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辽宁阜新地区义县组火山岩特征及喷发旋回划分

Yu-qi PAN,Zhi-an HUANG,Zi-jie WU,Lin SHI,Hong-wei BAO,You-wei LIANG,Yong-zhao GAO

Geology and Resources（2014）

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Abstract
阜新地区早白垩世义县组火山岩为一套钙碱性系列的基性—中性—中酸性—酸性火山岩组合,是拉张条件下断陷盆地内的火山喷发产物,岩浆来源于地壳.喷发韵律发育,具多期次喷发特点,岩浆演化明显,由基性→中性→酸性演化.由于火山喷发中心的迁移及火山作用时间、方式等因素影响,在各盆地中火山喷发产物具有明显的差异.在阜新-义县盆地内火山喷发产物发育最为完全,它代表了义县组火山岩岩浆演化的全过程.以岩浆演化特征的差异,可划分三个Ⅱ级旋回.
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Key words
Yixian Formation,calc-alkaline,fault basin,eruptive rhythm,division of cycles,Fuxin,Liaoning Province
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