塔里木板块石炭-二叠纪原型盆地与沉积模式

PROTOTYPE BASIN AND SEDIMENTARY MODEL OF PERMO-CARBONIFEROUS IN TARIM PLATE

何治亮 苟华伟 李孝容 阎秀刚

He Zhiliang Gou Huawei Li Xiaorong Yan Xiugang

塔里木板块在石炭-二叠纪是克拉通盆地演化后期的主要阶段,其原型盆地形成于板块会聚背景。板块北侧沿汗腾格里-库米什断裂的陆-陆消减,导致北缘发生前陆挠折沉降,南侧沿康西瓦断裂的洋-陆消减,导致塔西南发生弧后前陆挠曲沉降,塔东北阿满地区则以萎缩期的热衰退和均衡沉降为主,沿且末-星星峡断裂北山-阿尔金地体的拼贴挤压,联合制约了板块的隆升发展。石炭-二叠纪从海侵—海退和气候从干—湿—干的变化与构造演化一起控制了塔里木板块的沉积环境与组合方式。

Permo-Carboniferous was the main period ih the late evolution of craton basin for Tarim Plate.its prototype basin was formed in the setting of plate convergence.The uplift and development of the plate was controlled by the continent-continent subduction along Hantengri-Kumux fault in the north side of the plate,leading to the foreland flexural-break subsidence on the north margin;by the oceanic-continent subduction along Kangxi-war fault in the south side,leading to the foreland flexural subsidence of back-arc in Southwest Tarim;by thermal decay and isostatic subsidence of the shriveling stage in Awati-Mangjiar region,Northeast Tarim;and by the mosaic and compression of Beishan-Altun landmass along Qiemo-Xingxingxia fault.During Permo-Carboniferous,tectonic evolution associated with sea level variation(from transgression to regression)and the cli-mate changes (from dry to wet,and then dry again) controlled the sedimentary environ-ment and assemblage pattern of the Tarim Plate.

10.11743/ogg19920101