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Late Mesozoic tectonostratigraphic division and correlation of the Bohai Bay basin: Implications for the Yanshanian orogeny

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Science China Earth Sciences 2019年第11期62卷 1783-1804页

作者： Jichang ZHU Youliang FENG Qing-Ren MENG Fengcheng WU Hao LI Haitao LIU Feipeng ZHANG Tianyu WANG Guoli WU Caineng ZOU Rixiang ZHU Institute of Geology and Geophysics CASBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Innovation Academy for Earth Science CASBeijing 100029China PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China Institute of Sinopec Exploration and Development Research Beijing 100083China School of Geosciences China University of PetroleumQingdao 266580China

We present the results of Mesozoic sequences of the Bohai Bay basin in North China, based mainly on geochronology and interpretations of seismic profiles and logging data. Five tectono-stratigraphic sequences are defined: Lower-Middle Triassic, Lower-Middle Jurassic, Upper Jurassic, Lower Cretaceous and Upper Cretaceous. Based on an analysis of detrital zircons, the clastic rocks recorded two intervals of Jurassic magmatic activity, during 180–175 and 160–152 Ma, which can be correlated to the Nandaling and Tiaojishan Formations in the Yanshan area, respectively. However, since Jurassic volcanic rocks have not yet been found in the Bohai Bay basin, we speculate that these two stages of activity were mainly concentrated around the periphery of the North China Craton(NCC) rather than within. Based on an analysis of zircons from volcanic rocks and pyroclastics, the early Cretaceous magmatism in the Bohai Bay basin can be divided into two stages, 125–120 and 110–100 Ma,which can be correlated to magmatism in the eastern part of the NCC. The zircon ages indicate an absence of volcanic activity during the late Tuchengzi and Zhangjiakou periods which may correlate to the uplift of the Bohai Bay basin in the late Late Jurassic. Comparison of the development of Mesozoic basins and sedimentary strata in the central-eastern part of Yanshan tectonic belt and the the Bohai Bay basin indicates that the two areas are generally comparable, but with substantial differences.The central-eastern part of the Yanshan structural belt lacks Early-Middle Triassic strata, and the Bohai Bay basin lacks late Jurassic-early Cretaceous strata. Based on research results from late Mesozoic sedimentary structures in the central and eastern parts of the Yanshan tectonic belt, we infer that episode A of the Yanshanian orogeny was weak in the Bohai Bay basin and its periphery, while episode B of the Yanshanian orogeny had a strong influence on the Bohai Bay basin and its periphery. The available data reveal differences in the expression of these ep

关键词： Yanshanian orogeny Late Mesozoic Central-eastern part of Yanshan tectonic belt The Bohai Bay basin Tectonostratigraphic division

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The Yanshan orogeny and late Mesozoic multi-plate convergence in East Asia—Commemorating 90th years of the “Yanshan orogeny”

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Science China Earth Sciences 2018年第12期61卷 1888-1909页

作者： Shuwen DONG Yueqiao ZHANG Hailong LI Wei SHI Huaimin XUE Jianhua LI Shiqi HUANG Yongchao WANG School of Earth Sciences and Engineering Nanjing University Sinoprobe Center Chinese Academy of Geological Sciences Institute of Geomechanics Chinese Academy of Geological Sciences Institute of Geology Chinese Academy of Geological Sciences

The Yanshan movement/orogeny has been proposed for 90 years, which is of special significance in the history of geological research in China. This study conducted a review by synthesizing major achievements regarding episodic deformation features, sedimentary and magmatic records of the Yanshan orogeny in China, and clarified the episodic tectono-magmatism and its geodynamic origins. The tectonic implications of the Yanshan orogeny are discussed in the context of global plate tectonics and supercontinent reconstruction. Lines of evidence from structural, sedimentary and magmatic data suggest that the Yanshan orogeny represents a regional-scale tectonic event that affected the entire China continent in late Mesozoic period. Numerous age and structural constraints consistently indicate that the Yanshan orogeny was initiated in the Jurassic(at ～170±5 Ma). and was characterized by alternating stages of crustal shortening at ～170–136 Ma, crustal extension at ～135–90 Ma, and weak shortening at ～80 Ma. The 170–136 Ma crustal shortening was reflected in the generation of two regional stratigraphic unconformities(the Tiaojishan and Zhangjiakou unconformities), which were initially named the A and B episodes of "the Yanshan orogeny" by Mr.Wong Wenhao in 1928. Geodynamically, the Yanshan orogeny in East Asia was associated with nearly coeval oceanic subduction and continental convergence in the Paleo-Pacific, Neo-Tethys, and Mongol-Okhotsk tectonic domains. As a consequence, three giant accretionary-collisional tectonic systems were formed along the continental margins of East Asia, i.e., the Mongol-Okhotsk, Bangonghu-Nujiang, and SE China subduction-and collision-related accretionary systems. The Yanshan orogeny induced widespread crustal-scale folding and thrusting, tectonic reactivation of long-lived zones of crustal weakness,and extensive magmatism and mineralization in intraplate regions. Based on the time principle of supercontinent assembly and break-up, we propose that the mid-Late Jurassic multi-plate convergence i

关键词： Yanshan orogeny Mid-Late Jurassic East Asia plate convergence Intracontinental orogeny Amasia supercontinent

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Ordovician graptolite-bearing strata in southern Jiangxi with a special reference to the Kwangsian orogeny

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Science China Earth Sciences 2010年第11期53卷 1602-1610页

作者： Xu Chen YuanDong Zhang JunXuan Fan JunFeng Cheng QiJian Li Chinese Acad Sci Nanjing Inst Geol & Palaeontol State Key Lab Palaeobiol & Stratig Nanjing 210008 Peoples R China

The Ordovician graptolite sequence of the Yongxin-Chongyi area in southern Jiangxi was suggested as a standard for the correlation of Ordovician in the Zhujiang region of South China. Based on a restudy of the Upper Ordovician graptolites, the Shikou and Huamianlong formations are recognized herein as a part of the Hanjiang Formation, corresponding only to the Dipla-canthograptus caudatus-Diplacanthograptus spiniferus Zone. Two graptolite zones in the Longxi Formation of Yongxin and Chongyi, the Nemagraptus gracilis Zone and Climacograptus bicornis Zone, are redefined here. A rapid replacement of facies from the typical deep-water graptolitic black shale of Longxi Formation to the rapidly-accumulated, shallow-water clastic deposits of Hanjiang Formation indicates the tectonic initiation of the Kwangsian orogeny. The thick clastic deposits of the Han-jiang Formation are proposed to come from a nearby source area that rose during the Kwangsian orogeny. The D. caudatus-D. spiniferus graptolite Zone of the Hanjiang Formation indicates the initiation time of this tectonic event.

关键词： Longxi Formation Hanjiang Formation Sandbian Ordovician graptolite Kwangsian orogeny

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Inversion of two-phase extensional basin systems during subduction of the Paleo-Pacific Plate in the SW Korean Peninsula:Implication for the Mesozoic “Laramide-style” orogeny along East Asian continental margin

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Geoscience Frontiers 2019年第3期10卷 909-925页

作者： Seung-Ik Park Jungrae Noh Hee Jun Cheong Sanghoon Kwon Yungoo Song Sung Won Kim M.Santosh Department of Geology Kyungpook National University Department of Earth System Sciences Yonsei University School of Earth Sciences The Ohio State University Geology Division Korea Institute of Geoscience and Mineral Resources School of Earth Sciences and Resources China University of Geosciences Department of Earth Sciences University of Adelaide

During subduction, continental margins experience shortening along with inversion of extensional sedimentary basins. Here we explore a tectonic scenario for the inversion of two-phase extensional basin systems, where the Early-Middle Jurassic intra-arc volcano-sedimentary Oseosan Volcanic Complex was developed on top of the Late Triassic-Early Jurassic post-collisional sequences, namely the Chungnam Basin. The basin shortening was accommodated mostly by contractional faults and related folds. In the basement, regional high-angle reverse faults as well as low-angle thrusts accommodate the overall shortening, and are compatible with those preserved in the cover. This suggests that their spatial and temporal development is strongly dependent on the initial basin geometry and inherited structures.Changes in transport direction observed along the basement-sedimentary cover interface is a characteristic structural feature, reflecting sequential kinematic evolution during basin inversion. Propagation of basement faults also enhanced shortening of the overlying sedimentary cover sequences. We constrain timing of the Late Jurassic-Early Cretaceous(ca. 158-110 Ma) inversion from altered K-feldspar 40 Ar/39 Ar ages in stacked thrust sheets and K-Ar illite ages of fault gouges, along with previously reported geochronological data from the area. This "non-magmatic phase" of the Daebo orogeny is contemporaneous with the timing of magmatic quiescence across the Korean Peninsula. We propose the role of flat/low-angle subduction of the Paleo-Pacific Plate for the development of the "Laramide-style" basement-involved orogenic event along East Asian continental margin.

关键词： Two-phase extensional basin systems Paleo-Pacific Plate Inversion tectonics “Laramide-style” orogeny East Asian continental margin

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Small-scale upper mantle convection and orogeny of Tianshan Mountains in China

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Science China Earth Sciences 2007年第8期50卷 1142-1149页

作者： LIU Jie LIU QiYuan GUO Biao SONG HuiZhen State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China

In this study, from the travel time data recorded in the Tianshan passive seismic array experiment, we present the P-wave velocity structure of the upper mantle down to 660 km along the Kuqa-Kuitun pro-file in terms of seismic tomography technique. Based on the P-wave velocity model, we derive the corresponding 2D upper mantle density model. The 2D small-scale convection of the upper mantle underneath the Tianshan Mountains in China driven by the density anomalies is simulated using the hybrid finite element method combining with the marker-in-cell technique. The main features of the upper mantle convection and the reciprocation between the convection and mountain building are in-vestigated. The results manifest that (1) in the upper mantle underneath the Junggar basin and North Tianshan exists a counterclockwise convection, which scale is ~ 500 km; (2) underneath the Tarim ba-sin and South Tianshan exists a clockwise northward convection, which is relatively weak; (3) the convective velocity at the top of the upper mantle underneath the Tianshan Mountains in China should not be less than 20 mm/a, while considering the dependent of convective velocity on the viscosity; (4) the northward extrusion of the Tarim block plays a key role in the Cenozoic Tianshan mountain building and the present-day tectonic deformation of the Tianshan range is related closely to the upper mantle convection; and (5) the northward subduction of the Tarim block does not influence obviously the up-per mantle convection.

关键词： Tianshan orogeny mantle convection orogeny finite element method marker-in-cell method

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How many subductions in the Variscan orogeny?Insights from numerical models

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Geoscience Frontiers 2020年第3期11卷 1025-1052页

作者： Alessandro Regorda Jean-Marc Lardeaux Manuel Roda Anna Maria Marotta Maria Iole Spalla Universita Degli Studi di Milano Dipartimento di Scienze Della Terra'A.Desio’Via Mangiagalli 34I-20133MilanoItaly Universite Nice Sophia-Antipolis UMR Geoazur250 Rue A.EinsteinSophia-Antipolis06560ValbonneFrance

We developed a 2 D numerical model to simulate the evolution of two superposed ocean-continent-ocean subduction cycles with opposite vergence,both followed by continental collision,aiming to better understand the evolution of the Variscan belt.Three models with different velocities of the first oceanic subduction have been implemented.Striking differences in the thermo-mechanical evolution between the first subduction,which activates in an unperturbed system,and the second subduction,characterised by an opposite vergence,have been enlighten,in particular regarding the temperature in the mantle wedge and in the interior of the slab.Pressure and temperature(P-T) conditions predicted by one cycle and two cycles models have been compared with natural P-T estimates of the Variscan metamorphism from the Alps and from the French Massif Central(FMC).The comparative analysis supports that a slow and hot subduction well reproduces the P-T conditions compatible with data from the FMC,while P-T conditions compatible with data of Variscan metamorphism from the Alps can be reproduced by either a cold or hot oceanic subduction models.Analysing the agreement of both double and single subduction models with natural P-T estimates,we observed that polycyclic models better describe the evolution of the Variscan orogeny.

关键词： Alps Double subduction French Massif Central Numerical modelling Variscan orogeny

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Zircon geochronology reveals polyphase magmatism and crustal anatexis in the Buchan Block,NE Scotland:Implications for the Grampian orogeny

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Geoscience Frontiers 2017年第6期8卷 1469-1478页

作者： T.E.Johnson C.L.Kirkland D.R.Viete S.Fischer S.M.Reddy N.J.Evans B.J.McDonald Department of Applied Geology The Institute for Geoscience Research(TIGeR)CET-Curtin NodeJohn de Laeter CentreCurtin UniversityPerthWA 6102Australia Morton K.Blaustein Department of Earth&Planetary Sciences Johns Hopkins UniversityOlin Hall3400 N Charles StreetBaltimoreMD 21218USA School of Earth&Environmental Science University of St AndrewsIrvine BuildingNorth StreetSt AndrewsKY16 9ALScotlandUK

The type locality for high-temperature,low-pressure regional metamorphism,the Buchan Block in NE Scotland,exhibits profound differences to the rest of the Grampian Terrane.These differences have led some to regard the Buchan Block as an exotic crustal fragment comprising Precambrian basement gneisses and cover rocks thrust into their current position during Grampian orogenesis.Although rocks of the Buchan Block are now generally correlated with Dalradian strata elsewhere,the origin of the gneisses and the cause of the high heat flow and associated magmatism is debated.We report SIMS U-Pb and LA-ICPMS Hf isotopic data in zircon from high-grade rocks from the northeast(Inzie Head Gneiss)and northwest(Portsoy)corners of the Buchan Block.Around Inzie Head,upper amphibolite to granulite facies metasedimentary gneisses coexist with diorite sheets that were emplaced contemporaneously with partial melting of their host rocks,at least locally.U-Pb geochronology indicates a crystallisation age for the diorite of 486±9 Ma.Highly-deformed diorites within the Portsoy Gabbro have a crystallisation age of 493±8 Ma.Ages of ca.490 Ma for magmatism and high-grade metamorphism,which are broadly contemporaneous with ophiolite obduction and the onset of orogenesis,are significantly older than the established peak of Grampian metamorphism(ca.470 Ma).We propose a new model for the Grampian orogeny involving punctuated tectonothermal activity due to tectonic switching during accretionary orogenesis.Rollback of a NW-dipping subduction zone at ca.490 Ma produced a back-arc environment(the Buchan Block)with associated arc magmatism and high dT/dP metamorphism.Arrival of an outboard arc resulted in shortening(the initial phase of the Grampian orogeny)at ca.488 Ma.Rollback of a NW-dipping subduction zone to the SE of the ca.488 Ma suture began at 473 Ma and led to lithospheric-scale extension,decompression melting and advective heating of the middle crust,producing the widespread ca.470 Ma Grampian(classic Barrovian and Buchan)regional metam

关键词： Dalradian Grampian orogeny Buchan Block Zircon geochronology Magmatism Metamorphism

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Reinterpretation of the Guangxian orogeny

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Chinese Science Bulletin 2000年第13期45卷 1244-1248页

作者： WU HaoruoInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China

The Guangxian orogeny, as an important concept on geology of South China, was created 70 years ago. It is generally regarded as an erogenic movement caused by the convergence of the Cathaysian and Yangtze blocks at the end of Silurian. Based on the recent progress of the geological research on Guangxi and adjacent areas, western Guangxi and Liuzhou-Heshan area of central Guangxi may belong to a stable block of Early Paleozoic. The Guangxian orogeny originated from the northward translation of the Yunkai Block on its south at the end of Cambrian, and formed the Damingshan-Dayaoshan fold belt between the two blocks. It was possibly related with the Late Pan-African orogeny. The convergence of the Cathaysian and Yangtze blocks occurred in Late Ordovician to Early Silurian and mainly had effect on Hunan and Jiangxi provinces. The term 'Chongyu orogeny' may be suitable for it. At the end of Silurian orogenic movement did not occur in this area.

关键词： South China tectonics Paleozoic Guangxian orogeny Yunan orogeny Chongyu orogeny.

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The orogeny in the Altaides

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Acta Geologica Sinica(English Edition) 1993年第1期67卷 1-15页

作者： Qu Guosheng Institute of Geology, State Seismological Bureau, Beijing and He Guoqi Department of Geology, Peking University, Beijing Liu Linqun Institute of Geology State Seismological Bureau Beijing China

Studies of the deformation styles, formation types and isotopic age data indicate that the Altaides has successively experienced 5 stages of orogeny: (1) the Kanas orogeny forming the angular unconformity between the Baihaba Formation (O_3) and the Habahe Group (Z-O_2); (2) the Daqiao orogeny (S_3-D_(1-2) giving rise to the early Hercynian quasi-aulacogen extensional continental crust of the area; (3) the Altay orogeny (middle-late Hercynian) leading to the oblique intracontinentai collision and the formation of large shear arc-shaped thrust system and representing a strong orogeny stage; (4) the pan-Altay orogeny (latest Hercynian-Indosinian) resulting in the uplifting and erosion of the mountains as a whole; (5) the Himalayan movement causing the rejuvenation of fault systems and block uplift of the Aitaides since the Cenozoic.

关键词： Altaides orogeny

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Zircon U-Pb age of Fengxian acid pyroclastic rocks and its enlightenment to the existence of Pan-African orogeny in the West Qinling Orogenic Belt, China

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China Geology 2019年第4期2卷 557-559页

作者： Yong Wang Yong-hong Shi Bai-lin Chen Ren-wen Tan Yun Gao Jing-hui Shen Laboratory of Dynamic Digenesis and Metallogenesis Institute of GeomechanicsChinese Academy of Geological SciencesBeijing 100081China China University of Geoscience(Beijing) Beijing 100083China China University of Geoscience Wuhan 430074China

1.Objective The formation of East Gondwana and its combination with West Gondwana is a result of a series of complex orogenic events,known as Pan-African orogeny.The Northern Qinling Mountain is a microcontinent that formed on the ancient oceanic crust in the northern of Yangtze craton before Neoproterozoic.It is likely that the North Qinling,even the Yangtze craton and its surrounding oceanic crust belong to the ancient Gondwana tectonic domain and be a part of East Gondwana supercontinent(Chen Q,2007).

关键词： Qinling Yangtze orogeny

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