湖南香花岭软玉矿的特征与质量的初步研究

摘要

和田玉是我国八千年玉文化传承和发展的重要物质,随着经济的发展,开采技术的不断更新,新疆已不再是和田玉的产地代名词。国内除新疆以外主要有青海的格尔木、辽宁的岫岩、贵州的罗甸、台湾的花莲以及河南的洛阳都发现有软玉矿床。2016年5月,香花岭矿区塘官铺工区发现了疑似软玉的矿石,经过专家的现场考察和鉴定证实了确实有和田玉的产出。

塘官铺工区位于湖南临武香花岭镇癞子岭半山腰的花岗岩与碳酸盐岩接触带处,该矿区主要是锡多金属矿床为主,软玉则只是该矿区的附属矿物。通过对香花岭塘官铺工区的野外地质观察和岩石薄片的分析结果,软玉矿床主要是接触交代型的,花岗岩与钙镁质的碳酸盐岩接触交代形成的,交代作用早期形成了矽卡岩化的透辉石、石榴石等矿物,晚期则形成了含水的硅酸盐矿物,如透闪石、阳起石等矿物,继续交代则又出现钾长石、钠长石等矿物,晚期矽卡岩又氧化为含铍的硅酸盐岩和少量的硫化物,并有石英和云母的伴生矿物。软玉矿脉的宽度为0.5米至2.5米,平均宽约1.5米,多为青色和墨绿色,通过薄片的观察,香花岭软玉内部杂质较多,主要是石英和一些金属硫化物,如毒砂,磁黄铁矿等。软玉的质量与其结构、构造及杂质有明显的关系,如软玉中的透闪石有些呈定向排列分布,透闪石的排列有些呈定向分布,此类透闪石的透明度比较好,但是石英颗粒杂质比较多,油性较差;透闪石呈不定向的纤维状毛毡结构排列的软玉则透明度不好但是油性相对较好,由于此矿区是锡多金属矿床,软玉中常见毒砂、磁黄铁矿等金属矿物。

根据电子探针和X射线荧光光谱的数据分析,软玉中铁的平均含量为4.366%,明显高于新疆、青海的青玉中铁的含量。除了铁含量高外,还有钾、锰、钠、磷、钛、镍、硫、铬、铝等杂质元素的存在,且这些杂质元素的百分比含量达3.318%,这些体现在香花岭软玉上就导致了颜色不均匀,常有白色的脉状、块状杂质和一些暗色的金属颗粒。根据公式Mg/(Mg+Fe2+)得出香花岭软玉的值为0.817,为阳起石玉,这也是香花岭软玉与新疆、青海等地软玉的最大区别。

关键字:香花岭,软玉,接触交代,成分,结构,质量,阳起石

Abstrat

Hetian jade is the jade eight thousand cultural inheritance and the development important matter,with the development of economy,the mining technology constantly updated,is no longer in xinjiang hetian jade's origin.Domestic except xinjiang mainly golmud in qinghai,liaoning xiuyan,guizhou luodian,Taiwan's Hualien and henan luoyang nephrite mineral deposits have been found.In May2016, the XiangHuaLing area TangGuanPu area found suspected nephrite ore,appraised by experts on-site inspection and confirmed that a number of hetian jade output.

TangGuanPu area is located in the hunan linwu XiangHuaLing and carbonate rock contact zone of granite,the mining area is mainly tin polymetallic deposit is given priority to,nephrite is accessory minerals in the mine.Through the fragrant flowers ridge pond shop work area of rock specimen observation and in combination with regional geological data and the analysis results of rock slice,nephrite deposits is primarily contact metasomatic type,granite and calcium magnesium carbonate formed by contact metasomatism,metasomatism early formed silicon card lithified diopside,garnet and other minerals,the late is formed the hydrous silicate minerals, such as tremolite and actinolite mineral,continued to replacement and minerals such as potassium feldspar,sodium feldspar,late skarn aerobic to contain beryllium silicate and a small amount of sulfur,and associated minerals are quartz and mica.Nephrite vein width of0.5meters to0.5meters,the average is about1.5meters wide,much as the blue and green,through thin section observation,fragrant flowers ridge nephrite more impurities,mainly quartz and some metal minerals,such as,arsenopyrite, pyrrhotite,etc.Are distributed in some directional tremolite arrangement,the transparency of such tremolite is better,but quartz particle impurity is more,less oily;Tremolite are arranged in a fibrous felt structure of non-stereospecific nephrite, transparency is not good but oily relatively well,because the second mining area is tin polymetallic deposit,nephrite common magnetic arsenopyrite and pyrite in the metal and mineral.

According to the electron probe and X-ray fluorescence spectrum analysis of data,nephrite fe content to an average of4.366%,significantly higher than that of xinjiang,qinghai sapphire fe content.In addition to the high iron content,and k, manganese,sodium,phosphorus,titanium,nickel,sulfur,chromium,aluminum and other impurity elements,and the percentage of these impurities content reaches

3.318%,these embodies in nephrite fragrant flowers ridge leads to uneven color,often white vein,the massive impurities and some dark metal particles.According to the formula of Mg/(Mg+Fe2+)concluded that fragrant hill has a value of0.817, nephrite Shi Yu for Yang,this is the fragrant hill nephrite and the biggest difference between xinjiang and qinghai nephrite jade.

Key words:.XiangHuaLing,Nephrite,Contact metasomation,structure,element Quality,Actinolite

目录

摘要...........................................................................................................................................................I 第1章引言 (1)

1.1选题及意义 (1)

1.2研究现状 (1)

1.3研究内容和研究方法 (2)

1.3.1野外地质工作 (2)

1.3.2室内研究整理 (3)

1.4主要成果及工作量 (3)

第2章香花岭塘官铺软玉矿床的地质背景 (5)

2.1香花岭矿区的地理位置 (5)

2.2软玉矿床的成因类型 (5)

2.3矿区地质 (6)

2.3.1地层 (7)

2.3.2矿产 (7)

2.4矿床地质 (7)

2.4.1矿体特征 (7)

2.4.2矿物成份 (8)

2.5矿体围岩及其围岩蚀变 (9)

第3章矽卡岩的共生矿物特征 (10)

3.1香花岭矽卡岩矿床 (10)

3.1.1矽卡岩矿床形成原理 (10)

3.1.2香花岭矽卡岩的形成 (12)

3.2共生矿物组合及成矿次序 (15)

3.2.1矿床野外观察 (15)

3.2.2采集矿区样品的实验室检测 (16)

第四章香花岭软玉与和田、青海、贵州地区软玉的对比 (22)

4.1软玉矿床成矿机理的对比 (22)

4.1.1新疆和田的软玉矿床成矿机理特征 (22)

4.1.2青海三岔口软玉矿床成矿机理特征 (22)

4.1.3香花岭塘官铺工区软玉矿床的成矿机理 (23)

4.1.4辽宁岫岩软玉的成矿机理 (23)

4.2香花岭、和田、青海、岫岩软玉成分的对比 (24)

4.2.1香花岭软玉的成分特征 (24)

4.2.2新疆和田软玉的成分特征 (29)

4.2.3青海软玉的成分特征 (29)

4.2.4岫岩软玉的成分特征 (30)

4.2.5结果分析 (30)

4.3香花岭、和田、青海、岫岩软玉结构的对比 (30)

第5章几点认识 (31)

参考文献 (32)

个人简历、申请学位期间的研究成果及发表的学术论文 (34)

致谢 (35)

相关主题
相关文档
最新文档