CAJ | 학술논문

本文利用川西盆地"安县"运动产生的不整合面,对存在多个地层划分分区的川西盆地上三叠统须家河组地层进行了岩性地层和层序地层的对比和划分.在具体分析了前陆盆地逆冲断层的幕式活动基础上,提出了前陆盆地中可容空间变化的不统一性,并且进一步在总结Posamentier(1992)利用盆地中构造沉降速度的分带现象将前陆盆地二分理论的基础上,提出了前陆盆地可容空间变化带分为四带:消失带、减小带、增加带、产生带.进而从构造运动、气候变化、物源供给和河流平衡剖面迁移四个方面对影响前陆盆地可容空间变化特征的因素进行了分析,认为河流平衡剖面迁移在前陆盆地中起到比断陷湖盆中更为重要的作用.
본문이용천서분지"안현"운동산생적불정합면,대존재다개지층화분분구적천서분지상삼첩통수가하조지층진행료암성지층화층서지층적대비화화분.재구체분석료전륙분지역충단층적막식활동기출상,제출료전륙분지중가용공간변화적불통일성,병차진일보재총결Posamentier(1992)이용분지중구조침강속도적분대현상장전륙분지이분이론적기출상,제출료전륙분지가용공간변화대분위사대:소실대、감소대、증가대、산생대.진이종구조운동、기후변화、물원공급화하류평형부면천이사개방면대영향전륙분지가용공간변화특정적인소진행료분석,인위하류평형부면천이재전륙분지중기도비단함호분중경위중요적작용.
Based on the unconformity which comes from the "Anxian"orogeny, writers have studied the correlation and division for lithology and sequences stratigraphy in the Upper Triassic Xujiahe Formation in the western Sichuan Basin. At first writers researched the episodic tectonic movements of the thrust system in the foreland basin, and writers found the un-unity of the characters of the accommodation change in the foreland basin. On the basis of the theory of Posamentier (1993) about the zones of the structure in foreland basin, writers divided the accommodation of foreland basin into four zones: lost zone, reduced zone, enlarged zone, and produced zone. Finally writers analyzed the four factors of the changes of the accommodation in foreland basin, which are the tectonic movements, climate changes, sediment supply, and fluvial balanced cross section. And writers consider that the fluvial balanced cross section is more important in foreland basin than in infaulted down lacustrine basin.