寻找铝土矿床中的高密度电阻率应用方法

沉积岩地层中,石炭系中统本溪组在奥陶系古风化面的凹陷地段(溶蚀盆地、溶洼和溶斗)沉积厚度大,利于铝土矿的形成,为铝土矿的赋存场所。文章详细论述了运用高密度电阻率法在某矿区的成功找矿案例,说明此方法在寻找铝土矿上探测岩溶盆地、间接寻找铝土矿有很好的技术效果。     

贵州凯里-黄平地区铝土矿空间分布规律与古岩溶地貌关系的研究

通过对凯里-黄平铝土矿区中王家寨矿区、苦李井矿区、铁厂沟矿区和渔洞矿区的铝土矿空间分布规律及与古岩溶地貌关系的研究,得出研究区铝土矿床的空间分布规律、矿体的空间形态、规模、品位及厚度等均受到古岩溶作用控制。古岩溶地貌为溶斗区域的铝土矿体厚度变化大,延展较小;但其矿石质量较好,品位较高;而古岩溶地貌为岩溶洼地区域的铝土矿体厚度变化较小,呈似层状产出;但矿体厚度小,矿石质量相对低一些;同时铝土矿体厚度、品位与含铝岩系厚度呈明显正相关,这也与古岩溶地貌有着密切的关系。     

广西溶洼系统结构特征及其对岩溶内涝的影响

阐述广西溶洼系统的结构特征，认为溶洼系统所处的位置高度、地层岩性、岩溶发育程度及地下水埋藏深度，特别是落水洞、坚井、天窗、漏斗、地下河道发育的形态和大小是形成内涝的内在因素。不合理地平整土地、固体废弃物随意倾倒、修建大型水库、上游洼地不合理的隧洞排洪、破坏森林植被等人类活动也会引发溶洼系统结构变化，导致溶洼系统的输水能力变差，加剧岩溶内涝发生，加重内涝灾害程度。     

AMT技术在黔中水田坝地区铝土矿勘查中的应用

贵州铝土矿露头及浅覆盖区勘查工作已近乎完成,目前铝土矿多为隐伏矿,本次黔中水田坝地区铝土矿勘查主要寻找中深部隐伏矿体。黔中水田坝地区铝土矿位于黔中铝土矿之南东,赋矿层位为石炭系九架炉组(C_1jj),其底板为寒武系娄山关组地层(∈_(2-3)ls),二者为假整合接触。铝土矿的品位、厚度严格受到不整合面上岩溶洼地、岩溶漏斗的影响,平面上变化较大。根据矿区含铝岩系与顶底板的物性差异,本次在黔中水田坝地区铝土矿的勘查中,选用音频大的电磁测深法(AMT)进行勘查,划分含铝岩系与顶底板的界线及含铝岩系厚度,结合地质测量及探矿工程资料综合分析,圈出含矿有利部位,进而钻探验证,取得了较好的效果。     

云南鹤庆白水塘铝土矿地质特征与成因分析

白水塘地区铝土矿赋存于上三叠统中窝组下部(T3z1-2),其分布在构造条件相对稳定的洼地,具一定时期的沉积间断.沉积相为局限海湾一泻湖一沼泽相.下伏地层为中三叠统北衙组灰岩.矿床成矿条件表明,该区具有一定的找矿前景.区内构造简单,古岩溶洼地对成矿有利.     

不同填洼结果下TOPMODEL在流域径流模拟中的应用比较研究

湿度指数是TOPMODEL的重要输入。从数字高程模型（DEM）中提取湿度指数之前需对DEM进行洼地处理。大多数填洼方法在对洼地处理后一般存在平坦区，在确定性最陡坡度法下平坦区栅格水流将很难进行流量分配，此类填洼本文称之为不完全填洼。为了使整个流域的水量在流域出口点达到平衡，本文提出了一种完全填洼方法，讨论了完全填洼和不完全填洼下集水面积、坡度、湿度指数的空间分布，比较了二种填洼结果下TOPMODEL在牧马河流域径流模拟中的应用。模拟结果表明，完全填洼和不完全填洼下TOPMODEL模拟的的径流过程区别不大。     

贵州喀斯特岩溶洼地内岩堆体成因分析及稳定性分析

以典型喀斯特洼地——贵州省黔南布依族苗族自治州平塘县克度镇六水村大型洼地为分析对象,在查明喀斯特发育特征和空间分布规律,分别从岩溶发育条件条件分析得出了岩溶洼地内岩堆体形成演化规律.     

广西大化七百弄高峰丛深洼地的特征及形成演化过程

大化七百弄高峰丛深洼地以峰丛密度大、洼地深和体积大为主要特征,洼地及谷地的分布受断裂构造的控制十分明显,具有极高的科学研究和旅游观赏价值。大化七百弄高峰丛深洼地是在水文气候、岩溶岩组成和地质构造等多种地质因素作用下,经历了白垩纪的岩溶初始阶段,由古近纪古新世至第四纪的发展演化逐发新世末期的发展演化逐步形成。     

平果岩溶堆积铝土矿空间分布特征及成因探讨——以教美矿区为例

以平果堆积铝土矿教美矿区为例,对矿区堆积铝土矿的空间分布特征及成因进行了探析,提出了岩溶堆积铝土矿的堆积序列和分布规律。     

中南工业大学地洼学说成矿学研究所在广西贵县发现三水型铝土矿

我校地洼学说成矿学研究所科技人员运用地洼成矿理论,今年五月在广西贵县发现大规模三水型铝土矿,使该型矿产的找矿工作取得突破性进展. 矿床分布于岩溶平原之中,成矿时代为第四纪.矿层由砾状矿石和疏松红土组成,厚度1.1—3.5m,平均2.2m.含矿率545—1132kg/m~3,平均940kg/m~3.据部分探矿工程刻槽取样分析结果,砾状砾石Al_2O_3含量22.64—35.24％,平均28.34％;SiO_2 5.9—10.33％,平     

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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