Estimation of the durations of breaks in deposition – Speleothem case study

IF 1.2 4区地球科学 Q3 Earth and Planetary Sciences

Geochronometria Pub Date : 2020-01-01 DOI:10.2478/geochr-2020-0022

J. Pawlak, H. Hercman, P. Sierpień, P. Pruner, M. Gąsiorowski, A. Mihevc, N. Zupan Hajna, P. Bosák, M. Błaszczyk, B. Wach

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引用次数: 2

Abstract

Abstract Speleothems provide one of the most continuous terrestrial archives. However, due to changing conditions in temperature/humidity or the chemistry of percolating water, sedimentation breaks (hiatuses) and erosional events are possible and are commonly recorded in speleothems. Sedimentation breaks with durations longer than the resolution of the studied record should be considered in potential speleothem age-depth models. The most classic and reliable solution to the problem is the independent construction of age-depth models for the parts of speleothems separated by the hiatuses. However, in some cases, it is not possible to obtain a sufficient number of dating results for reliable age-depth model estimation. In such cases, the problem can be solved by the application of other sources of chronological information. Here, based on a few speleothem examples, an alternative approach – oxygen isotopic stratigraphy – is used to estimate the chronology for the parts of speleothems where there is not enough chronological information for classic age-depth models. As a result, the deposition break duration can be estimated.

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沉积中断持续时间的估计——Speleothem案例研究

摘要Speleothem提供了最连续的陆地档案之一。然而，由于温度/湿度或渗透水化学性质的变化，沉积中断（间断）和侵蚀事件是可能的，并且通常记录在洞穴中。在潜在洞穴年龄深度模型中，应考虑持续时间超过研究记录分辨率的沉积断裂。该问题最经典、最可靠的解决方案是独立构建由裂缝分隔的洞穴部分的年龄深度模型。然而，在某些情况下，不可能获得足够数量的测年结果来进行可靠的年龄深度模型估计。在这种情况下，可以通过应用其他按时间顺序排列的信息来源来解决这个问题。在这里，基于一些洞穴的例子，使用了一种替代方法——氧同位素地层学——来估计洞穴中没有足够的年代信息用于经典年龄深度模型的部分的年代。结果，可以估计沉积中断持续时间。

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来源期刊

Geochronometria 地学-地球科学综合

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Geochronometria is aimed at integrating scientists developing different methods of absolute chronology and using them in different fields of earth and other natural sciences and archaeology. The methods in use are e.g. radiocarbon, stable isotopes, isotopes of natural decay series, optically stimulated luminescence, thermoluminescence, EPR/ESR, dendrochronology, varve chronology. The journal publishes papers that are devoted to developing the dating methods as well as studies concentrating on their applications in geology, palaeoclimatology, palaeobiology, palaeohydrology, geocgraphy and archaeology etc.