摘要
根据塔里木盆地西南部麦盖提斜坡生长地层的发育模式,并结合不整合类型及发育特征的变化规律,探讨了麦盖提斜坡的构造演化过程。认为在早古生代时期,麦盖提斜坡为一北倾的斜坡,构造高点位于斜坡南部;晚古生代,麦盖提斜坡的构造演化过程具有明显的分段性,斜坡西段主要的构造演化时期始于早石炭世,并持续至早二叠世,构造高点迁移至斜坡中部,呈现出"中间高、两头低"的古构造特征;而斜坡东段的主要构造演化时期推迟至晚二叠世。新生代,麦盖提斜坡已反转为南倾的斜坡,构造高点已迁移至斜坡北部,斜坡东段从前中新世开始进入构造演化时期,而西段则推迟至中新世,且东段的构造活动强度要大于西段。
Based on the development models of growth strata, in combination with the type of unconformity and variational rules of the Maigaiti slope, finely research tectonic evolution of the Maigaiti slope. In the Early Cambrian, the Maigaiti slope presents the characteristic of the north dip slope and structural heighs lies in the north of the slope. In the Mesozoic, tectonic evolution of the western slope, Late Carboniferous--Early Permain is the Maigaiti slope is characterized by segmentation. In the main period of tectonic evolution, whereas, the main tectonic movement stage of eastern slope is postponed to Late Permain. The Maigaiti slope had reversed to south dip slope in the Cenozoic and structural heighs migrated to northern slope. Eastern slope started its activities since Miocene, whereas western slope was delay until Pliocene and intensity of tectonic activity in eastern slope is stronger than western.
出处
《地质论评》
CAS
CSCD
北大核心
2014年第1期91-101,共11页
Geological Review
基金
国家自然科学基金资助项目(编号41172125
40972090)
国家973项目(编号2012CB214804
2005CB422107)
中国石油化工股份有限公司项目(编号P11086)
国家科技重大专项(编号2011ZX05002-003-001)
中石化西北油田分公司项目(编号KY2012-S-051)的成果
关键词
塔里木盆地麦盖提斜坡
构造演化
生长地层
不整合类型
古构造格局
Maigaiti slope, Tarim Basin
tectonic evolution
growth strata
type of unconformity
palaeotectonic framework
