| 大兴安岭北段早白垩世光华期火山地层格架控制因素及意义——以根河市库西火山构造洼地为例 |
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| 引用本文： | 钟辉,韩彦东,付俊彧,李仰春,张昱.大兴安岭北段早白垩世光华期火山地层格架控制因素及意义——以根河市库西火山构造洼地为例[J].地质与资源,2008,17(1):1-8. |
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| 作者姓名： | 钟辉 韩彦东 付俊彧 李仰春 张昱 |
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| 作者单位： | 1. 沈阳地质矿产研究所, 辽宁 沈阳 110033;2. 黑龙江省地质调查研究总院, 黑龙江 哈尔滨 150036 |
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| 基金项目： | 中国地质调查局1:25万额尔古纳左旗幅资助项目
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区域地质调查项目 |
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| 摘 要： | 大兴安岭中生代火山岩带北段大面积分布有中酸性火山岩，形成时代主要是早白垩世光华期.区内覆盖严重，给岩石地层的划分带来很多困难.文中以中生代早白垩世光华期库西火山构造洼地为例，从火山构造洼地的形成演化及岩浆演化双重角度讨论了其对火山地层层序的控制作用.岩浆作用及火山构造洼地的演化均具有连续性和不可逆性，对火山地层的控制作用表现在岩石化学及地球化学特征的有规律的变化.利用岩石化学反演方法定量模拟了岩浆形成演化过程，以此为依据讨论了火山地层的时空演化.结合火山构造洼地不同演化阶段对特殊火山岩相的控制作用及横向的可对比性，确定了火山地层的层间叠置规律.探索性地建立了大兴安岭北段早白垩世光华期区域性火山地层格架，为大兴安岭地区早白垩世地层对比及岩浆动力学分析提供了新思路.
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| 关 键 词： | 火山构造洼地 岩浆演化:定量模拟 火山地层格架 光华期 大兴安岭北段 |
| 文章编号： | 1671-1947(2008)01-0001-08 |
| 收稿时间： | 2007-05-09 |
| 修稿时间： | 2007年5月9日 |
CONTROLLING FACTORS AND SIGNIFICANCE OF EARLY CRETACEOUS VOLCANOSTRATIGRAPHIC FRAMEWORK IN NORTHERN DAXINGANLING REGION:A case study of Kuxi volcanotectonic depression |
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| ZHONG Hui,HAN Yan-dong,FU Jun-yu,LI Yang-chun,ZHANG Yu.CONTROLLING FACTORS AND SIGNIFICANCE OF EARLY CRETACEOUS VOLCANOSTRATIGRAPHIC FRAMEWORK IN NORTHERN DAXINGANLING REGION:A case study of Kuxi volcanotectonic depression[J].Geology and Resources,2008,17(1):1-8. |
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| Authors: | ZHONG Hui HAN Yan-dong FU Jun-yu LI Yang-chun ZHANG Yu |
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| Institution: | 1. Shenyang Institute of Geology and Mineral Resources, Shenyang 110033, China;2. Heilongjiang Institute of Regional Geological Survey, Harbin 150036, China |
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| Abstract: | Huge area of acid-intermediate volcanic rocks, most of which belong to Early Cretaceous Guanghua age, are distributed in Northern Daxinganling region. Because of heavy coverage, the division of strata is difficult. This paper, taking Kuxi volcanotectonic depression as example, discusses the forming and evolution of the volcanotectonic depression, the magmatic evolution and its control to the voicanostratigraphic sequence. The magmatism and the evolution of volcanotectonic depression are both continuous and irreversible. The lithochemistry and geochemistry vary with the volcanostratigraphy, which is controlled by the magmatism and the evolution of volcanotectonic depression. The forming and evolving process of magma is quantitatively simulated using lithochemical inverse method. Based on such result, combining with the control of the volcanotectonic depression to volcanic facies in different forming stages and correlation of different areas, the superimposition regularity of the volcanostratigraphy is determined. The regional volcanostratigraphic framework of Northern Daxinganling region in Early Cretaceous Guanghua age is established. |
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| Keywords: | volcanotectonic depression magmatic evolution quantitative simulation volcanostratigraphic framework Guanghua age Northern Daxinganling |
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