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扬子地台西缘对Rodinia形成期地质响应 被引量:6
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作者 王康明 阚泽忠 《华南地质与矿产》 CAS 2001年第4期22-27,共6页
扬子地台西缘冕宁 -会理地区在中新元古代Rodinia形成期地质响应强烈 ,地质记录丰富 ;在中元古代时期 ,本区自北而南、自东而西由克拉通边缘盆地演变为陆缘拗陷盆地 (南部 )和陆间裂谷盆地 (西部 ) ;自新元古代以来 ,盆地构造演化分异... 扬子地台西缘冕宁 -会理地区在中新元古代Rodinia形成期地质响应强烈 ,地质记录丰富 ;在中元古代时期 ,本区自北而南、自东而西由克拉通边缘盆地演变为陆缘拗陷盆地 (南部 )和陆间裂谷盆地 (西部 ) ;自新元古代以来 ,盆地构造演化分异更为明显 ,其北部会理天宝山地区形成岛弧(90 6Ma) ,而冕宁地区演变为弧后盆地 ,同时伴有广泛低绿片岩相区域动力变质 ;岛弧南部会理菜子园、西南部盐边荒田地区产生地块碰撞拼贴 ,形成混杂岩带 (85 6Ma) ;西侧形成双深成岩带(80 0 .9~ 815Ma) ,沿该岩带产生高绿片岩相 -麻粒岩相区域低压热流变质 ;随汇聚继续向陆块推进 ,产生新生火山弧 (812Ma) ,并相继产生弧 -陆碰撞 ,导致S型岩浆侵位 (6 6 9~ 6 87Ma)。至此 ,本区陆块汇聚作用结束 ,至晚震旦世 ,重新拗陷转入被动大陆边缘盆地演化时期。 展开更多
关键词 RODINIA 岛弧 混杂岩 双深成岩带 扬子地台 火山-沉积岩
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Bimodal Volcano-Plutonic Complexes in the Northern Frames of Eastern Section of MongoI-Okhotsk Orogenic Belt 被引量:1
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作者 Inna Derbeko 《Journal of Earth Science and Engineering》 2012年第2期84-96,共13页
Mongol-Okhotsk orogenic belt was formed during almost all the Phanerozoic period. The bimodal late Paleozoic-early Mesozoic formations were stated in the frames of the western section of Mongol-Okhotsk belt. Their for... Mongol-Okhotsk orogenic belt was formed during almost all the Phanerozoic period. The bimodal late Paleozoic-early Mesozoic formations were stated in the frames of the western section of Mongol-Okhotsk belt. Their formation is connected with the collision of north Asian and Sino-Korean continents. These collision processes were conjugated with the dimensioned intraplate processes in the region. The rocks of the bimodal volcano-plutonic complex were also stated in the frames of the eastern section of Mongol-Okhotsk orogenic belt. This should proof the identity of geological processes, which accompanied the collision of north Asian and Sino-Korean continents, during all the stage of the formation of the Mongol-Okhotsk belt. 展开更多
关键词 Mongol-Okhotsk orogenic belt bimodal volcano-plutonic complex cretaceous period.
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