CAJ | 학술논문

加里东运动对黔东南地区的沉积格局、岩浆活动、变形变质影响明显.形成了上古生界与下伏地层之间的不整合接触关系.广西罗城一龙胜、湖南通道地区是加里东运动的构造高住区,向西至黔东地区在平面上出现有规律的变化,表现为下伏地层分别为震旦系、寒武系、奥陶系和志留系;加里东运动之后泥盆纪早期的沉积反映出在构造高住区缺失沉积物.为剥蚀区.而在构造高位区的东、西两侧出现了泥盆纪早期的沉积,为坳陷区;接触界面的特征表现为从高角度不整合、低角度不整合至平行不整合;变形变质程度逐渐减弱,下古生界的变质程度从明显至不明显,从紧闲型阿尔卑斯式褶皱至开阔型阿尔卑斯式褶皱.同样,从广西罗城一龙胜向东也具有相同的变化趋势.反映该地区加里东运动的中心位置为广西罗城一龙胜、湖南通道一线.是该地区加里东期造山带的中心,在区域上可能向北东方向沿桃江、景德镇一线延伸,是南华裂谷海槽萎缩、消亡的具体体现.
가리동운동대검동남지구적침적격국、암장활동、변형변질영향명현.형성료상고생계여하복지층지간적불정합접촉관계.엄서라성일룡성、호남통도지구시가리동운동적구조고주구,향서지검동지구재평면상출현유규률적변화,표현위하복지층분별위진단계、한무계、오도계화지류계;가리동운동지후니분기조기적침적반영출재구조고주구결실침적물.위박식구.이재구조고위구적동、서량측출현료니분기조기적침적,위요함구;접촉계면적특정표현위종고각도불정합、저각도불정합지평행불정합;변형변질정도축점감약,하고생계적변질정도종명현지불명현,종긴한형아이비사식습추지개활형아이비사식습추.동양,종엄서라성일룡성향동야구유상동적변화추세.반영해지구가리동운동적중심위치위엄서라성일룡성、호남통도일선.시해지구가리동기조산대적중심,재구역상가능향북동방향연도강、경덕진일선연신,시남화렬곡해조위축、소망적구체체현.
Caledonian Movement in southeastem Guizhou area has a significant affect on the deposition pattern,magmatism,deforma-tion and metamorphism,and it leads to unconformity contact between the Late Paleozoic strata and underling strata.Luocheng-Longsheng in Guangxi and Tongdao region in Hunan are high-position tectonic areas of Caledonian Movement,which appears on a regular change westwards to eastern Guizhou area in the plane with underlying strata respectively Sinian,Cambrian,Ordovician and Silurian;after Caledonian Movement,the deposition of the early Devonian is featured by lack of sediments in the high-position tectonic area,namely erosion zone,while in east and west sides of high-position tectonic area it appears early Devonian sedimentation,namely de-pression area;contact interface is characterized by high-angle unconformit,low-angle unconformity and parallel unconformity;degree of deformation and metamorphism gradually weakens,and metamorphic degree of early Paleozoic strata decreases from obvious to not obvi-ous,thus from a close Alpnie-style fols tO the open-type Alpine folds.Similarly,eastwards of Guangxi Luocheng-Longsheng area al-so has the same trend.This fact has reflected center activating spot of the Caledonian Movement is Guangxi Luocheng-Longsheng and Hunan Tongdao line,also it's the center of the Caledonian orogeny belt,namely the inner belt,regionally it may extends to the north alongTaojiang,Jingdezhen line,which can be evidence of the shrink and extinction of Sonth China riti valley.