老挝Boloven高原玄武岩风化壳中稀土元素富集与主量元素关系

老挝南部Champasak省东北部Boloven高原玄武岩喷发于晚中生代．新生代，在长期热带季风型气候和热带季雨林植被条件下，高原玄武岩上已经发育砖红壤型风化壳。在一条风化壳剖面上采集了11件样品并在室内细碎到200目，使用X射线荧光光谱仪分析了11个样品中的主量元素含量，使用ICP-Ms分析了11件样品REE含量。结果表明，玄武岩风化壳中主量元素Na2O和MgO淋失量最大，K2O和CaO淋失量次之，并在淋失一定程度后淋失速度减慢；样品LR157和LR158中TiO2，P2O5分别为6．07％，1．45％和8．43％，0．82％，为整个剖面中的最高值；CaO的含量是松散风化产物中的最高值。风化玄武岩（LR140，LR141）的∑REE较低，为57．8×10^-6和87．9×10^-6；随着玄武岩风化程度和成壤作用的加强，∑REE逐渐富集，并在风化壳表土下（LR157，LR158）达到最高值1003×10^-6和775×10^-6。风化壳中LREE／HREE值为3．59～14．9，稀土元素分布型式属轻稀土富集型。随着风化程度加深，ce由弱负异常逐渐变为强正异常，而Eu由弱正异常逐渐变小并呈现出强负异常，整个剖面中ce正负异常和Eu正负异常的变化幅度较大。REE在剖面中的分布与含TiO2，P2O5的矿物有明显的相关关系，并且在TiO2，P2O5含量最高的样品LR157和LR158中最为富集。REE富集和Ce正异常出现在pH值为5．23～6．12的酸性和Fe^2＋／Fe^3＋为0．007～0．13的氧化环境下，证明在酸性氧化环境也能出现REE富集.

湖南沃溪钨-锑-金建造矿床同生成因的微量元素和硫同位素证据

对岩矿石和矿物的微量元素、稀土元素和硫同位素地球化学的研究表明，湖南沃溪钨-锑-金建造矿床系海底同生热水沉积作用的产物。矿石与围岩中微量元素和稀土元素含量的变化关系，反映了一种复杂的热液、海水以及陆源碎屑的联合影响。矿石及其中矿物(石英)的稀土元素配分模式可与许多沉积喷流型(sedex型)块状硫化物矿石及其共生的喷流岩相对比，暗示了两者具有相似的形成机理。矿石的硫同位素资料显示，生物成因硫与热液成因硫(下伏沉积柱中硫化物的溶解和／或部分海水硫酸盐的还原)共同参与了成矿作用过程.

粤北红岭钨矿中辉钼矿Re-Os同位素年代学及其地质意义

跃北红岭钨矿为产在热水复式岩体之中的中型钨多金属矿床, 矿化类型为石英脉型黑钨矿化和蚀变花岗岩型白钨矿化。对矿区含矿石英脉中8个辉钼矿样品进行Re-Os同位素测定, 获得等时线年龄及模式年龄的加权平均值分别为159.1±1.5Ma和158.8±0.88Ma. 等时线纵截距为-0.010±0.041, 说明样品中不存在可测定的初始187Os. 统计表明南岭地区中东段钨锡矿床的成矿年龄多集中在150~160Ma。粤北已有的几个钨矿成矿年龄与区域燕山期花岗岩大规模侵位时期一致，表明南岭地区花岗岩成岩成矿可能不存在明显的时差。

A study of a molecular mechanics field used in simulating enantiorecognition

A molecular mechanics field, Alchemy II, was utilized to model the chiral recognition between S-N-acetyl-alpha-methyl-alpha-naphthylamine and (R, S)-N-(3, 5-dinitrophrnyl)-alpha-methyl-benzeneacetamide and between beta-cyclodextrin and (R, S)-fenoprofen. Some preliminary results have: been obtained to sustain the three-point action models and the induce-fit action in enantiorecognition.

Study of the molecular configuration and the dipole moment in fluorinated liquid crystals

We have investigated the relationship between the molecular configuration and dipole moment of some fluorinated liquid crystals (LCs). The aeornetries of the molecules were preliminarily optimized at empirical AM1 and then were further optimized at B3LYP/6-31G(d) level. The dipole moment has been calculated. It is strongly influenced by the position and number of fluorine substituents in the benzene ring of the molecule. The polarizability, mean polarizabilities, and anisotropic polarizability of the phenylbicyclohexane (PBC) fluorine substituents are also given and discussed. (c) 2004 Wiley Periodicals, Inc.

Feedback Unbound: from master to usher.

A major theme of this book is that feedback should encourage dialogue; between students and lecturers, amongst peers and individually, as a form of self-critique and reflection. Here we endorse that theme but also propose an understanding of dialogue that goes beyond simple exchang or the presence of two or more voices. Inspired by Freire’s (1996) critical pedagogy we seek to make a link between the social nature of learning, the social nature of dialogue and the role of feedback as dialogue in a broader transformative learning process, and not merely as an adjunct to assessment.

The Criminalization of Mass Starvations: From Natural Disaster to Crime Against Humanity

Edkins Jenny, 'The Criminalisation of Mass Starvations: From Natural Disaster to Crime Against Humanity', In: 'The New Famines: Why Famines Persist in an Era of Globalisation', (New York: Routledge), pp.50-65, 2006 RAE2008

Keats's Boyish Imagination

Marggraf Turley, Richard, Keats's Boyish Imagination (New York: Routledge, 2003) RAE2008

A Performance Cosmology (Testimony from the Future, Evidence of the Past)

Gough, Richard, et al., A Performance Cosmology (Testimony from the Future, Evidence of the Past) (New York: Routledge, 2006), pp.xi+324 RAE2008

Desire Amongst the Dodgems: Alain Platel and the Scene of Seduction

Kear, Adrian, 'Desire Amongst the Dodgems: Alain Platel and the Scene of Seduction', In: Contemporary Theatres in Europe: A Critical Companion, Joe Kelleher and Nicholas Ridout (eds), (New York: Routledge), pp.106-119, 2006 RAE2008