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A new methodological approach (QEMSCAN®) in the mineralogical study of Polish loess: Guidelines for further research
Open Geosciences ( IF 1.7 ) Pub Date : 2020-07-14 , DOI: 10.1515/geo-2020-0138
Piotr Kenis 1, 2 , Jacek Skurzyński 1 , Zdzisław Jary 1 , Rafał Kubik 2
Affiliation  

Abstract This article presents in detail the methodology dedicated strictly to loess mineralogical investigation by automated mineralogy system QEMSCAN® (quantitative evaluation of minerals by scanning electron microscopy (SEM)), which couples SEM and energy dispersive X-ray spectrometry to automatically deliver mineral and phase mapping. The present study provides guidelines for further loess investigation in Poland, in order to maintain the complete comparability of results which will be obtained. The methodology is then used to obtain the data on complex mineralogical composition (heavy, light, transparent and opaque phases). In total 1,159,107 particles have been measured for five bulk loess samples and 4–6% of them were heavy minerals (c.a. 10,000 per sample). The bulk samples are dominated by quartz (57.3–62.9%) and contain plagioclase (7.8–9.2%), K-feldspar (7.9–8.7%), carbonates (5.0–7.8%), muscovite (3.2–6.2%), biotite (4.2–7.5%), heavy minerals (4.3–5.8%) and clay minerals (0.9–1.6%). The heavy minerals (as a group recalculated to 100%) are mainly represented by phases such as clinopyroxene (38–51%), garnets (14–21%), TiO2 polymorphs (8–12%), Al2SiO5 polymorphs (3–7%), ilmenite (3–6%), iron oxides, e.g., hematite and magnetite (2–5%) and zircon (∼2%). Nearly 50% of the heavy minerals is classified in the 16–31 µm fraction, which determine the changes in the current research procedure traditionally used for Polish loess.

中文翻译:

波兰黄土矿物学研究中的新方法学方法 (QEMSCAN®):进一步研究指南

摘要 本文详细介绍了通过自动矿物学系统 QEMSCAN®(通过扫描电子显微镜 (SEM) 对矿物进行定量评估)专门用于黄土矿物学调查的方法,该系统将 SEM 和能量色散 X 射线光谱法相结合,自动提供矿物和相映射。本研究为波兰进一步的黄土调查提供了指导方针,以保持将获得的结果的完全可比性。然后使用该方法获得复杂矿物组成(重相、轻相、透明相和不透明相)的数据。总共测量了 5 个大块黄土样品的 1,159,107 个颗粒,其中 4-6% 是重矿物(每个样品约 10,000 个)。大块样品以石英(57.3-62.9%)为主并含有斜长石(7. 8–9.2%)、钾长石 (7.9–8.7%)、碳酸盐 (5.0–7.8%)、白云母 (3.2–6.2%)、黑云母 (4.2–7.5%)、重矿物 (4.3–5.8%) 和粘土矿物质 (0.9–1.6%)。重矿物(作为一组重新计算为 100%)主要以单晶辉石(38-51%)、石榴石(14-21%)、TiO2 多晶型(8-12%)、Al2SiO5 多晶型(3-7 %)、钛铁矿 (3-6%)、氧化铁,例如赤铁矿和磁铁矿 (2-5%) 和锆石 (~2%)。近 50% 的重矿物被归类为 16–31 µm 级分,这决定了当前传统上用于波兰黄土的研究程序的变化。重矿物(作为一组重新计算为 100%)主要以单晶辉石(38-51%)、石榴石(14-21%)、TiO2 多晶型(8-12%)、Al2SiO5 多晶型(3-7 %)、钛铁矿 (3-6%)、氧化铁,例如赤铁矿和磁铁矿 (2-5%) 和锆石 (~2%)。近 50% 的重矿物被归类为 16–31 µm 级分,这决定了当前传统上用于波兰黄土的研究程序的变化。重矿物(作为一组重新计算为 100%)主要以单晶辉石(38-51%)、石榴石(14-21%)、TiO2 多晶型(8-12%)、Al2SiO5 多晶型(3-7 %)、钛铁矿 (3-6%)、氧化铁,例如赤铁矿和磁铁矿 (2-5%) 和锆石 (~2%)。近 50% 的重矿物被归类为 16–31 µm 级分,这决定了当前传统上用于波兰黄土的研究程序的变化。
更新日期:2020-07-14
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