江汉盆地反转构造类型及分布特征  

TYPE AND DISTRIBUTION CHANACTERISTICS OF INVERTED STRUCTURES IN JIANGHAN BASIN

作　　者：郑天发[1] 傅宜兴[1] 

机构地区：[1]江汉石油管理局勘探开发研究院,433124

出　　处：《石油勘探与开发》1997年第6期36-38,共3页Petroleum Exploration and Development

基　　金："八五"国家级科技攻关项目!85-102-14-04

摘　　要：江汉盆地在陆相发展阶段，经历了早期（燕山运动晚期至喜山运动早期）的构造负反转和晚期（喜山运动晚期）的构造正反转。早期构造负反转形成的拉张断陷叠加在先期压扭住断裂诏皱带上，受北东向剪切带控制发育的负反转构造一般成为半地堑式断陷，沉积的白垦系和下第三系是江汉盆地的陆相勘探目的层系；沿北西-北北西向挤压构造带分布的负反转构造成为地堑式断陷。喜山运动晚期江汉盆地发生构造正反转，时间东早西晚，反转程度东强西弱，反映区域性挤压作用力来自盆地以东。正反转构造划分为发育比较成熟的全正反转构造（褶皱剥蚀型，断裂上下皆逆型，断裂上逆下正型）和正反转程度弱的准正反转构造（地层上下皆凸型和上凸下凹型），简述其剖面鉴别特征和发育部位。江汉盆地的构造反转现象为中国东部陆相断陷盆地的反转构造研究提供了又一实例。During its development of continental deposits, Jianghan basin underwent the early negative inversion of structures (fromLate Yanshan movement to Early Himalayan movement) and late positive inversion of structures (during Late Himalayanmovement). The extensional rift formed by early negative inversion of structures superimposed on the initial compressional-shear fracture-fold belts. The negative inversion structures controlled by N-E shear zones generally became semi-graben rifts.The Paleogene and the Cretaceous deposits are the exploration targets of continental facies in Jianghan basin. The negativeinversion structures distributed along NW-NNE compressed zones became rifts of graben type. During Late Himalayanmovement, the structures positively inverted in Jianghan basin, the timing of which is early in the east and late in the west,and the degree of inversion is strong in the east and weak in the west, showing that the regional compression force is from theeast of the basin. Positive inversion structure are subdivided into complete positive inversion structures which arecomparatively mature (such as fold-degradation troe, both upper and lower parts of fracture being inverse as well as upperfracture inverse and lower fracture positive) and pene-positive inversion structures with a weak positive inversion (such asboth upper and lower strata are convex and the upper convex but the lower concave). This paper presents brieny theidentification characteristics and the development position of their sections. The inversion of structures in Jianghan basinbrings us another example for studving inversion structures in continental rift basins of East China.

关 键 词：盆地 构造演化 构造类型 石油勘探 

分 类 号：P618.130.8[天文地球—矿床学]