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塘坝金矿区位于甘肃省武都县,属琵琶乡管辖,气候为温暖带大陆性季风湿润气候,区内水系发育,属长江流域嘉陵江水系。塘坝金矿床是赋存在坚硬、半坚硬的碳酸盐岩和碎屑岩层中,灰岩和硅质角砾岩等硬性岩石一般为完整-较完整,岩体结构类型为块状结构,岩石稳定,工程地质条件较好,千枚岩等软弱岩石和断裂影响范围内的岩石一般稳定性差,岩石较破碎,岩体结构类型主要为层状碎裂结构和散体结构。矿区工程地质勘探属于第三类——层状岩类,工程地质勘探的复杂程度划分为中等型,属工程地质条件中等矿床。 相似文献
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崖湾锑矿床位于甘肃省西和县银杏乡崖湾村南约5公里处,气候为温暖带大陆性季风湿润气候,区内水系发育,属长江流域嘉陵江水系。崖湾锑矿是赋存在坚硬、半坚硬的碳酸盐岩和碎屑岩层中,灰岩和硅质角砾岩等硬性岩石一般为完整~较完整,岩体结构类型为块状结构,岩石稳定,工程地质条件较好,千枚岩等软弱岩石和断裂影响范围内的岩石一般稳定性差,岩石较破碎,岩体结构类型主要为层状碎裂结构和散体结构。矿区工程地质勘探属于第三类—层状岩类,工程地质勘探的复杂程度划分为中等型,属工程地质条件中等矿床。 相似文献
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在进行金矿床寻找过程中,岩矿型的金矿类型很多,其中蚀变岩型金矿床是金矿床类型中非常重要也很典型的一个成矿类型范例。蚀变岩型金矿床是一种后期热液参与影响岩石形成的金矿床。是含金热液通过容矿构造内沉淀沉积或围岩通过热(压)力作用热液与岩石发生反应元素的带入带出,近而,岩石发生蚀变岩,金这种有益元素富集形成矿床。蚀变岩型金矿床突出特征一般成矿规模比较大,矿石成分复杂,矿石品位变化幅度小,矿石蚀变清楚。这类矿床的形成不完全依赖于地层和地质年代,在不同区域内形成的矿床,相互间有着巨大的区别,我国很多地区都有这种类型的矿床。下面就来对蚀变岩型金矿床的质地特征及找矿方向进行一下分析。 相似文献
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针对久盛公司金岭金矿东沟矿区岩石破碎、掘进巷道困难、制约工程进度的状况,在探矿巷道进行了支护技术试验。介绍了支护类型选择及锚喷参数的确定,表述了锚杆的安装过程和注意事项以及工程应用效果。通过支护技术的试验和应用,积累了井下掘进工程锚网喷支护技术宝贵的经验,对本矿区其他地段不同类型岩石锚网喷支护具有较强的指导意义。 相似文献
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金宝山铂钯矿是我国近年来发现的贫铜镍大型铂钯矿床,文章通过对云南省弥渡县金宝山铂钯矿地质特征进行分析,认为矿区内铂钯矿体产于含云闪长铁质超基性岩中,呈似层状产出,主要赋存于橄榄岩。矿区内划为三个矿群,上矿群具有块状构造,岩石坚硬、致密,蚀变较强,矿石品位较高;中矿群位于中部,具聚斑状构造,岩石蚀变较弱,矿化度较低;下矿群产于超基性岩体的底部,具填隙状构造,岩石成分较复杂,蚀变较强,厚度稳定-较稳定、矿体形态简单,但是断层破坏较大,勘查类型为Ⅰ类型。 相似文献
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As a parameter that describes heat transmission properties of rocks, thermal conductivity is indispensable for studying the thermal regime of sedimentary basins, and retrieving high-quality data of thermal conductivity is the basis for geothermal related studies. The optical scanning method is used here to measure the thermal conductivity of 745 drill-core samples from the Tarim basin, the largest intermontane basin with abundant hydrocarbon potential in China, and water saturation correction is made for clastic rock samples that are of variable porosity. All the measured values, combined with previously published data in this area, are integrated to discuss the distribution characteristics and major controlling factors that affect the thermal conductivity of rocks in the basin. Our results show that the values of thermal conductivity of rocks generally range from 1.500 to 3.000 W/m·K with a mean of 2.304 W/m·K. Thermal conductivity differs considerably between lithological types: the value of a coal sample is found to be the lowest as being only 0.249 W/m·K, while the values for salt rock samples are the highest with a mean of 4.620 W/m·K. Additionally, it is also found that the thermal conductivity of the same or similar lithologic types shows considerable differences, suggesting that thermal conductivity cannot be used for distinguishing the rock types. The thermal conductivity values of mudstone and sandstone generally increase with increasing burial depth and geological age of the formation, reflecting the effect of porosity of rocks on thermal conductivity. In general, the mineral composition, fabric and porosity of rocks are the main factors that affect the thermal conductivity. The research also reveals that the obvious contrast in thermal conductivity of coal and salt rock with ther common sedimentary rocks can induce subsurface temperature anomalies in the overlying and underlying formations, which can modify the thermal evolution and maturity of the source rocks concerned. This rinding is very important for oil and gas resources assessment and exploration and needs further study in detail. The results reported here are representative of the latest and most complete dataset of thermal conductivity of rocks in the Tarim basin, and will provide a solid foundation for geothermal studies in future. 相似文献
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内蒙红花沟金矿有关岩石中金等微量元素的丰度及其意义 总被引:1,自引:0,他引:1
本文首次系统地研究了内蒙红花沟金矿变质岩、花岗岩、石英斑岩和多种脉岩的Au、Ag等13种微量元素的丰度,并对其在矿源层研究和化探找矿工作中的意义进行了探讨。红花沟金矿各主要岩类的金丰度均在3.18~4.2ppb之间,斜长角闪岩的金丰度为4.2ppb,是金的矿源层。 相似文献
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