Abstract: The Makran reprents a huge accretionary wedge in SE Iran that resulted from the long-lasting subduction of the Neotethys Ocean since the Mesozoic. From west to east, this accretionary wedge extends ~1000 km between the Minab Fault in Iran, and the Ornach-Nal Fault in Pakistan. The ongoing oceanic subduction characterizes this belt between the Iranian Plateau and the Tibetan Plateau, both of which were generated by collision of Eurasian with the Arabian and Indian plates, and provides an ideal target to recover the tectonic history of subduction.The western Makran located in Iran can be subdivided into four units:The North Makran ophiolitic mélange, the Inner Makran, the Outer Makran, and the Coastal Makran.Bad on our detailed structural analysis and geochronological dating, we obtain veral new results that can help us to better understand the structural evolution: (1) The North Makran ophiolitic mélange includes thick piles of volcanic rocks and limestone that directly cover the mantle peridotite, so it is likely to be part of an Early Cretaceous volcanic arc by our zircon dating at ~115 Ma on mafic intrusions; (2) The entire western Makran underwent three phas of deformation. D1 is characterized by top-to-the S/SW thrusting as evidence by southward emplacement of the ophiolitic mélange onto the Eocene dimentary rocks. D2 deformation strongly folded the pre-late Miocene/early Pliocene strata that also corresponds to the final emplacement of the ophiolite to the surface.D3 structures extends in a N-S direction with top-to-the W kinematics that overthrust the Miocene sandstone onto the Pliocene fluvial diments along the Minab Fault; (3) Combined with geol
ogical and geochronological relationship, D1 occurred at ~45-35 Ma, D2 initiated in middle Miocene and ended with a regional late Miocene-early Pliocene uncomformity, and D3 structures are still active as the subduction continues.
蹂躏拼音Key words: Makran, structural analysis, polypha deformation, Cenozoic
Acknowledgements: This work is granted by the National Natural Science Foundation of China (91855103, 91855207 and 91855212),the Ministry of Science and Technology (2016YFC0600401and2016YFC0600102),the State Key Laboratory of Lithospheric Evolution (SKL-Q201801). References
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lol召唤师技能About the first author
CHU Yang,male,born in 1984 in Anhui Province; PhD; rearch associate professor of Institute of Geology and Geophysics,Chine Academy of Sciences.He is now interested in the study on structural analysis and tectonothermal evolution of orogenic belts. Email: chuyang@ mail.iggcas.ac;phone*************.
Structural Evolution of the Western Makran广西民族博物馆
租房合同免费下载CHU Yang1, *, CHEN Lin1, WAN Bo1, LIN Wei1 and Morteza TALEBIAN2
1 Institute of Geology and Geophysics, Chine Academy of Sciences, Beijing, 100029, China
2 Institute for Earth Sciences, Geological Survey of Iran, Azadi Square, Meraj Blvd, Tehran, Iran
Citation: Chu et al., 2020. Structural Evolution of the Western Makran. Acta Geologica Sinica (English Edition), 94(supp. 1): 8. DOI:
10.1111/1755-6724.14430
*Correspondingauthor.E-mail:*******************.ac
Acta Geologica Sinica (English Edition), 2020, 94(supp.1): 8
© 2020 Geological Society of China
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