ORGANIC INCLUSIONS AND THEIR RELATIONS WITH OILS AND GASES

Based on some typical examples, this paper systematically reviews the formation mechanism, geological implications and methodology of organic inclusions as well as their relations with oils and gases.Organic inclusions present a direct mark of primary and secondary migration of oils and gases. The authors put forward the methods and results of investigation and recognition of organic inclusions in this paper. In our research work, the following instruments and techniques were mainly used: polarizing microscope, fluorescent microscope, micro-heating-cooling stage and component analysis. By means of polarizing microscope, the characteristics of organic inclusions, such as their shape, size, distribution, colour and refrigeration, can be known, and furthermore we can divide organic inclusions into two classes. A fluorescent microscope can be used to make ultraviolet scanning on a single inclusion, measure its wavelength and draw a fluorescence spectrum. Heating and cooling experiments show that the measurement of homogenization temperatures is complex and the homogenization temperatures of organic inclusions are 10-20℃lower than those of inorganic salt solution inclusions for the same period. In the cooling process, organic inclusions hardly freeze and such phenomena as deformation of organic inclusions and pulsation stopping of gaseous bubbles can be observed. In component analysis, we can realize the proportion of gas components in each soluble organic constituent in the total extract.In gas and oil exploration, a knowledge of organic inclusions is vital to expanding the application of organic geochemical indices, understanding the geological time and direction of oil and gas migration, confirming the formation stages of oil and gas pools, ascertaining the properties, origin and evolution stages of oil-field waters, and directly guiding the exploration of oil and gas pools.     

我国混合岩化后改造型金矿床的地球化学及其成因讨论

本文论述了一种新的重要层控金矿类型——产于我国华北地台太古界中的混合岩化后改造型金矿床的地质、矿物及地球化学特征。利用地质观察、稳定及放射性同位素组成、包裹体成分及微量元素等综合方法证明成矿物质及矿液主要来自金的矿源层,矿床为海西及燕山期构造-热液的改造作用产物。     

气液包裹体中氢稳定同位素-气体-盐类的连续测定

本文提出了一种分析毫克量包裹体群的成分分析方法。文中拟定了一套在隋性气流下加热爆破、分级冷凝提取水和气体并与气相色谱仪连用的装置;利用电渗析技术直接提取包裹体爆破残留的盐类。该法设备简单,并避免了以往方法中的若干弊病,而且达到了在同一称样中连续测定包裹体中氢稳定同位素、气体和盐类。 在建立方法的同时,并首次测定了若干典型矿床中的包裹体成分。     

多因子概率综合长期预测模型

对危害农作物生长的病虫害进行预测预报，其预报一般分短期、中期、长期、补充和警报五种．发布５日以外，１０日以内的病虫预报称为短期预报．发布１０日以外，一个月以内的病虫预报称为中期预报．发布一个月以外病虫发生趋势的预报（包括年预报）称为长期预报．本文提出一个年预报的模型．它是在笔者从事三年多的病虫预报实践中组建出来的．利用这个模型，对安徽省蒙城县小麦粘虫一代工龄幼虫的发生密度预测获得成功，历史准确率达９２． ８６％．对该县８８年幼虫密度也给出了预报．     

GEOCHEMISTRY AND GENESIS OF POSTMIGMATIZATION-REFORMED GOLD DEPOSITS IN CHINA

This paper deals with the geological, minoralogieal and geoehemical characteristies of anew type of strata-bound gold deposits of postmigmatization-reformed typo occurring in theArchean metamorphic rocks of North China Platform. The integrated results of geologic stud-ics, stable and radioactive isotopic compositions, constituents in minerals inclusions and traceelement data provide evidence to show that ore-forming materials and ore-fluids are mainlyfrom Archean gold source beds, and ore bodies are the products of tectonic-hydrothermal re-forming process at the Hercynian and the Yenshanian times. By a comparison of the natureof this type to the gold deposits in Archean greenstone belts abroad, it is suggested that theyare different in genesis. Postmigmatization-reformed gold deposits are formed under specialconditions. They are mainly developed in later activation zones of platform along the westcoast of ttie Pacific Ocean. This paper presents a model for the formation of this type ofgold deposits.     

CONTINUOUS DETERMINATION OF STABLE ISOTOPES OF HYDROGEN——GASES AND SALTS IN FLUID INCLUSIONS

In this paper, a newly developcd method is deseribed for the analysis of inclusion populations in the milligrarr, range.The authors have designed a series of devices by which the heating decrepitation of fluid inclusions in the inert gas flow. the grading refrigeration for extracting water and gases can be realized, and which also can be used in combination with gas chromatograph, Making use of elcctrodialysis technique can directly extract the remaining saltsin the decrepitatod inclusions. The equipment is simple. It not only avoids drawbacks of the conventional methods, but also facilitates the continuons determination of stable isotopes of hydrogen, gases and salts on the same sample.With the newly developed method, inclusion compositions for samples collected from various types of ore deposits in China have been first determined, and this provides fundamental grounds for expounding the origin of mineral deposits.     

有机包裹体及其与油气的关系

本文结合我国实例,较系统地论述了有机包裹体的形成机制及地质意义,研究方法以及与油气的关系。有机包裹体是烃类原生运移及次生运移聚集与演化的直接标志。作者介绍了利用偏光显微镜、荧光显微镜、显微冷热台、成分分析等手段,研究及识别有机包裹体的方法及结果。