Evidence of fluid inclusion for thermal fluid-bearing hydrocarbon movements in Qiongdongnan Basin, South China Sea   总被引：5，自引：0，他引：5  

Honghan Chen  Qiming Zhang  Jixi Shi 《中国科学D辑(英文版)》1997,40(6):648-655

Diagenetic research and inclusion observance indicate that there are seven types of inlcusion in the reservoirs in the Qiongdongnan Basin. Based on the fluorescence color, ratio of gas/liquid, formation temperature, salinity and organic component of fluid inclusions, three events of thermal fluid movement were found, and only the second and third events are relative to hydrocarbon migration and accumulation with the temperatures of 140–150°C and 170–190°C., respectively.The mechanism of gas migration in aqueous phase suggests that the discharging site of thermal fluid is the favourable location for natural gas accumulation. Project supported by the Natlonal Natural Science Foundation of China.  相似文献   

天然热释光测量方法在地质找矿中的应用     

蔡志安 《华东地质学院学报》1988,(3)

天然热释光测量方法是近几年发展起来的寻找隐伏铀矿体的方法。同时也是一种新的地质研究手段。经多种类型铀矿床的试验结果表明,该方法能有效地发现埋深几十米至二百多米深的盲矿体。此外,还可划分复式岩体不同侵入期和确定其侵入时代;区分产铀岩体与非产铀岩体;划分硅化带中各期石英岩的先后活动序次,进而确定与矿化有关的断裂带及各种热液铀矿脉的成矿时代。  相似文献   

Tropospheric chemical composition measurements in Brazil during the dry season   总被引：3，自引：0，他引：3  

P. J. Crutzen  A. C. Delany  J. Greenberg  P. Haagenson  L. Heidt  R. Lueb  W. Pollock  W. Seiler  A. Wartburg  P. Zimmerman 《Journal of Atmospheric Chemistry》1985,2(3):233-256

Field measurement programs in Brazil during the dry seasons in August and September 1979 and 1980 have demonstrated the large importance of the continental tropics in global air chemistry. Many important trace gases are produced in large amounts over the continents. During the dry season, much biomass burning takes place, especially in the cerrado regions, leading to a substantial emission of air pollutants, such as CO, NO _x , N₂O, CH₄ and other hydrocarbons. Ozone concentrations are enhanced due to photochemical reactions. The large biogenic organic emissions from tropical forests play an important role in the photochemistry of the atmosphere and explain why CO is present in such high concentrations in the boundary layer of the tropical forest. Carbon monoxide production may represent more than 3% of the net primary productivity of the tropical forests. Ozone concentrations in the boundary layer of the tropical forests indicate strong removal processes. Due to atmospheric supply of NO _x by lightning, there is probably a large production of O₃ in the free troposphere over the Amazon tropical forests. This is transported to the marine-free troposphere and to the forest boundary layer.  相似文献   

An isotopic study of hydrocarbon generation processes     

J.W. Smith  D. Rigby  K.W. Gould  G. Hart  A.J. Hargraves 《Organic Geochemistry》1985,8(5):341-347

The sources of reservoired liquid hydrocarbons in Australia differ substantially from their Northern Hemisphere counterparts. Not only are Australian source rocks largely of terrigenous origin but the concepts accepted as defining the hydrocarbon potential of source rocks have recently been challenged. Although isotopic measurements on Australian source rocks and liquid hydrocarbon products closely parallel those published from elsewhere, new interpretations of these data have been made, particularly with regard to D/H ratios in coals. As interesting as such results may be, the most important findings relate to the origins and histories of methane, the higher gaseous hydrocarbons and carbon dioxide, and the interpretation of these data in terms of hydrocarbon genesis. Simple Northern Hemisphere concepts which characterize gases as being biogenic, oil-associated, etc., on the bases of their isotopic and chemical compositions are clearly not applicable to the Australian scene. Indeed justification of such precise classifications in the Northern Hemisphere on the available evidence is also questioned.Isotopic and compositional data from gases from the Cooper, Bowen, Sydney and Gippsland Basins and from the North West Shelf (Australia) are reviewed, and assessed in terms of generation pathways.  相似文献   

概率成像方法对地下球体定位的应用研究     

许令周  关继腾  房文静 《煤田地质与勘探》2004,32(2):54-56

概率成像方法是一种新颖的成像方法。它是利用测量的地面电场函数与电场扫描函数进行归一化的互相关运算，从而对地下电荷进行定位。本文对电法勘探中，地下球体进行了概率成像研究，给出了理论模型和成像结果，从而也证明概率成像方法确实是一种行之有效、计算简便的方法。  相似文献   

影响云南省滑坡泥石流活动的几个自然因素   总被引：15，自引：0，他引：15  

张红兵  金德山 《水文地质工程地质》2004,31(5):38-41

根据1989～2002年云南省滑坡、泥石流调查资料，在单因素分析的基础上，确定地形、岩土体类型、降雨、地震、活动断裂、气候带和植被覆盖率共7个因素是云南省影响滑坡泥石流的主要自然因素。通过R-型因子分析、逐步回归分析和灰色关联度分析，得出对滑坡影响程度由大到小的因子排序是：海拔和高差、地形坡度、地震、活动断裂、岩组、降雨量；对泥石流影响程度由大到小的因子排序是：活动断裂、海拔和高差、岩组、降雨量、地震。  相似文献   

GIS在天然矿泉水资源信息管理中的应用研究   总被引：1，自引：0，他引：1  

卢文喜  李娟  滕继奎  于明宽 《吉林大学学报(地球科学版)》2004,(Z1)

通过开发GIS的通用功能与运用VB编程完成的特殊功能的镶嵌集成,研制出适合用户需求的、整体功能强大的吉林省天然矿泉水资源管理信息系统。该系统不仅实现了含有矿泉分布的电子地图的控制管理,而且还实现了对于矿泉水属性信息单条件或多条件下的精确查询和模糊查询,以及查询结果的任意选项的打印输出。此外,本系统还通过多个软件的联合运用,实现了丰富多彩的多媒体功能。  相似文献   

内蒙古东胜地区土壤天然热释光测量的影响因素研究   总被引：6，自引：0，他引：6  

邓居智  刘庆成 《物探与化探》2004,28(5):402-404

土壤天然热释光方法是通过测量在地表一定深度采集的土壤样的热释光强度进行找矿的方法技术,通过大量的实验研究,总结出了内蒙东胜地区土壤样热释光测量的最佳测试条件,给该地区的土壤样热释光测量测试条件的选择提供了参考。  相似文献   

天山北麓地下水与自然植被的空间变异及其分形特征   总被引：8，自引：0，他引：8  

苏里坦  宋郁东  张展羽 《山地学报》2005,23(1):14-20

对面积约670km^2的具有干旱气候特征的新疆三工河流域地下水埋深和自然植被盖度进行取样检测，应用地质统计学方法对取得数据进行半方差函数分析，计算均值、方差、标准差、变异系数等传统统计特征值，指出用该方法表示地下水埋深和自然植被盖度引起的困惑。在此基础上，将分形理论与地质统计学原理相结合，计算了三工河流域地下水埋深和自然植被盖度的分形维数，分别为1．3154、1．3677；而它们的变异系数分别为0．．537、0．368。该地区地下水埋深和自然植被盖度在空间上存在显著的变异性，而且它们具有相似的变异特征，即随着地下水埋深的递增(或递减)，自然植被盖度有所减少(或增加)，说明干旱区自然植被盖度对地下水埋深有很大的依赖性。这暗示着在干旱地区影响自然植被盖度的众多因素中最具有决定性的因素是地下水埋深。  相似文献   

Analysis of Multi-Component Natural Remanent Magnetization Based on the Thermal Demagnetisation Spectrum     

Man  Otakar 《Studia Geophysica et Geodaetica》2003,47(2):359-370

Natural remanent magnetization as a differentiable vector function of temperature is estimated from thermal demagnetization data. Its first derivative is crucial to the interpretation, since the local maxima of its absolute value reveal the temperature intervals where the magnetization is changing most rapidly, but the direction of a partial thermoremanent magnetization may be relatively stable.  相似文献