| 内蒙古正镶白旗中生代火山盆地侏罗系火山岩化学成分特征 |
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| 引用本文： | 赖绍聪. 内蒙古正镶白旗中生代火山盆地侏罗系火山岩化学成分特征[J]. 华东地质学院学报, 1988, 0(4) |
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| 作者姓名： | 赖绍聪 |
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| 作者单位： | 华东地质学院岩矿专业 研究生 |
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| 摘 要： | 本文利用岩石化学计算、作图和因子分析的方法,对内蒙古正镶白旗中生代火山盆地中侏罗系火山岩化学成分进行研究,并结合全岩稀土和铷锶同位素特征分析,得出了一些很有价值的地质信息,对于认识研究区火山岩成分特征有重要指导意义。研究结果表明,白旗侏罗纪火山岩系属钙碱性系列岩石,是同源岩浆经分异演化而成。化学成分具明显的演化规律。随岩浆分异程度的增加,硅碱逐渐增高,而铁镁则逐渐减少。岩石由偏中性逐渐变化为酸性。其原始岩浆主要来源于上地幔和下地壳的共同混溶作用。
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| 关 键 词： | 内蒙古 火山岩 化学成分 因子分析 |
CHARACTERISTICS OF THE CHEMICAL COMPOSITION OF JURASSIC VOLCANIC ROCK OF MESOZOIC VOLCANIC BASIN IN ZHEN XIANG BAI QI, NEI MONGGOL |
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| Lai Shaochong. CHARACTERISTICS OF THE CHEMICAL COMPOSITION OF JURASSIC VOLCANIC ROCK OF MESOZOIC VOLCANIC BASIN IN ZHEN XIANG BAI QI, NEI MONGGOL[J]. Journal of East China Institute of Technology, 1988, 0(4) |
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| Authors: | Lai Shaochong |
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| Affiliation: | Lai Shaochong |
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| Abstract: | Using rock chemistry,calculation,diagram,factor analysis, rare earth element and Rb-Sr isotope, this paper deals with characteristics of chemical composition of Jurassic volcanic rock of Mesozo ic volcanic basin in Zhen Xing Ba i Qi.Some useful geological information has been obtained as a guide to the cognition of studying characteristics of in the study area.The study results show that the series of Jurassic volcanic rock in Ba i Qi area belongs to calc-alkaline series.They are the result of same magma resource through differentiate and evolution.Its chemical composition possesses obvious pattern of evolution.With the increasing of differentiate degree, silicon and alkali increase, but iron and magnesium decrease.The rock changes from intermediate to acidic.The origin magma is the result of mixed melting of upper mantle and deep crustal. |
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| Keywords: | Nei Monggol volcanic rock chemical composition factor analysis |
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