铊(含铊)矿床找矿某些问题研究

铊（含铊）矿床系指包括Tl、Hg、As、S、Sb、Cu、Ph、Zn、Cd、Ge、Sn、Au和Ag等在内的一套亲铜族元索矿床系列。基于铊地质地球化学,环境地球化学和生物地球化学研究基础,并以铊矿床为例,从铊（含铊）矿物、元素组合、多岩性岩、生物成矿、表生地球化学等5个方面进行了阐述。     

铊成矿地质地球化学特征

迄今为止,铊成矿仅见我国,故研究铊成矿我国应是首开先河。从铊矿床成矿作用研究铊矿床地质地球化学特点,其目的在于强调从生物成矿角度研究微古生物在新陈代谢过程中吸收富集铊成矿和生物残骸积累铊成矿。进而从本质上认识铊在成矿演化过程中地质地球化学和生物化学等多种因素相互作用的特殊成矿机制。     

香泉铊矿化区人体的铊含量特征及环境学意义

香泉铊矿床是安徽省近年来发现和正在勘探的大型铊矿床,为了研究自然状态下的铊矿床对人体及周围环境的影响,分别采集矿床附近和远离矿床的小山井村和大尹村村民(背景区)的尿液和头发,并对其中的铊含量进行测试。结果表明,小山井村村民的尿铊平均质量浓度为1.76μg/L,明显高于健康人群和背景区村民,而头发中铊平均质量比为3.13μg/kg,属于健康人群发铊质量比范围。研究表明,目前矿床中的铊尚未大量迁移进入环境而对村民健康产生明显的危害,但矿床附近村民已表现出铊污染的征兆;此外,本次研究也表明人发中铊含量高低不是铊污染的特征标志。     

我国录铊共生矿床中富铊矿体首次发现及其成因初步研究

通过对贵州兴仁滥本厂汞矿区的实地考查和一系列室内研究工作,发现了自然界极为罕见的红铊矿,并进而肯定了该矿区汞铊共生矿床中有富铊矿体的存在。红铊矿和富铊矿体在我国均属首次发现。根据元素地球化学、矿物包裹体和硫同位素资料,结合矿床的地质特征,从矿源层的形成环境、红铊矿和富铊矿体产出条件、汞铊等成矿元素的活化迁移及其沉淀机制等方面,对矿床的地球化学特征和矿床成因进行了初步讨论,取得了可喜的成果。     

安徽香泉独立铊矿床中含铊黄铁矿的X衍射研究及其矿物学意义

文章对香泉独立铊矿床中7件含铊黄铁矿进行X射线分析,结果表明,含铊黄铁矿的X射线特征衍射峰和强度相对标准黄铁矿均发生变化,表现为衍射线宽化,晶胞参数变大; 黄铁矿的晶胞参数与黄铁矿中铊含量有明显的正相关关系,证实铊在黄铁矿中有2种赋存状态,铊主要以类质同象形式替代铁进入黄铁矿晶格,其次以微细铊矿物包裹体形式产出.     

铊资源的分布及利用中的环境问题

论述了铊在自然界水体、岩石、土壤、沉积物、矿石矿物中的资源分布状况以及开发利用中的环境问题．我国有着丰富的铊资源,是目前世界上惟一发现铊独立成矿的国家,铊资源的开发和利用有着许多得天独厚的优势．阻碍铊大量生产和应用的主要因素是铊剧毒所引起的环境问题．开发利用铊资源还有许多问题要解决．进一步查明我国的铊资源在岩石、水体、土壤中的分布情况,建立铊的分布图,对铊污染进行科学的评价,为防止铊中毒事件的发生,实现土地的安全利用等,对发挥我国的铊资源优势,实现区域经济社会可持续发展等战略目标有着重要的意义。     

我国第一个新铊矿物铊明矾的发现与研究

扼要报道了在我国发现的第一个新铊矿物铊明矾及其主要研究成果。铊明矾是在贵州滥木厂铊 (汞 )矿床富铊矿体氧化带中发现的一个新铊矿物种。与多种次生矿物共生。集合体大小一般为 2 - 10mm ,白色至淡黄色 ,玻璃光泽 ,透明 ,折光率为 1.4 95 ,维氏硬度为 94 -12 4kg/mm2 、摩氏硬度为 3.1- 3.4 ,实测密度 2 .2 2 g/cm3,易溶于水。化学式为 (Tl1.0 0K0 .0 5) 1.0 5(Al1.0 1Si0 .0 2 Ca0 .0 1Mg0 .0 1Fe0 .0 1) 1.0 6[SO4 ]2 .0 2 · 11.86H2 O ,理论式为TlAl[SO4 ]2 ·12H2 O .X射线粉末衍射数据经指标化 ,并参照人工合成TlAl[SO4 ]2 ·12H2 O的资料 ,确定铊明矾为等轴晶系 ,空间群为Pa3,a =12 .2 12 (5 ) 、v =182 1(2 ) 3、Z =4 ,与人工合成物及明矾族的钾明矾、钠明矾和铵明矾为等结构 ,应属明矾族矿物之一 ,其在成分上有别于其他矿物者为一价阳离子为Tl .     

铊中毒及解毒问题探讨

铊及铊化物在现代高科技领域中有着极为重要的用途,但它们均属剧毒物质。小鼠经口急性中毒LD50为21～23.7mg／kg;家兔或狗经静脉LD50为4．5mg／kg。其毒性相当于剧毒农药1605。本文分析了铊及铊化物的中毒原因,中毒机制、定性检测方法及解毒措施,探讨了2,3—二巯丙醇可作铊及铊化物解毒剂的理论依据及解毒机理。     

多元体系萃取分离铊数学模拟

对Ｎ５０３－乙苯－Ｔ１２（ＳＯ４）３－Ｈ２Ｏ－ＮａＣｌ－Ｈ２ＳＯ４，多元体系中萃取分离铊和数学模拟进行了研究，探讨了酸度、料液中铊、氯离子浓度对萃取平衡的影响，得到了萃取平衡等温线，应用线性回归的方法，建立数学解析式，并对半萃酸度与平衡水相铊的浓度进行了定量处理，取得了某些成果，为铊的萃取分离奠定了基础。     

环境中的铊及其健康效应

铊是一种稀有分散元素.近年来随着含铊矿产资源的开发,使较多的铊元素进入环境并在环境当中富集.铊是一种高毒性的物质,通过食物链进入生物圈,对生物体和人体健康产生毒害作用.由于铊对环境造成的影响具有明显的滞后作用,其潜在的危害和威胁远比近期影响严重得多,所以它将成为未来环境中的"化学定时炸弹".     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to