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Variations of OH defects and chemical impurities in natural quartz within igneous bodies

机译：在发泡体内的天然石英中的OH缺陷和化学杂质的变化

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摘要

In this study, we present the first systematic dataset on natural variations of OH defect and trace element contents in quartz within igneous bodies. Samples were derived from bore holes of two plutonic bodies from the Krusne Hory/Erzgebirge (German-Czech border), representing typical A-type (Cinovec/Zinnwald granite cupola) and S-type (Podlesi Stock) granite intrusions. Fourier Transform Infrared spectroscopy of quartz was used to investigate the sample set with regard to its OH defect speciation and content. For Zinnwald quartz, IR absorption spectra reveal different lithologies due to changes of the OH defect inventory, enabling a subdivision of the granitic body: (1) hydrothermal greisen quartz of the uppermost part of the intrusion have low OH defect contents (average of 15 mu g/g H2O); (2) zinnwaldite granite quartz vary strongly in defect content and show the highest content of the dataset (10-70 mu g/g H2O); (3) quartz from an underlying biotite granite have slightly lower, but very uniform contents down to the bottom of the borehole at 1600 m (average 20 mu g/g H2O). Infrared spectra of Podlesi quartz reveal a gradual increase in total defect water content with increasing depth over 350 m (30-55 mu g/g H2O). Lithium contents in quartz samples from the uppermost part of the Zinnwald intrusion correlate with the occurrence of Li-specific OH defects, while cathodoluminescence (CL) images do not show specific differences. Our findings evidence the potential of OH defects in quartz as a tool to decipher differentiation trends in igneous bodies, and the application of their eroded material for provenance analyses.
机译：在这项研究中，我们在石英体内的oh缺陷和痕量元素内容的自然变化中提出了第一系统数据集。来自来自Krusne Hory / Erzgebirge（德国 - 捷克边界）的两个富振型体的孔洞，代表典型的A型（Cinovec / Zinnwald花岗岩Cupola）和S型（Podlesi库存）花岗岩入侵。傅立叶变换红外光谱光谱法用于研究关于其OH缺陷性格纹和含量的样品。对于Zinnwald石英，IR吸收光谱由于OH缺陷库存的变化而显示出不同的岩性，从而使花岗岩体的细分：（1）入侵的最上部的热热比例，具有低OH缺陷含量（平均为15亩g / g h2o）; （2）Zinnwaldite花岗岩石英在缺陷含量中强烈变化，并显示数据集的最高内容（10-70μg/ g H2O）; （3）从潜在的Biotite花岗岩中的石英略低，但在1600米的钻孔底部的内容下含量非常均匀（平均为20μg/ g H 2 O）。 Podlesi石英的红外光谱揭示了总缺陷含水量的逐渐增加，深度增加350米（30-55亩g / g H 2 O）。石英样品中的锂含量来自Zinnwald入侵的最上部与Li特异性OH缺陷的发生相关，而阴极发光（CL）图像没有显示出特定的差异。我们的研究结果证明了石英中oh缺陷的潜力作为破译趋势的蚀刻趋势，以及它们侵蚀材料的出处分析。

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