CAJ | 학술논문

内蒙古阿巴嘎旗北部位于西伯利亚板块东南大陆边缘晚古生代陆缘增生带的二连-贺根山板块对接带的西北侧。晚古生代至中新生代岩浆及火山活动频繁，火山岩分布广泛。通过对该区1：5万区域地质填图和实测地质剖面工作，以及室内的详细研究发现出露于本区的侏罗纪火山岩(白音高老组J3 b)以中酸性熔岩和火山碎屑岩为主，岩性特征自下而上具有喷发韵律性。依据岩石组合、岩石特征反映其为陆相火山岩建造。将本区白音高老组火山岩定为中酸性火山喷发旋回，依据岩相划分出5个喷发韵律，每一韵律岩浆成分总体上以流纹质为主，底部常为英安质或安山质，以爆发相为主，喷溢相较少，说明该时期火山活动较强，属较强盛时期。总体上白音高老组反映了喷溢-爆发相、爆发相相间的周期，具有由弱到强的反韵律特征。
내몽고아파알기북부위우서백리아판괴동남대륙변연만고생대륙연증생대적이련-하근산판괴대접대적서북측。만고생대지중신생대암장급화산활동빈번，화산암분포엄범。통과대해구1：5만구역지질전도화실측지질부면공작，이급실내적상세연구발현출로우본구적주라기화산암(백음고로조J3 b)이중산성용암화화산쇄설암위주，암성특정자하이상구유분발운률성。의거암석조합、암석특정반영기위륙상화산암건조。장본구백음고로조화산암정위중산성화산분발선회，의거암상화분출5개분발운률，매일운률암장성분총체상이류문질위주，저부상위영안질혹안산질，이폭발상위주，분일상교소，설명해시기화산활동교강，속교강성시기。총체상백음고로조반영료분일-폭발상、폭발상상간적주기，구유유약도강적반운률특정。
The Northern Abagaqi is located in the northwest of the suture belt between Erlian and Hegenshan Plate that is part of the accretion zone of late paleozoic continental margin on the southeast continental margin of the Siberian Plate. The volcanic magma activity is frequent and volcanic rocks are widely distributed from the late paleozoic to the middle cenozoic. Based on 1:50 000 regional geological mapping of the actual geological section and a detailed research on Northern Abagaqi, the Baiyingaolao Formation (J3b) of jurassic rock, was given a intermediate-acid lava and pyroclastic rock priority and its lithologic structure was of bottom-up eruption rhythmicity. According to the rock assemblage and characteristics, the rock reflected its continental volcanic building. The Baiyingaolao Formation volcanic rocks had an acidic volcanic eruption cycle, on account of the facies that could be divided into five eruption rhythms, and each rhythm magma composition was of mainly rhyolitic volcanic rock, and its bottom was often of the dacitic or andesitic volcanic rock. Their erupting facies were more numerous than their flowing facies, showing that the period of volcanic activity was stronger. They reflected the flowing-erupting and erupting facies in turn and had weak-to-strong anti-rhythmic features.