南岭东段典型矿区岩浆岩物性特征研究

发布时间：2018-06-16 16:51

本文选题：南岭 + 矿集区　；参考：《地学前缘》2017年05期

【摘要】：选取了南岭东段骑田岭、银坑、盘古山、九龙脑等几个较为典型的矿(集)区,对区内不同类型的岩浆岩进行了样品的采集,开展了密度、视极化率、视电阻率、磁化率、声波速度等物性参数测定,对测定结果进行了统计、分析和研究。绘制了岩浆岩物性参数变化规律直方图,对比分析了不同类型矿(集)区岩浆岩各种物性参数的差异,同时利用交会图分析技术对几个矿集区岩浆岩的密度与电阻率、密度与声波速度、电阻率与声波速度参数之间的相关性进行了分析与讨论。论文总结了南岭东段典型矿区岩浆岩物性参数特征:低密度,密度数值变化范围为2.5~2.6g/cm3;中弱磁性,磁化率数值变化范围一般为(2~500)×4π×10-6SI(个别磁性岩体如银坑高山角岩体除外);低极化率,视极化率数值变化范围为0.5%~2%;中高电阻率,视电阻率数值变化范围为2 000~3 500Ω·m;中低速度,横波速度的数值变化范围为2 300~3 000m/s,纵波速度的数值变化范围为3 500~4 500m/s。总体上看,南岭东段岩浆岩物性特征可归纳总结为低密度、中弱磁性、低极化、中高阻和中低速度特征。
[Abstract]:Several typical ore (gathering) areas, such as Qitianling, Yinkeng, Pangushan and Jiulongnao in the eastern section of Nanling, were selected to collect samples of different types of magmatic rocks in the area, and the density, apparent polarizability, apparent resistivity and magnetic susceptibility were carried out. Acoustic velocity and other physical parameters were measured, and the results were statistically analyzed and studied. Histogram of the variation law of physical parameters of magmatic rocks is drawn, and the differences of physical parameters of magmatic rocks in different types of mines are compared and analyzed. At the same time, the density and resistivity of magmatic rocks in several ore concentration areas are analyzed by cross plot analysis technique. The correlation between density and acoustic velocity, resistivity and acoustic velocity parameters is analyzed and discussed. This paper summarizes the characteristics of physical properties of magmatic rocks in typical mining areas in the eastern part of Nanling: low density, numerical variation range of density is 2.5 ~ 2.6g / cm ~ (3), medium and weak magnetism, magnetic susceptibility is generally in the range of Yao 2500) 脳 4 蟺脳 10 ~ (-6) SII (except for individual magnetic rocks such as Yinkeng alpine corner rock mass; low polarizability, The range of apparent polarizability is 0.5 / 2; the range of medium and high resistivity is 2 000 ~ 3 500 惟 / m; the range of shear wave velocity is 2 300 ~ 3 000 m / s, and the range of P wave velocity is 3 500 ~ 4 500 mm / s. Generally speaking, the physical properties of magmatic rocks in the eastern part of Nanling can be summarized as low density, medium and weak magnetism, low polarization, medium and high resistivity and low velocity.
【作者单位】：山西省地球物理化学勘查院;中国地质科学院矿产资源研究所;
【基金】：国土资源部公益性行业科研专项“南岭东段九龙脑矿田成矿规律与深部找矿示范”(201411050) 国家重点研发计划课题“南岭崇义—会昌矿集区三维综合探测与深部成矿预测”(2016YFC06002008)
【分类号】：P588.1;P612

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