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钾镁闪石中碳氢化合物研究：原子力显微镜、共聚焦显微镜和拉曼成像的交叉相关分析。

Hydrocarbons in phlogopite from Kasenyi kamafugitic rocks (SW Uganda): cross-correlated AFM, confocal microscopy and Raman imaging.

机构信息

Università di Bologna, Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Piazza di Porta S. Donato 1, 40126 Bologna, Italy.

Università degli Studi di Bari "Aldo Moro", Dipartimento di Scienze della Terra e Geoambientali, Via E. Orabona 4, 70125 Bari, Italy.

出版信息

Sci Rep. 2017 Jan 18;7:40663. doi: 10.1038/srep40663.

DOI:10.1038/srep40663
PMID:28098185
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5241660/
Abstract

This study presents a cross-correlated surface and near surface investigation of two phlogopite polytypes from Kasenyi kamafugitic rocks (SW Uganda) by means of advanced Atomic Force Microscopy (AFM), confocal microscopy and Raman micro-spectroscopy. AFM revealed comparable nanomorphology and electrostatic surface potential for the two mica polytypes. A widespread presence of nano-protrusions located on the mica flake surface was also observed, with an aspect ratio (maximum height/maximum width) from 0.01 to 0.09. Confocal microscopy showed these features to range from few nm to several μm in dimension, and shapes from perfectly circular to ellipsoidic and strongly elongated. Raman spectra collected across the bubbles showed an intense and convolute absorption in the range 3000-2800 cm, associated with weaker bands at 1655, 1438 and 1297 cm, indicating the presence of fluid inclusions consisting of aliphatic hydrocarbons, alkanes and cycloalkanes, with minor amounts of oxygenated compounds, such as carboxylic acids. High-resolution Raman images provided evidence that these hydrocarbons are confined within the bubbles. This work represents the first direct evidence that phlogopite, a common rock-forming mineral, may be a possible reservoir for hydrocarbons.

摘要

本研究采用先进的原子力显微镜（AFM）、共焦显微镜和拉曼微光谱法，对来自乌干达西南部 Kasenyi 钾镁铁质岩石的两种黑云母多型体进行了表面和近表面的交叉相关研究。AFM 揭示了两种云母多型体具有可比的纳米形貌和静电表面电势。还观察到云母片表面广泛存在纳米突起，其纵横比（最大高度/最大宽度）在 0.01 到 0.09 之间。共焦显微镜显示这些特征的尺寸从几纳米到几微米不等，形状从完美的圆形到椭圆形和强烈的拉长形。在气泡上采集的拉曼光谱显示，在 3000-2800cm 范围内存在强烈的卷曲吸收，与较弱的 1655、1438 和 1297cm 处的带相关，表明存在由脂肪族碳氢化合物、烷烃和环烷烃组成的流体包裹体，以及少量含氧化合物，如羧酸。高分辨率拉曼图像提供了证据表明，这些碳氢化合物被限制在气泡内。这项工作首次直接证明，作为一种常见的造岩矿物，黑云母可能是碳氢化合物的一个可能储层。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/fc64be6da4f4/srep40663-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/04e85dcd84b9/srep40663-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/86f594c94f99/srep40663-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/69f869dc7e8f/srep40663-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/c65a9e4465ea/srep40663-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/90d8381752a2/srep40663-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/39cc6db8cb00/srep40663-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/b39670cbc50f/srep40663-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/d15a38dc0451/srep40663-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/fc64be6da4f4/srep40663-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/04e85dcd84b9/srep40663-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/86f594c94f99/srep40663-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/69f869dc7e8f/srep40663-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/c65a9e4465ea/srep40663-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/90d8381752a2/srep40663-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/39cc6db8cb00/srep40663-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/b39670cbc50f/srep40663-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/d15a38dc0451/srep40663-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/311f/5241660/fc64be6da4f4/srep40663-f9.jpg

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