王亮,赵红岩,邱春光,邹耀遥,郑晨宇,杨超群,沈传波

• 1:中国地质大学(武汉)资源学院
• 2:中国地质大学(武汉)构造与油气资源教育部重点实验室
• 3:中国地震局地球物理勘探中心
• 4:中国海洋石油国际有限公司

摘要(Abstract)：

作为威尔逊旋回萌芽阶段的典型陆内裂谷,东非裂谷是研究板块构造运动学和动力学的天然场所。新生代东非裂谷东支Turkana坳陷受前寒武系基底先存构造及中生代裂谷活动的影响,分析其演化及动力学机制,对进一步深入认识大陆裂谷演化过程具有重要的意义。基于低温热年代学、钻井及野外露头资料,结合地震资料解释和断层活动性分析,重新厘定了Turkana坳陷新生代裂谷演化时序,将新生代裂谷演化过程分为4个阶段,裂谷演化具有"南早北晚,先宽后窄,向东迁移"的特点。通过探讨裂谷发育的成因模式,认为新生代裂谷演化整体上受控于先存构造和地幔柱的联合作用,地幔活动迁移影响着火山及裂谷活动的迁移,并导致了裂谷发育模式和动力学机制的变化。

关键词(KeyWords)： 东非裂谷;Turkana坳陷;断层活动;裂谷演化;板块构造

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家科技重大专项子课题(2017ZX05032-002-004)

作者(Author): 王亮,赵红岩,邱春光,邹耀遥,郑晨宇,杨超群,沈传波

DOI: 10.19509/j.cnki.dzkq.2021.0512

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