| 东天山喀尔力克康古尔塔格组火山岩特征 |
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| 引用本文： | 张兴龙,郑玉洁,倪梁.东天山喀尔力克康古尔塔格组火山岩特征[J].新疆地质,2004,22(3):296-299. |
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| 作者姓名： | 张兴龙 郑玉洁 倪梁 |
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| 作者单位： | 1. 新疆维吾尔自治区地质调查院第一地调所,新疆,乌鲁木齐,830011
2. 新疆维吾尔自治区国土资源厅,新疆,乌鲁木齐,830001 |
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| 摘 要： | 准噶尔板块南缘喀尔力克古生代岛弧带内的中泥盆世火山活动较为频繁,喷发韵律主要为溢流-沉积及爆发-沉积,每次火山活动后均有停歇间断,间歇期沉积火山碎屑沉积岩和正常沉积岩.爆发相中岩石出现较多的熔结凝灰岩,沉积相中出现植物化石,是陆相火山-沉积体系的特点.火山喷发系数由西向东为61.94%~30%,其中具溢流相岩石减少,爆发岩相增多的演变特点,根据岩石化学、地球化学特征综合分析研究,反映火山活动具陆缘弧构造环境的特征.除上述火山岩相外,还存在古火山机构——火山颈相的岩石,具中心式火山喷发的特点.
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| 关 键 词： | 康古尔塔格组 火山岩岩石化学 陆缘弧构造环境 |
| 文章编号： | 1000-8845(2004)03-296-04 |
| 修稿时间： | 2003年9月15日 |
CHARACTERISTICS OF MIDDLE DEVONIAN KANGUERTAGE FORMATION VOLCANICS FROM KAERLIKE OF EASTTIANSHAN |
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| ZHANG Xing-long,ZHENG Yu-jie,NI Liang.CHARACTERISTICS OF MIDDLE DEVONIAN KANGUERTAGE FORMATION VOLCANICS FROM KAERLIKE OF EASTTIANSHAN[J].Xinjiang Geology,2004,22(3):296-299. |
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| Authors: | ZHANG Xing-long ZHENG Yu-jie NI Liang |
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| Institution: | ZHANG Xing-long1,ZHENG Yu-jie1,NI Liang2 |
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| Abstract: | Volcanic activities occured more frequently in the Middle Devonian of Paleozoic island arc belts which was located in Kaerlike at the south of Junggar plate. Explosion rhythm belongs to flooding sedimentary and explosion sedimentary. In the interval between two adjoint volcanic activity, a set of volcanic clastic rock and holoclastic rock settled down. Dominated ignimbrite can be found in eruptive facies while phytolite can be found in sedimentary facies and that implies the characteristics of continental volcanic sedimentary. The coefficients of volcanic explosion wore off from 61.94 percent in west to 30 percent in the east. The evolution shows the characteristics of flooding facies rock decreasing and eruptive facies rock increasing. According to comprehensive research of lithochemistry and geochemistry, we conclude that these volcanic activities occurred in marginal arc. Pleaovolcanic edifice, volcanic neck rocks also exist and indicte central eruption characters |
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| Keywords: | Kanguertage formation volcano rock chemistry island arc construction environment |
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