| 内蒙古阿鲁科尔沁旗新民组“豆状”凝灰岩岩石学特征及成因探讨 |
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| 引用本文： | 钟辉,郜晓勇,伍月.内蒙古阿鲁科尔沁旗新民组“豆状”凝灰岩岩石学特征及成因探讨[J].地质与资源,2016,25(2):121-124. |
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| 作者姓名： | 钟辉 郜晓勇 伍月 |
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| 作者单位： | 中国地质调查局 沈阳地质调查中心(沈阳地质矿产研究所), 辽宁 沈阳 110034 |
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| 基金项目： | 中国地质调查局项目“松辽盆地外围深部地质调查”(编号1212011220242)，“内蒙古1:25万扎鲁特旗(L51C004001)幅区调修测”(编号1212011120670) |
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| 摘 要： | 内蒙古阿鲁科尔沁旗新民组出露有“豆状”凝灰岩，其中含“火山豆”（火山灰球）65%左右.“火山豆”发育同心韵律环带构造，有的发育有玻璃质边，有的可见长石晶屑嵌入其边缘，填隙物中可见有长石晶屑聚集现象.通过分析岩石结构及碎屑成分特征，认为“火山豆”凝灰岩是火山喷发过程中，由炽热的高能量高密度火山灰涌流向外迁移并伴随大气降水共同作用形成.
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| 关 键 词： | 火山豆 凝灰岩 岩石学特征 阿鲁科尔沁旗地区 内蒙古 |
| 收稿时间： | 2016-03-14 |
DISCUSSION ON PETROLOGY AND GENESIS OF THE PISOLITIC TUFF IN XINMIN FORMATION IN AR HORQIN QI,INNER MONGOLIA |
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| ZHONG Hui,GAO Xiao-yong,WU Yue.DISCUSSION ON PETROLOGY AND GENESIS OF THE PISOLITIC TUFF IN XINMIN FORMATION IN AR HORQIN QI,INNER MONGOLIA[J].Geology and Resources,2016,25(2):121-124. |
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| Authors: | ZHONG Hui GAO Xiao-yong WU Yue |
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| Institution: | Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110032, China |
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| Abstract: | The pisolitic tuff, occurring in the Xinmin Formation in Ar Horqin Qi, Inner Mongolia, contains 65% of volcanic pisolites (or volcanic mud balls). The volcanic pisolites are developed in concentric layered rhythmic texture, some of which are filled with feldspar crystal fragments around the pisolites. By analyzing the characteristics of texture and component of crystal fragments, it is considered that the pisolitic tuff is evolved from the flowing hot volcanic ash with high-energy and high-density, accompanied with atmospheric precipitation during volcanic eruption. |
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| Keywords: | volcanic pisolite tuff petrologic characteristics Ar Horqin Qi Inner Mongolia |
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