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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Spectroscopic characterisation of moonmilk deposits in Pozalagua tourist Cave (Karrantza, Basque country, North of Spain)
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Spectroscopic characterisation of moonmilk deposits in Pozalagua tourist Cave (Karrantza, Basque country, North of Spain)

机译：波扎拉瓜旅游洞（西班牙北部巴斯克人的Karrantza）中月乳沉积物的光谱表征

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Composition of moonmilk deposits located in different zones of the tourist Dolomite Cave of Pozalagua (Karrantza, Basque Country, North of Spain) was established by Raman spectroscopy. The deposits were located in column bases and detached rocks near a gour full of water or a dripping zone. Hydromagnesite (Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O) with a strong Raman band at 1116cm(-1) and weaker ones at 1522vw, 1487vw, 1452vw, 756w, 727w, 466w, 434w, 371w, 327m, 291w, 258w, 247vw and 230 m cm(-1) was found as the main component of the moonmilk. Aragonite is the unique calcium carbonate compound that sometimes composes the moonmilk but always together with the hydromagnesite. Among non-carbonate minerals, some nitrates (nitrocalcite, niter, nitromagnesite, nitratine and gwihabaite) and sulphates (arkanite) were also identified as minor compounds. Most of the deposits were matt white and pasty, but occasionally some samples appear greyish on the surface. In these samples, carbon particles were also found, apart from the above, and Raman shift changes were observed in the hydromagnesite spectra. Apart from the elements involved in the mentioned minerals, Si, Fe, Mn, Zn and Ti were identified by X-ray microfluorescence as trace elements and the results were correlated with mineral compositions found by Raman measurements. Furthermore, quantification of the soluble salts of moonmilk deposits was carried out by ionic chromatography and the results were chemometrically treated to find correlations among soluble ions and the composition of the mineral phases spectroscopically characterised. (c) 2007 Published by Elsevier B.V.
机译：拉曼光谱法确定了位于旅游胜地波萨拉瓜白云岩洞穴（西班牙北部巴斯克自治区的卡兰察，Karrantza）不同地区的月乳沉积物的组成。沉积物位于柱底和离满水或滴水区很近的碎石附近。菱镁矿（Mg-5（CO3）（4）（OH）（2）中心点4H（2）O），其拉曼谱带在1116cm（-1）处较强，在1522vw，1487vw，1452vw，756w，727w，发现466w，434w，371w，327m，291w，258w，247vw和230 m cm（-1）是月乳的主要成分。文石是独特的碳酸钙化合物，有时由月乳组成，但总是与菱镁矿一起形成。在非碳酸盐矿物中，一些硝酸盐（亚硝酸方解石，硝石，硝酸菱镁矿，硝酸盐和gwihabaite）和硫酸盐（方铁矿）也被确定为次要化合物。大部分沉积物为亚光白色和糊状，但偶尔一些样品在表面上显示为灰色。在这些样品中，除上述以外，还发现了碳颗粒，并且在菱镁矿光谱中观察到拉曼位移变化。除涉及到的矿物元素外，还通过X射线微荧光法鉴定了Si，Fe，Mn，Zn和Ti作为痕量元素，其结果与通过拉曼光谱法测得的矿物成分相关。此外，通过离子色谱法对月乳沉积物的可溶性盐进行定量，并对结果进行化学计量处理，以发现可溶性离子与光谱表征的矿物相组成之间的相关性。 （c）2007年由Elsevier B.V.

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