华北板块东南缘原型沉积盆地类型与构造演化

doi:10.11743/ogg20060216

摘要/Abstract

摘要：

华北板块东南缘原型沉积盆地类型受构造演化控制,古生代至中三叠世华北与扬子两大板块由"开"到"合",华北板块东南缘也经历了从震旦纪至中奥陶世的被动大陆边缘,到晚奥陶世至早石炭世早期的抬升剥蚀;早石炭世晚期-中三叠世由于板块的拼合,在大陆边缘形成前陆复理石沉积盆地;晚三叠世-早侏罗世,两大板块碰撞造山形成秦岭一大别造山带,与造山耦合形成磨拉石沉积盆地;中侏罗世-早白垩世,在造山期后造山带内部拆沉的同时,造山带边缘拆离,形成后缘伸展与前缘冲断的复杂构造类型;后期受古太平洋板块和太平洋板块活动控制,形成伸展断陷和坳陷盆地。

关键词: 前陆复理石沉积盆地, 前陆磨拉石沉积盆地, 拆离构造, 原型盆地类型, 华北板块

Abstract:

The types of original sedimentary basins on southeastern margin of North China plate were controlled by tectonic evolution. North China and Yangtze plates experienced the changes from"divergence"to"convergence"in Paleozoic-Middle Triassic. The southeastern margin of North China plate correspondingly experienced the changes from passive continental margin in Sinian-Middle Ordovician(Z-O₂)to uplifting and denudation in Late Ordovician to Early Carboniferous (O₃-C₁). During late Early Carboniferous-Middle Triassic (C₂-P₂), foreland flysch depositional basins were formed on the continental margin due to convergence of plates. During Late Triassic ?Early Jurassic, Qinling-Dabie orogenic zone was formed through the collision of the two plates, coupled with the formation of molasses sedimentary basins. During Middle Jurassic-Early Cretaceous, the margin of the orogenic belt detached while the epiorogenic subsidence occurred within the orogenic belt, resulting in a complicated structural pattern with outstretching on the trailing edge and thrusting on the leading dege. Outstretched fault-depression and down-warped basins were formed later under the control of the activities of Palaeo-Pacific plate and Pacific plate.

Key words: foreland flysch sedimentary basin, foreland molasses sedimentary basin, detached structure, type of original basin, North China plate

中图分类号:

TE111.1

余和中,韩守华,谢锦龙,等. 华北板块东南缘原型沉积盆地类型与构造演化[J]. 石油与天然气地质, 2006, 27(2): 244-252. doi: 10.11743/ogg20060216 Yu Hezhong,Han Shouhua,Xie Jinlong,et al. Types of original sedimentary basins and tectonic evolution on southeastern margin of North China plate[J]. Oil & Gas Geology, 2006, 27(2): 244-252. doi: 10.11743/ogg20060216

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