攀——西地区基性超基性含体岩矿性数学地质研究中的几个问题

攀——西地区基性超基性岩分布很广,岩体总数超过200个,其中部分岩体已经详勘或开采,是钒钛磁铁矿、铜镍(铂)硫化物矿产基地,同时有些超基性岩体有铬矿化现象。为了对其余岩体进行评价以及找寻深部矿体,我们参加了本区钒钛磁铁矿成矿规律与预测研究项目,对岩体的含矿性进行数学地质研究。现把研究成果作简要介绍,并对基性超基性岩含矿性数学地质研究中的几个问题提出一些粗浅的看法,供今后工作时参考。     

北票市头道营子金矿物化探方法的综合应用

为了在北票头道营子地区寻找一套有效的找金方法,首先通过化探及物探测量,圈定出该区土壤地球化学高值金异常区和激电异常区,缩小找矿靶区和发现金异常高值区及矿体,然后采用地表槽探揭露和深部钻探验证等方法和手段,在异常区中发现和圈出具有一定规模和品位的金矿体,初步取得了较好找矿成果。同时该技术路线可为区域地质背景相似的地区找矿工作提供一套系统的工作方法。     

白银矿田外围物化探找矿模型及找矿预测

为了解决白银矿田外围的深部找矿问题和探寻在该类地区寻找隐伏金属矿床的有效方法组合,在甘肃省白银市东南区Ⅰ号铜铅锌金银矿普查区采用地电化学测量法、大功率瞬变电磁法、高精度磁测法来寻找隐伏矿体。结果探取该区存在18处元素地球化学异常,15个TEM异常,可能有火山机构存在;总结出适合白银矿田外围地区的物化探找矿模型2个,并最终圈定了4个深部找矿靶区,同时指出进一步的找矿预测研究应该在2-Ⅲ、10-Ⅰ和10-Ⅱ号靶位开展。     

德昌巴洞金红石矿物的初步研究

金红石矿物不仅是提取钛金属的重要原料,在航空和宇宙科学上,它已被用做具有特殊性能的高温焊接材料。四川省地质局111地质队于1978年初在我省德昌巴洞基性—超基性岩体中发现了原生金红石—钛铁矿矿体后,我们在同年9月曾去该岩体进行野外地质研究并采集样品,其后对该区金红石矿物的物、化性质及产出特征等方面进行了初步     

四川江油马角坝地区飞仙关组磁异常地质因素讨论

为查明四川江油马角坝地区出露的古生界-中生界海相碳酸盐岩和陆相碎屑岩区域磁异常的地质因素,对研究区典型地质剖面进行了地面高精度磁法测量,通过测区岩层物性测试和基于L₀范数约束的磁测数据共轭梯度聚焦反演,获得了研究区多套地层的磁性特征和深部磁性成像结构;研究结果表明地面观测的下三叠统飞仙关组高达近1 000 nT的磁异常,并非完全由其含铁质泥页岩地层所引起,最高可达近5 A/m的磁化强度成像异常揭示深部可能存在侵入的基性岩或超基性岩体。这一岩体可能与发生在扬子西缘的二叠纪末大规模岩浆事件持续活动密切相关,其岩浆活动在川西北的龙门山北段作用时间可能至少持续到了早三叠世的飞仙关期。结合区域重磁异常分布规律,认为这一岩浆事件可能在整个川西北地区并非个例存在。     

阿尔泰地区铜镍矿床综合信息找矿模型及成矿预测

阿尔泰地区存在５条与深大断裂有关的基性、超基性岩带,是铜镍硫化物矿床产出的有利地段,其中喀拉通克铜镍矿是我国大型铜镍矿之一。通过民矿必要条件的深入研究,得出深大断裂及其次级断裂控制了岩体的产出,北北西向断裂叠加北西向断裂控制了矿体的产出;成矿充分条件是基性、超其性岩体,总结了岩体含矿性的评价指标。结合重磁及地化资料,在喀拉通克铜镍矿的成矿模式基础上,建立了区域综合信息找矿模型,进行成矿 定靶区９处     

内蒙古临江找矿研究区玄武岩稀土元素地球化学特征初步研究

通过对内蒙古临江找矿研究区玄武岩稀土元素地球化学特征初步研究显示,区内玄武岩普遍富集稀土,轻、重稀土元素强烈分异,稀土元素特征参数与金含量存在一定的相关关系,铕、铈均无明显异常。区内玄武岩为壳幔物质混合形成,找矿研究区可能存在部分贵金属和稀土元素成矿。     

山东栖霞毕郭地区1∶50 000水系沉积物测量异常特征及找矿预测

为实现栖霞地区金矿找矿突破,在毕郭地区开展1∶50 000水系沉积物测量的基础上,进行Au、Ag等为主的16种元素分析。对元素分布特征、富集离散特征及异常特征进行研究,并进行各元素的R形聚类分析和因子分析。结果表明,研究区内以Au为主的成矿各元素异常强度高,规模大,套合性好的异常,主要分布在与区内主成矿及其次级断裂带。结合区内地质、物探及矿产特征,圈定5处金找矿预测区：笏山金矿的深部及外围A级预测区1处、台前金矿深部B级预测区1处、孙疃-大河崖、三宿夼和大花园地区C级预测区各1处。     

云南省钼地球化学特征及找矿预测研究

钼元素多以低价硫化物形式存在,在强氧化条件下也形成高价态离子或络合物,"分散富存"于中-基性岩、酸性岩或被铁锰强物质、有机质吸附而赋存于黑色岩系、第四系风化物.在高卤环境下比较稳定而易分离、迁移、富集,形成岩浆汽液多金属矿床.云南省钼高背景、异常分布于基性火山岩出露区、杂岩带及黑色岩系、含铁锰风化物分布区.根据地球化学特征、成矿地质地球化学背景及成矿专属性,全省共圈定16个地球化学找矿预测区.     

广西罗城县鱼西铜镍矿矿床地质特征

罗城鱼西铜镍矿区位于桂北台隆九万大山穹褶带,产于基性一超基性岩体内.在分析研究矿床地质概况、构造特征、矿体矿物组合及矿物特征、矿石矿物的结构、构造.指出该矿为岩浆熔离、残浆交代和热液型等矿床类型,找矿标志是纤闪岩体、北西向褶皱、断裂.     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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