| 矿物包体分类问题及其意义（一种新的包体分类方案） |
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| 引用本文：.1982.The classification of mineral inclusions and its significance (A new scheme for the classification of inclusions)[J].Mineral Deposits,1(2):80~91 |
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| The classification of mineral inclusions and its significance (A new scheme for the classification of inclusions) |
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| Abstract:Some well-known foreign inclusion mineralogists have already put forward a number of schemes for classifying mineral inclusions. Of these schemes, some seem rather complicated, some are comparatively simple. But they are mostly alike in essence and have the defect of not touching upon anomalous inclusions, which are actually of great significance. To people's more surprise, the inclusion formed through chemical reaction, a type of primary importance, had almost fully escaped the investigators' notice prior t0 1977 when the author took up the problem. In this paper, a new scheme for classifying inclusions are presented according to their genesis, physical state and chemical composition. It might serve to avoid some mistakes in the study of inclusion mineralogy. First, one can differentiate anomalous inclusions from normal ones in the light of the genesis. The normal inclusions can then be further divided into eight subtypes according to their physical state and chemical composition, and the anomalous inclusions into two subtypes, one from physical reaction and the other chemical reaction. Either of them consists of two groups. Some mechanisms of the formation of anomalous inclusions are elaborated in this paper and great pains have been taken by the author to give a clear definition to both the anomalous inclusion and the normal one. This scheme has the merit of being relatively complete and less complicated. It can be of some help in the determination and distinction of inclusions under the polarization microscope. With this scheme it might be easier to distinguish anomalous inclusions from normal ones. Only normal inclusions can be used as the codes for translating the endogenic ore-forming processes. None of the anomalous inclusions has such function or possesses typomorphic peculiarities of minerals. The following is my classification: I . Normal inclusions, 1. Solid inclusions, (1) Crystalline inclusions-inclusions usually found in intrusive bodies, (2 ) Amorphous (Vitreous) inclusions-inclusions usually found in volcanic rocks and their related ore deposits. 2. Gaseous inclusions-inclusions of high specific volume with double fluid phases, They are usually found in pneumatogenic deposits and can be homogenized into gaseous phase. 3. Liquid inclusions-inclusions of low specific volume with double fluid phases. They are usually found in hydrothermal deposits and can be homogenized into liquid phase. 4. Pure liquid inclusions-monophase liquid inclusions, often seen in sedimentary minerals formed in waters below 50℃. 5. Multiphase inclusions-inclusions with gaseous, liquid and solid phases. 6. High salinity inclusions-gas-liquid inclusions with daughter minerals of salt at atmospheric temperature. 7. CO2 inclusions-inclusions formed below the critical temperature of CO2 and consisting generally of three phases, namely, water, liquid CO2 and gaseous CO2. 8. Organic inclusions-inclusions containing petroleum and/or other organic matters, such as methane, ethane and bitumen. II. Anomalous inclusions, 1. Inclusions formed through physical action. (1) Inclusions formed through natural processes. (2 ) Inclusions formed through artificial processes. 2. Inclusions formed through chemical reaction. (1) Inclusions formed through chemical decomposition. (2) Inclusions from heterogeneous mother solution. |
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