重要的是机制的改革 功能的改革

2001年12月22～24日,由中国期刊协会工程设计研究会和中国勘察设计杂志社主办的勘察设计单位改企建制交流研讨(暨第八届通讯员工作)会在成都召开。来自全国各地设计单位的近200名代表参加了本次会议。会议由中国勘察设计杂志社社长、总编辑邱雅陆主持。会上,国家计委宏观经济研究院科研管理部银温泉副主任,国家经贸委中小企业司王海林处长,建设部政策法规司体改办贾四海同志,建设部原办公厅副主任、期刊协会工程设计研究会郝圣锟会长,四川省勘察设计协会蒋道楠副秘书长等有关领导作了发言,国电华北电力工程有限公司徐美珍主任和四川省电力设计院朱白桦院长分别就本院的改制情况作了专题报告。会议期间,代表们针对当前勘察设计单位改企建制工作中各方所关注的一些具体问题进行了探讨与交流。三天的会议求真务实,受到与会代表的好评。现选登本次研讨会上的几扁材料,供正在改企建制中的勘察设计单位借鉴参考。     

日本产的锰的二氧化物矿物的研究现状和存在的问题

本文对日本天然产出的十七种锰的二氧化物矿物.锰钾矿(隐钾锰矿)(石金石—ishiganeite),锰钡矿(钡硬锰矿),锰钠矿(隐钠锰矿),锰铅矿(铅硬锰矿),软锰矿,恩苏塔矿(横须贺石),拉锰矿,(兰姆斯德矿),钠水锰矿(比艾山矿),钙硬锰矿,低钙锰矿(塔锰矿,高根矿),钙锰矿(钡镁锰矿),锂硬锰矿,硬锰矿,黑锌锰矿,水锌锰矿,黑银锰矿和非晶质锰的二氧化物矿物,从描述矿物学的观点出发,结合陆地产出的锰的二氧化物与锰结核的成分之间的关系。进行了简要的论述。     

河网化的分区及渠道的布置原则的探讨

根据本区的地形、水文,地质及水文地质特点,按河网化的需要,概可划分为以下几区: 工 区 本区范围位于调查区之南部,标高一般在200—800米之间。地形崎岖,割切强烈,冲沟甚为发育,割切深度一般为10一30M,冲沟长度为500—1000米,长者可达3000—5000M。坡角为20—70°。这些沟谷相互啣接,构成间歇河流。因岩性分布不均,风化强度不一,故在河流间常形成一些袋状地形,如管帅,后泥牛等皆是。这些冲沟与河流构成北部各大河     

罗布莎矿的发现及铁的硅化物的晶体化学

0 引言 西藏罗布莎铬铁矿矿物学研究首先是由1981年在罗布莎和东巧两个地幔橄榄岩中发现了金刚石而引发的.1996～2004年,在地矿部地调局和加拿大NSERC资助下开展了"西藏超高压矿物群"的课题研究.     

基于MapObjects的数据组织方式改进的研究的探讨

分析了ESRI的组件式GIS产品MapObjects组织和管理空间数据的方法，对其在多图层，多专题，分布式存储的空间数据的管理中所遇到的问题和不足进行了探讨，提出了一种解决思路。同时建立了一种改进的模型并给出了相应的算法，在实际的应用中取得了较好的效果。     

倾斜的隔水层上潜水运动的计算的新方法

在倾斜的平面状的隔水层上的均质的土中流动着的潜水或不承压水,它的流量的计算方法有多种多样。这反映了这个命题,在生产实践上,具有相当大的意义。例如计算水库的渗漏时,如果库岸的地层是倾斜的,那末就需要运用这些方法。     

基于Web的程序设计课程的虚拟实验的实现

讨论在网络远程教育中用JavaApplet来模拟C语言程序的运行，对于给定的程序，用Applet来跟踪程序执行的各个步骤，观察变量的值的变化，显示程序的输出结果，学习者可以给出程序的输入值，观察对于不同输入值而导致的程序执行的流程，变量值和输出的变化，通过在网页中嵌入这种Applet，学习者可以像使用一个调试器一样观察程序的执行过程，在一定程度上实现基于Web的程序设计课程的实验。     

我的理想我的梦

公元二零一三年的春天与以往不同,一个名词“中国梦”飞速走红！ 它旋即进入了中国高层的思维和决策也迅速飞进了每个中国人的脑海与心中！     

俄罗斯联邦的铀矿区的铀矿床

俄罗斯联邦的铀勘查始于１９４４年。从１９４６年发现首批铀矿床之后，直到８０年代早期探明奥涅加远景区，已确定１５个含铀区或矿区（含１００多个铀矿床），在俄罗斯欧洲境内有５个，亚洲境内１０个。举例说明了俄现有的已知常规资源ＲＡＲ＋ＥＡＲ－Ⅰ和未知常规资源ＥＡＲ－Ⅱ＋ＳＲ。１９９８年俄罗斯生产了１０８６５３ｔＵ，跃居世界第五大产铀国，截止以２０００年，“濒额尔古纳联合体”共生产了１０００００多吨铀，每年     

国土的光荣 广西的骄傲

广西这片英雄的土地素来豪杰并起、英才辈出,明代有抗倭巾帽瓦氏夫人,晚清有抗法勇士冯子材;近代有东兰革命武装早期领导人韦拔群,抗日名将李宗仁;和平年代有农民的好榜样韦江歌,人民的好检察官陈革。如今,先辈们曾经洒过热血、滴过汗水的神奇土地上又出现一位壮族楷模、八桂骄子,     

玲珑金矿田金的迁移形式及其地球化学意义

本文用地球化学方法研究了玲珑金矿田各类金矿床中金的迁移形式及其化探意义。结果表明:全以AuCl₄^-、AuCl₂^-、Au(HS)₂^-和Au2S(HS)₂^2-等多种络合物形式迁移,在早期高温阶段以AuCl₂^-为主,后期中低温阶段以Au(HS)₂^-为主。这对热释氯和地电化学测量等地球化学找金新方法的研究与应用具有重要意义。     

Transport and Concentration of Gold in Metamorphic—hosted Reworked Gold Deposits,China

Calculations based on the available thermodynamic data of AuCl ₂ ⁻ and Au (HS) ₂ ⁻ indicate that AuCl ₂ ⁻ is responsible for the transport and enrichment of gold during the stage of pre-concentration in the source bed while Au (HS) ₂ ⁻ is the main gold species involved in the formation of gold deposits in response to hydrothermal reworking. Acid chloride solutions witha _Cl ⁻ > 10° and sulfur-rich solutions with a_Σs in excess of 10⁻² are held as important criteria for gold enrichment in the source bed and for the formation of gold deposits by subsequent hydrothermal event, respectively.     

我国金伯利岩含金性试验研究--以辽宁瓦房店50号岩管为例

一般认为原生或伴生金矿床在成因上与中酸性火成岩有关.文章通过我国金伯利岩型金刚石矿床伴生金的试验研究,确定该类型伴生金矿与超基性火成岩有关.金伯利岩中个别样品w(Au)=0.46×10-6,金刚石选矿尾矿及其重选精矿金的质量分数均较高,具有一定的学术研究价值和开发利用前景.     

胶东地区地质体的含金性与金成矿关系

本文以新近的测试分析资料为基础,较系统地论述了胶东金矿集中区地质体的含金性。大量的测试资料表明：变质岩和地层中金的丰度并非很高（ω（Ａｕ）１．９×１０＾－９￣４．５×１０＾－９,而与金矿有关的花岗岩金的量更低（ω（Ａｕ）０．２７×１０＾－９￣１．８３×１０＾－９。地质体的成因、演化与金矿化的相互关系,表现随岩石成分向酸性变化和碱交代程度增加过程,金及相关成矿元素的含量降低;花岗岩形成过程和碱交代作     

胶东蓬家夼金矿床地质与地球化学特征

蓬家夼金矿床是胶东地区新近发现的金矿床之一,矿体赋存在胶莱盆地东北缘层间滑动断层带中、莱阳组砾岩与荆山群地层的构造接触部位,为区内燕山期火山活动前期,在大气水和岩浆水的参与下形成的层间滑动角砾岩型金矿床。同位素研究表明,蓬家夼金矿的硫、碳来源于矿区围岩;部分铅则可能具有地幔成因。包裹体气相成分以H₂O、CO₂为主;液相成分中富Na⁺、Cl^-,贫K⁺、F^-。成矿流体δ¹⁸O_H2O为0.59‰～4.03‰,δD_H2O为-97.95‰～-89.5‰,反映了成矿流体由大气水和岩浆水混合组成的特点。成矿时代在100Ma。     

Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit, Guizhou, China: implications for gold depositional processes

Arsenian pyrite in the Shuiyindong Carlin-type gold deposit in Guizhou, China, is the major host for gold with 300 to 4,000 ppm Au and 0.65 to 14.1 wt.% As. Electron miroprobe data show a negative correlation of As and S in arsenian pyrite, which is consistent with the substitution of As for S in the pyrite structure. The relatively homogeneous distribution of gold in arsenian pyrite and a positive correlation of As and Au, with Au/As ratios below the solubility limit of gold in arsenian pyrite, suggest that invisible gold is likely present as Au¹⁺ in a structurally bound Au complex in arsenian pyrite. Geochemical modeling using the laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis of fluid inclusions for the major ore forming stage shows that the dominant Au species were Au(HS)₂⁻ (77%) and AuHS_(aq)⁰ (23%). Gold-hydroxyl and Gold-chloride complexes were negligible. The ore fluid was undersaturated with respect to native Au, with a saturation index of −3.8. The predominant As species was H₃AsO₃⁰ _(aq). Pyrite in the Shuiyindong deposit shows chemical zonation with rims richer in As and Au than cores, reflecting the chemical evolution of the ore-bearing fluids. The early ore fluids had relatively high activities of As and Au, to deposit unzoned and zoned arsenian pyrite that host most gold in the deposit. The ore fluids then became depleted in Au and As and formed As-poor pyrite overgrowth rims on gold-bearing arsenian pyrite. Arsenopyrite overgrowth aggregates on arsenian pyrite indicate a late fluid with relatively high activity of As. The lack of evidence of boiling and the low iron content of fluid inclusions in quartz, suggest that iron in arsenian pyrite was most likely derived from dissolution of ferroan minerals in the host rocks, with sulfidation of the dissolved iron by H₂S-rich ore fluids being the most important mechanism of gold deposition in the Shuiyindong Carlin-type deposit.     

中国微细浸染型金矿矿质迁移沉淀机制

本文在分析矿源和成矿物化条件基础上,化理论计算和研究,提出中国微细浸染型金矿中金是呈Ａｕ（ＨＳ）２＾－形式存在阀迁移的,矿质沉淀的主要机理为温度下降和因硫化物沉淀而引起的决硫（及还原硫）活度下降,其次为压力的下降和有机质的还原吸附作用。     

Geology, Geochemistry and Genesis of the Hongshijing Gold Deposit in Ruoqiang,Xinjiang

1IntroductionTheHongshijinggolddepositislocatedinthenorthofLuobupouLakeofRuoqiang ,about 30 0kmsouthwestofHamiCity ,Xinjiang .ItwasdiscoveredbytheSixthGeologicalTeamofXinjiangduringgeo chemicalexploration .TheHongshijinggolddeposit,whichoccursinthegold bearingformationcomposedofMiddleandLateCarboniferousvolcanicandpyroclasticrocks ,isabrittle ductileshearzonetypegolddepositcontrolledbyariftbelt.TheHongshijinggolddepositislocatedinthesouthwestoftheHongshi jing -Maotoushanmineralizationb…     

Speciation of gold in hydrosulphide-rich ore-forming fluids: Insights from first-principles molecular dynamics simulations

To shed light on gold speciation in sulfur-containing ore-forming fluids, we perform first principles molecular dynamics (FPMD) simulations to investigate gold-hydrosulphide complexing under representative geological conditions. With this advanced technique, the electronic structures of solutes and solvents are calculated with density functional theory and the thermal motions are sampled with molecular dynamics. The molecular structures, solvated structures and stabilities of possible complexes are characterized in detail and the following insights have been gained. (1) The previously hypothesized species Au(HS)(H₂S)₃ and Au(HS) are found unstable under ore-forming conditions. Au(HS)(H₂S)₃ would dissociate to LAu(HS) (L = H₂S or H₂O) and free H₂S molecules spontaneously. Au(HS) is highly reactive and tends to capture a second ligand to form a double-coordinated complex. (2) In the thin vapor-like phases of low pressures, the stable complexes include Au(HS)(H₂O), Au(HS)(H₂S) and Au(HS)₂⁻ and their relative stability is Au(HS)₂⁻ > Au(HS)(H₂S) > Au(HS)(H₂O). In dense aqueous phases of high pressures, Au(HS)(H₂S) would spontaneously deprotonate to Au(HS)₂⁻ and thus Au(HS)(H₂O) and Au(HS)₂⁻ are the stable forms. All of these complexes can retain to the upper-limit of ore-forming temperatures. (3) The gold ions in the complexes do not favor coordinating more molecules and therefore the solvations happen mainly through H-bonding interactions between the ligands and environmental waters. H-bonds are found in vapor, liquid, and dense supercritical phases, whereas in the thin supercritical phase the hydration is very weak. These results provide quantitative and microscopic basis for understanding the speciation of gold in hydrothermal fluids.     

小秦岭西南段金矿床的地球化学研究

本文简要叙述了金成矿的地质条件和地球化学特征 ,主要阐述了金的来源、迁移和沉淀机制及矿床成因。研究表明 ,金大部分来源于周围变质岩层 ,小部分由燕山期花岗岩和基性岩脉提供 ;成矿介质热液以岩浆期后热液为主 ,还有少量的大气降水的加入 (或变质岩的粒间溶液 ) ;矿化剂如 Cl-,CO2 ,S2 -多数来源于基性岩脉或上地幔汁 ,少数由地层本身提供。金在成矿早阶段几乎都呈 [Au Cl2 ]-形式迁移 ;在成矿中阶段主要呈 [Au(HS) 2 ]-形式迁移 ;在成矿晚阶段大部分呈 [Au2 (HS) 2 S]2 -形式迁移。金主要是由于含金热液在从封闭系统转化为开放系统时降压沸腾而沉淀富集的