| 大别山金刚台国家地质公园的火山岩相构造 |
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| 引用本文： | 杨泽强,彭翼,万守全,王云.大别山金刚台国家地质公园的火山岩相构造[J].地质调查与研究,2006,29(2):86-91. |
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| 作者姓名： | 杨泽强 彭翼 万守全 王云 |
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| 作者单位： | 河南省地质调查院,郑州,450007 |
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| 基金项目： | 国家财政补贴、河南省两权价款地质遗迹保护项目(2005) |
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| 摘 要： | 通过对大别山金刚台国家地质公园火山岩的岩性特征、火山岩相、相模式和火山机构的研究,认为火成岩斑状结构的含碎屑—碎屑状岩石可以有深成、浅成、侵出、喷溢或爆发等不同产状。以大斑、多斑、富碎斑和熔蚀斑为特征,发育涌动流纹、塑性集块和假堆积等构造,并与时差很小的大斑花岗岩基、大斑花岗斑岩脉呈侵入接触关系的非层状火山岩,预示其成因为深成端元属性。各种碎屑粒度越小和含量愈高,则指示更强的隐爆强度。提出景区内出露的火山岩均为潜火山岩,早期火山机构为偏心式脉动膨胀—隐爆潜火山岩体,晚期为爆破角砾岩筒。代表爆发相的火山碎屑岩埋藏在北部中—新生界盆地之中,在深剥蚀的大别山腹地不可能保存。
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| 关 键 词： | 大别山 金刚台组 潜火山岩 火山岩相构造 |
| 文章编号： | 1672-4135(2006)02-0086-06 |
| 修稿时间： | 2005年12月20 |
Structure and Facies of the Volcanic Rocks in Jingangtai National Geo-Park, Dabie Mountain |
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| YANG Ze-qiang,PENG Yi,WAN Shou-quan,WANG Yun.Structure and Facies of the Volcanic Rocks in Jingangtai National Geo-Park, Dabie Mountain[J].Geological Survey and Research,2006,29(2):86-91. |
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| Authors: | YANG Ze-qiang PENG Yi WAN Shou-quan WANG Yun |
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| Abstract: | Jingangtai National Geo-Park is located in Dabie Mountain between Anhui and Henan Provinces,China.The scene of the geo-park is rich in volcanic rocks,which predominately consists of pyroclast-bearing and volcanoclastic rocks with porphyritic texture and can be classed into plutonic,epizonal,intrusive,extrusive and eruptive environments.Volcanic rocks,characterized by huge phenocryst,multi-phenocryst,clastic phenocryst and corrosive phenocryst,developed with surging rhyolitic,plastic agglomerate and pseudo accumulation structure,showing intrusive contact with big phenocryst granite batholith and granite porphyry vein,demonstrates its plutonic attribution.Smaller clastics size and higher clastics content indicate stronger subexplosive intensity.Based on the study of the structure and facies of volcanic rocks in Jingangtai national geo-park of Dabie Mountain,this paper discusses the lithologic features,volcanic facies,facies model and structure of volcanic rocks.It is proposed that volcanic rocks occurred in view area is sub-volcanic rocks.Volcanic mechanism in early period is eccentric pulsant-subexplosive subvolcanic bodies and in late period diatreme breccia pipe.Volcanoclastic rock which reveals eruptive facies cannot be preserved in deep denuded hinterland of Dabie Mountain,is buried in the Mesozoic and Cenozoic basins of Dabie Mountain. |
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| Keywords: | Dabie Mt Jingangtai Fm Subvolcano Faices and structure of volcanic rock |
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