地质通报2024，Vol.43Issue(12)：2151-2161,11.DOI:10.12097/gbc.2024.10.002
中亚哈萨克斯坦山弯构造形成时限与动力学机制
Timing and origin of the Kazakhstan Orocline in Central Asia:A preliminary synthesis
摘要
Abstract
The orocline,as an orogenic-scale structure,records key information of the orogenic evolution in 4D,and has a fundamental impact on the magmatic,structural,sedimentary evolution of orogenic belts.However,the geodynamic origin of oroclinal bending remains controversial.This paper focuses on the Kazakhstan Orocline in the western Central Asian Orogenic Belt,which is an ideal candidate for studying the mechanism of oroclinal bending in accretionary orogens given its continuous record of plate subduction.The paper reviews available geological and paleomagnetic data around the Kazakhstan Orocline,which allows to conclude that major phase of bending during the Late Devonian to Early Carboniferous was likely driven by along-strike variation in trench migration,similarly as the formation of arcuate subduction systems around the Pacific margin.A later stage of bending during the Late Carboniferous to Permian might be associated with the amalgamation of the Siberian,Tarim and Baltic cratons.To further understand the origin of the Kazakhstan Orocline would benefit from structural constraints around the hinge of the Kazakhstan Orocline,as well as 4D reconstruction of the Junggar subduction system along two limbs of the orocline(West Tianshan and West Junggar in NW China)and around the hinge of the orocline(Balkhash area in Kazakhstan).关键词
中亚造山带/哈萨克斯坦山弯构造/板片后撤/地球动力学/俯冲带Key words
Central Asian Orogenic Belt/Kazakhstan Orocline/slab rollback/geodynamics/subduction zone分类
天文与地球科学引用本文复制引用
李鹏飞..中亚哈萨克斯坦山弯构造形成时限与动力学机制[J].地质通报,2024,43(12):2151-2161,11.基金项目
国家自然科学基金项目(批准号:42172237)和广东省项目(编号:2019QN01H101) （批准号:42172237）
