青海花脖湾石英岩特征及其沉积环境分析
发布时间：2018-08-31 14:35
【摘要】：花脖湾石英岩矿赋存于长城系磨石沟组,矿石质地纯净且变化稳定,这与沉积环境关系密切。在详细研究石英岩矿物组成、嵌布粒度特征和分析化学成分与石英粒径关系的基础上,探讨了磨石沟组沉积环境对石英岩特征的影响关系,并提出了相关的开发利用建议。结果表明:花脖湾石英岩的平均w(SiO_2)为97.09%,石英粒度集中分布在0.098mm~0.26mm内;在区域北西(前滨)-南东(临滨)方向上,随着石英粒径减小,杂质含量逐渐增多,石英岩w(SiO_2)由99.10%降低到93.64%,与平均嵌布粒度的相关系数达到87.7%;磨石沟组沉积环境为高能碎屑海岸的滨浅海沉积,沉积分选作用直接控制了碎屑沉积物的矿物组成和粒度分布,化学元素配分受白云母含量变化影响;花脖湾石英岩矿资源前景良好,应根据沉积环境变化特征对其进行梯度开发利用。
[Abstract]:Huaowaowan quartzite deposit is located in the Moshigou formation of the Great Wall system, and its texture is pure and stable, which is closely related to the sedimentary environment. On the basis of the detailed study of the mineral composition of quartzite, the distribution of granularity and the relationship between the chemical composition and the size of quartz, the influence of sedimentary environment of Moshigou formation on the quartzite characteristics is discussed, and the relevant suggestions for development and utilization are put forward. The results show that the average w (SiO_2) of quartz rock in Huaowawan is 97.09, the grain size of quartz is concentrated in 0.098mm~0.26mm, and the impurity content increases with the decrease of quartz particle size in the north-west (foreshore) -south (coastal) direction of the region. The SiO_2 decreased from 99.10% to 93.64%, and the correlation coefficient with the average intercalated granularity reached 87.7.The sedimentary environment of the Moshigou formation is the shoreline sediment of the high-energy clastic coast, and the sedimentary separation directly controls the mineral composition and particle size distribution of the clastic sediments. The distribution of chemical elements is affected by the change of Muscovite content, and the quartzite resources in Huaowaowan have a good prospect, which should be exploited and utilized gradient according to the variation characteristics of sedimentary environment.
【作者单位】： 西南科技大学矿物材料及应用研究所;西南科技大学分析测试中心;中国建筑材料工业地质勘查中心青海总队;
【基金】：四川省创新团队项目(No.14TD0012)
【分类号】：P619.233
[Abstract]:Huaowaowan quartzite deposit is located in the Moshigou formation of the Great Wall system, and its texture is pure and stable, which is closely related to the sedimentary environment. On the basis of the detailed study of the mineral composition of quartzite, the distribution of granularity and the relationship between the chemical composition and the size of quartz, the influence of sedimentary environment of Moshigou formation on the quartzite characteristics is discussed, and the relevant suggestions for development and utilization are put forward. The results show that the average w (SiO_2) of quartz rock in Huaowawan is 97.09, the grain size of quartz is concentrated in 0.098mm~0.26mm, and the impurity content increases with the decrease of quartz particle size in the north-west (foreshore) -south (coastal) direction of the region. The SiO_2 decreased from 99.10% to 93.64%, and the correlation coefficient with the average intercalated granularity reached 87.7.The sedimentary environment of the Moshigou formation is the shoreline sediment of the high-energy clastic coast, and the sedimentary separation directly controls the mineral composition and particle size distribution of the clastic sediments. The distribution of chemical elements is affected by the change of Muscovite content, and the quartzite resources in Huaowaowan have a good prospect, which should be exploited and utilized gradient according to the variation characteristics of sedimentary environment.
【作者单位】： 西南科技大学矿物材料及应用研究所;西南科技大学分析测试中心;中国建筑材料工业地质勘查中心青海总队;
【基金】：四川省创新团队项目(No.14TD0012)
【分类号】：P619.233
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