Integrating geochronologic and instrumental approaches across the Bengal Basin
Integrating geochronologic and instrumental approaches across the Bengal Basin
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DOI：
10.1002/esp.4687
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发表时间：
2019-11
影响因子：
3.3
通讯作者：
E. Chamberlain;S. Goodbred;R. Hale;M. Steckler;J. Wallinga;Carol A. Wilson
中科院分区：
文献类型：
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作者：
E. Chamberlain;S. Goodbred;R. Hale;M. Steckler;J. Wallinga;Carol A. Wilson
限制时间对于评估沉积盆地中驱动景观变化的过程的速率和相对贡献至关重要。野外环境的地貌特征指导着应用地质年代学或仪器工具来解决这个问题，因为地貌属性可以很大程度上影响方法的可行性。例如，沉积物产量和有机保存的相关潜力可能决定着放射性碳测年的有用性。同样，沉积物从源到汇的运移速度可能决定到达三角洲的矿物颗粒的成熟度和/或光暴露，从而决定发光测年的可行性。在这里，我们探索了在孟加拉盆地应用的测年和仪器方法的可行性和奇特之处，并回顾了它们产生的记录。这个巨大的、动态的、空间可变的系统拥有世界上人口最多的三角洲。因此，勾勒出一个成功的年代学应用框架对于管理人类的水和沉积物资源是有价值的，无论是在这里还是在世界其他人口稠密的三角洲。我们的综述包括放射性碳测年、发光测年、考古记录和历史地图、短寿命放射性同位素、地平线标记和棒材表面高程表、大地测量和地表仪器。综合起来，这些工具可以用来重建孟加拉盆地从晚更新世到现在的历史。孟加拉盆地地质年代学和仪器的种类和范围不断扩大，为研究综合空间和时间尺度上的盆地过程打开了大门。©2019作者。地球表面过程和地貌由John Wiley&Sons Ltd.出版。
Constraining time is of critical importance to evaluating the rates and relative contributions of processes driving landscape change in sedimentary basins. The geomorphic character of the field setting guides the application of geochronologic or instrumental tools to this problem, because the viability of methods can be highly influenced by geomorphic attributes. For example, sediment yield and the linked potential for organic preservation may govern the usefulness of radiocarbon dating. Similarly, the rate of sediment transport from source to sink may determine the maturity and/or light exposure of mineral grains arriving in the delta and thus the feasibility of luminescence dating. Here, we explore the viability and quirks of dating and instrumental methods that have been applied in the Bengal Basin, and review the records that they have yielded. This immense, dynamic, and spatially variable system hosts the world's most inhabited delta. Outlining a framework for successful chronologic applications is thus of value to managing water and sediment resources for humans, here and in other populated deltas worldwide. Our review covers radiocarbon dating, luminescence dating, archaeological records and historical maps, short‐lived radioisotopes, horizon markers and rod surface elevation tables, geodetic observations, and surface instrumentation. Combined, these tools can be used to reconstruct the history of the Bengal Basin from Late Pleistocene to present day. The growing variety and scope of Bengal Basin geochronology and instrumentation opens doors for research integrating basin processes across spatial and temporal scales. © 2019 The Authors. Earth Surface Processes and Landforms Published by John Wiley & Sons Ltd.