新疆青河顿巴斯套金矿床地质特征及控矿因素分析

顿巴斯套金矿床赋存于下石炭统姜巴斯套组浅变质陆源碎屑沉积建造中,金矿化受NWW向脆韧性变形构造带内次级的断裂裂隙、破碎带和挤压片理带控制,赋矿岩性主要为片理化的粉砂岩、岩屑砂岩、砂砾岩,石英闪长玢岩及黄铁矿化石英脉,地层、构造和脉岩控矿作用明显。在充分认识区域成矿地质背景的基础上,着重分析该矿床的地质特征,总结控矿因素及找矿标志,并对研究区的金矿资源潜力进行客观评价。     

内蒙古自治区阿鲁科尔沁旗阿根他拉铜矿床地质特征及成因分析

阿根他拉矿床的控矿层位为二叠系黄岗梁组,矿床由侵入的花岗斑岩、沉积的碳酸盐岩及层间断裂构造破碎带共同控制,围岩蚀变有明显的分带现象,矽卡岩化近岩体处蚀变最强,赋矿岩石为矽卡岩、矽卡岩化大理岩。通过分析研究矿床的地质特征、成矿规律及控矿因素,提高对矿床的控制程度,确定了矿床成因,并指出了找矿标志。     

甘肃杨坪金矿床控矿特征及找矿方向

杨坪金矿床赋存于下古生界丹凤群大草坝组变火山—沉积建造中,金矿化严格受层间挤压破碎（片理化）带控制,赋矿岩性为蚀变的二云石英片岩、绢云母石英片岩、绿泥石英片岩等变质岩及黄铁矿化石英脉,金矿化受变质、构造及次生氧化三重作用控制。对杨坪金矿床的地质特征及控矿特征进行了系统的研究,总结了找矿标志,并指出了找矿方向。     

青海省那尔扎金矿床地质特征及控矿因素

那尔扎金矿床位于东昆仑成矿带东段,矿区内已发现5条金矿化带,共圈定9条金矿体。通过分析成矿地质背景、矿区及矿床地质特征,进而探讨了控矿因素。分析表明:矿体主要赋存在上二叠统格曲组中,围岩蚀变主要有绢云母化、硅化、黄铁矿化、碳酸盐化、褐铁矿化、高岭土化、绿泥石化,其中硅化、黄铁矿化、褐铁矿化与成矿关系密切;断裂构造是主要控矿因素,矿化带和矿体主要受北西西向断裂构造控制。     

大型露天金矿床地质特征、构造—流体控矿作用研究

矿床地质特征与构造-流体强调了控矿对成矿主要因素的影响,因此提出大型露天金矿床地质特征、构造-流体控矿作用研究。通过分析地层序列与地层岩特征,判断成矿温度与压力控矿及矿石成矿特征,为大型露天金矿床勘查工作提供可靠依据。     

双频激电法在青海大灶火沟—黑刺沟金矿区勘查中的应用

在对大灶火沟—黑刺沟金矿区地质特征和矿床地质特征进行探讨的基础上,分析岩(矿)石地球物理特征,开展双频激电法地球物理测量工作。研究表明,矿区范围内北西西向断裂构造控矿、控岩特征明显,围岩蚀变中黄铁矿化、褐铁矿化和硅化与金成矿关系密切;矿致与非矿致激电异常信息明确,具备双频激电法圈定含矿岩层的地球物理前提。本次共圈定激电异常3处:JD1异常由含碳质板岩引起;JD2异常形态较好并具有一定的规模,经验证为矿致异常,是本区的找矿重点部位;JD3异常呈串珠状,由黄铁矿化石英砂岩引起,应重点关注。     

西藏拉抗俄地区铜钼矿地质特征及成因初探

结合最新地质成果,重点对拉抗俄地区铜钼矿(化)点成矿地质特征、控矿因素、物质来源及找矿标志进行了总结、指明了找矿方向。     

分析广西金矿床控矿构造特征及找矿前景

基于广西金矿床控矿构造特征及找矿前景分析,首先要掌握成矿地质概况,然后认真分析矿床地质特征,最后总结金矿床控矿找矿前景,通过这些内容凸显控矿构造特征的价值,为之后的勘查开采人员提供方向。     

广西大瑶山大裕金矿地质特征及找矿预测

大裕金矿位于广西大瑶山成矿带的古袍成矿区带,构造单元属于桂中—桂东台陷大瑶山凸起东端古袍复式向斜南翼,矿区成矿地质条件优越,但由于对成矿规律认识不足,该区找矿工作推进缓慢。选取成矿带内典型的大裕金矿为例,在总结成矿地质特征的基础上,结合钻孔资料及镜下矿石特征,分析了该区金成矿的控矿因素和成矿规律,认为该区主要控矿构造为NEE向F1和F2断裂,赋矿围岩为寒武系小内冲组和黄洞口组浅变质含炭质细碎屑岩,矿化蚀变主要为硅化—黄铁矿化和绢云母化—黄铁矿化—硅化组合蚀变。研究提出该区今后找矿应结合物化探工作,重点找矿方向有:①关注与金成矿关系密切的硅化、黄铁矿化、绢云母(水云母)化及绿泥石化等围岩蚀变线索;②建议在NE-NEE向断裂及其所挟持部位和断裂交会部位开展找矿工作。     

云龙县旧州南山铁金矿床地质特征与控矿因素分析

通过对云龙旧州南山铁金矿床的赋矿地层岩性、控矿构造、围岩蚀变、矿化特征的研究,同时与典型矿床(胶东金矿田)对比,可知云龙县旧州南山铁金矿床的主要控矿要素是多期次断裂构造、高孔隙的石英砂岩、煌斑岩脉及强烈的蚀变作用(硅化、黄铁矿化等),矿床是明显受构造控制的、与岩浆热液活动密切相关的石英脉型、蚀变岩型金矿床。     

济钢常用铁矿石烧结基础特性的研究

介绍了利用微型烧结试验装置,研究铁矿石烧结基础特性的一种新方法。采用微型烧结法,研究了济钢常用铁矿石的同化性、流动性、铁酸钙生成特性和粘结相的强度等特性。试验结果表明,不同铁矿石的烧结基础特性各不相同。铁矿石的烧结基础特性,不仅与焙烧温度、焙烧气氛和碱度等因素有关,而且与铁矿石自身性质(如致密程度,结晶水含量,MgO、SiO2、Al2O3含量和FeO含量等)有关。     

On gender specificity of person characteristics in personnel advertisements: a study among future applications

This research is an examination of how person characteristics mentioned in personnel advertisements influence the judgments of male and female students with regard to their subjective eligibility for, and the attractiveness of, a particular vacancy. The first study showed that many frequently mentioned person characteristics in personnel advertisements applied differently to men and women, but that female characteristics were more in demand than male characteristics. The second study examined to what degree male and female participants felt that they themselves possessed male and female characteristics; results showed that the men were more confident about the degree to which they possessed male and female characteristics than the women were. The third study examined how the type of person characteristics mentioned in personnel advertisements influenced men's and women's judgments regarding their eligibility for and the attractiveness of a particular position. The men found all positions about equally attractive, whereas the women found "male" positions considerably less attractive. Implications of the study are discussed.     

Mg-Al系镁合金半固态组织二次凝固特征

半固态浆料液相的凝固行为决定了其二次凝固组织,这将直接影响半固态成形件的性能.Mg-Al系镁合金随着成分、凝固行为的不同,其二次凝固组织有较大的不同.该文描述了Mg-Al系合金半固态浆料液相凝固过程以及二次凝固组织特征,并针对其特征对其形成原因展开了分析.     

Integrating motivational, social, and contextual work design features: A meta-analytic summary and theoretical extension of the work design literature.

The authors developed and meta-analytically examined hypotheses designed to test and extend work design theory by integrating motivational, social, and work context characteristics. Results from a summary of 259 studies and 219,625 participants showed that 14 work characteristics explained, on average, 43% of the variance in the 19 worker attitudes and behaviors examined. For example, motivational characteristics explained 25% of the variance in subjective performance, 2% in turnover perceptions, 34% in job satisfaction, 24% in organizational commitment, and 26% in role perception outcomes. Beyond motivational characteristics, social characteristics explained incremental variances of 9% of the variance in subjective performance, 24% in turnover intentions, 17% in job satisfaction, 40% in organizational commitment, and 18% in role perception outcomes. Finally, beyond both motivational and social characteristics, work context characteristics explained incremental variances of 4% in job satisfaction and 16% in stress. The results of this study suggest numerous opportunities for the continued development of work design theory and practice. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Age-relevance of person characteristics: Persons' beliefs about developmental change across the lifespan.

The authors investigated normative beliefs about personality development. Young, middle-aged, and older adults indicated the age-relevance of 835 French adjectives by specifying person characteristics as typical for any age decade from 0 to 99 years. With this paradigm, the authors determined age-relevance (How typical is a characteristic for a given age decade?). Most characteristics were ascribed to young adulthood. The pattern differed across the lifespan, however, for positive and negative person characteristics as well as for physical, cognitive, and personal/expressive characteristics. Whereas the total number of ascribed positive characteristics peaked in young adulthood and declined thereafter, the number of ascribed negative person characteristics peaked during adolescence, remained fairly low during middle adulthood, and increased slightly in old age (70+ years). As a consequence, the most positive profile was ascribed to young olds (60 to 69 years), whereas the most negative personality profiles were ascribed to the oldest age groups (70+ years) and to adolescence (10 to 19 years). The negative profiles are primarily due to more negative physical characteristics ascribed to older adults and more negative cognitive characteristics ascribed to adolescence. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

金属消费量与其折旧再生指数之间的关系（Ⅰ）

根据统计资料，将金属消费函数总结为4类基本特征和由基本特征组合成的4种组合特征．分析了金属消费函数表现为基本特征时与其折旧再生指数的变化关系．根据金属折旧再生指数的变化情况，可以分析金属工业中金属折旧再生资源的充足程度．     

甘肃西横沟金矿床地质特征及找矿方向

文章论述了西横沟金矿床的地质特征、矿石类型及组构特征、围岩蚀变、控矿构造特征及找矿标志,指出了进一步找矿的方向。     

Use of a logistic regression model at two levels in the analysis of medical practice variations: the prophylactic cesarean

We show the use of a hierarchical logistic model to study the variations of the prophylactic cesarean section rate between the maternity hospitals of the Rh?ne-Alpes region. These variations are analyzed according to the women characteristics at first level, and the maternity hospital characteristics at second level. We present the two-level hierarchical logistic model and the method of estimation of the fixed and random parameters. Then, we compare and discuss the results obtained with those of the usual logistic model. The usual logistic model underestimates the standard error of the regression parameters. In our example however, the results obtained with the hierarchical model do not modify the conclusions concerning the effect of the women characteristics. All the women characteristics increase significantly the probability for a woman to have a prophylactic cesarean section. Nevertheless, the hierarchical model reveals the effect of the maternity hospital characteristics and shows that the maternity hospitals which receive many "at risk" women tend to perform fewer prophylactic cesarean sections than the others, in women with the same characteristics. It permits to estimate the residual variance of second level linked to the unobserved characteristics of the maternity hospitals. It permits to show that the effect of the main characteristics of the women (previous cesarean section, dystocia, chronic fetal distress) vary between maternity hospitals.