多源数据在西藏多龙矿集区找矿实践中的应用

首先利用ASD光谱仪对多龙矿集区蚀变岩石进行波谱测试和分析,并以此为基础利用ASTER数据提取了多龙矿集区的遥感蚀变信息;其次,选用ETM+数据对该区进行了地质解译,最后,把地球化学数据和遥感蚀变信息、遥感地质解译信息进行综合圈定了找矿靶区.通过多源数据综合研究认为:1)遥感蚀变信息整体呈近东西向和南北向分布,与主构造方向一致,且多龙矿集区的形成与断层发育密切相关;2)通过Cu元素地球化学异常和遥感蚀变信息、地质解译信息综合圈定的找矿靶区,经过野外实践验证表明具有良好的找矿效果.因此,以岩矿波谱测试为基础,综合遥感蚀变信息、地质解译信息和地球化学等多源数据的找矿方法具有快速、经济、高效的效果,尤其在西藏这种气候恶劣、生态背景脆弱的地区拥有更为广阔的应用前景.     

辽宁二道沟金矿床矿物地球化学特征

通过对二道沟金矿床矿物学的详细研究和对比,表明该矿床低温热液矿物组合和低温热液蚀变十分发育;与典型的冰长石－绢云母型浅成热液金矿的矿物组合十分相似;其应属于与流纹熔岩及其火山碎屑岩密切相关的浅成热液型金矿床。     

遥感地质解译及矿化蚀变信息提取在矿产资源评价中的应用

选取Landsat7ETM+和ASTER为遥感信息提取的数据源,基于ETM+数据进行信息提取,结合ASTER数据处理结果进行对比验证,对青海省白日其利地区金矿勘查区进行遥感资源评价。通过遥感影像预处理、地质解译标志建立、影像目视解译获取区内岩性与构造解译图、遥感蚀变信息的提取、圈定找矿靶区等步骤,预测了4个成矿远景区,为后续找矿奠定了基础。     

西安里矽卡岩型铁矿成矿预测区的研究

应用遥感蚀变信息提取和遥感解译相结合的方法,对山西省西安里矽卡岩型铁矿有关蚀变形成的特征波谱信息进行提取,综合分析了影像特征和线性构造、环状构造的特点,初步圈定了该地区新的邯邢式矽卡岩型铁矿区域。根据遥感蚀变信息异常、影像地质特征,结合遥感地质解译特征进行了铁矿资源潜力评价,建立了该地区的预测模型,并且通过后期野外地质工作得到了相应的验证。     

新疆南天山某金矿蚀变信息提取研究

以新疆南天山成矿带某金矿区作为研究对象,基于围岩矿化蚀变理论,利用TM数据对矿化区异常蚀变信息进行提取.矿化蚀变信息是遥感找矿的重要标志之一,蚀变信息的提取可以为野外地质找矿提供重要靶区.基于新疆南天山的地质情况和自然条件,选取南天山某金矿区TM影像数据对其进行蚀变信息提取处理,并对矿区铁染和羟基蚀变进行分级.在总结和参考前人蚀变提取的技术方法基础上,对TM数据首先进行几何校正、大气校正、掩膜(去除植被、水体和阴影的干扰)等预处理,而后运用最经典的蚀变提取方法—Crosta主成分分析法,最后用密度分割的方法对矿区进行铁染和羟基蚀变划分,并划分为三个等级.     

遥感技术在提取矿化蚀变信息中的应用

热液成矿作用的重要标志就是围岩蚀变,而围岩蚀变范围往往大于实际矿体范围数倍乃至数十倍。以查干陶乐盖地区为例,利用遥感矿化蚀变信息识别与提取手段,采用"多元数据分析+比值处理+主成分变换+掩膜干扰去除"等方法对遥感数据进行综合处理,对各信息分量进行分析比较。结合影像特征和地学围岩蚀变相关理论,阐述矿化蚀变异常信息提取的方法,对成矿有关的蚀变信息进行提取,为遥感矿化蚀变信息提取积累经验和提供参考,为该类地区成矿远景区及找矿方向提供理论基础。     

铀矿矿化蚀变信息定量提取方法研究

遥感蚀变信息的定量化提取旨在应用遥感图像处理技术和统计学方法,对成矿区域范围内的示矿要素进行增强处理,并以地物光谱特征的统计值为依据,定量化提取与矿化密切相关的蚀变岩层,为快速识别区域成矿远景、直接预测找矿靶区,提供直观的找矿决策依据。通过对铀矿遥感多光谱数据各波段及波段比值进行特征统计分析,提出了铀矿矿化蚀变由含水矿化物、植被指数、综合蚀变因子所影响,确立了定量提取模型。实验结果表明,获取的铀矿蚀变异常对找矿具有一定的参考价值。     

基于ASTER数据的遥感异常信息提取

遥感技术优势的发挥离不开与实际矿床地质背景的结合,该文选取新疆和田上其汗东区为研究区,从遥感数据角度分析解释成矿地质过程中的蚀变现象。利用光谱分辨率较高的ASTER卫星遥感数据,结合现代成矿地质理论及搜集的区域地质资料,通过遥感短波红外波段提取热液活动相关的成矿信息,分析矿化蚀变与地层、构造、岩体、化探异常、航磁异常的关系及致异常因素,结合已知矿点地质环境分析,研究多种矿化蚀变空间分布特征与块状硫化物型矿床成矿过程的关联,优选找矿靶区,提出下一步工作建议。     

尕尔穷铜矿多光谱遥感蚀变矿物分带特征

以西藏阿里地区革吉县尕尔穷铜矿床为例,利用ASTER多光谱遥感数据在矿区及其外围开展矿化蚀变矿物信息的提取。运用主成分分析法获取了Fe~(3+)矿物、高岭土、绢云母、绿泥石4种蚀变矿物的分布信息,同时采用端元波谱法对矿化蚀变信息进行提取。结合以上两种提取方法显示出尕尔穷铜矿区矿化蚀变信息具有分带性:Ⅰ号矿体矿化蚀变分带由外向内可划分为绿泥石→绿泥石+高岭土→高岭土+绢云母+Fe~(3+)矿物;Ⅱ号矿体矿化蚀变分带从外至内依次为绿泥石→高岭土→高岭土+绢云母+Fe~(3+)矿物。遥感蚀变矿物的分带特征与尕尔穷铜矿围岩蚀变分布情况基本一致。     

遥感找矿在新疆阿尔沙特地区的应用

阿尔沙特位于阿勒泰北部地区,是我国著名的有色金属、稀有金属及贵金属成矿区,但由于自然环境和地质条件较差,对地质找矿工作造成一定难度。通过应用遥感技术提取的地质构造信息、蚀变信息、伟晶岩信息等,基于这些遥感数据的分析对该区伟晶岩矿床圈定了8个找矿远景区,并对其中的两个远景区进行了预测,为以后地质找矿提供参考。     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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