石平川钼多金属矿区构造特征浅析

浙江省石平川钼矿位于浙江东南沿海火山活动带。通过研究表明石平川钼矿应为典型的石英脉型钼矿,该区含矿断裂构造以北西向为主,其次为近东西向、北东向、近南北向等。断裂的这些产出样式是受到区域应力场控制的结果。石平川火山穹窿的环状断裂发育于岩体的内、外接触带,空间延伸远,常由数条平行断裂组成长几百米~上千米,宽几十米的裂隙带,这些构造裂隙是石平川矿区主要容矿构造。     

浅论PROENGINEER软件在地质勘查与开发中的应用

PROENGINEER软件能够快速创建矿体与矿山工程的三维模型,快速分析矿体空间连接的合理性、工程布置的恰当性,并能够自动进行资源量计算,参数化调整矿体形状等实用功能,可以将不同矿体单独建模并组装为一个整体,在矿山勘查、开发中具有较强的实用功能,目前已经在福建某铅锌钼矿和湖南的某铜钴矿得到较好的实践。     

福建平和锦溪铜、钼矿地质特征及成因探讨

平和锦溪铜钼矿区域构造位于福安—南靖（北东向）深断裂与上杭—云霄（北西向）深断裂交汇部位,矿区矿体受区内3条北东向逆断层控制,成矿作用主要是热液交代充填形式,多充填于断层间及其衍生的次一级节理、裂隙、碎裂密集带中,矿体呈透镜状、大透镜状、似层状、脉状。通过对平和锦溪铜、钼矿的地质特征及成因的分析和总结,认为在早白垩世中-晚期,在断裂错位作用下和应力不断转换的条件下,矿围岩容易产生规模较大的强烈挤压破碎带,深部岩浆期成矿热液不断沿断裂面上升沉淀,在断裂构造交接复合部位富集成矿形成矿床,矿床成因类型为热液交代及充填型铜、钼矿床。     

福建福安纸坪钼矿地质特征及找矿方向分析

该钼矿是一个规模小、矿石物质成份简单的钼矿床。矿体受断裂裂隙控制,与硅化、黄铁矿化关系密切。要想寻找到规模较大的钼矿体,应在南园组地层及岩体接触带附近寻找强硅化、黄铁矿化、绿泥石化蚀变破碎带,测区杨厝里——粗坑一带是较有利的找矿地段。     

三山岛金矿新立矿区西南翼成矿规律浅析

新立矿区-200米中段是新立矿区主要供矿的运输巷道,也是新立矿区矿体在西南走向上已探明最远的一个中段。通过坑探工程揭露发现,此段控矿主裂面及矿体和以前的矿体产状有一定的变化,弄清此中段矿体的走向产状和岩石及水文条件对于矿区-200中段的以下的西南部探矿工程和采准工程的布置有重要的指导意义。     

贵州省织金县新华磷矿果化矿段控矿因素及富集因素探讨

贵州省织金县新华磷矿果化矿段位于织金县以东,矿体呈层状产出,含矿岩系位于下寒武系戈仲伍组,岩性主要为含磷白云岩、磷块岩,脉石矿物为白云石、方解石、石英、黄铁矿、粘土矿物等。矿体受灯影组古侵蚀面的凹凸而增厚、变薄。     

中厚近水平矿体采矿技术探讨

开磷集团牛赶冲矿段E65～E66S+120在970m水平由于受F41大断层及其派生断层的作用,矿体在倾向上变缓,厚度叠加,形成中厚近水平矿体。由于以前的矿体都是倾斜矿体,矿体发生变化,就决定了采矿方法也要发生一定的变化。文章针对中厚近水平矿体采矿方法进行探讨,可供相赋存相近的矿体开采参考。     

充填采矿法在高寒草原环境下的应用

阿尔哈达铅锌矿对局部品位较高、矿体不稳固矿段采用进路法开采。上向进路尾砂胶结充填采矿法矿体沿矿体走向布置,矿体长100m左右,进路断面为（3.5-4）m×（3.5-4）m。充填系统的充填方式可以采用分级尾砂水砂充填及水泥胶结充填两种方式,充填材料的浓度在65%-70%之间。采场充填前先在进路的入口处采用木桩及木板建筑充填挡墙,里面用塑料编织袋或者草袋去做滤水层,待充填进路和充填挡墙的之间的缝隙要用水泥砂浆封闭,防止跑浆漏浆。     

河南前河金矿葚沟矿段地质特征及成因研究

葚沟矿段金矿矿床赋存于近东西向的F4断裂构造带中,矿区内称为Ⅳ号矿带。Ⅳ号矿带在葚沟矿矿段形成东、西两个矿化富集地段,西段以中深矿化较强,东段以浅部矿化较强.结合区内围岩蚀变类型与成矿有关的蚀变矿物组合的相互关系认为,该矿床成因类型属构造蚀变岩型中低温热液金矿床。     

会泽铅锌矿矿山厂1752中段6号矿体地质特征

本文以会泽铅锌矿床为研究对象,通过对比1752中段13~#和6~#出矿道地质及6号矿体的矿体特征,主要得到了以下认识:矿体铅锌矿均赋存于摆佐组(C1b)层位中,岩性为中粗晶白云岩。矿体主要走向为NW-SE,自13~#-6~#出矿道为145°方向,矿体呈现水平方向逐渐尖灭的特点,矿体整体受NE向构造控制。蚀变岩主要为针孔状、粗晶白云岩,呈透镜状、脉状产出,而沉积岩主要为细晶灰岩、白云质灰岩。闪锌矿、方铅矿、黄铁矿为最主要的矿石矿物。脉石矿物主要为白云石、方解石、黄铁矿。     

The Nexus of Population,Energy, Innovation,and Complexity

For the past 200 years, humans have benefited from the abundant, inexpensive, and easily obtained energy of fossil fuels. Energy surpluses such as this are unusual in human history. In systems with little surplus energy, population growth is low and complexity emerges slowly due to the energetic costs it carries. On the rare occasions when energy is readily available, societies respond by growing rapidly. They must become more complex in response to the social, economic, and resource challenges of dense population. More complex societies are more expensive, requiring greater energy per capita. The process of increasing complexity necessitates greater energy production, creating a positive feedback cycle. Past societies have collapsed under such pressures. Population and complexity grew rapidly when the Industrial Revolution replaced economies based on annual solar radiation with economies fueled by fossil energy. The Green Revolution of the 20^th century is credited with preventing mass starvation, but it has made food production and sustaining population ever‐more dependent on high‐energy (low‐entropy) inputs. Some believe innovation will overcome the limitations of resources and permit unchecked growth. However, increases in complexity, innovation, and fossil energy are all subject to diminishing returns, and cannot continue to support population at current levels.     

我国人口资源环境与经济的可持续发展

为了保持经济又好又快的发展,应该正确处理人口、资源、环境与经济的关系;必须长期坚持计划生育的基本国策,控制人口增长的数量,提高人口的质量,减轻过多的人口对资源和环境的压力;提高自主创新能力,转变经济增长方式,发展循环经济,节能减排,建设资源节约型、环境友好型社会,走新型工业化道路,实现可持续发展战略。     

Transversals, systems of distinct representatives, mechanism design, and matching

A transversal generated by a system of distinct representatives (SDR) for a collection of sets consists of an element from each set (its representative) such that the representative uniquely identifies the set it belongs to. Theorem 1 gives a necessary and sufficient condition that an arbitrary collection, finite or infinite, of sets, finite or infinite, have an SDR. The proof is direct, short. A Corollary to Theorem 1 shows explicitly the application to matching problems. In the context of designing decentralized economic mechanisms, it turned out to be important to know when one can construct an SDR for a collection of sets that cover the parameter space characterizing a finite number of economic agents. The condition of Theorem 1 is readily verifiable in that economic context. Theorems 2–5 give different characterizations of situations in which the collection of sets is a partition. This is of interest because partitions have special properties of informational efficiency.     

ICP测定土壤中的K,Na,Ca,Mg,Fe

本论文采用等离子体发射光谱法(ICP-AES)土壤中的K,Na,Ca,Mg,Fe进行了测定,样品以四酸体系溶矿,不经分离杂质,即可直接测定。本法通过优化实验条件确定了最佳分析波长,该测定方法检出限为:0.006~0.0186mg/ml,RSD%为:0.5032%~1.030%,双差均小于1,回收率为99.41%~100%。准确度和精密度较高,方法快速简单,预处理简单,分析流程短,完全满足地质工作要求。     

Structural estimation of caloric intake,exercise, smoking,and obesity

The escalating rate of obesity in the US highlights the importance of understanding the causes for this rise. In this paper I employ the First, Second, and Third National Health and Nutrition Examination Surveys to estimate a structural model of the determinants of adult obesity. To control for the potential endogeneity of some explanatory variables, such as caloric intake (adjusted for activity level) and smoking, a set of reduced form equations for these outcomes is estimated simultaneously with the obesity equation. To identify each equation, I use an array of state-level characteristics as instrumental variables. Trends in these variables shed light on the sources of the rapid increase in obesity since 1980.