| 应用岩石化学方法恢复变质岩原岩类型的一些问题 |
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| 引用本文： | 贺高品.应用岩石化学方法恢复变质岩原岩类型的一些问题[J].岩石矿物学杂志,1984,3(3):224-220. |
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| 作者姓名： | 贺高品 |
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| 作者单位： | 长春地质学院 |
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| 摘 要： | 在变质岩的研究工作中,恢复各种变质岩的原岩性质是研究变质岩系的原岩建造和形成环境、进行地层划分和寻找有关矿床的基础。在国内外研究变质岩原岩性质的工作中,应用岩石化学的方法十分普遍,特别是对那些产状特征不明显和原岩组构已经消失的深变质岩石尤为重要。由于编制中国变
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Some Problems on Using Petrochemistry Methods in Restoring the Metamorphic Rocks to their Original Natures |
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| Abstract: | In compiling the map of China metamorphic petrology, the author has re-
viewed more than thirty ordinary petrochemistry methods in regard to their
character and application, and he has noticed there are two erroneous tenden-
cies in the application of these methods both in our country and abroad, one
of them only used one or two petrochemistry methods in restoring the original
rocks, the other throwed doubt on the effectiveness of all petrochemistry met-
hods. The author analysed the causes which produced above two erroneous
tendencies.
Two principles of petrochemistry methods are discussed in this paper and
considered essentially to be true. The first is that the regional metamorphism
is equichemical, i. e. there is no chemical change in the rocks in the processes
of metamorphism, except their HBO and CO2 content. The second is that the
chemical composition should be different between the various genetic types
of original rocks either in their major elements or minor elements, and even
in the relationshipes of them.
For the correct use of the petrochemistry methods the author puts for-
ward four items of suggestion, in which should be especially emphasized is that
oue should pay attention to the chemical peculiarities of various volcanic-sedi-
mentary rock types and their distributive characters in various petrochemis-
try diagrams. In addition, It is necessary to have an intimate understanding of
selected methods including their theoretical foundation,applicability, advantages
and their defects. |
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