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Modelling of the Evolution of Collision Mountain Range across the Contact Zone between West Kunlun and Tarim
Author(s): ZHANG Guibin, GAO Rui, XIAO Xuchang
Pages: 541-
546
Year: 2001
Issue:
6
Journal: ACTA GEOSCIENTIA SINICA
Keyword: 山隆盆降; 岩石圈根; 有限元数值模拟; 动力学演化;
Abstract: 最近的地震探测表明,在西昆仑和塔里木结合带有岩石圈根存在.据此,本文提出地壳均衡与岩石圈根拖曳共同作用导致"山隆盆降"的动力学机制假说.利用新近中英合作完成的有限元粘弹塑构造数值模拟技术FEVPLIB,模拟研究了青藏高原西部横过西昆仑和塔里木结合带剖面的这一动力学演化过程.这种模式既能解释高原隆升,又能解释边缘沉积盆地的成因.模拟结果表明,两个大陆碰撞到一起,当岩石圈根一旦形成以后,造山水平挤压力主要来源于岩石圈根的向下拖曳,而印度板块向北挤压沦为次要因素.
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