| 安徽铜陵二叠系龙潭组火山岩的发现及其意义 |
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| 引用本文： | 吕培基
,金福全
,颜怀学
,俞沧海.安徽铜陵二叠系龙潭组火山岩的发现及其意义[J].合肥工业大学学报(自然科学版),1993(2). |
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| 作者姓名： | 吕培基 金福全 颜怀学 俞沧海 |
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| 摘 要： | 首次在铜陵凤凰山的二叠系龙潭组B层煤内及其下部发现的火山角砾岩、火山集块岩、英安岩,玻屑、岩屑凝灰岩、具有爆发相—喷溢相的特点,属裂隙型喷发的近火山口相产物,英安岩的成矿元素含量(ppm)很高,Au·Ag的含量高于克拉克值10-18倍。火山岩形成的构造条件为岛弧陆缘环境。
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| 关 键 词： | 二叠系 龙潭组 火山岩 |
THE DISCOVERY OF VOLCANIC ROCKS IN LONGTAN FORMATION OF PERMIANG SYSTEM IN TONGLING, ANHUI AND GEOLOGICAL SIGNIFICANCE |
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| Lu Peiji Jin fuquan Yan Huanxue Yu Canghai.THE DISCOVERY OF VOLCANIC ROCKS IN LONGTAN FORMATION OF PERMIANG SYSTEM IN TONGLING, ANHUI AND GEOLOGICAL SIGNIFICANCE[J].Journal of Hefei University of Technology(Natural Science),1993(2). |
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| Authors: | Lu Peiji Jin fuquan Yan Huanxue Yu Canghai |
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| Institution: | Lu Peiji Jin fuquan Yan Huanxue Yu Canghai |
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| Abstract: | The volcanic rocks in Longtan formation,which is discovered for the first time .occur in B coal seam and its lower position in Longtan formation of Permian system in Fenghuang-shan. Tongling. They consist of volcanic breccia , volcanic agglomerate, dacite and crystal - vitric tuff. They have the characteristics of explosive-effusion facies. They ate products of fissure evup-tion near crater. Dacite has high content of mineralizing elements, and 10-18 times of the content of Au and Ag as that of clarke value. The structural setting of the formation of the volcanic rorks was continental margin. |
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| Keywords: | premian system tongling volacavie rocks |
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