永平水泄铜钴矿控矿因素

水泄铜钴矿区地质条件较为复杂,控矿因素较多,通过分析认为主要受断层及岩性控制,地层初始富集,构造及区域变质作用提供通道及热源。水的循环、溶解作用形成热卤水成矿。     

经济合作区域的选择方法研究——以云南在泛珠三角中选择重点合作省区为例

从成功的区域合作经验看,区域间的差异性和联系性是选择经济合作区域必须考虑的两大核心因素.通过多种指标对两大因素进行测度和分析,最终正确选择合作区域.泛珠三角合作为云南经济发展提供难得机遇,云南如何立足自身优势,正确选择重点合作省区,关系到合作的最终成效.从云南与泛珠三角其他省区间的经济发展差异、产业结构差异、优劣势条件、综合距离系数以及历史联系等角度分析,提出了云南应把广东、广西、四川、香港作为重点合作省区.     

Influence of the Kunlun Mountain Ms8.1 Earthquake on Horizontal Crustal Deformation in the Sichuan and Yunnan Area

In order to track the space-time variation of regional strain field holistically(in a large scale) and to describe the regional movement field more objectively,the paper uses a nonlinear continuous strain model focused on extracting medium-low frequency strain information on the basis of a region with no rotation.According to the repeated measurements(1999～2001～2004) from GPS monitoring stations in the Sichuan and Yunnan area obtained by the Project of "China Crust Movement Measuring Network",and with the movement of 1999～2001(stage deformation background) as the basic reference,we separated the main influencing factors of the Kunlun Mountain M-S8.1 earthquake in 2001 from the data of 2001 and 2004,and the results indicate:(1) the Kunlun Mountain M-S8.1 earthquake has a discriminating effect on the Sichuan and Yunnan area,moreover,the deformation mode and background had not only certain similitude but also some diversity;(2) The movement field before the earthquake was very ordinal,while after the earthquake,order and disorder existed simultaneously in the displacement field;The displacement quantities of GPS monitoring stations were generally several millimeters;(3) The principal strain field before earthquake was basically tensile in an approximate EW direction and compressive in the SN direction,and tension was predominant.After the earthquake,the principal strain field in the Sichuan area was compressive in the EW direction and tensile in the SN direction,and the compression was predominant.In the Yunnan area,it was tensional in the NE direction and compressive in the NW direction,and tension was predominant;(4) The surficial strain before the earthquake was dominated by superficial expansion,the contractive area being located basically in the east boundary of Sichuan and Yunnan block and its neighborhood.After the earthquake,the Sichuan area was surface contractive(the further north,the greater it was),and south of it was an area of superficial expansion.Generally speaking,the Kunlun Mountain M-S8.1 earthquake played an active role in the accumulation of energy in the Sichuan and Yunnan area.Special attention shall be focused on the segment of Xichang-Dongchuan and its neighborhood.     

Corresponding Relation Between the Space-time Evolution of Seismic Apparent Strain and the Region of Strong Earthquakes in Yunnan

On the basis of our predecessors' research,we study the distribution and the space-time evolution characteristics of the seismic apparent strain field in Yunnan since the 1970's using the seismic data of Yunnan and its surrounding areas.The result shows that there is a rather strong corresponding relationship between the anomaly region of seismic apparent strain and strong earthquakes.In the nine earthquakes studied,anomaly areas of seismic apparent strain had appeared before eight earthquakes,including five occurring in the anomaly region and three on the edge.Finally,the investigative result is demonstrated primarily.     

地震子波旁瓣对薄砂体识别的影响

我们研究中国西部某盆地一些气田时,发现地震子波旁瓣在很大程度上影响着薄砂体的识别和解释。该区目的层段H段地层中,辫状河流相薄砂岩储层与湖相泥岩成互层。在地震资料上,来自H段地层顶面的强波谷总跟随一个弱波峰(源于子波旁瓣),此弱波峰与薄砂体顶面反射波峰相互叠合,掩盖了砂体反射,造成了薄砂体识别和解释的困难。为此,我们设计了一套正演模型,利用不同频率的零相位雷克子波合成人工地震剖面,来研究砂体位置、频率与地震子波旁瓣效应的关系,以及振幅类属性与薄砂体关系。提出处于高位置的砂体反射形态清晰,易于识别解释;认为通过对比不同带通滤波处理后的地震资料,可很好辨别旁瓣效应和砂体反射;同时发现振幅类属性可作为薄砂体识别表征参数,可有效合理地描述砂体分布范围和特征。     

MM5中尺度非静力模式对云南省降水预报检验

根据MM5／V3中尺度非静力模式数值预报结果，检验了该模式在云南2001年汛期（6－10月）的降水预报效果。结果表明，MM5模式降水预报对云南大部分地区的小雨有较高的TS评分，对于全省性大雨过程，MM5模式24小时降水预报的TS评分高于同期预报员的主观预报，但对暴雨及以上量级的降水预报，模式结果不太理想。     

遥感技术在云南中甸地区煤炭资源调查中的应用

以卫星遥感技术为主要手段,通过遥感地质解译,结合适量的野外调查,综合常规地质资料分析,认为云南中甸地区的含煤目的层为新第三系上新统和第四系更新统。并对该区新生代盆地的形成机制及煤层聚集、赋存规律进行了总结,圈定了5个含煤远景区,为该区进一步进行煤炭资源勘探提供了靶区和基础资料,对解决滇西北严重缺煤的现状有一定的实际意义。     

云南墨江金厂金矿床成岩成矿年龄研究

墨江金厂是一个类型比较特殊的大型金矿床，与超基性蛇绿岩具有密切成因联系。其成岩成矿时代问题尚有不同认识，通过同位素年龄资料对比，认为金矿成矿母岩－蛇绿岩体是加里东晚期的产物；通过^40Ar-^39Ar法和其他方法的年龄测定以及野外对各类金矿化石英脉的对比研究，认为从海西至喜马拉雅期均有不同程度的金矿化。该矿床为多期次、多阶段叠加富集成矿。     

滇东北发现新类型具工业价值铜矿床

近半年来 ,973项目组在滇东北鲁甸、威宁、宣威一带 ,通过 3次野外工作发现了氧化铜＿自然铜工业矿体和广泛的矿化点受二叠纪峨眉山玄武岩组最上部层位古火山口环境和上覆宣威组碳泥质层控制 ,产于火山角砾岩、凝灰岩、含碳硅质岩、硅质沥青岩和气孔状熔岩中。矿石矿物主要为黑铜矿、自然铜、硅孔雀石、辉铜矿。经野外调查和实地追索取样分析 ,已确定并控制了两个具工业勘查前景的矿段。第一矿段位于鲁甸县的小寨向斜构造北西翼的中段。控制矿体长 15 0 0ｍ ,厚 4～ 2 0ｍ ,矿石Ｃｕ平均品位 1.5 %。第二矿段位于小寨向斜构造南东翼的南端。…     

滇西北独龙江花岗岩及岩浆作用特征

滇西北独龙江地区的燕山期花岗岩可划分为6个单元，归并为早，晚2个序列。早期－龙岗不若序列由巴坡，东哨启等2个单元组成，生成于晚侏罗世－早白垩世，为壳幔混源岩浆形成，属火山弧花岗岩，是班公湖－东巧－怒江结合带俯冲消减的产物，晚期－独龙江序列由机独，其期，麻毕当，斯拉罗等4个单元组成，生成于晚白晋世，为壳源花岗岩，形成于同碰撞环境。是班公湖－东巧－怒江结合带碰撞造山的物质记录。