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Pre-Cryogenian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 899-918页

作者： Peiyuan HU Qingguo ZHAI guochun zhao Peter A.CAWOOD Yue TANG Yiming LIU Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Department of Earth Sciences University of Hong KongPokfulam RoadHong Kong 999077China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China School of Earth Atmosphere&EnvironmentMonash UniversityMelbourneVIC 3800Australia

The composition and geological evolution of pre-Cryogenian material in the Tibetan Plateau and its surrounding areas have played an important role in studying the formation and evolution of early supercontinents on *** paper systematically summarizes the characteristics of pre-Cryogenian sedimentation,paleontology,magmatism,and metamorphism in the Tibetan Plateau and its surrounding *** on existing data,the records of pre-Cryogenian sedimentation and paleontology are mainly concentrated in the Meso-Neoproterozoic,with relatively few records from the Paleoproterozoic or *** oldest geological record is the Hadean detrital zircons in the metamorphosed sedimentary rocks of the Himalaya and Qamdo areas(ca.4.0 Ga).The Tibetan Plateau and surrounding areas preserve records related to the formation and evolution of the Kenor supercraton,and the Columbia,Rodinia,and Gondwana ***-Cryogenian basements can be divided into three types:Tarim-,Yangtze-,and *** Tarim-type basement has a paleogeographic affinity with the northern margins of the Australian and Indian continents and lacks detrital zircon age peaks and magmatic-metamorphic records related to the Rodinia assembly(ca.1.3-0.9 Ga).The Yangtze-type basement records volcanic activity related to global cooling in the latest pre-Cryogenian period and contains Meso-Neoproterozoic stromatolite and micropaleoflora fossils,as well as magmaticmetamorphic records related to Rodinia assembly(ca.1.1-1.0 Ga).The Lhasa-type basement is characterized by Neoproterozoic rift-related sediment records(ca.900 Ma)and high-pressure metamorphic events(ca.650 Ma),with a prominent peak of detrital zircon ages of ca.1.2-1.1 *** is likely to have a paleogeographic affinity with the African continent.

关键词： Tibetan Plateau Pre-Cryogenian Sedimentation Fossils Paleogeographic evolution

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Multiple Uplift and Exhumation of the Southeastern Tibetan Plateau:Evidence from Low-Temperature Thermochronology

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 569-584页

作者： WU Limin PENG Touping FAN Weiming zhao guochun GAO Jianfeng DONG Xiaohan PENG Shili MIN Kang Tin Aung MYINT State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Chinese Academy of Sciences Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China Department of Earth Sciences The University of Hong KongHong Kong 999077China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiGuangdong 519085China Department of Geology University of MandalayMandalay 05011Myanmar

Since the Cenozoic,the Tibetan Plateau has experienced large-scale uplift and outgrowth due to the India-Asia ***,the mechanism and timing of these tectonic processes still remain ***,using apatite fission track dating and inverse thermal modeling,we explore the mechanism of different phases of rapid cooling for different batholiths and intrusions in the southeastern Tibetan *** contrast to previous views,we find that the coeval granitic batholith exposed in the same tectonic zone experienced differential fast uplift in different sites,indicating that the present Tibetan Plateau was the result of differential uplift rather than the entire lithosphere uplift related to lithospheric collapse during Cenozoic *** addition,we also suggest that the 5-2 Ma mantle-related magmatism should be regarded as the critical trigger for the widely coeval cooling event in the southeastern Tibetan Plateau,because it led to the increase in atmospheric CO_(2)level and a hotter upper crust than before,which are efficient for suddenly fast rock weathering and ***,we propose that the current landform of the southeastern Tibetan Plateau was the combined influences of tectonic and climate.

关键词： apatite fission track rapid cooling differential uplift magmatism southeastern Tibetan Plateau

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前板块构造与大陆起源研究进展及关键科学问题

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科学通报 2024年第12期69卷 1572-1585页

作者：龙晓平赵国春翟明国郭敬辉初航彭澎张少兵尹常青西北大学地质学系大陆动力学国家重点实验室西安710069 香港大学地球科学系中国香港中国科学院地质与地球物理研究所岩石圈国家重点实验室北京100029 中国地质调查局天津地质调查中心天津300170 中国科学技术大学地球和空间科学学院中国科学院壳幔物质与环境重点实验室合肥230026 中山大学地球科学与工程学院珠海510275

本文总结了现阶段前板块构造与大陆起源研究的三大重要进展:(1)提出了地幔柱构造、重力凹沉构造和热管构造的前板块构造模式;(2)揭示了非板块构造与板块构造的标志;(3)发现了地球早期层圈演化地质记录.但是,现有的前板块构造并不能完美... 详细信息

本文总结了现阶段前板块构造与大陆起源研究的三大重要进展:(1)提出了地幔柱构造、重力凹沉构造和热管构造的前板块构造模式;(2)揭示了非板块构造与板块构造的标志;(3)发现了地球早期层圈演化地质记录.但是,现有的前板块构造并不能完美解释太古宙大陆的起源,板块构造在解释大陆起源与演化方面也遇到重大挑战.此外,阐述了我国开展前板块构造与大陆起源研究的必要性、研究优势及风险,并凝练了目前前板块构造与大陆起源研究的关键科学问题:(1)地球是先有陆还是先有板块构造;(2)海陆的形成是否同步;(3)冥古宙陆壳和英云闪长岩-奥长花岗岩-花岗闪长岩(tonalite-trondhjemite-granodiorite,TTG)的起源.基于学科发展,提出动力学热模拟和比较行星学在前板块构造与大陆起源研究中的重要性.在此基础上,认为未来5~10年前板块构造与大陆起源的研究重点领域为:(1)大陆的起源及其对早期地球环境和生命的影响;(2)前板块构造样式及其形成机制;(3)太古宙的构造热体制及热演化;(4)前板块构造与类地行星演化.

关键词：大陆起源板块构造前板块构造比较行星学动力学热模拟

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华南晚中生代大陆变形、深部过程及动力学

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地质学报 2024年第3期98卷 829-861页

作者：李建华董树文赵国春张岳桥辛宇佳王金铭卢运可中国地质科学院地质力学研究所自然资源部古地磁与古构造重建重点实验室北京100081 中国地质科学院地球深部探测中心北京100037 南京大学内生金属矿床成矿机制研究国家重点实验室江苏南京210023 香港大学地球科学系中国香港西北大学地质学系大陆动力学国家重点实验室陕西西安710069

受控古太平洋板块俯冲及后撤作用,华南晚中生代经历了强烈大陆再造,并伴随幕式岩浆活动,是研究活动大陆边缘构造-岩浆作用、壳幔过程和板块俯冲动力学的天然实验室。本文系统综述了近年来发表的构造变形、岩浆作用和深部结构等多学科成... 详细信息

受控古太平洋板块俯冲及后撤作用,华南晚中生代经历了强烈大陆再造,并伴随幕式岩浆活动,是研究活动大陆边缘构造-岩浆作用、壳幔过程和板块俯冲动力学的天然实验室。本文系统综述了近年来发表的构造变形、岩浆作用和深部结构等多学科成果,以构造解析为主线,深-浅结合,在华南识别出与古太平洋板块俯冲相关的中晚侏罗世弧背缩短和白垩纪弧后伸展系统,厘定了二者的时空格架和叠加改造关系。弧背缩短系统以扬子中部的隔档-隔槽式褶皱、深部多层滑脱和双重逆冲推覆构造为特征,具SE向NW的逆冲扩展变形规律,与古太平洋板块的前进式俯冲有关。白垩纪主体以大陆伸展为主,经历了伸展和挤压变形交替,并伴随着岩浆活动的爆发、迁移和停止,其可能与板片俯冲动力学变化有关。在此基础上,我们分析了白垩纪岩石圈长距离伸展的深部过程及浅表响应,提出了岩石圈随深度变化的分层差异伸展模式。自下而上,从岩石圈地幔到上地壳,应变近一致地表现为(W)NW-(E)SE伸展,反映了垂向变形一致性。可能的垂向应力传播过程:板片后撤诱发长距离地幔流,其在岩石圈底部形成剪切牵引应力,促进下岩石圈地幔被动拉伸;上岩石圈地幔局部发育强应变剪切带,作为应力传播构造,其可有效加强壳-幔间剪切,促进下地壳韧性拉伸,将下地壳和岩石圈地幔的变形关联。我们认为岩石圈伸展、板片后撤和地幔流形成了三位一体的动力学耦合系统,将华南岩石圈长距离伸展的驱动力归结为:(1)古太平洋俯冲带海沟后撤和板片回卷诱发的远程效应,和(2)地幔流在岩石圈底部施加的剪切牵引应力。

关键词：华南晚中生代大陆变形岩石圈伸展深部过程浅表响应

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Detrital zircon constraints on late Paleozoic tectonism of the Bogda region(NW China)in the southern Central Asian Orogenic Belt

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Geoscience Frontiers 2020年第5期11卷 1533-1548页

作者： Qian Wang guochun zhao Yigui Han Jinlong Yao State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University229 Northern Taibai RoadXi’an 710069China Department of Earth Sciences The University of Hong KongPokfulam RoadHong KongChina

The Chinese North Tianshan(CNTS)in the southern part of the Central Asian Orogenic Belt(CAOB)has undergone multistage accretion-collision processes during Paleozoic time,which remain *** study addresses this issue by tracing the provenance of Late Paleozoic sedimentary successions from the Bogda Mountain in the eastern CNTS through U-Pb dating and Lu-Hf isotopic analyses of detrital *** detrital zircon U-Pb ages(N=519)from seven samples range from 261±4 Ma to 2827±32 *** most prominent age peak is at 313 Ma and subordinate ages vary from 441 Ma to 601 Ma,with some Precambrian detrital zircon ages(~7%)lasting from 694 Ma to 1024 *** youngest age components in each sample yielded weighted mean ages ranging from 272±9 Ma to 288±5 Ma,representing the maximum depositional *** and literature data indicate that some previously-assumed"Carboniferous"strata in the Bogda area were deposited in the Early Permian,including the Qijiaojing,Julideneng,Shaleisaierke,Yangbulake,Shamaershayi,Liushugou,Qijiagou,and Aoertu *** low maturity of the sandstones,zircon morphology and provenance analyses indicate a proximal sedimentation probably sourced from the East Junggar Arc and the Harlik-Dananhu Arc in the *** minor Precambrian detrital zircons are interpreted as recycled materials from the older strata in the Harlik-Dananhu *** EHf(t)values have increased since^408 Ma,probably reflecting a tectonic transition from regional compression to *** event might correspond to the opening of the Bogda intraarc/back arc rift basin,possibly resulting from a slab rollback during the northward subduction of the North Tianshan Ocean.A decrease of zirconεHf(t)values at^300 Ma was likely caused by the cessation of oceanic subduction and subsequent collision,which implies that the North Tianshan Ocean closed at the end of the Late Carboniferous.

关键词： North Tianshan Detrital zircon Sedimentary provenance Late Paleozoic Central Asian orogenic belt

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Genesis of the Xinfang Gold Deposit,Liaodong Peninsula:In-sights from Fluid Inclusions and S-Sr Isotopic Constraints

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Journal of Earth Science 2021年第1期32卷 68-80页

作者： Shuaijie Liu Bin Chen Jiahao Zheng Chuang Bao guochun zhao Department of Earth Sciences the University of Hong KongHong Kong 999077China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China

The North China Craton(NCC)has been continuously reactivated since the Mesozoic and this decratonization is responsible for its economically important gold mineralization in the *** Early Cretaceous(110-130 Ma)gold mineralization in the NCC has been well-studied due to its significance,but little attention has been given to other episodes of gold mineralization related to polyphased reactivation of the *** Xinfang mesozonal gold deposit(143 Ma)in the Liaodong Peninsula is related to the one of the episodes of the Yanshanian *** orebodies of the Xin-fang gold deposit were controlled by the low angle transpressive fault systems and hosted by the Neoarchean monzogranitic *** inclusion microthermometry reveals that the mineralizing temperatures range from 220 to 280℃,with salinities from 6 wt.%NaCl *** 15 wt.%NaCl eqv.,pressures from 199 to 321 *** S isotopic characteristics of sulfides not only record a heterogene-ous source including magmatic or gneissic sulfur but also record inter-mineral isotope *** initial^(87)Sr/^(86)Sr values of pyrite(0.713480-0.729031)indicate a radiogenic crustal origin for the *** metamorphic dehydration of the underlying basement resulted in the genesis of the Xin-fang gold *** summarize three episodes of gold mineralization in the Liaodong Peninsula re-lated to continuous reactivation of the NCC,which indicates a great exploration potential of this area.

关键词： Xinfang gold deposit fluid inclusion microthermometry in-situ S isotope Sr isotope multistage

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中亚造山带南蒙古地区石炭纪--二叠纪岩浆活动及其构造意义

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西北地质 2024年第3期57卷 11-28页

作者：吴妍蓉周海赵国春韩以贵张东海王盟赵少伟裴先治赵千 Narantsetseg Tserendash 耿红燕 Enkh-Orshikh Orsoo 长安大学地球科学与资源学院陕西西安710054 西北大学地质学系国家大陆动力学重点实验室陕西西安710069 香港大学地球科学系中国香港999077 三明学院国家公园研究中心福建三明365004 蒙古国国家科学院古生物与地质研究所乌兰巴托999097-15141 岭南大学科学教研组中国香港999077 马可波罗矿业有限公司乌兰巴托999097-15141

中亚造山带作为显生宙以来全球最大的增生型造山带,记录了古亚洲洋俯冲、增生、闭合的全过程。南蒙古地区位于中亚造山带南缘中段,其晚古生代先后发育弧岩浆活动以及与伸展活动相关的岩石组合,是研究陆壳增生和改造的热点区域。笔者结... 详细信息

中亚造山带作为显生宙以来全球最大的增生型造山带,记录了古亚洲洋俯冲、增生、闭合的全过程。南蒙古地区位于中亚造山带南缘中段,其晚古生代先后发育弧岩浆活动以及与伸展活动相关的岩石组合,是研究陆壳增生和改造的热点区域。笔者结合区域地质特征及前人研究对南蒙古地区石炭纪--二叠纪这一关键时期的岩石组合做出系统梳理和总结,研究区石炭纪--二叠纪岩浆活动大致可以分为早石炭世(350~325 Ma),晚石炭世(320~305 Ma)和早二叠世(300~280Ma)3个阶段。早石炭世(350~325Ma)发育典型的弧岩浆岩且具有向南变年轻的趋势。此外,全岩Nd和锆石Hf同位素显示其主体具有显著的地幔贡献。综合前人认识,笔者认为这是古亚洲洋主洋盆以北多个次生的弧后洋盆俯冲后撤的结果。晚石炭世(320~305Ma)以高硅花岗岩为主,尤其315~310Ma的碱长花岗岩、碱长正长岩等是年轻弧地体重熔的产物,是俯冲大洋板片显著消耗的结束。早二叠世(300~280Ma)发育伸展相关的岩石组合(如A型花岗岩、双峰式火山岩和基性岩墙),这些岩浆活动显示高温特征,且具有显著的地幔物质贡献。结合前人工作,特别是笔者的前期工作,上述岩浆活动是由石炭纪板片后撤之后高角度俯冲诱发的俯冲板片断离所造成,且前人研究成果表明南蒙古东西两侧均有类似的岩石、构造和沉积记录。因此,笔者提出,古亚洲洋主洋盆泥盆纪--二叠纪多期次的俯冲后撤导致了其北侧一系列次生的弧后洋盆的开启、俯冲至闭合,上述过程伴随了中亚造山带南缘最后一次大规模侧向增生及其结束后板片断离诱发的垂向地壳增生。

关键词：中亚造山带石炭纪—二叠纪岩浆活动构造演化南蒙古地区

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自然美育课程实践的路径探索——以“北戴河地质认识实习”课程为例

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中国地质教育 2024年第1期33卷 111-115页

作者：周全徐能雄张翃滔赵国春中国地质大学(北京)工程技术学院北京100083 中国地质大学(北京)党委学生工作部艺术教育中心北京100083 中国地质大学(北京)地球科学与资源学院北京100083

自然美育是美育工作体系的重要内容,积极拥抱自然美育思想,对引发美育教学方式的创新、全面加强高校美育教学工作有着重要意义。“北戴河地质认识实习”是中国地质大学(北京)为了配合本科生修完“地球科学概论”课程之后而设立的野外实... 详细信息

自然美育是美育工作体系的重要内容,积极拥抱自然美育思想,对引发美育教学方式的创新、全面加强高校美育教学工作有着重要意义。“北戴河地质认识实习”是中国地质大学(北京)为了配合本科生修完“地球科学概论”课程之后而设立的野外实践性课程,是创新型地学人才培养的必修环节。笔者通过深入研究人与自然和谐共生下的自然美育发展路径,结合我校野外地质实习特色,将自然审美教育与野外实习学习相融合,共同掀起打造人与自然和谐共生格局的新局面,为实现这一伟大愿景注入崭新动力。

关键词：自然美育人才培养学科融合课程实践地质实习

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Metamorphism of the northern Liaoning Complex:Implications for the tectonic evolution of Neoarchean basement of the Eastern Block,North China Craton

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Geoscience Frontiers 2013年第3期4卷 305-320页

作者： Kam Kuen Wu guochun zhao Min Sun Changqing Yin Yanhong He Pui Yuk Tam Department of Earth Sciences James Lee Science BuildingThe University of Hong Kong Department of Earth and Environmental Sciences University of Waterloo200 University Avenue WestWaterlooOntarioCanada Department of Geology North West University

As one of the areas where typical late Archean crust is exposed in the Eastern Block of the North China Craton, the northern Laioning Complex consists principally of tonalitic-trondhjemitic-granodioritic （TTG） gneisses, massive granitoids and supracrustal rocks. The supracrustal rocks, named the Qingyuan Group, consist of interbedded amphibolite, hornblende granulite, biotite granulite and BIF. Petrological evidence indicates that the amphibolites experienced the early prograde （M1）, peak （M2） and post-peak （M3） metamorphism. The early prograde assemblage （M1） is preserved as mineral inclusions, represented by actinotite ＋ hornblende - plagioclase ＋ epidote ＋ quartz 4- sphene, within garnet porphyroblasts. The peak assemblage （M2） is indicated by garnet ＋ clinopyroxene ＋ hornblende ＋ plagioclase ＋ quartz ＋ ilmenite, which occur as major mineral phases in the rock. The post-peak assemblage （M3） is characterized by the garnet 4- quartz symplectite. The P-T pseudosections in the NCFMASHTO system constructed by using THERMOCALC define the P-T conditions of M1, M2 and M3 at 490-550 C＋（4.5 kbar, 780 810 C/7.65- 8.40 kbar and 630-670 ＋C]8.15-9.40 kbar, respectively. As a result, an anticlockwise P-T path involving isobaric cooling is inferred for the metamorphic evolution of the amphibolites. Such a P-T path suggests that the late Archean metamorphism of the northern Liaoning Complex was related to the intrusion and underplating of mantle-derived magmas. The underplating of voluminous mantle-derived magmas leading to metamorphism with an anticlockwise P-T path involving isobaric cooling may have occurred in continental magmatic arc regions, above hot spots driven by mantle plumes, or in continental rift envi- ronments. A mantle plume model is favored because this model can reasonably interpret many other geological features of late Archean basement rocks from the northern Liaoning Complex in the Eastern Block of the North China Craton as well as their anticlockwise P-T pat

关键词： Amphibolites Northern Liaoning complex North China Craton Late Archean Metamorphic evolution

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LA-ICP-MS Zircon U-Pb Geochronology of the Fine-grained Granite and Molybdenite Re-Os Dating in the Wurinitu Molybdenum Deposit,Inner Mongolia,China

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Acta Geologica Sinica(English Edition) 2011年第5期85卷 1057-1066页

作者： Cui LIU Jinfu DENG Weiqiong KONG Liquan XU guochun zhao zhaohua LUO Ning LI State Key Laboratory of Geological Process and Mineral Resources China University of Geosciences (Beijing) Beijing 100083 China Graduate University of Chinese Academy of Sciences Beijing 100049 China The Fourth Institute of Geological and Mineral Exploration of Gansu Province Jiuquan Gansu 735000 China Geological Survey Institute of Inner Mongolia Hohhot Inner Mongolia 010020 China

The Wurinitu molybdenum deposit,located in Honggor,Sonid Left Banner of Inner Mongolia,China,is recently discovered and is considered to be associated with a concealed fine-grained granite impregnated with *** wall rocks are composed of Variscan porphyritic-like biotite granite and the Lower Ordovician Wubin'aobao ***-ICP-MS zircon U-Pb dating of the fine-grained granite reveals two stages of zircons,one were formed at 181.7±7.4 Ma and the other at 133.6±3.3 *** latter age is believed to be the formation age of the fine-grained granite,while the former may reflect the age of inherited zircons,based on the morphological study of the zircon and regional geological *** Re-Os model age of molybdenite is 142.2±2.5 Ma,which is older than the diagenetic age of the fine-grained *** the authors believe that the metallogenic age of the Wurinitu molybdenum deposit should be nearly 133.6±3.3 Ma or slightly later,i.e.,Early *** with regional geological background research,it is speculated that the molybdenum deposits were formed at the late Yanshanian orogenic cycle in the Hingganling-Mongolian orogenic belt,belonging to the relaxation epoch posterior to the compression and was associated with the closure of the Mongolia-Okhotsk Sea.

关键词： fine-grained granite LA-ICP-MS zircon U-Pb geochronology molybdenite Re-Os dating Wurinitu molybdenum deposit Inner Mongolia

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