CAJ | 학술논문

滇西南腾冲地块中部的梁河盆地地层出露较好，阶梯状地貌发育，并有多期火山活动，是开展新构造研究的良好地点。综合地表调查与年代学研究结果发现，该盆地主要发育新近纪南林组与芒棒组和第四纪地层，各时代地层的沉积及变形特征都明显不同，其中最早的盆地沉积南林组地层的固结及变形程度高；芒棒组的固结及变形程度则稍差；第四纪地层没有固结或弱固结，且基本无变形。该区在地貌上共发育7级阶（台）地，各级地貌面主要形成于早更新世以来。该区的火山活动至少包括3.5~5.0Ma、2.3~2.9Ma、1.0~1.5Ma及0.5~0.7Ma四期。综合梁河盆地中地层、地貌、火山等方面的新构造运动标志，将腾冲地块的新构造运动初步划分为3个阶段：①5Ma之前，盆地开始断陷，南林组沉积及掀斜变形；②5~2Ma，盆地进一步扩张，芒棒组沉积及掀斜变形，并伴随火山活动；③2Ma以来，盆地萎缩抬升，形成多级台地及阶地，并伴随多期火山活动。
전서남등충지괴중부적량하분지지층출로교호，계제상지모발육，병유다기화산활동，시개전신구조연구적량호지점。종합지표조사여년대학연구결과발현，해분지주요발육신근기남림조여망봉조화제사기지층，각시대지층적침적급변형특정도명현불동，기중최조적분지침적남림조지층적고결급변형정도고；망봉조적고결급변형정도칙초차；제사기지층몰유고결혹약고결，차기본무변형。해구재지모상공발육7급계（태）지，각급지모면주요형성우조경신세이래。해구적화산활동지소포괄3.5~5.0Ma、2.3~2.9Ma、1.0~1.5Ma급0.5~0.7Ma사기。종합량하분지중지층、지모、화산등방면적신구조운동표지，장등충지괴적신구조운동초보화분위3개계단：①5Ma지전，분지개시단함，남림조침적급흔사변형；②5~2Ma，분지진일보확장，망봉조침적급흔사변형，병반수화산활동；③2Ma이래，분지위축태승，형성다급태지급계지，병반수다기화산활동。
The well exposed strata, the terraced multi-platforms and multi-period volcanic activity in Lianghe Basin indicate neotec?tonics of central Tengchong block. The each era sediments and deformation show different characteristics, that is the Miocene Nanlin Formation has the highest degree of consolidation and deformation, the Pliocene Mangbang Formation higher and the Quaternary Strata a little or no. The seven levels terrace are found in which the 5th terrace is most well preserved. There are at least four period volcanic activity in Lianghe Basin, including 3.5~5.0Ma, 2.3~2.9Ma, 1.0~1.5Ma and 0.5~0.7Ma from old to young respectively. Ac?cording to the new chronology study results, the neotectonic movement episodes can be divided into three period: ①before 5Ma, in?cluding basin formation, consolidation and deformation of Nanlin formation; ②5~2Ma, consolidation and deformation of Mangbang formation along with multi period volcano activity;③after 2Ma, multi-stage platforms and terraces formation with multi period vol?cano activity.