| 盆山沉积耦合原理在定量恢复造山带隆升剥蚀过程中的应用 |
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| 引用本文： | 符超峰,方小敏,宋友桂,强小科,常宏.盆山沉积耦合原理在定量恢复造山带隆升剥蚀过程中的应用[J].海洋地质与第四纪地质,2005,25(1):105-112. |
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| 作者姓名： | 符超峰 方小敏 宋友桂 强小科 常宏 |
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| 作者单位： | 1. 中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,西安,710075;中国科学院,研究生院,北京,100039
2. 中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,西安,710075 |
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| 基金项目： | 国家自然科学基金项目(40202019，90102017)，中科院知识创新重要方向性项目(KZCX SW 118) |
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| 摘 要： | 造山带的隆升剥蚀过程研究一直是地学界研究的热点和难点，而与造山带毗邻的沉积盆地则真实地记录了造山带隆升剥蚀演化历史。因此，通过对沉积盆地中沉积物的研究可以反演山地隆升剥蚀历史。基于这种思路，介绍了两种定量恢复造山带隆升剥蚀的方法，即裂变径迹热年代学方法和质量平衡法。前者利用样品碎屑单颗粒的裂变径迹年龄的统计分析确定其源区，并量化源区的抬升剥露及热演化历史，但要求对样品的沉积时代有很好的年代学控制，沉积后样品没有遭受热重置。后者则假定在一定时间间隔内，盆山耦合系统中物源区的地形变化总和与沉积区的碎屑沉积质量总和成正比，即隆升过程中产生侵蚀总量与毗邻盆地的沉积总量之间质量守恒，从而通过研究盆地中相应时间段的沉积总量、沉积速度来定量恢复古地形，反演造山带的演化，但盆山系统的界定以及地层定年的精度直接影响到恢复造山带隆升剥蚀过程的可靠性。
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| 关 键 词： | 造山带 隆升 剥蚀 沉积盆地 裂变径迹 源区 年代学 过程 历史 质量守恒 |
| 文章编号： | 0256-1492(2005)01-0105-08 |
| 修稿时间： | 2004年6月22日 |
TWO QUANTITATIVE METHODS OF STUDYING OROGENIC BELT UPLIFT AND DENUDATION THROUGH BASIN-RANGE SEDIMENTARY COUPLING |
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| FU Chao-feng.TWO QUANTITATIVE METHODS OF STUDYING OROGENIC BELT UPLIFT AND DENUDATION THROUGH BASIN-RANGE SEDIMENTARY COUPLING[J].Marine Geology & Quaternary Geology,2005,25(1):105-112. |
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| Authors: | FU Chao-feng |
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| Institution: | FU Chao-feng~ |
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| Abstract: | Intensive uplifting of mountains have great impact on climate and environment,so the uplift and denudation processes of orogenic belts have been a major focus problem in geosciences circles. Sedimentary basins adjacent to mountains have truely recorded plentiful information about the uplift and denudation processes of orogenic belts. Therefore, the history of uplift and denudation processes of orogenic belts can be reconstructed using basin-range sedimentary coupling theory. In this context, two quantitative methods were introduced to reconstruct the uplift and denudation processes of orogenic belts. The former is a thermochronology method to identify provenances of sediments in a basin and reconstruct the evolution of uplift, denudation and thermal history of the adjacent related orogenic belts through detrital zircon and apatite fission-track dating. The premise conditions are well-controlled stratigraphy ages and sediments without suffering thermal modification since they deposited. The latter is a mass-balance method, supposing that erosion and denudation accumulation mass of provenance paleotopography in orogenic belts is in direct proportion to the detrital sediment mass of the related basin under a certain period in a closed basin-range sedimentary coupling system. Studies on total mass of sediments, and deposition rate of sedimentary basin are effective methods to quantitatively recover the paleotopography and furthermore to reconstruct the evolution of orogenic belts. However, the area boundaries of basin-range system and the precision of stratigraphy chronology have a great effect on this recovery and reconstruction. |
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| Keywords: | orogenic belt uplift basin-range coupling fission-track mass balance |
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