Eocene seawater retreat from the southwest Tarim Basin and implications for early Cenozoic tectonic evolution in the Pamir Plateau

2013 ◽  
Vol 588 ◽  
pp. 27-38 ◽  
Author(s):  
Jimin Sun ◽  
Maosheng Jiang
Keyword(s):  
Tarim Basin ◽  
Tectonic Evolution ◽  
Early Cenozoic ◽  
Southwest Tarim Basin

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>

Dissimilar age and provenance of the Nindam and Jurutze volcaniclastic formations, Zanskar Gorge, Ladakh (India)

2021 ◽  
Author(s):  
Goran Andjic ◽  
Renjie Zhou ◽  
Tara N. Jonell ◽  
Jonathan C. Aitchison
Keyword(s):  
Detrital Zircon ◽  
Tectonic Evolution ◽  
Alternative Model ◽  
Early Eocene ◽  
Convergent Margins ◽  
Geochemical Composition ◽  
Age Gap ◽  
Volcaniclastic Rocks ◽  
Forearc Basins ◽  
Early Cenozoic

<p>Pre-early Eocene volcaniclastic rocks exposed in the Indus Suture Zone (Ladakh, India) are key to deciphering the complex magmatic and tectonic evolution of the convergent margins that existed between India and Eurasia. Several hypotheses exist regarding the provenance of the middle Cretaceous to early Cenozoic Jurutze and Nindam formations yet there is presently no consensus. Leading models propose that: (a) they were either formed in neighbouring sub-basins at one convergent margin consisting of the Kohistan-Ladakh-Dras arc; or (b) they became stratigraphically superposed after the collision between the Kohistan-Ladakh and Dras arcs. Here we present new U-Pb detrital zircon, major and trace element geochemical, and petrographic datasets from the Nindam and Jurutze formations that support a disparate provenance and thus necessitate an alternative model. The Jurutze Fm. has a geochemical composition typical of arcs built on continental crust, whereas the Nindam Fm. presents a geochemical signature compatible with that of an intraoceanic arc. The significant age gap between these formations (>20 m.y.) in the Zanskar Gorge further precludes the possibility that the Jurutze Fm. was deposited on top of the Nindam Fm. We propose that the Nindam and Jurutze formations were deposited in distinct forearc basins and explore scenarios for their formation at separate convergent margins, i.e. the separate Kohistan-Ladakh and Dras arcs, respectively.</p>

scholarly journals Processes and causes of Phanerozoic tectonic evolution of the western Tarim Basin, northwest China

2020 ◽  
Vol 17 (2) ◽  
pp. 279-291
Author(s):  
Teng-Fei Wang ◽  
Zhen-Kui Jin ◽  
He Li ◽  
Dong-Qing Liu ◽  
Ri-Hui Cheng ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Tectonic Evolution ◽  
Northwest China

Mixed carbonate-clastic facies in the Eocene Kalatar Formation of the southwest Tarim Basin (NW China): tectonic and climatic controls

Facies ◽  
2013 ◽  
Vol 60 (1) ◽  
pp. 111-131 ◽  
Author(s):  
Hong-Qiang Yang ◽  
Jian-Wei Shen ◽  
Hai-Jun Yang ◽  
Li-Juan Zhang ◽  
Meng Li ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Nw China ◽  
Southwest Tarim Basin ◽  
Mixed Carbonate

scholarly journals Discovery of Precambrian thick black mudstones and its implication for hydrocarbon exploration in the southwest Tarim Basin

2018 ◽  
Vol 3 (2) ◽  
pp. 124-131
Author(s):  
Guangyou Zhu ◽  
Dedao Du ◽  
Weiyan Chen ◽  
Qisen Sun ◽  
Tingting Li ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Hydrocarbon Exploration ◽  
Southwest Tarim Basin

Early Paleozoic Tarim Orocline: Insights from paleogeography and tectonic evolution in the Tarim Basin

2017 ◽  
Vol 52 ◽  
pp. 436-448 ◽  
Author(s):  
Qian Wang ◽  
Sanzhong Li ◽  
Shujuan Zhao ◽  
Dunling Mu ◽  
Runhua Guo ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Tectonic Evolution ◽  
Early Paleozoic

Late Cretaceous-early Cenozoic tectonic evolution of the southern California margin inferred from provenance of trench and forearc sediments

2010 ◽  
Vol 123 (3-4) ◽  
pp. 485-506 ◽  
Author(s):  
C. E. Jacobson ◽  
M. Grove ◽  
J. N. Pedrick ◽  
A. P. Barth ◽  
K. M. Marsaglia ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Tectonic Evolution ◽  
Southern California ◽  
Early Cenozoic
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