Associations of organic matter with minerals in Tagish Lake meteorite via high spatial resolution synchrotron-based FTIR microspectroscopy
Associations of organic matter with minerals in Tagish Lake meteorite via high spatial resolution synchrotron-based FTIR microspectroscopy
复制标题
通过基于同步加速器的高空间分辨率 FTIR 显微光谱研究塔吉什湖陨石中有机质与矿物质的关联
DOI：
10.1111/maps.12609
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发表时间：
2016
影响因子：
2.2
通讯作者：
Yoko Kebukawa
中科院分区：
文献类型：
--
作者：
Mehmet Yesiltas;Yoko Kebukawa
我们已经调查了空间和光谱之间的联系矿物种类和有机质的塔吉什湖陨石。基于同步辐射的红外显微光谱使我们能够以高空间分辨率在多个塔吉什湖颗粒中定位特定的有机和无机化合物。生成的二维红外图显示了塔吉什湖颗粒中层状硅酸盐中脂肪族C-H和OH之间的强烈空间关联。这些观察表明页硅酸盐在有机质的形成、演化和保存中可能起作用。所有研究的塔吉什湖颗粒的红外光谱显示出很强的碳酸盐带，这也显示出弱，但正相关的有机质在一些颗粒。然而，在碳酸盐和有机物之间没有观察到粒间相关性，这可能是由于碳酸盐产状的差异，例如，页硅酸盐上存在较大颗粒或碳酸盐共生。可能的情况下进一步解释所观察到的有机物与层状硅酸盐和碳酸盐的协会。
We have investigated spatial and spectral associations between mineral species and organic matter in the Tagish Lake meteorite. Synchrotron‐based infrared microspectroscopy allowed us to spatially locate specific organic and inorganic compounds within multiple Tagish Lake grains with high spatial resolution. Generated two‐dimensional infrared maps present strong spatial association between aliphatic C‐H and OH in phyllosilicates in Tagish Lake grains. These observations indicate possible roles of phyllosilicates for the formation, evolution, and preservation of organic matter. Infared spectra of all studied Tagish Lake grains show a strong carbonate band, which also shows a weak but positive correlation with organic matter in some grains. However, intergrain correlation was not observed between carbonates and organics, which is likely due to the difference of carbonate occurrence, e.g., presence of larger grains or intergrowth of carbonates on phyllosilicates. Possible scenarios further explaining the observed associations of organics with phyllosilicates and carbonates are presented.