

Esther Rojo-Pérez , Javier Fernández-Suárez , José M. Fuenlabrada , Richard Albert , Rubén Díez Fernández , Sonia Sánchez Martínez , Irene Novo-Fernández , Diana Moreno-Martín , Axel Gerdes , Ricardo Arenas

Sections of the Gondwana margin recording the evolution of Ediacaran and Cambrian arc systems are preserved along the Variscan Orogen. The sedimentary sequences deposited in it and associated with its activity can provide significant keys to understanding the dynamics of the margin. In this sense, sections of the Gondwana margin that include arc magmatism between c. 602 and 500 Ma are well preserved in the SW and NW Iberian Massif. However, the activity in these areas was not synchronous, and the potential connection between both sectors along the Gondwana margin and its meaning is still poorly understood. U-Pb geochronology performed on detrital zircon grains of the Ediacaran Serie Negra Group (SW Iberia) show a maximum depositional age between 619 and 559 Ma for its Montemolín and Tentudía formations, respectively. The obtained Hf data from the same zircon grains supports significant crustal input. Meanwhile, U-Pb performed on detrital zircon grains of the Cambrian Betanzos Unit (NW Iberia) exhibit essentially mantle-derived Hf signature at 544–537 Ma (Maximum Depositional Age). Based on these data, a dynamic model for the Gondwana margin at c. 500 Ma has been proposed, comparable to the current processes operating on the Pacific edge of the North American plate. This model highlights a spatial and temporal connection between the Gondwana margin’s peripheral sections (SW and NW Iberia).

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引用次数: 0

International Association for Gondwana Research (IAGR) 2024 Annual Convention and 21st International Conference on Gondwana to Asia: A report 国际冈瓦纳研究协会（IAGR） 2024年年会暨第21届冈瓦纳到亚洲国际会议报告

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Gondwana Research

Pub Date : 2024-12-19 DOI: 10.1016/j.gr.2024.12.006

R. Nagarajan

引用次数: 0