發(fā)布時(shí)間：2018-09-12 12:52

【摘要】：通過光學(xué)顯微鏡、X射線粉晶衍射、X射線熒光光譜、電感耦合等離子體質(zhì)譜、電子探針等測(cè)試分析手段對(duì)云南保山南紅瑪瑙的巖相學(xué)、礦物組成、化學(xué)成分等進(jìn)行了系統(tǒng)研究,在此基礎(chǔ)上進(jìn)一步通過掃描電鏡、X射線能譜元素面掃描、激光共聚焦顯微拉曼分析了南紅瑪瑙致色礦物形貌、元素分布及礦物物相構(gòu)成。研究結(jié)果表明,保山南紅瑪瑙主要礦物為石英(95%,質(zhì)量分?jǐn)?shù)),主要結(jié)構(gòu)為粒狀結(jié)構(gòu)和纖維結(jié)構(gòu),次要礦物為斜硅石及方解石等,并含有吸附水和結(jié)構(gòu)水兩種狀態(tài)水。致色礦物主要以小于1μm球狀礦物顆粒、2~10μm絮狀似球狀集合體、針狀礦物顆粒和不規(guī)則形態(tài)礦物集合體這4種類型存在,元素分析顯示其為含鐵礦物。顯微拉曼進(jìn)一步確認(rèn)南紅瑪瑙的顏色是由含鐵礦物所致,其中紅色致色主要為赤鐵礦,黃色致色主要為針鐵礦,鐵礦物的具體存在形式及其分布方式對(duì)南紅瑪瑙的價(jià)值具有決定性作用。本工作為南紅瑪瑙礦物學(xué)特性以及致色機(jī)理研究提供了有價(jià)值的參考信息,對(duì)完善其知識(shí)體系和推動(dòng)南紅瑪瑙文化有重要意義,同時(shí)對(duì)借助共聚焦顯微拉曼等微區(qū)表征技術(shù)推動(dòng)寶玉石研究提供了新思路。
[Abstract]:The petrography, mineral composition and chemical composition of red agate in Baoshan, Yunnan Province, were systematically studied by means of X-ray fluorescence spectrum, inductively coupled plasma mass spectrometry and electron probe. On this basis, the morphology, elemental distribution and mineral composition of red agate were analyzed by scanning electron microscope and laser confocal microscopy with X-ray energy spectrum elemental surface scanning and laser confocal microscopy. The results show that the main mineral of red agate in Baoshan is quartz (95%, mass fraction), the main structure is granular structure and fiber structure, the secondary mineral is orthosilicate and calcite, and there are two kinds of water, adsorbed water and structural water. The chromogenic minerals mainly exist in the four types of flocculating spherical aggregates, needle-like mineral particles and irregular mineral aggregates, which are less than 1 渭 m spherical mineral particles and 10 渭 m flocculant aggregates. The elemental analysis shows that they are iron-bearing minerals. Microscopic Raman further confirmed that the color of southern red agate was caused by iron bearing minerals, in which the red color was mainly hematite, and the yellow color was mainly goethite. The specific form and distribution of iron minerals play a decisive role in the value of the southern red agate. This work provides valuable reference information for the study of the mineralogical characteristics and chromogenic mechanism of the southern red agate, and is of great significance to improve its knowledge system and promote the culture of the southern red agate. At the same time, it provides a new way to promote the study of Baojadeite by means of confocal micro-Raman and other microregional characterization techniques.
【作者單位】： 北京大學(xué)地球與空間科學(xué)學(xué)院;北大寶石鑒定中心;
【分類號(hào)】：P619.283

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1 宋曉淳;云南保山南紅瑪瑙的寶石礦物學(xué)研究[D];石家莊經(jīng)濟(jì)學(xué)院;2015年

2 趙云淼;云南保山南紅瑪瑙的寶石礦物學(xué)研究[D];中國地質(zhì)大學(xué)(北京);2015年

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本文編號(hào)：2239060