Abstract
The Longmenshan thrust belt (LMTB) is one of the best natural laboratories for thin-skinned tectonics and has developed a series of NE-SW trending fold-and-thrust structures represented by a series of nappes and klippes, exemplified by the Tangbazi and Bailuding klippe. However, the timing and emplacement mechanism of these klippes are still in dispute. Three possible mechanisms have been proposed: (1) a Mesozoic-Cenozoic southeastward thrusting, (2) a Cenozoic gravity gliding, and (3) glacial deposition. Almost all of these klippes are tectonic and overlaid on folded Late Triassic sandstone except the Tangbazi klippe, which is located in the center of the LMTB and has a narrow tail extending southeastward and covering Jurassic-Quaternary rocks. This geometric relationship is considered the most important stratigraphic evidence to support the post-Cenozoic emplacement of the Longmenshan klippe. Our structural and petrological observations show that the rocks at the front of the Tangbazi and Bailuding structures are brecciated limestone, which is assumed to have been generated by a gravitational collapse and is not characteristic of the massive Permian strata. Artemisia pollen, which has been exclusively recognized in post-Late Eocene strata in Central Asia, was found in the matrix of this brecciated limestone. Therefore, our discovery indicates that the brecciated limestone was deposited after the Late Eocene rather than during the Permian as annotated on the geological map. In contrast, unbrecciated, massive Permian limestone overlaid on the folded Late Triassic rocks. Hence, the anomalous relationship of Permian strata overlaying Late Triassic rocks cannot be evidence of Cenozoic emplacement. According to currently recognized bulk strata relationships, we can only be sure that the klippe was emplaced in the post Late Triassic. The petrological characteristics of the brecciated limestone show that it was crumbled before the re-sedimentation of the breccia, implying that the LMTB might have experienced a rapid uplift during the Late Eocene.
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References
BGMRSP (Bureau of Geoloy and Mineral Resources of Sichuan Province. 1991. Regional Geology of Sichuan Province (in Chinese). Beijing: Geological Publishing House. 730
Bian Z X. 1980. Indonesian tectonic characteristics of the Longmenshan, Sichuan Province (in Chinese with English abstract). Sichuan Acta Geol Sin, 1: 1–10
Burchfiel B C, Chen Z L, Liu Y P, Royden L H. 1995. Tectonics of the Longmen Shan and adjacent regions, Central China. Int Geol Rev, 37: 661–735
Chen S F, Wilson C J, Deng Q D, Zhao, X L, Luo, Z L. 1994a. Active faulting and block movement associated with large earthquakes in the Min Shan and Longmen Mountains, northeastern Tibetan Plateau. J Geophys Res, 99: 24025–24038
Chen S F, Wilson C J, Luo Z L, Deng Q D. 1994b. The evolution of the western Sichuan foreland basin, Southwestern China. J Southeast Asian Earth Sci, 10: 159–168
Chen S F, Wilson C J. 1996. Emplacement of the Longmen Shan Thrust-Nappe Belt along the eastern margin of the Tibetan Plateau. J Struct Geol, 18: 413–429
Clark M K, Royden L H. 2000. Topographic ooze: Building the eastern margin of Tibet by lower crustal flow. Geology, 28: 703–706
Dirks P H, Wilson C J, Chen S F, Luo Z L, Liu S. 1994. Tectonic evolution of the NE margin of the Tibetan Plateau: Evidence from the central Longmen Mountains, Sichuan Province, China. J Southeast Asian Earth Sci, 9: 181–192
Han J H, Li Z Q, Wang D Y. 2009. Identification of the Qingping overlapping klippe in the middle Longmen Mountains, China (in Chinese with English abstract). J Chendu Univ Technol (Sci Tech), 36: 305–310
Han J H, Wang D Y, Li Z Q. 2008. Structural deformation and genetic mechanism of the Qingping klippe in central Longmen Mountains (in Chinese with English abstract). Sediment Geol Thethy Geol, 28: 8–14
Han J H. 2006. Discussions on the klippes in the Longmen Mountains (in Chinese with English abstract). Sediment Geol Thethy Geol, 26: 55–59
Han T L, He Y W, Zhou Z L. 1994. A New consideration on the Pengxian “Klippe” in Sichuan (in Chinese with English abstract). Bull Chin Acad Geol Sci, 29: 133–135
Han T L, Lao X, Chen S P, Guo K Y, Zhou Z L, Peng D L. 1999. Discovery and significance of a huge glacial boulder in Gexianshan, Pengzhou, Sichuan (in Chinese with English abstract). Regional Geol Chin, 18: 60–68
Harrowfield M J, Wilson C J. 2005. Indosinian deformation of the Songpan Garzê fold belt, northeast Tibetan Plateau. J Struct Geol, 27: 101–117
He Y W. 1992. The age of formation of the Chengdu Basin and features of its early deposits (in Chinese with English abstract). Geol Rev, 38: 149–156
Huang M G, Maas R, Buick I S, Williams I S. 2003. Crustal response to continental collisions between the Tibet, Indian, South China and North China blocks: Geochronological constraints from the Songpan-Garze orogenic belt, western China. J Metamorph Geol, 21: 223–240
Hubbard J, Shaw J H. 2009. Uplift of the Longmen Shan and Tibetan Plateau, and the 2008 Wenchuan (M=7.9) earthquake. Nature, 458: 194–197
Jia D, Chen Z X, Jia C Z, Wei G Q, Li B L, Zhang Q, Wei D T, Shen Y. 2003. Structural features of the Longmen Shan foldand thrust belt and development of the Western Sichuan Foreland Basin, Central China (in Chinese with English abstract). Geol J Chin Univers, 9: 402–410
Jia D, Wei G Q, Chen Z X, Li B, Zeng Q, Yang G. 2006. Longmen Shan fold-thrust belt and its relation to the western Sichuan Basin in central China: New insights from hydrocarbon exploration. AAPG Bull, 90: 1425–1447
Kirby E, Reiners P W, Krol M A, Hodges K V, Farley K, Tang W Q, Chen Z L. 2002. Late Cenozoic evolution of the eastern margin of the Tibetan Plateau: Inferences from 40Ar/39Ar and (U-Th)/He thermochronology. Tectonics, 21: 1-1–1-20
Li J J, Shu Q, Zhou S Z, Zhao Z J, Zhang J M. 2004. Review and Prospects of Quaternary Glaciation Research in China (in Chinese with English abstract). J Glaciol Geocryol. 26: 235–243
Li Y T. 1989. Basic characteristics of the klippe structure in the Southwestern sector of the Longmen Mountains (in Chinese with English abstract). Region Geol Chin, 3: 247–249
Li Y, Allen P A, Densmore A L, Qiang X. 2003. Evolution of the Longmen Shan foreland basin (western Sichuan, China) during the Late Triassic Indosinian orogeny. Basin Res, 15: 117–138
Lu S, Yan D P, Wang Y, Gao J F, Qi L. 2010. Geochemical and geochronological constrains on the Mashan and Mupi plutons in the South Qinling orogenic belt: Implications for tectonic nature of the Bikou terrane (in Chinese with English abstract). Acta Petrol Sin, 26: 1889–1901
Luo Z L. 1991. The Dynamical model of the lithospheric Evolution in Longmenshan orogenic belt (in Chinese with English abstract). J Chendu Univ Technol (Sci Tech), 18: 1–7
Meng Q R, Hu J M, Wang E Q, Hu J M. 2006. Late Cenozoic denudation by large-magnitude landslides in the eastern edge of Tibetan Plateau. Earth Planet Sci Lett, 243: 252–267
Miao Y F, Meng Q Q, Fang X M, Yan X L, Wu F L, Song C H. 2011. Origin and development of Artemisia (Asteraceae) in Asia and its implications for the uplift history of the Tibetan Plateau: A review. Quat Int, 236: 3–12
Moore P D, Webb, J A, Collinson M E, 1991. Pollen Analysis. 2nd ed. London: Blackwell Science Press
Robert A, Pubellier M, Sigoyer J, Vergne J, Lahfid A, Cattin R, Findling N, Zhu J. 2010. Structural and thermal characters of the Longmen Shan (Sichuan, China). Tectonophysics, 491: 165–173
Sha Q A, Wu W S, Fu J M. 1990. Comprehensive Research of the Permian in Guizhou Guangxi Area Combine With Oil and Gas Exploration Discussion (in Chinese). Beijing: Science Press. 216
Shi S Q. 1994). Characteristics formation and evolution of the klippen in the region of Pengzhou, Sichuan (in Chinese with English abstract). J Chendu Univ Technol (Sci Techn), 21: 8–13
Sun X J, Song C Q, Wang F Y, Sun M R. 1997. Vegetation of history of the loess plateau of China during the last 100000 years based on pollen data. Quat Int, 37: 25–36
Wang E Q, Kirby E, Furlong K P, Soest M V, Xu G, Shi X, Kamp P J, Hodges K V. 2012. Two-phase growth of high topography in eastern Tibet during the Cenozoic. Nature Geosci, 5: 640–645
Wang W M. 1996. A playnological survey of Neogene strata in Xiaolongtan basin, Yunnan Province of South China (in Chinese with English abstract). Acta Bot Sin, 9: 743–748
Wang W M. 2004. On the origin and development of Artemisia (Asteraceae) in the geological past. Bot J Linn Soc, 145: 331–336
Worley B A, Wilson C J. 1996. Deformation partitioning and foliation reactivation during transpressional orogenesis, an example from the Central Longmen Shan, China. J Struct Geol, 18: 395–411
Wu S, Lin M B. 1991. An analysis on gravity gliding structure in Tangwangzhai area, Longmenshan, Sichuan (in Chinese with English abstract). J Chendu Univers Technol (Sci Tech), 18: 56–64
Wu S, Zhao B, Hu X W. 1999. A second discussion of klippen in Longmen Mountains, Sichuan (in Chinese with English abstract). J Chendu Univ Technol (Sci Tech), 26: 221–224
Wu Z H, Jiang W, Nelson D, Kidd B. 2002. Strata and spores association of Dogal coring redbeds if north Tibetan Plateau (in Chinese with English abstract). Geoscience, 16: 225–232
Wu Z Y. 1995. China’s Vegetation (in Chinese). Beijing: Science Press
Xu Z Q, Hou L W, Wang Z X. 1992. Orogenic Processes of the Songpan Ganzi Orogenic Belt of China (in Chinese with English abstract). Beijing: Geological Publishing House. 189
Yan D P, Zhou M F, Li S B, Wei G Q. 2011. Structural and geochronological constraints on the Mesozoic-Cenozoic tectonic evolution of the Longmen Shan thrust belt, eastern Tibetan Plateau. Tectonics, 30: 1–24
Yan D P, Zhou M F, Wei G Q, Liu H, Dong T Z, Zhang W C, Jin Z L. 2008. Collapse of Songpan-Garzê orogenic belt resulted from Mesozoic middle-crustal ductile channel flow: Evidences from deformation and metamorphism within Sinian-Paleozoic strata in hinterland of Longmenshan foreland thrust belt. Earth Sci Front, 15: 186–198
Yang Z R. 1998. Lower Permian and fossil zones in the Longmenshan, Sichuan with discussion on the division of the lower Permian in south China (in Chinese with English abstract). Prof Paper Strat Palaeont, 21: 106–127
Zeng Y F, Li Y. 1995. The formation and evolution of Longmenshan mountains foreland basin. J Mineral Petrol, 15: 40–49
Zhang Y Y, Zhan J Z. 1991. Late Cretaceous and Early Tertiary Spores and Pollen From the Western Tarim Basin, Southern Xinjiang, China. Beijing: Science Press. 398
Zhang Z L, Wang X F, Ding L. 2000. The time ownership of Kuche member in Tarim Basin and its ecologic characteristic (in Chinese with English abstract). Petrol Geol Oilfield Dev Daqing, 19: 15–17
Zheng Y, Kong P, Fu B H. 2014. Time constraints on the emplacement of klippen in the Longmen Shan thrust belt and tectonic implications. Tectonophysics, 634: 44–54
Zhou M F, Yan D P, Kennedy A K, Li Y Q, Ding J. 2002. SHRIMP U-Pb zircon geochronological and geochemical evidence for Neoproterozoic arc-magmatism along the western margin of the Yangtze Block, South China. Earth Planet Sci Lett, 196: 51–67
Zhou Z L, Ruan M D. 2006. New evidences on genesis of klippe in the Longmenshan Geopark (in Chinese with English abstract). Geol Rev, 52: 501–509
Zhou Z L. 2006. Advances on research into genesis of klippe in the Longmenshan Geopark (in Chinese with English abstract). Acta Geol Sichuan, 26: 7–9
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Xue, Z., Shang, Q., Jiang, W. et al. Emplacement age and tectonic implications of the brecciated limestone at the edge of the Longmenshan klippe. Sci. China Earth Sci. 59, 590–600 (2016). https://doi.org/10.1007/s11430-015-5209-0
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DOI: https://doi.org/10.1007/s11430-015-5209-0