| 辽西阜新地区义县组的喷发旋回特征 |
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| 引用本文： | 王宇林,贾翠,仲米山,闫楠,高玉娟.辽西阜新地区义县组的喷发旋回特征[J].地层学杂志,2012(1):116-124. |
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| 作者姓名： | 王宇林 贾翠 仲米山 闫楠 高玉娟 |
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| 作者单位： | 辽宁工程技术大学资源与环境工程学院 |
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| 基金项目： | 阜新市地质勘查项目“阜新地区玛瑙成矿规律研究”(FD2010-05) |
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| 摘 要： | 通过581.64km的路线地质调查和对20.16km的实测剖面的研究,将辽西阜新地区义县组自下而上划分为喷发旋回Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ;每个喷发旋回的下部为火山碎屑岩组成的爆发相、中上部为熔岩组成的溢流相;熔岩类型主要是玄武岩、玄武安山岩、安山岩及部分英安岩、流纹岩、珍珠岩、黑曜岩、粗安岩;各喷发旋回内部及不同喷发旋回中,具有熔岩的酸性或碱性程度向上逐渐增强的总体变化规律。义县组在紫都台—七家子地区较老河土—十家子、后新秋—苇子沟地区的火山碎屑岩的总厚度偏大,而玄武岩的发育厚度偏小,且老河土—十家子地区缺乏喷发旋回Ⅴ等,空间分布有差异性。
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| 关 键 词： | 火山岩 喷发旋回 岩石地层 义县组 白垩系 阜新 辽宁 |
CHARACTERISTICS OF VOLCANIC ERUPTION CYCLES IN THE YIXIAN FORMATION IN THE FUXIN AREA,WESTERN LIAONING |
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| WANG Yu-lin,JIA Cui,ZHONG Mi-shan,YAN Nan and GAO Yu-juan.CHARACTERISTICS OF VOLCANIC ERUPTION CYCLES IN THE YIXIAN FORMATION IN THE FUXIN AREA,WESTERN LIAONING[J].Journal of Stratigraphy,2012(1):116-124. |
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| Authors: | WANG Yu-lin JIA Cui ZHONG Mi-shan YAN Nan and GAO Yu-juan |
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| Institution: | Resource and Environment Engineering College,Liaoning Technical University,Fuxin 123000 |
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| Abstract: | Through the survey of 581.64 km road-cut sections and the study 20.16 km measured section,five volcanic eruption cycles(Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ) have been recognized in the Yixian Formation in the Fuxin area of western Liaoning.The lower part of each eruption cycle is characterized by explosion facies with volcani clastic rocks,and the upper part of each cycle consists of lava facies.The main types of lava include basalt,basaltic andesite,andesite,dacite,liparite,obsidian,and trachyandensite.In each eruption cycle or alkaline volcanic rocks appear to become more abundant upsection.It appears that the total thickness of volcani clastic rock of the Fuxin Formation is greater in the Zidutai-Qijiazi area than in the Laohetu-Shijiazi and Houxinqiu-Weizigou areas,but the thickness of basalt is smaller.Eruption cycle Ⅴ is absent in the Houxinqiu-Weizigou area. |
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| Keywords: | volcanic rock eruption cycle Yixian Formation Cretaceous Fuxin area Liaoning |
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