| 江西东乡赛阳关破火山口的特征及演化 |
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| 作者姓名： | 何晓亮 |
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| 作者单位： | 上海市地质矿产局 |
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| 摘 要： | 赛阳关破火山口火山活动具多期次性,以多相火山一次火山侵入相为特点。火山喷发物成份的规律变化,表明岩浆源呈层状垂直分带。破火山口的塌陷具不均一性,明显偏向东南一侧,其演化过程为:中心式熔岩溢流,揭开火山活动的序幕;沿环状裂隙强烈的火山灰流喷发,进入破火山口发育阶段;以及由此而产生的沉陷。
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| 关 键 词： | 火山演化 破火山口特征 江西东乡赛阳关 |
THE CHARACTERISTIC AND EVOLUTION OF THE CALDERA IN SAIYANGGUAN DONGXIANG OF JIANGXI PROVINCE |
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| Authors: | He Xiaoliang |
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| Abstract: | Volcanic activities of the Calderain Saiyangguan, Dongxiang of Jiangxi Province has periodic feature with multi-facies volcano-subvolcanic intrusive facies, The regular changing of eruptive materials has indicated that the magmatic source has been vertically distributed in layer state. The collapse of the caldera is not only in homogenous, but also inclined to the SE side and its evolution process can be: central-type lava eruption to raise the curtain of the volcanic activties: the intensive volcanic ash flow along circular fissure er-uptting and going into the development stage and causing caldera subsidence thereby. |
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| Keywords: | volcanic evolution the feature of caldera Saiyangguan of Dongxiang in Jiangxi Province |
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