| 滇西中生代花岗岩岩石化学与某些地球化学特征 |
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| 引用本文： | 战新志,姚在永,杨继武.滇西中生代花岗岩岩石化学与某些地球化学特征[J].地球化学,1974(1):42-57. |
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| 作者姓名： | 战新志 姚在永 杨继武 |
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| 摘 要： | The pulsational characteristics of magmatic activity are discussed in terms of potyeyelcs, polyphases and polystagcs for Mesozoic granites from Ⅰ,Ⅱ, Ⅲ areas.Based on 141 rock analyses, 80 semiquantitative spectrographic analyses for the granites and 50 chemical analyses for beryllium, niobium and tantalum, the authors present pertinent diagrams and petrochemical-geoehemical parameters which bring out the periodic variations in the bulk chemical composition of the rocks as wen as the periodicity of rare metal mineralization during the differentiation and evolution of Mesozoic granitic magmas. It is noted that the mineralization of lithium, beryllium, niobium and tantalum took place principally at later stages of each magmatic cycle. A camparison of the petrochemical-geochemical characteristics between granites east and west of the L-R Fault has led to the recognition of two different granite areas and two geochemical provinces for beryllium.
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| 关 键 词： | 中生代 花岗岩 岩石化学 地球化学特征 |
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