Magnetic Susceptibility Prospecting and Geochemical Characterization of Taxco’s Mining Waste Dam Guerrero I (Mexico)

IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Quaternary Pub Date : 2023-07-05 DOI:10.3390/quat6030040
J. Morales, María del Sol Hernández Bernal, Nayeli Pérez Rodríguez, A. Goguitchaichvili
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Abstract

Mining activity at Taxco produces seven mining waste deposits, which are problematic for the health of the community and for the environment in general. This study targets the Guerrero I mining waste dam (the youngest of the region), located south of Taxco de Alarcon, in the northern portion of Guerrero State, Mexico. This study reports the vertical magnetic susceptibility prospecting results and geochemical characterization of 27 tailing samples from the Guerrero I dam. Results from magnetic techniques provide evidence for different deposit layers of variable mineral composition, in agreement with the lithological column. The short evolution period of this relatively young dam is corroborated by the practically constant and close to 1 S-300 ratio (low oxidation degree of the magnetic mineralogy) and the mainly neutral pH character at the dam’s upper part. Most maximum concentrations of potentially toxic elements are below the maximum permissible levels for agriculture/residential use, except for those of Pb and Zn, with average enrichment factors above 90 and 50 times the corresponding regional background concentrations, respectively. Simple sample preparation and fast magnetic and X-ray fluorescence elemental concentration measurements, together with a suitable systematic sampling distribution, result in an advantageous proxy method for a quick and cost-effective heavy metal evaluation of mining waste dams.
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墨西哥Taxco矿业废料坝Guerrero I的磁化率找矿及地球化学特征
Taxco的采矿活动产生了七个采矿废物矿床,这对社区健康和整个环境都有问题。这项研究的目标是位于墨西哥格雷罗州北部Taxco de Alarcon以南的格雷罗一号采矿废料坝(该地区最年轻的)。本研究报告了格雷罗一号大坝27个尾矿样品的垂直磁化率勘探结果和地球化学特征。磁性技术的结果为不同矿物成分的矿床层提供了证据,与岩性柱一致。这个相对年轻的大坝的短演化期得到了大坝上部几乎恒定且接近1S-300的比率(磁性矿物学的低氧化度)和主要中性pH特征的证实。除Pb和Zn外,大多数潜在有毒元素的最大浓度都低于农业/住宅使用的最大允许水平,平均富集系数分别高于相应区域背景浓度的90倍和50倍。简单的样品制备和快速的磁性和X射线荧光元素浓度测量,再加上合适的系统采样分布,为快速、经济高效地评估采矿废物坝的重金属提供了一种有利的替代方法。
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来源期刊
Quaternary
Quaternary GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.30
自引率
4.30%
发文量
44
审稿时长
11 weeks
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