Secondary mineral formation and trace-element reservoirs in weathered waste rock: Integration of quantitative mineralogy and conventional mineralogical techniques

IF 3.4 2区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Journal of Geochemical Exploration Pub Date : 2024-08-08 DOI:10.1016/j.gexplo.2024.107563

引用次数: 0

Abstract

Sulfide minerals and secondary minerals associated with sulfide oxidation were characterized using automated quantitative mineralogy techniques in samples of weathered and freshly blasted waste rock from the Detour Lake Mine, Ontario, Canada. Associations and mineral habits of secondary minerals suggest heterogeneous and dynamic geochemical conditions within the historical waste-rock pile, and the formation of secondary minerals in microenvironments associated with oxidizing sulfide minerals. Electron-probe microanalyses of sulfide grains and alteration rims applied to the modal mineralogy determined by quantitative mineralogy permitted a calculation of trace elements in these reservoirs. The calculations revealed an under-estimation of trace elements by quantitative mineralogy when mass-balance calculations were considered.

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风化废石中的次生矿物形成和痕量元素储层：定量矿物学与传统矿物学技术的整合

利用自动定量矿物学技术，对加拿大安大略省德图尔湖矿风化和新爆破废石样本中的硫化物矿物和与硫化物氧化相关的次生矿物进行了表征。次生矿物的关联和矿物习性表明，历史废石堆内的地球化学条件具有异质性和动态性，并且次生矿物是在与氧化硫化物矿物相关的微环境中形成的。根据定量矿物学确定的模式矿物学，对硫化物颗粒和蚀变边缘进行电子探针显微分析，可以计算出这些储层中的微量元素。计算表明，如果考虑质量平衡计算，定量矿物学对痕量元素的估计不足。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Geochemical Exploration 地学-地球化学与地球物理

CiteScore

7.40

自引率

7.70%

发文量

148

审稿时长

8.1 months

期刊介绍： Journal of Geochemical Exploration is mostly dedicated to publication of original studies in exploration and environmental geochemistry and related topics. Contributions considered of prevalent interest for the journal include researches based on the application of innovative methods to: define the genesis and the evolution of mineral deposits including transfer of elements in large-scale mineralized areas. analyze complex systems at the boundaries between bio-geochemistry, metal transport and mineral accumulation. evaluate effects of historical mining activities on the surface environment. trace pollutant sources and define their fate and transport models in the near-surface and surface environments involving solid, fluid and aerial matrices. assess and quantify natural and technogenic radioactivity in the environment. determine geochemical anomalies and set baseline reference values using compositional data analysis, multivariate statistics and geo-spatial analysis. assess the impacts of anthropogenic contamination on ecosystems and human health at local and regional scale to prioritize and classify risks through deterministic and stochastic approaches. Papers dedicated to the presentation of newly developed methods in analytical geochemistry to be applied in the field or in laboratory are also within the topics of interest for the journal.