摘要
欧亚板块东缘新生代盆地具有惊人相似的几何学特征，盆地边界均为Ｙ 断裂及Ｒ，Ｒ’断裂，平面形态呈准菱形（ 或Ｚ形），均为右行剪切拉分盆地。此拉分始于印度板块与欧亚板块碰撞，成形于欧亚板块向北退却与太平洋板块之间的右行剪切作用。太平洋西北边缘独特的裂谷型“弧后盆地”现象，恰是特有的印度板块与欧亚板块碰撞造成的。据沉降及变形特征，其构造演化可划分为３ 个一级阶段：右行走滑拉分裂谷阶段（ 始新世中期—中新世早期） 、挤压隆起阶段（ 中新世中期） 和后裂谷沉降阶段（中新世中晚期—第四纪）
All Cenozoic basinsin the east margin of Eurasia Plate have delimited by Y,Rand R’fractures .Such geo metricalsimilarities between the basins of different magnitudes suggestthat all ofthem are dextral pull apart basins. The dextral pulling apartstarted atthe beginning of collision between India and Eurasia Plates and developed during the north retreat process of Eurasia Plate which led torightlateralshearing subduction zone between Pacific and Eura sia Plates.The unique backarc basinsresulted from the unique collision between India and Pacific Plates.Thetectonic evolution ofthem can be divided intothree first order stages :(1)pull apartrifting (45 Ma ～17 or 15 Ma)stage ;(2) compression uplifting (around 17 Ma～15 Ma) ;(3)postrfifting (17 or 15 Ma ～0 Ma)stage .
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
1999年第3期187-191,共5页
Oil & Gas Geology
基金
国家自然科学基金
关键词
欧亚板块
右行剪切
新生代盆地
拉分盆地
Eurasia Palte
right shear
Cenozoic basin
pull apartbasin
back arc basin
