Cenozoic tectono‐geomorphologic evolution of the Pamir‐Tian Shan convergence zone: evidence from detrital zircon U‐Pb provenance analyses

Tectonics ◽  
2021 ◽  
Author(s):  
Yingying Jia ◽  
Christoph Glotzbach ◽  
Lixing Lü ◽  
Todd A. Ehlers
Keyword(s):  
Detrital Zircon ◽  
Convergence Zone ◽  
Geomorphologic Evolution ◽  
Tian Shan

Cenozoic tectonic evolution of the Pamir-Tian Shan convergence zone: evidence from detrital zircon U-Pb provenance analysis

2020 ◽  
Author(s):  
Yingying Jia ◽  
Christoph Glotzbach ◽  
Todd Ehlers ◽  
Lixing Lü
Keyword(s):  
Tarim Basin ◽  
Detrital Zircon ◽  
Tectonic Evolution ◽  
Middle Miocene ◽  
Source Area ◽  
Convergence Zone ◽  
Late Cenozoic ◽  
Crustal Shortening ◽  
Early Cenozoic ◽  
Tian Shan

<p><span>The Pamir is an along-strike continuation of the Tibet-Himalaya orogen and penetrated ~300 km into the Tarim and Tajik basins in Cenozoic times. This northward indentation led to regional paleoenvironmental changes and facilitated northward transport of the far-field stress from the India-Asia plate boundary. Due to the compressional stress from the India-Asia boundary and Cenozoic lithosphere delamination, the Pamir underwent intense exhumations, which well recorded its Late Cenozoic mountain building processes. However, the very rapid Late Cenozoic exhumation also erased earlier cooling records and hinders a clear understanding of the Early Cenozoic tectonic evolution of Pamir. Thus, the onset and magnitude of the northward movement of Pamir are loosely constrained (Eocene-Late Oligocene) and long debated. In particular, the Early Cenozoic tectonic evolution of Pamir is unclear.</span></p><p><span>Provenance study of sediments in the adjacent sediment basins is a widely used method to reconstruct the tectonic-geomorphologic evolution of a mountain range. We carried out paleocurrent measurements and detrital zircon analysis of the Cretaceous-Pliocene sediments in the northern Pamir-Tian Shan convergence zone. Our study area, the Tierekesazi section, is located immediately south to the southern Tian Shan and is evolved in the present foreland basin of the southwestern Tian Shan. The provenance data show that the Tian Shan was the primary source area of the northwestern Tarim basin in the Cretaceous. The appearance of the Triassic-Jurassic detrital zircon grains and northward paleo-flow directions in the Eocene (~41 Ma) to Middle Miocene sediments suggest the Pamir became an important source area of the northwestern Tarim basin. Combining with the regional crustal shortening and paleoclimate data, we speculate that the northward indentation of the Pamir initiated before ~41 Ma. In contrast with the northward movement and Middle-Late Miocene accelerated exhumation of the Pamir, the source area of the studied section shifted back to the Tian Shan after the Middle Miocene. It consists with the Middle-Late Miocene uplift of the southwestern Tian Shan. Simultaneously, the crustal shortening of Pamir propagated to its northern foreland. Newly formed fold-and-thrust zones probably blocked the sediment transport from Pamir to the Tierekesazi section, and the present-day east flowing drainage system in the Pamir-Tian Shan convergence zone was established. We infer, in this period, the Pamir likely reached its present position, which is consistent with the appearance of an extreme arid climate in the Tarim basin.</span></p>

scholarly journals Cenozoic tectono-geomorphological growth of the SW Chinese Tian Shan: Insight from AFT and detrital zircon U–Pb data

2015 ◽  
Vol 111 ◽  
pp. 395-413 ◽  
Author(s):  
Yingying Jia ◽  
Bihong Fu ◽  
Marc Jolivet ◽  
Shuo Zheng
Keyword(s):  
Detrital Zircon ◽  
Tian Shan

scholarly journals Quaternary tectonic evolution of the Pamir-Tian Shan convergence zone, Northwest China

Tectonics ◽  
2017 ◽  
Vol 36 (12) ◽  
pp. 2748-2776 ◽  
Author(s):  
Jessica Ann Thompson Jobe ◽  
Tao Li ◽  
Jie Chen ◽  
Douglas W. Burbank ◽  
Aaron Bufe
Keyword(s):  
Tectonic Evolution ◽  
Northwest China ◽  
Convergence Zone ◽  
Tian Shan

Revisiting the tectonic evolution of the Triassic Palaeo-Tethys convergence zone in northern Thailand inferred from detrital zircon U–Pb ages

2020 ◽  
pp. 1-25
Author(s):  
Hidetoshi Hara ◽  
Tetsuya Tokiwa ◽  
Toshiyuki Kurihara ◽  
Thasinee Charoentitirat ◽  
Apsorn Sardsud
Keyword(s):  
Continental Margin ◽  
South China ◽  
Detrital Zircon ◽  
Active Continental Margin ◽  
Sedimentary Rocks ◽  
Convergence Zone ◽  
Accretionary Complex ◽  
Northern Thailand ◽  
Collision Zone ◽  
Back Arc

Abstract Detrital zircon U–Pb ages for sediments in and around the Palaeo-Tethyan convergence zone in northern Thailand provide constraints for tectonic interpretations of the Indochina Block, the Sibumasu Block, the Inthanon Zone accretionary complex and the Nan Back-arc Basin during the Triassic. In sedimentary rocks of the Indochina Block, almost all of the Palaeozoic and Triassic zircons were sourced from the collision zone between the Indochina and South China blocks, and an active continental margin in the western Indochina Block. Sediments of the Sibumasu Block were supplied by erosion of Archaean basement and from the Grenville and the Pan African orogenies, but show no record of Permian to Triassic igneous activity. Accretionary complex sediments have provenances of both the Sukhothai Arc and the Indochina and South China blocks, with detrital zircons of various ages being supplied from crustal uplift and erosion related to the Indosinian I orogeny. Sedimentary rocks of the Nan Back-arc Basin are widely distributed not only in the Nan–Uttaradit but also in northern Sukhothai areas. The origin of the Pha Som Metamorphic Complex and associated formations can be traced to basin-filling sediments in the Nan Back-arc Basin. These detrital zircon U–Pb ages have also allowed identification of the changing tectonic setting in the Palaeo-Tethys convergence zone from the ‘erosion of Proterozoic continental basement’ to ‘Palaeozoic active continental margin in the western Indochina Block’ and ‘Palaeozoic, Permian to Triassic collision zone between the South China and Indochina blocks’ through to ‘Triassic active Sukhothai Arc’.

scholarly journals Dating growth strata and basin fill by combining 26Al/10Be burial dating and magnetostratigraphy: Constraining active deformation in the Pamir–Tian Shan convergence zone, NW China

Lithosphere ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 806-828 ◽  
Author(s):  
Jessica Ann Thompson Jobe ◽  
Tao Li ◽  
Bodo Bookhagen ◽  
Jie Chen ◽  
Douglas Burbank
Keyword(s):  
Convergence Zone ◽  
Active Deformation ◽  
Growth Strata ◽  
Nw China ◽  
Tian Shan ◽  
Basin Fill

Slip partitioning in the northeast Pamir–Tian Shan convergence zone

2010 ◽  
Vol 483 (3-4) ◽  
pp. 344-364 ◽  
Author(s):  
Bihong Fu ◽  
Yoshiki Ninomiya ◽  
Jianming Guo
Keyword(s):  
Convergence Zone ◽  
Slip Partitioning ◽  
Tian Shan
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