缅甸不同矿点翡翠矿物学特征研究

发布时间：2018-01-12 12:02

本文关键词：缅甸不同矿点翡翠矿物学特征研究　出处：《昆明理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：目前,国内外对于翡翠的研究主要集中在翡翠的矿物组成与矿物结构、翡翠致色机理、翡翠的合成与鉴定和翡翠成因这四个方面。关于缅甸翡翠矿区主要是帕橄矿区(纳莫矿点)的翡翠矿体成因研究。本文主要针对缅甸九个不同的翡翠矿点原石进行偏光显微镜、X射线粉晶衍射、红外光谱、电子探针测试分析,对其主要矿物结构、矿物组成、化学成分进行系统对比研究。1.缅甸翡翠主要结构为粒状及柱状变晶结构。隆肯矿点翡翠主要呈柱状变晶结构,呈定向-半定向排列；美灵江矿点硬玉破碎结构严重。九个矿点翡翠原石主要矿物为硬玉。隆肯矿点翡翠次要矿物为透辉石、绿辉石、钠长石等；达木坎矿点翡翠次要矿物为镁钠闪石、方沸石、透闪石、绿泥石、石英、白云母等；翁巴勒翡翠样品次要矿物为角闪石,钠长石；美灵江矿点翡翠次要矿物为绿辉石和钠长石；南莫卡矿点翡翠次要矿物为透辉石、绿辉石、石英；更因江矿点翡翠次要矿物为透辉石、绿辉石、钠长石、白云母等：纳莫矿点主要矿物为硬玉,次要矿物有钙十字沸石、杆沸石、钠沸石和钠长石。2所有矿点样品测试红外谱峰基本均在1100-600 cm-1中频区和600-300 cm-1低频区,与硬玉标准谱峰基本一致。红外光谱中仅纳莫矿点翡翠样品在3844cm-1处有一宽的吸收带,是该测试样品沸石族中结晶水产生。3.在所采集样品中翁巴勒矿点硬玉A1元素与K元素含量高于其他矿点硬玉中含量；达木坎样品硬玉Na元素含量高于其他矿点硬玉中含量；摩西砂样品硬玉Fe元素含量高于其他矿点硬玉中含量：南莫卡样品硬玉Ti元素含量高于其他矿点硬玉中含量；美灵江样品硬玉Mg含量高于其他矿点硬玉中含量；纳莫矿点的翡翠样品Si元素含量高于其他矿点硬玉中的含量。4翡翠矿物结构紧密,微裂隙与晶体颗粒小,具有柱状结构且能较密集定向排列的翡翠,质地相对较好。柱状和纤维状翡翠愈接近平行排列者透明度越好且质地越佳,而无定向或近于束状和放射状排列者,翡翠质地较差。
[Abstract]:At present, the research on jadeite is mainly focused on the mineral composition and mineral structure of jadeite, and the chromaticity mechanism of jadeite. The synthesis and identification of jadeite jade and the origin of jadeite jade. This paper focuses on the polarizing microscope of nine different emeralds from Myanmar. X-ray powder diffraction, infrared spectroscopy, electron probe analysis, the main mineral structure, mineral composition. The main structure of Myanmar jadeite jade is granular and columnar structure. The jadeite in Meilingjiang ore spot is badly broken. Nine jadeite primary minerals are jadeite and the secondary minerals are diopside, opyroxene, albite and so on. The secondary minerals of jade in Damukan ore spot are magnesium sodium amphibole, donalite, tremolite, chlorite, quartz, Muscovite, etc. The secondary minerals of Umbale jadeite samples are amphibole and albite. The secondary minerals of jadeite in Meilingjiang ore spot are opyroxene and albite. The secondary minerals of jadeite are diopside, omphacite and quartz. The main minerals of Jade are diopside, opyroxene, albite, Muscovite, etc.: the main minerals of Nemo ore spot are jadeite, the secondary minerals are calcium cross zeolite and stem zeolite. The infrared spectra of sodium zeolites and albite samples were basically in the medium frequency region of 1100-600 cm-1 and the low frequency range of 600-300 cm-1. It is basically consistent with the standard spectrum of jadeite. In the infrared spectrum only there is a wide absorption band at 3844 cm ~ (-1) in the sample of Nemo ore spot jadeite. The contents of A1 and K elements in the collected samples are higher than those in the other samples. The Na content in the samples of Damukan is higher than that in the jadeite from other ore spots. The Fe content of jadeite in Mosaic sand sample is higher than that in jadeite from other ore spots: the Ti element content of jadeite in South Mocha sample is higher than that in jadeite from other ore spot. Mg content of jadeite samples in Meilingjiang is higher than that in jadeite from other ore spots. The content of Si element in jadeite samples of Nemo ore spot is higher than that in jadeite of other ore points. 4. The mineral structure of jadeite is compact, the micro fissure and crystal particle are small, the jadeite has columnar structure and can be arranged in dense and directional way. The transparency and texture of columnar and fibrous jadeite were better than those of parallel arrangement, while those with no orientation or near bundles and radial arrangement were worse.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P619.281

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