卡林型金矿的主要特征

一、卡林型金矿概述: (一)区域地质发展史:北内华达州地区的科迪勒拉地槽(Cordille ran Geosyncline)中,自中寒武世到下石炭世沉积了巨厚的沉积物。其西部基本上属优地槽型碎屑岩类沉积建造,主要为细屑沉积岩及硅质沉积岩(碧玉岩、燧石岩等),层间常夹有相当数量的火山岩与火山碎屑岩,地层总厚度约15,000米。东部基本上为冒地槽型碳酸盐沉积建造,以灰岩及白云岩为主,碎屑沉积少量,总厚度近5,000米。东西两部在区域     

西藏尕尔穷铜矿的矿床地质特征及成矿条件浅析

尕尔穷铜矿位于冈底斯早燕山期褶皱系,矿区主要出露白垩系玉多组的一套过渡型至稳定型浅海相碳酸盐岩夹中性火山岩、火山碎屑岩建造。区内以断裂构造为主,呈北东-南西向展布;岩浆活动频繁,以中性-中酸性侵入岩为主。矿体产于中性-中酸性侵入体与碳酸盐岩外接触带。蚀变类型有:矽卡岩化、硅化等。本文介绍了区域地质背景、矿体地质特征、地球物理特征,从地层、构造、岩浆岩等方面讨论了成矿条件,发现该区铜矿的形成与中酸性侵入体,灰岩、大理岩的围岩条件,及区内复杂的构造有密切的成因联系,因此推断该矿床为矽卡岩型。     

探讨新疆大平梁铜矿地质特征与矿床成因

大平梁铜矿是新疆鄯善县近年来发现的一重要的铜矿床,其大地构造位置处于塔里木～华北板块(Ⅰ)塔里木微板块(Ⅱ)库鲁克塔格早古生代前陆盆地。元古宇与下古生界地层在区域上广泛发育,古元古界由双模式变质火山岩组成,部分火山岩及碳酸盐碎屑岩构成中新元古界地层,火山岩及火山碎屑岩共同组成震旦系地层。下古生界浅海相碳酸盐岩、陆源碎屑岩岩层平行不整合覆盖其上。褶皱复式向斜构造是区内的主要构造特征,位于库鲁塔格早古生代前陆盆地内,帕尔干断裂以及兴地塔格断裂对其南北两侧进行控制,加里东晚期侵位的帕尔干岩体是区内的主要岩浆岩。下文对新疆大平梁铜矿地质特征展开分析,并探讨其矿床成因,以供参考。     

新疆哈密市白干湖西铅锌矿矿床特征及找矿模型建立

新疆哈密白干湖西铅锌矿位于阿奇山-雅满苏-沙泉子铁锰铅锌金铜矿带,含矿地层为下石炭统雅满苏组海相碎屑岩、碳酸盐岩。雅满苏组(下石炭统)正常碎屑岩夹碳酸盐与以及碱长花岗岩(三叠纪)相互交接的部位是该矿的主要产出区域。灰岩呈中薄状的灰白色以及砂岩(凝灰质)和细粒岩屑砂岩(灰、灰绿色)是区内的主要矽卡岩原岩,该矿成因类型为矽卡岩型特征。文中笔者对白干湖西铅锌矿矿床特征进行总结,并建立较为详细的找矿模型,为该区进一步找矿提供参考。     

新疆金龙山金矿床地质特征及其成矿化学特征分析

新疆金龙山金矿属于韧性剪切破碎蚀变岩型金矿,大地构造处于觉罗塔格裂陷槽之雅满苏裂谷,韧性剪切带为矿区主要控矿构造,区域沉积建造浅变质的细碎屑岩建造和火山岩建造,异常元素一般为Au、As、Sb、Cu、Mo、Pb、Zn。     

长寿-涪陵地区下三叠统早期地层特征及沉积环境研究

长寿-涪陵地区下三叠统早期地层层位齐全,界线清楚,出露良好,总体岩性以海相碳酸盐岩为主,总厚度达600余米,自西向东碎屑岩逐渐减少,碳酸盐岩逐渐增加。根据地层划分与对比,自下至上、自西而东划分为飞仙关组和大冶组。研究表明,早三叠世早期海平面有弱的振荡升降,为碳酸盐台地-陆棚-海槽沉积环境;至早三叠中晚期,海侵发展到最高峰,沉积一套潮间-潮上的以薄层状灰岩为主的地层,为开阔台地沉积环境。     

探讨红井金矿地质特征及找矿标志

哈密市红井金矿地处新疆哈密市境内,马庄山弧后盆地以及库鲁克塔格-星星峡大陆碰撞带偏东方向(塔里木板块)的位置上是该矿大地构造分布所在,石炭系是该区的主要地层出露,且还有第四系以及长城系与二叠纪和寒武纪地层。红柳园组(下石炭统)是其主要的含矿地层,碳酸盐岩以及火山岩夹碎屑岩是其主要的建造特征。该区断裂构造发育,主要以NE向及NEE向为主,NW向次之。NEE向断裂规模较大,以沙泉子和尖山子峡断裂为主,两条断裂均起着控岩控矿的作用。NEE向断裂及其次级断裂控制着蚀变带及矿脉的分布。岩浆活动频繁,区域火山喷发活动主要发生在石炭世早期,对矿床成矿影响强烈。文中主要对红井金矿地质特征及找矿标志进行探讨,希望为该区找矿工作提供参考。     

西昆仑东段阿羌火山岩成矿类型及成矿潜力分析

阿羌火山岩分布于昆北晚古生代岩浆弧带内,成岩于二叠纪,来源于地幔,形成于裂谷环境,主要为一套基性-中酸性海相火山岩,具双峰式火山岩特征。后经历了绿片岩相变质、强烈韧性剪切变形。在阿羌火山岩内已发现同生顺层产出的塔木其铜锌矿,为火山成因块状硫化物型矿床;多期成矿的苦阿铁金矿,铁矿体是同生矿体,为火山沉积成因,金矿体为后期构造热液活动叠加形成。综合分析阿羌火山岩中可寻找火山成因块状硫化物矿床、火山沉积成因铁矿、蚀变岩型金矿和热液型金铜矿。     

新疆哈密双鱼山金矿地质特征及成因分析

双鱼山金矿是新疆东天山地区新发现金矿,赋矿围岩为浅变质的雅满苏组,为一套沉积细碎屑岩建造和火山岩建造。金矿化受构造及岩体联合控制,主成矿期发生于脉岩形成后的构造破碎及岩石蚀变阶段,矿床为构造蚀变岩型金矿床。     

新疆昭苏县达拉特一带铁矿地质特征及成因探讨

昭苏县达拉特一带铁矿地处天山构造带中段哈尔克山北坡,西与毗邻的哈萨克斯坦国境内的穆云库姆-纳拉特成矿带相接,同处一构造成矿带上,产于一套浅海火山岩建造夹正常碎屑岩中,矿体受达拉特断裂控制,规模较小,呈北东东-南西西向展布,呈脉状,矿体倾角比较陡。矿石自然类型按矿石结构构造可划分为致密块状矿石和块状矿石。成因类型为火山沉积-热液改造型矿床。     

Master alloys Al-Sc-Zr, Al-Sc-Ti, and Al-Ti-Zr: Their manufacture, composition, and structure

Ternary master alloys Al-Sc-Zr, Al-Sc-Ti, and Al-Ti-Zr are prepared. The complex aluminides Al₃(Sc _x Zr_1?x ), Al₃(Sc _x Ti_1?x ), and Al₃(Ti _x Zr_1?x ) in them have the L1₂ cubic lattice, which ensures high structural and size matching with the crystal lattice of the matrix of the aluminum alloys modified by these master alloys. The action of low-frequency vibrations on the melts of the ternary master alloys favors the fragmentation of the aluminides down to sizes smaller than 10–30 μm and their uniform distribution in an alloy matrix.     

Traits and metatraits: Their reliability, stability, and shared genetic influence.

Metatraits measure individual differences in construct relevancy, whereas traits measure individual differences in construct extremity. 24 traits and metatraits were examined in this study using 157 pairs of identical twins reared together, 95 pairs of identical twins reared apart, 211 pairs of fraternal twins reared together, and 228 pairs of fraternal twins reared apart obtained from the Swedish Adoption/Twin Study of Aging (see N. L. Pedersen et al, 1991). Reliability and stability analyses of the metatraits revealed generally lower reliability and stability across time compared to traits. Quantitative genetic analyses of the relationship between traits and metatraits indicated that approximately 69% of the metatrait's genetic variance is shared with the trait, with 31% of its genetic variance unique to the metatrait. These results suggest that metatraits provide a useful additional view of personality. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Temperament, Relationships, and Young Children's Receptive Cooperation With Their Parents.

The authors studied receptive cooperation--a willing, eager stance toward parents--in 15-month-old children (N=101) in broadly ranging contexts. Children's anger proneness and parents' responsiveness (both observed at 7 months) and children's attachment security (assessed in Strange Situation at 15 months) were examined as predictors of children's receptive cooperation at 15 months. In mother-child dyads, secure attachment was strongly associated with children's higher receptive cooperation. Maternal responsiveness in infancy also promoted children's future receptive cooperation, but its impact was moderated by child anger: Responsiveness had a positive effect for children who as infants were highly anger prone. In father-child dyads, the negative effect of anger proneness on receptive cooperation with father was significantly amplified for insecure children. Mother's responsiveness and child's secure attachment to the mother promoted child receptive cooperation with the father, but there were no similar effects for fathers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Practicing school psychologists: Their characteristics, activities, and populations served.

Administered the National School Psychology Questionnaire, which was developed for the present study, to a nationwide, random sample of 877 school psychologists. The measure was designed to assess demographic characteristics, actual and desired activities, and actual and desired amount of time spent with various student groups. Results indicate that the majority of time was spent in assessment (54%), followed by intervention (23%), consultation (19%), and research (1%). A reduction in assessment and increases in intervention, consultation, and research were desired. Ss devoted 84% of their time to exceptional students, whereas they wanted to spend more time with the general school population and less time with learning disabled and mentally retarded students. A regional analysis indicated a more clinical approach to school psychology in the northeastern US and a more assessment-oriented approach in the Southeast. Ss in schools with a student ratio of less than 1:1,500 devoted more time to intervention and less time to assessment than did Ss in schools where the student-to-psychologist ratio was higher. It is noted that, despite the documented desire by school psychologists to alter their roles and functions, few changes in recent practices have occurred. (11 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychotherapy, Classism, and the Poor: Conspicuous by Their Absence.

Four decades of research have delineated the need for improved psychotherapeutic opportunities for poor clients, yet psychotherapists remain contradictory in their stance regarding service to the poor. Despite periodic calls within the field to address the needs of poor people, evidence from the psychotherapeutic literature suggests that the poor are still largely absent from consideration. What barriers prevent psychotherapists from enacting their professional principles more consistently on behalf of poor clients? The author suggests that unexamined classist assumptions constitute a significant obstacle for practitioners and presents the experience of confronting her own classism to illustrate the operation of these attitudinal barriers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Identifying and profiling scholastic cheaters: Their personality, cognitive ability, and motivation.

Despite much research, skepticism remains over the possibility of profiling scholastic cheaters. However, several relevant predictor variables and newer diagnostic tools have been overlooked. We remedy this deficit with a series of three studies. Study 1 was a large-scale survey of a broad range of personality predictors of self-reported cheating. Significant predictors included the Dark Triad (Machiavellianism, narcissism, psychopathy) as well as low agreeableness and low conscientiousness. Only psychopathy remained significant in a multiple regression. Study 2 replicated this pattern using a naturalistic, behavioral indicator of cheating, namely, plagiarism as indexed by the Internet service Turn-It-In. Poor verbal ability was also an independent predictor. Study 3 examined possible motivational mediators of the association between psychopathy and cheating. Unrestrained achievement and moral inhibition were successful mediators whereas fear of punishment was not. Practical implications for researchers and educators are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Review of Attitudes: Their structure, function, and consequences.

Reviews the book, Attitudes: Their structure, function, and consequences edited by Russell H. Fazio and Richard E. Petty (see record 2007-02438-000). Fazio and Pety developed a text of key readings on attitude structure, function, and outcomes. Indeed, the size of the literature under review led the editors to divide the work into two sections: one text targeting attitude structure and function and a second (forthcoming) volume targeting the attitudes and persuasion literature. The text we are reviewing is the first in this two-volume set. Despite the difficulty of the task Fazio and Petty set for themselves, the result is a book that is appropriate for an audience ranging from the advanced undergraduate to the professional academic. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Constructal Theory, Adaptive Motion, and Their Theoretical Application to Low-Speed Turbine Design

Adaptive fin motion has long been the evolutionary means by which birds, fish, and various water-dwelling mammals create a propulsive thrust to propel them either through air or water. During the past decade, this particular phenomenon of kinematic motion has been studied by various scholars to gain an understanding of how and why the large relative efficiencies and body accelerations are attained. Invariably, the studies are interested in gaining an understanding of the phenomena so that these motions and kinematics can be applied to engineering design efforts. Various groups have built propulsive devices that are intended to mimic motions of these highly efficient adaptive motion propulsors with various degrees of successes. This paper summarizes some of these findings, bridging constructal theory and adaptive motions, with emphasis on their application. It also presents results of a research effort made by the writers to incorporate these concepts into low Reynolds number flexible turbine design.