Geophysics for urban mining and the first surveys in Denmark: rationale, field activity and preliminary results

IF 2 4区 地球科学 Q1 GEOLOGY
A. Sandrin, Aleksandar Maricak, B. Heincke, Rune J. Clausen, L. Nielsen, J. Keiding
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引用次数: 1

Abstract

Geophysical methods have been widely used in recent decades to investigate and monitor landfill sites for environmental purposes. With the advent of the circular economy, waste contained in old landfills may be considered a resource that can be developed. Since the content of old landfills is largely unknown, the occurrence and quantity of valuable materials must be investigated before embarking on any development activity. Two landfills on Sjælland, Denmark (located at Hvalsø and Avedøre) were selected for a pilot study to characterise their content. At both locations, a set of geophysical surveys is underway. Here, we present the data obtained from magnetic and 2D seismic refraction surveys. Magnetic data show various anomalies that can be interpreted as caused by iron-rich waste. At both sites, the landfill material results in generally low P-wave velocity (<400 m/s), lower than those obtained for Quaternary sediments at Avedøre. The seismic velocities appear to increase in the presence of metals or by compaction with depth (>550 m/s). We propose that seismic refraction can thus define the bottom of the landfill and possibly its internal structure, especially when combined with other methods.
丹麦城市采矿的地球物理学和首次调查:原理、实地活动和初步结果
近几十年来,地球物理方法已被广泛用于调查和监测垃圾填埋场的环境目的。随着循环经济的出现,旧垃圾填埋场中的废物可能被认为是一种可以开发的资源。由于旧垃圾填埋场的内容在很大程度上是未知的,因此在开始任何开发活动之前,必须调查有价值材料的出现情况和数量。选择丹麦Sjælland的两个垃圾填埋场(位于Hvalsø和Avedøre)进行试点研究,以确定其含量。在这两个地点,正在进行一系列地球物理调查。在这里,我们介绍了从磁性和二维地震折射测量中获得的数据。磁性数据显示了各种异常现象,这些异常现象可以被解释为是由富含铁的废物引起的。在这两个地点,填埋材料通常导致较低的P波速度(550m/s)。因此,我们提出,地震折射可以定义垃圾填埋场的底部及其内部结构,尤其是与其他方法相结合时。
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来源期刊
Geus Bulletin
Geus Bulletin GEOLOGY-
CiteScore
2.80
自引率
17.60%
发文量
8
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