| 西秦岭洮坪地区花岗岩内部接触关系及等级体制填图 |
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| 引用本文： | 李永军,段永民,李新锋,赵林义,王国振.西秦岭洮坪地区花岗岩内部接触关系及等级体制填图[J].地球科学与环境学报,1993(Z1). |
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| 作者姓名： | 李永军 段永民 李新锋 赵林义 王国振 |
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| 作者单位： | 甘肃地矿局第一地质队 天水741020
(李永军，段永民，李新锋，赵林义)，甘肃地矿局第一地质队 天水741020(王国振) |
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| 摘 要： | 岩体内部接触关系的研究是花岗岩等级体制划分及填图的唯一途径。1:5万区调证实,以造山带复杂地壳组份为背景的西秦岭洮坪地区花岗岩类发育,其成因为以S型为主兼有Ⅰ型,因而兼有结构序列和成分序列双重演化规津。这对更有效地综合运用两种类型的划分方法和划分原则来进行超单元—单元划分并指导填图提供了方便。本文着重介绍划分原则、划分方案及野外识别复式岩浆侵入序次和演化序列等重要特征的内部接触关系。
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| 关 键 词： | 西秦岭洮坪 花岗岩 接触关系 |
TNTERNAL CONTACT RELATIONSHIP AND GEOLOGICAL MAPPING OF SUPERUNIT AND UNIT SYSTEM FOR GRANITES IN THE TAOPING REGION OF THE WESTERN QINLING |
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| Li Yongjun Duan Yongming Li Xingfeng Zhao Lingyi Wang Guozheng.TNTERNAL CONTACT RELATIONSHIP AND GEOLOGICAL MAPPING OF SUPERUNIT AND UNIT SYSTEM FOR GRANITES IN THE TAOPING REGION OF THE WESTERN QINLING[J].Journal of Earth Sciences and Environment,1993(Z1). |
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| Authors: | Li Yongjun Duan Yongming Li Xingfeng Zhao Lingyi Wang Guozheng |
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| Institution: | No. 1 Geological Team of Bureau of Geology and Mineral Resources of Gansu Province |
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| Abstract: | Studying the internal contract relationship of granites is only way to classify ruperunit - unit system and to map. The 1: 50000 regional geological survey shows that there are widespread granitic rocks in the Taoping region within the western Qinling erogenic belt which is on a background of complex crustral constituents. They have complicated genetic types dominated by S-type with I-type, which indicates that they have undergone an evolution both in textural sequence and in compositional sequence. As a result, the authors can comprehensively use the method and principles for the classification of these two types to classify superunits and units more effectively and to guide geological mapping.
This paper mainly introduces the principle,programme for classification and internal contract relationship by which such important characteristics as intrusion order of compound magma and evolutional sequence can be recognized. |
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| Keywords: | The western Qinling Taoping Granite Contract relationship |
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