Maqola

Mesozoic–Cenozoic source provenance and thermal evolution of the southwestern Tien Shan, SE Uzbekistan

Kaixun Zhang1Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaZhiyuan He2Laboratory for Mineralogy and Petrology, Department of Geology, Ghent University, Krijgslaan 281 S8, 9000 Ghent, BelgiumYong Liang2Laboratory for Mineralogy and Petrology, Department of Geology, Ghent University, Krijgslaan 281 S8, 9000 Ghent, BelgiumShida Song2Laboratory for Mineralogy and Petrology, Department of Geology, Ghent University, Krijgslaan 281 S8, 9000 Ghent, BelgiumJohan De Grave2Laboratory for Mineralogy and Petrology, Department of Geology, Ghent University, Krijgslaan 281 S8, 9000 Ghent, BelgiumWenbin Zhu3State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, 210023 Nanjing, ChinaHaifei TongBakhiter Nurtaev5Institute of Geology and Geophysics, State Committee on Geology and Mineral Resources of Uzbekistan, Tashkent 100041, UzbekistanLinglin Zhong6College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, Sichuan, ChinaChunlin Li1Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaChang Jian7State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

2025en

Ochiq kirish: yoʻq

ABI

Annotatsiya

Abstract The evolution of intracontinental mountain ranges poses significant challenges in understanding Earth’s geological history. Among these mountain ranges, the Tien Shan in the Central Asia stands as one of the most important examples. Its crustal structure was shaped during the Paleozoic closure of the Paleo-Asian Ocean and has since undergone multiple reactivations driven by distant tectonic processes along the Eurasian plate margin, culminating in its modern morphology. While geochronological and thermochronological studies in the Tien Shan have largely focused on the range’s core, revealing a complex Mesozoic tectonic history with a dominant Cenozoic overprint from the India-Eurasia collision, the westernmost regions remain comparatively understudied. The aim of this study was to further provide constraints on Meso-Cenozoic source-to-sink dynamics and associated basin-mountain interactions, and Cenozoic reactivation and intracontinental deformation of the westernmost Tien Shan. Here we present new detrital zircon U-Pb data for the Early Jurassic to Neogene, and apatite fission track and (U-Th)/He data for the Early Jurassic and Cretaceous sedimentary rocks in the southern Gissar range (western Tajik basin), westernmost Tien Shan. Detrital zircons from the Jurassic to Neogene sandstone samples display various Precambrian single-grain ages and distinct Paleozoic age peaks (425–270 Ma), indicative of origins from the North and Middle Tien Shan. In contrast to the central-eastern Tajik basin, source-to-sink analyses reveal that the Pamir plateau has not been a main source area for the western Tajik basin. Apatite fission track and (U-Th)/He data, and associated thermal history modeling results, suggest that the Cenozoic inversion of the Tajik basin’s margin in response to the India-Asia convergence occurred as early as the early Oligocene, followed by another distinct exhumation phase since the mid-Miocene.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.1130/b38250.1

Iqtiboslar va manbalar

0 ta iqtibos145 ta foydalanilgan manba