| 川东北地区埋藏–剥露历史分析——来自盆地模拟和热年代的制约 |
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| 引用本文： | 胡迪,沈传波,刘泽阳.川东北地区埋藏–剥露历史分析——来自盆地模拟和热年代的制约[J].大地构造与成矿学,2016(6):1145-1153. |
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| 作者姓名： | 胡迪 沈传波 刘泽阳 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京100029;中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉430074;2. 中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉,430074 |
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| 基金项目： | 国家自然科学青年基金项目(40902038)，中国石油科技创新基金项目(2016D-5007-0103)，武汉市青年科技晨光计划项目(2016070204010145)，中央高校基本业务费专项资金资助项目(CUG201536) |
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| 摘 要： | 构造热演化是沉积盆地基础地质研究的重要内容,更是油气勘探中不可或缺的部分,多种古地温方法的综合对比研究是目前热史研究主要发展趋势。本文将裂变径迹(FT)和(U-Th)/He热年代学、镜质体反射率法(Ro)和盆地模拟等技术相结合,运用正演和反演的方法重建了川东北地区埋藏–剥露热演化历史。研究表明川东北地区自晚白垩世埋深达到最大后进入剥蚀阶段,大约从92 Ma开始隆升,经历了快速隆升–缓慢隆升–加速隆升三个阶段,整个过程的剥蚀量大约3~4 km,且两次大的剥露过程分别受控于雪峰山的隆起造山以及大巴山的推覆和青藏高原的隆升作用。研究还建立了综合热年代学、Ro和盆地模拟技术恢复复杂构造–热演化历史的方法,这对于复杂环境下的构造热演化历史的恢复以及海相油气勘探具有重要的意义。
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| 关 键 词： | 热年代学 盆地模拟 构造热演化 埋藏 剥露 川东北 |
Basin Modeling and Thermochronological Constrains on the Burial and Denudational History of the Northeast Sichuan Basin |
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| Abstract: | Tectonothermal evolution is an important content of basic geological study in sedimentary basin,and is also an indispensable part of petroleum exploration.A comprehensive comparative study of various palaeogeothermal methods is the main development trend of thermal history research.The burial and denudational history of the Northeast Sichuan Basin was reconstructed through fission-track (FT) and (U-Th)/He thermochronology combined with vitrinite reflectance (Ro) and basin modeling.The exhumation processes were reconstructed by forward and inversion modeling methods.The results show that this area entered the erosion stage since the Late Cretaceous after reaching the maximum burial depth.It started uplifting since 92 Ma and experienced three stages of uplift,including rapid uplift-slow upliftaccelerated uplift.The whole denudation thickness is approximately 3-4 km.The two significant denudations were controlled by orogenic uplift of the Xuefeng Mountain together with thrust napping of the Daba Mountain and the eastward growth of the Tibetan Plateau uplift.This study also established an approach to synthesize thermochronology,Ro and basin modeling to restore the complex tectonic-thermal evolution history,which is likely of applicable in the study of evolution history of complex basins and marine petroleum exploration. |
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| Keywords: | thermochronology basin modeling tectonothermal evolution burial and denudation Northeast Sichuan Basin |
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