| 双峰式火山岩组合探视构造—岩浆演化 ——来自博格达构造带双峰式火山岩的启示 |
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| 引用本文： | 王玉玺,第鹏飞,王晓伟,汤庆艳,王怀涛,杨春霞,赵洪星.双峰式火山岩组合探视构造—岩浆演化 ——来自博格达构造带双峰式火山岩的启示[J].甘肃地质学报,2013,22(4):28-36. |
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| 作者姓名： | 王玉玺 第鹏飞 王晓伟 汤庆艳 王怀涛 杨春霞 赵洪星 |
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| 作者单位： | [1]甘肃省地质调查院,甘肃兰州730000 [2]甘肃省矿产资源储量评审中心,甘肃兰州730000 [3]甘肃省地矿局第三地勘院,甘肃兰州730050 [4]兰州大学西部环境教育部重点实验室,甘肃兰州730000 |
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| 摘 要： | 应用岩石组合及元素地球化学组合特征，已经能够较成熟的研究区域构造一岩浆演化过程，界定区域构造演化的时空界限。双峰式火山岩组合可形成于不同的大地构造背景下，笔者对不同的大地构造背景形成的双峰式火山岩的岩石学和地球化学特征进行了总结，针对在博格达造山带发现的双峰式火山岩，讨论其对构造一岩浆演化指示作用。博格达双峰式火山岩岩石组合及元素地球化学特征表明：裂谷作用始于早石炭世，结束于晚石炭世晚期或早二叠世早期。博格达裂谷作用存在东西时空差异性，根据裂谷演化早期双峰式火山岩的空间及东西天山在石炭纪火山活动的的差异，推断博格达西段裂谷作用稍微早于东段开始，但由于区域构造演化差异，裂谷演化程度东段强于西段，而东段可能早于西段裂谷闭合。
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| 关 键 词： | 双峰式火山岩 博格达造山带 大陆裂谷 |
Instruction of Tectonic-magmatic Evolution from Bimodal Volcanic Combination: Revelation from Bimodal Volcanic Rocks of Bogda Orogenic Belt |
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| WANG Yu-xi,DI Peng-fei,WANG Xiao-wei,TANG Qing-yan,WANG Huai-tao,YANG Chun-xia and ZHAO Hong-xing.Instruction of Tectonic-magmatic Evolution from Bimodal Volcanic Combination: Revelation from Bimodal Volcanic Rocks of Bogda Orogenic Belt[J].Acta Geologica Gansu,2013,22(4):28-36. |
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| Authors: | WANG Yu-xi DI Peng-fei WANG Xiao-wei TANG Qing-yan WANG Huai-tao YANG Chun-xia and ZHAO Hong-xing |
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| Institution: | 1. Geological Survey of Gausu Province, Lanzhou 730000; 2. Gansu Assessment Center of Mineral Resources Reserves, Lanzhou 730000; 3. No.3 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Mineral Exploration and Development, Lanzhou 730000; 4. Key Laboratory of West China Environmental System (Ministry of Education), Lanzhou University, Lanzhou 730000, China) |
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| Abstract: | Based on application of the rock assemblage and more maturely regional tectonic - magmatic evolution, and define tectonic evolution. Bimodal volcanic rocks may occur in many geochemistry, the study attempted to analyze the spatial and temporal series of the regional different geodynamic environments, and the features of petrology and geochemistry of that are reviewed in this paper. It is suggested that the Bogda rifting started in the Early Carboniferous, ended in the end of Late Carboniferous or Early Permian and has difference from the spatial and temporal boundaries. It is inferred that the Bogda rifting of western began slightly earlier than the eastern, evolution of eastern rifting stronger than the western by the regional tectonic evolution, and east rifting may be closed earlier than the western. |
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| Keywords: | Bimodal volcanic rocks Bogda Orogenic belt Continental rift |
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