针对金属矿山三维建模过程中数据量较小,难以精确还原矿体表面模型的问题,提出了一种穿脉数据约束下的三维矿体表面建模方法.通过分析钻孔数据缺失矿体的数据特征,以矿山工程图中穿脉图与矿体轮廓图为源数据,利用穿脉数据对矿体轮廓线进行约束;在讨论穿脉数据与矿体轮廓线匹配问题的基础上,提出了以穿脉上见矿点与矿体轮廓线的连接方法以及穿脉数据约束矿体表面建模的约束算法.以内蒙古油篓沟矿区为研究对象进行建模.研究结果表明:在穿脉数据约束下的矿体三维建模可以更好地模拟矿体表面形态、提高建模精度,矿体建模插值后的计算结果与生产详查报告进行的储量估算的储量值相差不大,结果较为准确.因此该算法有利于提高矿体储量估算的精度.

内蒙古新地沟金矿是中型绿岩型金矿床,但已属于严重资源危机的矿山,急待寻找接替资源,因此对新地沟金矿床进行深部远景预测具有十分重要的意义.本文根据找矿矿物学和成因矿物学理论,利用显微镜、电子探针及热电仪系统分析新地沟金矿床不同标高和矿段中黄铁矿的热电型标型特征,研究结果表明:新地沟金矿床中黄铁矿的晶型以立方体、五角十二面体及聚形为主;热电系数变化主要集中在-331.10～340.20μV· °C-1范围内,导电型多以N型为主,约占总含量的80％;成矿温度主要集中于250～340℃,属于中温矿床.黄铁矿热电性参数XNP变化范围较大,估算矿体剥蚀率为67.96％～74.31％.通过对黄铁矿导型的空间分布规律和矿体剥蚀分析表明:油篓沟矿段位于矿体中底部,向深部可能有小规模延伸,小西沟矿段钻孔ZK106在深部有较大规模的延伸,其矿化前景最好;小西沟矿段钻孔ZK102深部矿化前景次之;大汗青矿段钻孔ZK2802其深部矿化前景较差.综合分析认为,该矿床深部具有较好的找矿潜力.

The structural layer of Greater Khingan Mountains was known as Paleozoic strata, while its ore-bearing strata were formed in Permian.In this paper, the data of geological mapping and mineral prospecting in recent years has been systematically summarized and studied, combining with gravity and magnetic field characteristics, seismic and magnetotelluric sounding data in this area.The results show that Paleozoic strata serve as the major structural layers in Greater Khingan Mountains, with an important part of Precambrian metamorphic rock series.In addition, the diversified formation mechanism of structural layerhas been discussed.The ore-bearing strata of Greater Khingan Mountains were not only formed in Permian, they were also sourced from Proterozic metamorphic rock series, Paleozoic fold series,Jurassic and Cretaceous strata, as well as various kinds of rock masses and volcanic rocks in Proterozic-Paleozoic, with diversified characteristics.This conclusion provides sufficient theoretical and practical basis to the diversified and multi-mode prospecting ideas in Greater Khingan Mountains.

内蒙古某石墨矿石主要回收矿物为鳞片石墨,针对矿石性质进行了探索试验,最终在合理的工艺流程和药剂制度下,经闭路试验得到了含C固品位90.05%、回收率90.59%的石墨精矿,取得较好的分选效果.

The Xindigou gold deposit in Inner Mongolia is a typical greenstone belt gold deposit. Microscope and scanning electron microscope were used to study the modes of occurrence of gold. 602 grains of native gold were recognized, including inclusion, fissure-filling, and intergranular and interlocking gold. The gold-hosting minerals are mainly pyrite and quartz,which account for 95%of the total gold-hosting minerals, and minor K-feldspar, sericite, siderite, limonite, tetrahedrite, sphalerite, galena were also identified. On the basis of statistics, the gold granularity is mainly characterized by micro extra particulate (0.2-5μm), micro fine particulate (10-20μm), microscopic medium (20-50μm), and micro particulate (5-10μm) grained gold,accounting for 32.23%, 26.91%,20.6%,and 16.11%, respectively. The micro coarse-gained gold which was observed in the sample and under the microscope is relatively minor but plays an important role in the ore grade and total resource. Electron microprobe analysis and phase analysis show that gold occurs mainly as independent gold minerals. The gold minerals are mainly native gold and secondary electrum (the average fineness is 803), which indicates that gold was formed under the condition of medium temperature and depth.

文章介绍了小西沟金矿的矿床地质概况,并对矿石物质成分、金的赋存状态及分布规律进行了分析,得出:金的载体矿物是黄铁矿;金在矿区中部1 590m～1 817m标高范围内以层状、似层状、透镜状呈向斜构造形态产出;金与黄铁矿关系非常密切,并在其中富集。