Paleomagnetic Constraints on the Mesozoic Drift of the Lhasa Terrane (Tibet) from Gondwana to Eurasia
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Two Contrasting Phanerozoic Orogenic Systems Revealed by Hafnium Isotope Data William J
ARTICLES PUBLISHED ONLINE: 17 APRIL 2011 | DOI: 10.1038/NGEO1127 Two contrasting Phanerozoic orogenic systems revealed by hafnium isotope data William J. Collins1*(, Elena A. Belousova2, Anthony I. S. Kemp1 and J. Brendan Murphy3 Two fundamentally different orogenic systems have existed on Earth throughout the Phanerozoic. Circum-Pacific accretionary orogens are the external orogenic system formed around the Pacific rim, where oceanic lithosphere semicontinuously subducts beneath continental lithosphere. In contrast, the internal orogenic system is found in Europe and Asia as the collage of collisional mountain belts, formed during the collision between continental crustal fragments. External orogenic systems form at the boundary of large underlying mantle convection cells, whereas internal orogens form within one supercell. Here we present a compilation of hafnium isotope data from zircon minerals collected from orogens worldwide. We find that the range of hafnium isotope signatures for the external orogenic system narrows and trends towards more radiogenic compositions since 550 Myr ago. By contrast, the range of signatures from the internal orogenic system broadens since 550 Myr ago. We suggest that for the external system, the lower crust and lithospheric mantle beneath the overriding continent is removed during subduction and replaced by newly formed crust, which generates the radiogenic hafnium signature when remelted. For the internal orogenic system, the lower crust and lithospheric mantle is instead eventually replaced by more continental lithosphere from a collided continental fragment. Our suggested model provides a simple basis for unravelling the global geodynamic evolution of the ancient Earth. resent-day orogens of contrasting character can be reduced to which probably began by the Early Ordovician12, and the Early two types on Earth, dominantly accretionary or dominantly Paleozoic accretionary orogens in the easternmost Altaids of Pcollisional, because only the latter are associated with Wilson Asia13. -
Initial Growth of the Northern Lhasaplano, Tibetan Plateau in the Early Late Cretaceous (Ca
hu-B35124.1 2nd pages / 1 of 14 Initial growth of the Northern Lhasaplano in the early Late Cretaceous Initial growth of the Northern Lhasaplano, Tibetan Plateau in the early Late Cretaceous (ca. 92 Ma) Wen Lai1, Xiumian Hu1,†, Eduardo Garzanti2, Gaoyuan Sun1,3, Carmala N. Garzione4, Marcelle BouDagher Fadel5, and Anlin Ma1 1State Key Laboratory of Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China 2Department of Earth and Environmental Sciences, Università di Milano-Bicocca, Milano 20126, Italy 3College of Oceanography, Hohai University, Nanjing 210098, China 4Department of Earth and Environmental Sciences, University of Rochester, Rochester, New York 14627, USA 5Department of Geological Sciences, University College London, London WC1E6BT, UK ABSTRACT INTRODUCTION Stable isotopes in lacustrine carbonates suggest that the basins surrounding the Gangdese Moun Constraining the growth of the Tibetan The Tibetan Plateau, with an average ele tains in the southern Lhasa terrane had reached Plateau in time and space is critical for test- vation of ~5000 m, is the world’s highest and an elevation >4500 m since IndiaAsia collision ing geodynamic models and climatic changes widest orogenic plateau, and exerts a major in (Ding et al., 2014). Lowtemperature thermo at the regional and global scale. The Lhasa fluence on the Asian monsoon, global climate chronology reveal that the central and northern block is a key region for unraveling the early change, and regional distribution of living spe Lhasa terranes experienced rapid to moderate history of the Tibetan Plateau. Distinct from cies (Raymo and Ruddiman, 1992; Molnar et al., cooling and exhumation between 85 and 45 Ma the underlying shallow-marine limestones, 1993; An et al., 2001; DupontNivet et al., 2007; (Hetzel et al., 2011; Rohrmann et al., 2012). -
Post-Collisional Potassic Magmatism in the Eastern Lhasa Terrane, South Tibet: Products of Partial Melting of Mélanges in a Continental Subduction Channel
Gondwana Research 41 (2017) 9–28 Contents lists available at ScienceDirect Gondwana Research journal homepage: www.elsevier.com/locate/gr Post-collisional potassic magmatism in the eastern Lhasa terrane, South Tibet: Products of partial melting of mélanges in a continental subduction channel Lihong Zhang a,b, Zhengfu Guo a,⁎,MaoliangZhanga,b, Zhihui Cheng a,b, Yutao Sun a,b a Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China b University of Chinese Academy of Sciences, Beijing 100049, China article info abstract Article history: Post-collisional, potassic magmatic rocks widely distributed in the eastern Lhasa terrane provide significant Received 29 May 2015 information for comprehensive understanding of geodynamic processes of northward subduction of the Indian Received in revised form 18 October 2015 lithosphere and uplift of the Tibetan Plateau. A combined dataset of whole-rock major and trace elements, Accepted 3 November 2015 Sr–Nd–Pb isotopes, and in situ zircon U–Pb dating and Hf–O isotopic analyses are presented for the Yangying Available online 23 December 2015 potassic volcanic rocks (YPVR) in the eastern part of the Lhasa terrane, South Tibet. These volcanic rocks consist of trachytes, which are characterized by high K O(5.46–9.30 wt.%), SiO (61.34–68.62 wt.%) and Al O (15.06– Keywords: 2 2 2 3 – – Post-collisional potassic magmatism 17.36 wt.%), and relatively low MgO (0.47 2.80 wt.%) and FeOt (1.70 4.90 wt.%). Chondrite-normalized rare Zircon U–Pb dating earth elements (REE) patterns display clearly negative Eu anomalies. -
Himalaya - Southern-Tibet: the Typical Continent-Continent Collision Orogen
237 Himalaya - Southern-Tibet: the typical continent-continent collision orogen When an oceanic plate is subducted beneath a continental lithosphere, an Andean mountain range develops on the edge of the continent. If the subducting plate also contains some continental lithosphere, plate convergence eventually brings both continents into juxtaposition. While the oceanic lithosphere is relatively dense and sinks into the asthenosphere, the greater sialic content of the continental lithosphere ascribes positive buoyancy in the asthenosphere, which hinders the continental lithosphere to be subducted any great distance. Consequently, a continental lithosphere arriving at a trench will confront the overriding continent. Rapid relative convergence is halted and crustal shortening forms a collision mountain range. The plane marking the locus of collision is a suture, which usually preserves slivers of the oceanic lithosphere that formerly separated the continents, known as ophiolites. The collision between the Indian subcontinent and what is now Tibet began in the Eocene. It involved and still involves north-south convergence throughout southern Tibet and the Himalayas. This youthful mountain area is the type example for studies of continental collision processes. The Himalayas Location The Himalayas form a nearly 3000 km long, 250-350 km wide range between India to the south and the huge Tibetan plateau, with a mean elevation of 5000 m, to the north. The Himalayan mountain belt has a relatively simple, arcuate, and cylindrical geometry over most of its length and terminates at both ends in nearly transverse syntaxes, i.e. areas where orogenic structures turn sharply about a vertical axis. Both syntaxes are named after the main peaks that tower above them, the Namche Barwa (7756 m) to the east and the Nanga Parbat (8138 m) to the west, in Pakistan. -
Tectonic Evolution and High-Pressure Rock Exhumation in the Qiangtang Terrane, Central Tibet
Solid Earth, 6, 457–473, 2015 www.solid-earth.net/6/457/2015/ doi:10.5194/se-6-457-2015 © Author(s) 2015. CC Attribution 3.0 License. Tectonic evolution and high-pressure rock exhumation in the Qiangtang terrane, central Tibet Z. Zhao1,2, P. D. Bons1, G. Wang2, A. Soesoo3, and Y. Liu4 1Department of Geosciences, Eberhard Karls University Tübingen, Wilhelmstrasse 56, 72074 Tübingen, Germany 2School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China 3Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia 4State Key Laboratory for Continental Tectonics and Dynamics, Institute of Geology, CAGS, Beijing 100037, China Correspondence to: Z. Zhao ([email protected]) Received: 8 January 2015 – Published in Solid Earth Discuss.: 23 January 2015 Revised: 30 March 2015 – Accepted: 8 April 2015 – Published: 30 April 2015 Abstract. Conflicting interpretations of the > 500 km long, 1 Introduction east–west-trending Qiangtang metamorphic belt have led to very different and contradicting models for the Permo– Triassic tectonic evolution of central Tibet. We define two The Tibetan plateau is an amalgamation of terranes that were metamorphic events, one that only affected pre-Ordovician accreted to the southern margin of Eurasia during Phanero- basement rocks and one subduction-related Triassic high- zoic times (Yin and Harrison, 2000). From north to south, pressure metamorphism event. Detailed mapping and struc- these terranes are the Qilian Shan, Qaidam, Songpan–Ganzi tural analysis allowed us to define three main units that flysch complex, Qiangtang and Lhasa terranes (Fig. 1a). Ter- were juxtaposed due to collision of the north and south rane boundaries are defined by widely scattered belts of ophi- Qiangtang terranes after closure of the Ordovician–Triassic olitic fragments and mélanges with high-pressure rocks (Zhu ocean that separated them. -
Late Paleozoic and Mesozoic Evolution of the Lhasa Terrane in the Xainza MARK Area of Southern Tibet
Tectonophysics 721 (2017) 415–434 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Late Paleozoic and Mesozoic evolution of the Lhasa Terrane in the Xainza MARK area of southern Tibet ⁎ Suoya Fana,b, , Lin Dinga, Michael A. Murphyb, Wei Yaoa, An Yinc a Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China b Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, USA c Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095-1567, USA ARTICLE INFO ABSTRACT Keywords: Models for the Mesozoic growth of the Tibetan plateau describe closure of the Bangong Ocean resulting in Lhasa terrane accretion of the Lhasa terrane to the Qiangtang terrane along the Bangong-Nuijiang suture zone (BNSZ). Shortening However, a more complex history is suggested by studies of ophiolitic melanges south of the BNSZ “within” the Foreland basin Lhasa terrane. One such mélange belt is the Shiquanhe-Namu Co mélange zone (SNMZ) that is coincident with Suture zone the Geren Co-Namu Co thrust (GNT). To better understand the structure, age, and provenance of rocks exposed Provenance along the SNMZ we conducted geologic mapping, sandstone petrography, and U-Pb zircon geochronology of Geochronology rocks straddling the SNMZ. The GNT is north-directed and places Paleozoic strata against the Yongzhu ophiolite and Cretaceous strata along strike. A gabbro in the Yongzhu ophiolite yielded a U-Pb zircon age of 153 Ma. Detrital zircon age data from Permian rocks in the hanging wall suggests that the Lhasa terrane has affinity with the Himalaya and Qiangtang, rather than northwest Australia. -
Lhasa Terrane in Southern Tibet Came from Australia
Lhasa terrane in southern Tibet came from Australia Di-Cheng Zhu1*, Zhi-Dan Zhao1, Yaoling Niu1,2,3, Yildirim Dilek4, and Xuan-Xue Mo1 1State Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China 2School of Earth Sciences, Lanzhou University, Lanzhou 730000, China 3Department of Earth Sciences, Durham University, Durham DH1 3LE, UK 4Department of Geology, Miami University, Oxford, Ohio 45056, USA ABSTRACT REGIONAL GEOLOGY AND DETRITAL The U-Pb age and Hf isotope data on detrital zircons from Paleozoic metasedimentary rocks ZIRCON ANALYSES ε in the Lhasa terrane (Tibet) defi ne a distinctive age population of ca. 1170 Ma with Hf(t) values The Lhasa terrane is one of the three large identical to the coeval detrital zircons from Western Australia, but those from the western east-west−trending tectonic belts in the Tibetan Qiangtang and Tethyan Himalaya terranes defi ne an age population of ca. 950 Ma with a similar Plateau. It is located between the Qiangtang ε Hf(t) range. The ca. 1170 Ma detrital zircons in the Lhasa terrane were most likely derived from and Tethyan Himalayan terranes, bounded by the Albany-Fraser belt in southwest Australia, whereas the ca. 950 Ma detrital zircons from both the Bangong-Nujiang suture zone to the north the western Qiangtang and Tethyan Himalaya terranes might have been sourced from the High and the Indus–Yarlung Zangbo suture zone to Himalaya to the south. Such detrital zircon connections enable us to propose that the Lhasa the south, respectively (Fig. -
A Middle Eocene Lowland Humid Subtropical “Shangri-La” Ecosystem in Central Tibet
A Middle Eocene lowland humid subtropical “Shangri-La” ecosystem in central Tibet Tao Sua,b,c,1, Robert A. Spicera,d, Fei-Xiang Wue,f, Alexander Farnsworthg, Jian Huanga,b, Cédric Del Rioa, Tao Dengc,e,f, Lin Dingh,i, Wei-Yu-Dong Denga,c, Yong-Jiang Huangj, Alice Hughesk, Lin-Bo Jiaj, Jian-Hua Jinl, Shu-Feng Lia,b, Shui-Qing Liangm, Jia Liua,b, Xiao-Yan Liun, Sarah Sherlockd, Teresa Spicera, Gaurav Srivastavao, He Tanga,c, Paul Valdesg, Teng-Xiang Wanga,c, Mike Widdowsonp, Meng-Xiao Wua,c, Yao-Wu Xinga,b, Cong-Li Xua, Jian Yangq, Cong Zhangr, Shi-Tao Zhangs, Xin-Wen Zhanga,c, Fan Zhaoa, and Zhe-Kun Zhoua,b,j,1 aCAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China; bCenter of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla 666303, China; cUniversity of Chinese Academy of Sciences, 100049 Beijing, China; dSchool of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes, MK7 6AA, United Kingdom; eKey Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 100044 Beijing, China; fCenter for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, 100101 Beijing, China; gSchool of Geographical Sciences and Cabot Institute, University of Bristol, Bristol, BS8 1TH, United Kingdom; hCAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, 100101 Beijing, China; iKey Laboratory of -
Cambrian Ultrapotassic Rhyolites from the Lhasa Terrane, South Tibet: Evidence for Andean-Type Magmatism Along the Northern Active Margin of Gondwana
GR-01218; No of Pages 14 Gondwana Research xxx (2014) xxx–xxx Contents lists available at ScienceDirect Gondwana Research journal homepage: www.elsevier.com/locate/gr Cambrian ultrapotassic rhyolites from the Lhasa terrane, south Tibet: Evidence for Andean-type magmatism along the northern active margin of Gondwana Huixia Ding a,ZemingZhanga,⁎, Xin Dong a,RongYana,YanhaoLinb,HongyingJiangc a State Key Laboratory of Continental Tectonic and Dynamics, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China b Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China c School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China article info abstract Article history: The petrogenesis and tectonic significance of early Paleozoic magmatic rocks in south Tibet is debated. In this Received 27 August 2013 paper, we report Cambrian ultrapotassic felsic volcanics from the Lhasa terrane. Petrographic and whole-rock Received in revised form 25 January 2014 geochemical studies indicate that these rocks are rhyolite and rhyolitic ignimbrite, and have varying SiO2 Accepted 17 February 2014 (69.56–82.09 wt.%), Al O (9.52–16.61 wt.%) and Fe Ot (1.0–7.9 wt.%). The rocks are ultrapotassic (high K O Available online xxxx 2 3 2 3 2 4.19–6.90 wt.%, and very low Na2O0.01–0.06 wt.%) and peraluminous (A/CNK = 1.41–2.22). They are enriched Handling Editor: M. Santosh in Rb, Th, U, Pb, Zr and Y, and showed negative Ba, Sr, P, Nb, Ta and Ti anomalies, and slightly fractionated REE patterns with moderately negative Eu anomalies, typical of A-type granitoids. -
Tectonic Evolution of the Qiangtang Terrane, Central Tibetan Plateau
Tectonic evolution of the Qiangtang terrane, Central Tibetan Plateau Zhao Zhongbao Eberhard Karls Universität Tübingen Structural Geology Group 2015 Tectonic evolution of the Qiangtang terrane, central Tibetan Plateau Dissertation der Mathematisch-Naturwissenschaftlichen Fakultät der Eberhard Karls Universität Tübingen zur Erlangung des Grades eines Doktors der Naturwissenschaften (Dr. rer. nat.) vorgelegt von Zhongbao Zhao aus Shanxi, China Tübingen, 2015 Erklärung Ich erkläre hiermit, dass ich die zur Promotion eingereichte Arbeit selbständig verfasst, nur die angegebenen Quellen und Hilfsmittel benutzt und wörtlich oder inhaltlich übernommene Stellen als solche gekennzeichnet habe. Ich erkläre, dass die Richtlinien zur Sicherung guter wissenschaftlicher Praxis der Universität Tübingen (Beschluss des Senats vom 25.5.2000) beachtet wurden. Ich versichere an Eides statt, dass diese Angaben wahr sind und dass ich nichts verschwiegen habe. Mir ist bekannt, dass die falsche Abgabe einer Versicherung an Eides statt mit Freiheitsstrafe bis zu drei Jahren oder mit Geldstrafe bestraft wird. Tübingen, June 2015 Datum der mündlichen Prüfung: 28th. August 2015 Dekan: Prof. Dr. Wolfgang Rosenstiel 1. Berichterstatter: Prof. Dr. Paul D Bons 2. Berichterstatter: Prof. Dr. Genhou Wang II Thesis organization and list of publications This PhD-thesis is organized in a cumulative manner. It is separated into 6 chapters. Here, the general organization of the thesis and a list of included publications are given. Chapter 1 presents an introduction covering the context and the main ideas of the thesis. In Chapter 2-4 three different research papers which were published in the framework of the present study are represented. Chapter 5 represents results from (U-Th)/He thermochronology that are going to be a paper written for concerning on Cretaceous uplifting and shortening of Qiangtang terrane. -
Crustal–Lithospheric Structure and Continental Extrusion of Tibet
Journal of the Geological Society, London, Vol. 168, 2011, pp. 633–672. doi: 10.1144/0016-76492010-139. Crustal–lithospheric structure and continental extrusion of Tibet M. P. SEARLE1*, J. R. ELLIOTT1,R.J.PHILLIPS2 & S.-L. CHUNG3 1Department of Earth Sciences, Oxford University, South Parks Road, Oxford OX1 3AN, UK 2Institute of Geophysics and Tectonics, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK 3Department of Geosciences, National Taiwan University, Taipei 106, Taiwan *Corresponding author (e-mail: [email protected]) Abstract: Crustal shortening and thickening to c. 70–85 km in the Tibetan Plateau occurred both before and mainly after the c. 50 Ma India–Asia collision. Potassic–ultrapotassic shoshonitic and adakitic lavas erupted across the Qiangtang (c. 50–29 Ma) and Lhasa blocks (c. 30–10 Ma) indicate a hot mantle, thick crust and eclogitic root during that period. The progressive northward underthrusting of cold, Indian mantle lithosphere since collision shut off the source in the Lhasa block at c. 10 Ma. Late Miocene–Pleistocene shoshonitic volcanic rocks in northern Tibet require hot mantle. We review the major tectonic processes proposed for Tibet including ‘rigid-block’, continuum and crustal flow as well as the geological history of the major strike- slip faults. We examine controversies concerning the cumulative geological offsets and the discrepancies between geological, Quaternary and geodetic slip rates. Low present-day slip rates measured from global positioning system and InSAR along the Karakoram and Altyn Tagh Faults in addition to slow long-term geological rates can only account for limited eastward extrusion of Tibet since Mid-Miocene time. -
Initial Rifting of the Lhasa Terrane from Gondwana
RESEARCH ARTICLE Initial Rifting of the Lhasa Terrane from Gondwana: 10.1029/2018JB016281 Insights From the Permian (~262 Ma) Amphibole‐ Key Points: ‐ • The Yawa intrusion is the first Rich Lithospheric Mantle Derived Yawa known Permian within‐plate rocks for the Lhasa Terrane Basanitic Intrusions in Southern Tibet • The Yawa intrusions were derived Yun‐Chuan Zeng1,2,Ji‐Feng Xu1,3 , Mihai N. Ducea2,4 , Jian‐Lin Chen3,5, Feng Huang1, by partial melting of an 3 amphibole‐rich lithospheric mantle and Le Zhang • Initial rifting of Lhasa Terrane 1 from the Gondwana began at late State Key Laboratory of Geological Processes and Mineral Resources, and School of Earth Science and Resources, China Middle Permian (~262 Ma) University of Geosciences, Beijing, China, 2Department of Geosciences, University of Arizona, Tucson, AZ, USA, 3State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Supporting Information: Guangzhou, China, 4Faculty of Geology and Geophysics, University of Bucharest, Bucharest, Romania, 5CAS Center for • Supporting Information S1 Excellence in Tibetan Plateau Earth Sciences, Beijing, China Correspondence to: Abstract The Permian tectonic setting of the Lhasa Terrane in southern Tibet remains controversial ‐ J. F. Xu, (i.e., continental rift vs. subduction‐collision) and is crucial to palinspastic reconstructions of the eastern [email protected]; [email protected] Tethys during the breakup of Gondwana. In this study, we present new geochronological, geochemical, and mineralogical data for the Permian (~262 Ma) Yawa intrusions in the southern Lhasa Terrane. These rocks are silica‐undersaturated and alkaline, with high TiO2 and moderate MgO, and exhibit enrichments in Th, Citation: ‐ Zeng, Y.‐C., Xu, J.‐F., Ducea, M.