| 祁连造山带东段花岗岩体特征及其成因 |
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| 引用本文： | 张彦杰,邓亚萍,张宏斌.祁连造山带东段花岗岩体特征及其成因[J].甘肃地质学报,2005,14(2):23-29. |
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| 作者姓名： | 张彦杰 邓亚萍 张宏斌 |
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| 作者单位： | [1]甘肃省地质调查院,甘肃兰州730000 [2]中国地质大学,北京100083 |
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| 基金项目： | 中国地调局1：25万静宁县幅区域地质调查项目（编号：200113000016）部分成果. |
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| 摘 要： | 祁连造山带最东段的甘肃华家岭至张家川一带分布的中酸性花岗岩体可划分为2个侵入序列。Ⅰ期侵入体形成于加里东期,以成分演化为主,具钙碱性Ⅰ型花岗岩特点,岩浆来自壳幔混合源,其形成于板块俯冲有关的火山弧构造环境;Ⅱ期侵入体形成于印支期,表现为明显的结构演化性,具板内A-型富钾碱性花岗岩的特征,是陆内叠覆造山阶段由于壳内拆离滑脱产生的摩擦热使花岗质物质发生部分熔融而形成。总体上,区内及其邻区岩浆活动伴随了板块俯冲、碰撞、陆内叠覆造山作用过程。
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| 关 键 词： | 祁连造山带最东段 花岗岩体特征 成因 |
| 文章编号： | 1004-4116（2005）02-0023-0007 |
| 收稿时间： | 2005-04-07 |
GENESIS AND GEOLOGICAL CHARACTERISTICS OF THE GRANITIC
BATHOLITHS IN EAST QILIAN OROGENY |
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| ZHANG Yan-jie,DENG Ya-ping and ZHANG Hong-bin.GENESIS AND GEOLOGICAL CHARACTERISTICS OF THE GRANITIC
BATHOLITHS IN EAST QILIAN OROGENY[J].Acta Geologica Gansu,2005,14(2):23-29. |
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| Authors: | ZHANG Yan-jie DENG Ya-ping and ZHANG Hong-bin |
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| Institution: | 1. Geological survey of Gansu Province, Lanzhou 730000, China ; 2. China University of Geosciences, BeOing 100083, China |
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| Abstract: | The granitic batholiths are divided into 2 instrusive sequences. They expose between Huajia mountain and Zhangjiachuan area, the eastest section of Qilian orogenic zone. The I Period instrusive batholiths resulted from the volcanic arc evironment that was associated with ocean plates dive during Caledonia. It is calc-alklic in composition and changes in mineral components, the other resulted from superposition orogeny within land during Indosinian, it is high K - alklic in composition and changes in mineral constructures. The magmatism in the area was associated with the process that includes tectonic plates diving, collosure and super- position orogeny within land. |
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| Keywords: | The estest section of Qilian orogenic zone Granitic batholiths Geological characteristics Genesis |
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