吉林桦甸市夹皮沟本区金矿剥露历史和矿床保存变化——来自磷灰石裂变径迹年代学证据

有关吉林省桦甸市夹皮沟金矿区剥露历史的研究,至今尚不多见,然而成矿后的变化与保存是矿床学研究的一个重要领域,并且矿区剥露历史对于区内矿体保存状况具有重要的指示意义。裂变径迹是研究区域隆升剥露的一种有效手段,能提供剥蚀速率和剥蚀量的定量数据,本文应用裂变径迹技术研究夹皮沟金矿区中生代成矿以来的剥露历史。使用磷灰石裂变径迹年龄数据进行热历史模拟,揭示其演变机理。实验中获得8个了磷灰石裂变径迹测试结果,裂变径迹年龄可分为3组:(128~111Ma、86~64Ma和48~29Ma)。夹皮沟金矿区的热演化历史可分为了3个阶段,分别为:第1阶段160Ma到85±10 Ma;第2阶段85±10 Ma到28±2 Ma;第3阶段28±2 Ma至今,相应的剥露深度为2.90km、0km和1.17km。根据剥露厚度及成矿深度推测,夹皮沟本区中下戏台、立山两矿区金矿床保存状况良好,下部仍有较大探矿潜力。     

基于DWZ和SSH的煤层气地面集输地理信息系统的设计与实现

根据煤层气管理信息化的要求,设计并实现了基于DWZ富客户端框架和SSH三层架构的B/S模式的煤层气地面集输地理信息系统。文中介绍了DWZ和SSH框架的优点,分析了系统的功能模块,并以系统登录为例阐述了DWZ和SSH在系统中的应用。实践表明,该系统提高了煤层气田的工作效率,实现对煤层气田矿井、生产数据、生产设备、报表和用户的信息化、网络化管理。     

利用中国GPS站网对地震波引发的大尺度电离层扰动的观测

地震瑞利波在沿地表传输时衰减很慢,其能量在远离震中的区域仍然能够激发大气和电离层扰动.本文利用中国境内的GPS接收机网络观测电离层总电子含量(total electron content,TEC),分析了 2011年日本地震后在中国区域上空产生的电离层扰动.研究发现,瑞利波的能量从地面经大气耦合传输到电离层高度,导致在中国区域上空电离层出现与瑞利波传播同步的TEC扰动.利用中东部的稠密接收机网络,还揭示了扰动的大尺度二维空间结构:瑞利波经过后产生的TEC扰动呈条带状,在中纬度地区沿西北—东南方向排列,而在低纬度大致为东西方向.条带的转向可能与地磁场作用下的中性-离子耦合过程有关,大气波动导致的等离子扰动倾向于沿磁力线方向(向南)传播,从而形成垂直磁力线方向(东西)的波前结构.这是首次在远离震中的区域使用GPS站网研究地震波耦合电离层扰动的大尺度二维空间结构.     

我国西北地区盐湖中的铀234U/238U比值示踪研究

内蒙古二连盆地、鄂尔多斯盆地典型含铀碳酸型盐湖水、岩两相234U/238U综合分析表明,碳酸型盐湖铀来源于大气降水和潜水对盐湖盆地周围中生代到现代富铀沉积物的溶滤、浸出,具有快速、近源物质来源特点。盐湖卤水和对应沉积物234U/238U值一般为0.8～1.2,湖卤水和潜卤水（晶间卤水）-岩两相中的铀处于沉积平衡状态。早白垩世～上新世含膏盐地层对比研究证实了富铀岩层234U/238U值随铀含量增大而减小,并趋近于1。室内盐湖水蒸发模拟实验发现残余卤水、沉积物234U/238U具有随蒸发程度增大逐渐减小的变化特征。盐湖现代沉积物物相研究发现铀主要以碳酸铀酰和吸附形式赋存在富含有机物和碎屑成分的含盐粘土沉积中,铀在盐类晶体中含量极少,仅存在于封闭水和结晶水中。卤水和沉积物ARu值是盐湖铀源及铀含量水平的指示标志之一。     

Major Breakthroughs in Geological Theory,Key Techniques and Exploration of Tight Oil in China

正In recent years,U.S.tight oil exploration and development have achieved significant progress,with rapidly increasing production,which has significantly changed the U.S.A.energy supply pattern(Fig.1).Compared with the North American marine to marginal marine-continental transitional facies,China’s tight oil(Fig.1)     

Congratulation for Our Deputy Editor-in-Chief Chunmiao Zheng Receiving Two Prestigious International Awards

正Dr.Chunmiao Zheng,a deputy editor-in-chief for Acta Geologica Sinica(English Edition),received the 2013 O.E.Meinzer Award from the Geological Society of America.Dr.Zheng was also awarded the 2013 M.King Hubbert Award by the National Ground Water Association in the United States."It is quite an achievement to receive both of these awards     

黔东南那哥铜铅多金属矿床的矿化时空结构

黔东南那哥铜铅多金属矿床位于扬子陆块与华夏陆块的过渡带上,该区经历了自四堡期以来的多期构造活动,岩浆活动频繁,变形-变质强烈,构造形迹复杂;通过深入剖析矿床地质特征,结合区域地质演化史,从铜铅矿化的时空结构分析入手,系统研究了矿体空间定位规律。研究结果表明,在时间结构上,成矿与重大地质事件关系密切,具有多阶段成矿的特点;在空间结构上,矿体主要受控于尾硐溪断裂,赋存于断裂带走向上的弧形转弯处、断裂面的凹凸变化部位,矿体具膨大狭缩、尖灭再现特点,在空间上具有向W侧伏的趋势。     

Status of China’s Geological Survey and Geological Environments in 2013

正With the approach of the 45th World Earth Day,China’s Ministry of Land and Resources issued the status of the Chinese geological survey and environments on 22nd April 2013.Regional geological survey in 2013 achieved new results—(why was oceanic in twice?)polar and oceanic expedition were fully completed,a national census of geography was begun,and     

赤城县梁家沟铅锌银多金属矿床流体包裹体特征及其意义

文章运用激光拉曼光谱和显微测温等方法,对赤城县梁家沟铅锌银多金属矿床矿石中的石英流体包裹体进行均一温度、盐度的测试分析。结果表明,矿物中的流体包裹体以气液2相为主,气相成分主要是CO2,液相成分主要是H2O和烃类液体;包裹体的均一温度为80.0~160.0℃,盐度w(NaCl)=2%~12%,说明矿床形成条件为低温低盐度,且富含烃类物质。结合矿床地质特征、矿床的构造位置、产出地层和该矿床中矿(岩)石的常量元素、微量元素和稀土元素的数据研究结果,初步厘定梁家沟铅锌银矿床属于密西西比河谷型(MVT)矿床。     

Chinese Bio-oxidation Gold Extraction Technology Reaches International Advanced Level

In Liaoning, Hunan, Guangxi, Guizhou, Gansu, Sichuan, Anhui, Jilin and other provinces in China, there is a wide occurrence of metal quantity over 1000 tons of refractory gold ores, principally because of low gold recoveries and become ＂stay mine＂. Features of refi＇actory gold ores are： gold in micro-particles or a microscopic state that is wrapped in pyrite, presence of arsenopyrite and other sulfide minerals or disseminated in the crystal lattice of sulfide minerals; harmful impurity elements such as arsenic, carbon, mercury, antimony, copper with high content are closely related with the gold, and these elements affect the contact reaction between the gold and solvent extraction, making the recovery of the gold extraction process low. In the past 20 years, overseas countries have developed the application of the roasting oxidation method, hot acid （alkali） oxidation, bacterial oxidation and flash chlorination oxidation technology to solve this problem.Among these, biological oxidation has developed rapidly in the domestic market and gold enterprises abroad because of its low investment in infrastructure, low production costs, less environmental pollution, simple process and easy control, etc.