| 利用稀土分布分形结构因子对碱性花岗岩稀土组成分类——以东准噶尔花岗岩为例 |
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| 引用本文： | 王喜生.利用稀土分布分形结构因子对碱性花岗岩稀土组成分类——以东准噶尔花岗岩为例[J].新疆地质,2001,19(3):180-184. |
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| 作者姓名： | 王喜生 |
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| 作者单位： | 卑尔根大学固体地球物理系 |
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| 基金项目： | 国家305项目(969150206)资助 |
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| 摘 要： | 尝试用稀土分布的分形结构因子（FSF）值对我国碱性花岗岩的稀土组成进行了分类。可将我国碱性花岗岩的稀土分布分形结构因子划分为4种类型：（1）弱变异型（0．98－0．95）；（2）中变异型（0．95－0．92）；（3）强变异型（0．92－0．89）；（4）超强变异型（0．89－0．86）。其中前两种类型可很好地对应重稀土富集型和中稀土亏损型花岗岩，而后两种类型可对应轻稀土相对富集型和轻稀土特富型花岗岩。利用FSF值对新疆东准噶尔地区三带富碱花岗岩按稀土组成进行了归类。
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| 关 键 词： | 东准噶尔地区 稀土分布 分形结构因子 碱性花岗岩 形成机制 |
| 文章编号： | 1000-8845(2001)03-0180-06 |
| 修稿时间： | 2001年6月11日 |
CLASSIFICATION OF ALKALI GRANITES IN THE EASTJUNGGER OF CHINA BY FRACTAL
STRUCTUREFACTOR OF REE PATTERN |
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| Wang Xi-sheng.CLASSIFICATION OF ALKALI GRANITES IN THE EASTJUNGGER OF CHINA BY FRACTAL
STRUCTUREFACTOR OF REE PATTERN[J].Xinjiang Geology,2001,19(3):180-184. |
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| Authors: | Wang Xi-sheng |
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| Abstract: | A new method to classify alkali granites in China by fractal structure factor (FSF) of REE pattern is suggested in this paper. The four types of fractal structure factor (FSF) of REE pattern for Chinese alkali granites are followings: (1) weak variation type; (2) median variation type; (3) strong variation type; (4) very strong variation type. There is much correspondence between type (1) and HREE-rich type granites, type (2) and MREE-scarce type granites, type (3) and LREE relatively rich type, type (4) and LREE very rich type individually. At last, the classification model classifies Alkali-rich granites in east Jungger. Generally there are four types of alkali granites in China: HREE-rich type, MREE-scare type and LREE-rich type. In this paper, a new classificationmethod for alkali granites by fractal structure factor (FSF) of REE pattern is suggested. Based on the classification, totally four types of REE patterns for Chinese alkali granites are identified: (1) weak-variation type, (2) median-variation type, (3) strong-variation type and (4) very-strong-variation type. There are good connections between weak-variation type and HREE-rich type, median-variation type and MREE-scarce type, strong-variation type and LREE-relatively-rich type, and very-strong type and LREE-very-rich type respectively. In accordance with the classification, Alkali-rich granites in east Jungger are sorted as followings: alkali granites in north zone are dominated by MREE-scare type, which are some characteristic of MREE-scare type; In central zone, alkali granites show a tendency from LREE-rich type to MREE-scare type; while in south zone, typical HREE-type alkali granites are predominant. |
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| Keywords: | fractal structure factor of REE pattern alkali granite the east Jungger of Xinjiang |
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