CAJ | 학술논문

在现有罗布泊盆地新构造活动特征分析的基础上,设计了刚性基底和塑性基底两种砂箱实验模型进行实验模拟.实验结果显示,在近南北向区域构造挤压应力作用下,罗布泊盆地两侧的阿尔金山与库鲁克塔格均以逆冲岩片的形式向盆地强烈逆冲,形成一系列向盆地推覆的冲断-褶皱带,且局部发育断层三角带.库鲁克塔格山发育一系列具右旋走滑作用的冲断层,而阿尔金断裂带则形成具左旋走滑的逆冲活动,在两者共同作用下,导致塔东地块发生向西逃逸,导致罗布泊盆地内部处于东西向伸展状态,发育一系列近南北向断层.模拟实验结果较好再现了罗布泊盆地新构造变形特征,有助于探讨塔里木地块东缘构造形成机制.模拟实验也表明罗布泊盆地两侧的盖层变形特征明显受控于基底发育特征,而两种模拟实验结果的分析比较表明罗布泊盆地具有刚性基底.实验结果为研究该区构造与成钾、油气成藏关系提供了依据.
재현유라포박분지신구조활동특정분석적기출상,설계료강성기저화소성기저량충사상실험모형진행실험모의.실험결과현시,재근남북향구역구조제압응력작용하,라포박분지량측적아이금산여고로극탑격균이역충암편적형식향분지강렬역충,형성일계렬향분지추복적충단-습추대,차국부발육단층삼각대.고로극탑격산발육일계렬구우선주활작용적충단층,이아이금단렬대칙형성구좌선주활적역충활동,재량자공동작용하,도치탑동지괴발생향서도일,도치라포박분지내부처우동서향신전상태,발육일계렬근남북향단층.모의실험결과교호재현료라포박분지신구조변형특정,유조우탐토탑리목지괴동연구조형성궤제.모의실험야표명라포박분지량측적개층변형특정명현수공우기저발육특정,이량충모의실험결과적분석비교표명라포박분지구유강성기저.실험결과위연구해구구조여성갑、유기성장관계제공료의거.
Based on analysis of existing data of the Lop Nur basin, Neotectonic in this area have been modeled primarily by sandbox experiments. In this paper, two kinds of models have been carried out, and experimental result shows, controlled by nearly S-N compression, the Altyn Tagh Shan and Kuruktag thrusted strongly toward the Lop Nur basin at the same time, and many faults and fault-related folds developed in the S-N edges of the Lop Nur basin. The right-handed slip reverse faults have grown in the Kuruktag, and the left-handed slip reverse faults have developed in the Altyn Tagh Shan, by which the Lop Nur basin have been controlled, and resulted in the eastern Tarim block escaped toward west and the Lop Nur basin extended inside. In addition, the reverse faults developed in the cover of two edges of the Lop Nur basin extend according with its boundary faults. Our research also shows that deformation of the cover are controlled by the basement which is not plastic but rigid. The result of experiment has validated tectonic deformation of the Lop Nur basin at present, and provided a valuable reference for the research on mineralization in this area.