R型因子分析在地球化学数据统计中的应用

因子分析是一种多元统计分析方法,在地球化学数据研究中常用其解决复杂的地质成因及矿化叠加问题。本文利用R型因子分析对清水-张家川一带的1:5万水系沉积物样品数据进行处理,计算其因子得分,圈定因子得分异常图,并与区内地质作用相联系,取得了一定的效果。因此利用因子分析可为地球化学数据解释提供重要依据。     

1∶25万宣城幅(安徽部分)水系沉积物测量元素组合特征与地球化学分区

为研究1∶25万宣城幅(安徽部分)水系沉积物测量元素组合特征与地球化学分区,通过对研究区内水系沉积物中16种地球化学元素Ag、As、Au、Cu、Mo、Bi、W、Pb、Zn、B、F、Hg、Sn、Sb、Th和U进行因子主成分分析,亦即R型因子分析。提出了该地区具有代表性的6种因子组合:因子1组合为Mo、U、Ag、Zn、Sb、Cu;因子2组合为Hg、As、Sb、B;因子3组合为Pb、Sn;因子4组合为W、Bi;因子5组合为Au、Cu;因子6组合为Th、B。并分别绘制出了研究区内6种因子组合的因子得分异常分布图,结合该区域地质特征,对6种因子所代表的元素组合及地球化学分区特征进行了探讨。     

甘肃天水火鸡山地区土壤地球化学异常信息提取与评价

以甘肃天水火鸡山地区1∶10 000土壤地球化学测量的12种元素质量分数为基础,应用因子分析提取4个具有代表性的因子,得到地球化学因子得分图,根据各因子与其地质背景的对应关系,了解各元素共生组合规律特征.为进一步从研究区复杂地球化学背景中分离出与成矿有关的地球化学异常信息,应用多重分形滤波技术分离各元素异常和背景场,强化弱异常,提取致矿异常.为提取研究区组合元素异常,将因子分析法与多重分形滤波技术相结合,得到异常和背景分布图,根据异常分布图识别组合元素异常.结果表明:F1因子Au-Ag-Pb-Zn-Sb组合为主成矿元素组合,研究区内金、银等多金属成矿潜力巨大,为研究区化探异常的合理圈定与优选找矿靶区提供科学依据.     

红柳沟—拉配泉蛇绿构造混杂岩带岩体地球化学特征及地质意义

为了查明阿尔金造山带构造演化特征,文中通过对红柳沟-拉配泉蛇绿构造混杂带中大量早古生代基性—超基性和酸性岩的调查研究和岩石地球化学分析,结果表明:基性岩体富集Rb,Ba大离子亲石元素和U,La,明显亏损Nb,Ta,Sr等高场强元素,具有弱的铕负异常特征(δEu=0.78~1.08),显示了MORB型和OIB型玄武岩特征;中酸性岩体主要岩石类型包括闪长岩—石英闪长岩—花岗闪长岩—二长花岗岩,地球化学显示与俯冲—碰撞作用相关的岩浆岩特征。结合区域地质背景,揭示了阿尔金造山带在早古生代处于洋陆转化的构造演化阶段。     

因子分析在寻找多金属矿中的应用——以河北某地区为例

利用因子分析,对河北某地区1:5万地球化学测量数据进行了分析,提取出6个代表性因子,利用GIS自动绘制了因子得分图,并通过地质背景综合分析,研判了各因子得分图与地质背景的对应关系。依据因子分析,对应地球化学图,结合工作区地质特征及野外调查成果,共圈出45处综合异常,并提出金银矿同类成矿模型。根据找矿靶区划分原则,圈出7个成矿远景区、5个找矿靶区。     

玛兴大湾铜矿区地质特征及找矿潜力分析

通过对玛兴大湾铜矿区地质特征、地球物理及地球化学异常特征、矿床特征及成因等方面的研究分析,认为该矿床的形成与花岗闪长岩脉有关,产于早二叠世二长花岗岩、花岗闪长岩体接触部位,并严格受区内主断裂构造的控制。与Cu、Pb、Zn、Ag、Fe有关的矿化为黄铜矿化、斑铜矿化、孔雀石化、黄铁矿化、闪锌矿化、方铅矿化、磁铁矿化等,矿床主要形成于印支期,根据矿床地质特征及成因分析,总结了铜矿床的矿床类型,认为该矿床为岩浆热液型矿床,具有一定找矿前景。     

北祁连东段西、南华山中酸性侵入岩地球化学特征

北祁连东段西、南华山中酸性侵入岩以花岗岩和花岗闪长岩为主,SiO2质量分数在66.23%~77.13%之间,具有钙碱系列的岩石组合特征和地球化学特征.微量元素Pb、Sr和La明显富集,Cs、Nb、Ti等元素呈现不同程度亏损,显示混合源岩浆的特征.∑REE的质量分数为(100.80~121.03)×10-6,低于世界酸性岩平均值.稀土配分模式呈右倾型,δEu=0.31~0.33,有负Eu异常,与北秦岭加里东期岛弧型花岗岩地球化学特征相似.中酸性岩体总体表现为壳幔混合型岩浆结晶分异的产物,反映北祁连地区中奥陶世末处于具沟-弧-盆体系的俯冲背景.     

甘肃大口子北西金矿床地质特征及矿床成因分析

甘肃大口子北西金矿位于马鬃山镇东南,通过对金矿床成矿地质背景、矿床地质特征的分析,大口子北西金矿床受构造和侵入岩两大因素的控制.华力西中期的闪长岩是成矿的物源条件,华力西晚期的花岗岩使得围岩再次活化,有用组分逐渐汇聚形成含金石英脉;北西向断裂构造控制了矿化带及矿体的分布,断裂构成部分矿体的赋矿空间,华力西中、晚期的闪长岩、二长花岗岩在提供热液和物源的同时,提供了充分的热动力条件.为此,进一步总结了矿床的成因类型及控矿因素,认为该矿床是与石英脉关系密切的石英脉型金矿床.     

甘肃省龙首山铌矿元素地球化学异常特征及找矿方向

通过对青龙山华力西晚期碱性花岗岩矿物组份、岩石化学成份及稀有、稀土元素地球化特征的研究,了解了该岩体中Nb、Ta元素含量的变化特征,明确了青龙山岩体就是含铌的矿源体。经对该区地球化学、地质特征研究及工作所取得的找矿信息,为在龙首山寻找铌矿体,提供了地球化学找矿标志。     

甘肃北山地区花岗闪长岩LA-ICP-MS锆石U-Pb年龄及地球化学特征研究

为了研究甘肃北山地区北山幅晚古生代岩浆岩的年代学特征和地球化学特征,利用Agilent7500 a ICP-MS的方法对研究区的花岗闪长岩进行全岩地球化学分析。结果表明:(1)岩石中Na_2O/K_2O1,里特曼指数介于2.45～2.86,铝饱和指数A/CNK为1.48,总体显示过铝质、高钾钙碱质花岗岩类;(2)富集大离子亲石元素,如Rb,Ba和Sr,损失高场强元素如Ta,Ti和Hf;(3)δEu值为0.55～0.61,平均值为0.58,呈现负Eu异常,有一定的亏损,整体属于轻稀土富集类型。通过LA-ICP-MS方法对研究区的花岗闪长岩进行锆石~(206)Pb/~(238)U年龄测试,锆石~(206)Pb/~(238)U加权平均年龄为(400.1±2.3)Ma(MSWD=0.96),代表了花岗闪长岩的结晶年龄,即该期花岗闪长岩形成的地质时期为早泥盆世。     

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.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that