基于QTQt和Pecube模型重建山西吕梁山中段晚中生代以来剥露历史  

Reconstruction of the exhumation history of the middle section of Lüliang Mountain of Shanxi Province since the Late Mesozoic based on the QTQt and Pecube model

作　　者：毕文军 原嘉予 杜一波 谢晋强 卫卓君 白阳 马坤元 BI Wenjun;YUAN Jiayu;DU Yibo;XIE Jinqiang;WEI Zhuojun;BAI Yang;MA Kunyuan(College of Geological and Surveying Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Shanxi In-stitute of Geological Survey Co.,Ltd.,Taiyuan 030006,Shanxi,China;Shanxi Institute of Energy,Yuci 030604,Shanxi,China)

机构地区：[1]太原理工大学地球科学与测绘工程学院,山西太原030024 [2]山西省地质调查院有限公司,山西太原030006 [3]山西能源学院,山西榆次030604

出　　处：《矿产勘查》2025年第1期195-204,共10页Mineral Exploration

基　　金：山西省基础研究计划(202103021223120,202103021223037);国家自然科学基金(42302241)联合资助。

摘　　要：吕梁山脉自晚中生代以来经历了复杂的冷却过程,了解其冷却过程有助于理解华北板块现今地貌格局的形成。本文通过收集吕梁山中段的低温热年代学数据,包括磷灰石裂变径迹和磷灰石(U-Th)/He数据,并利用二维(QTQt)和三维(Pecube)数值模拟对这些数据进行重新处理,明确该区域的隆升剥露过程。低温热年代数据结合新的热历史模拟结果,揭示吕梁山中段经历了晚白垩世、始新世和中新世以来的3期快速剥露。在晚白垩世时期,古太平洋板块向北的俯冲,导致华北地区处于弱挤压背景,靠近离石断裂带的西部地区快速剥露,而中部和东部缓慢剥露;在始新世时期,古太平洋板块俯冲缓慢,华北地区构造体制由弱挤压环境转变为伸展背景,发育大规模近南北向的正断层,导致紧邻清徐—交城断层的吕梁山东部发生快速剥露;在中新世以来,印度—欧亚板块的远程效应以及古太平洋板块回撤导致南北向正断层再次活化,致使吕梁山东部进一步剥露。The Lüliang Mountains underwent a complex cooling process since the Late Mesozoic,thus,its pro⁃cess plays an important role in understanding the formation of the current topography of the North China Plate.To clarify the uplift and exhumation process in this area,the Low-temperature thermochronology data(including apa⁃tite fission track and apatite(U-Th)/He data)collected from the middle section of the Lüliang Mountainswere repro⁃cessed by two-dimensional(QTQt)and three-dimensional(Pecube)numerical simulations.The Low-temperature thermal dating data combining with the new thermal modeling results reveal that the rapid exhumation in the middle section of Lüliang Mountains experienced three periods:the Late Cretaceous,Eocene and Post-Miocene.During the late Cretaceous,the northward subduction of the Pacific Platenot only resulted in the tectonic background becoming a weak compression environment of the northern China,but also the rapid exhumation of eastern regions closing to the Lishi fault zone and the slow exhumation of central and eastern regions.During the Eocene,the slow subduction of the Pacific Plate led to the tectonic background changes from a weak compression toextensional environment,the onset activity of the North–south trending rifts and rapid exhumation in the eastern part of Lüliang Mountains clos⁃ing to Qingxu-Jiaocheng fault zone.Since the Miocene,the remote effectcaused by collision between the Indian and the Eurasian plates and the retreat of the Pacific Plate led to the reactivation of the North–south trending rifts and the further exhumation of the eastern part of the Lüliang Mountains.

关 键 词：吕梁山中段 晚中生代以来 剥露历史 QTQt数值模拟 Pecube模拟 

分 类 号：P56[天文地球—构造地质学] P548[天文地球—地质学]